Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Blue, Yellow, & Other Colored Lasers



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 06-12-2017, 10:17 PM #1
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
karlos karlos is offline
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
Default IR wavelength - Lowest non visible + Photo sensors

What is the lowest IR wavelength you can get that is still invisible to view.
I'm need to turn off an a dark sensing photo electric sensor. normally I do this with a 680nm wave length. I believe the photo sensors best wavelength range for operation (turning off) is between 500nm and 650nm

part one. Lowest IR wavelength still not visible?
Part two. Has anyone tricked a standard outdoor dark sensing photoelectric sensor with a 800 - 900nm IR laser.

(( FYI this is not for street lights as in NZ where I life out street lights are on timers. it for a sensor on my own property ))


karlos is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 06-12-2017, 11:11 PM #2
Hap's Avatar
Hap Hap is online now
Super Moderator
 
Join Date: Sep 2013
Location: Morro Bay, CA, USA
Posts: 7,310
Rep Power: 46932
Hap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond repute
Send a message via Skype™ to Hap
Hap Hap is online now
Super Moderator
Hap's Avatar
 
Join Date: Sep 2013
Location: Morro Bay, CA, USA
Posts: 7,310
Rep Power: 46932
Hap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond repute
Send a message via Skype™ to Hap
Default Re: IR wavelength - Lowest non visible + Photo sensors

There isn't really a "lowest wavelength" of IR that is invisible for a persons eyes for everyone, as everyone's eyes are different form one another. Some members here can't see 808nm at all, while others see 980nm just fine(although of course very dim). It's assumed in general terms that 980nm is pretty much invisible to everyone though. 808nm while in the IR range can still be seen as a very dark, cherry red to most people at higher powers

-Alex
__________________
655nm: ROITHNER 650 Pointer 5mW
635nm: Generic "Laser Pointer" Pen 5mW
593.5nm: LaserGlow Rigel-2 3mW
532nm: Z-Bolt BTG-6-C 5mW
515nm: Generic "Laser Pointer-515P-10" Pen 12mW
473nm: CNI GLP-473 6mW
450nm: Z-Bolt BLP-5-S Pointer 6mW
405nm: Generic "Laser Pointer" Pen 35mW



"Open your eyes, look within. Are you satisfied with the life you're living?" -Bob Marley
"The stars should fall and the earth be riddled, imagine all your problems be seem so little, funny how the world so brittle." -Tribal Seeds
“The universe is a pretty big place. If it's just us, seems like an awful waste of space.” -Carl Sagan
You are important: Pale Blue Dot

Hap is online now   Reply With Quote
Old 06-12-2017, 11:18 PM #3
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
karlos karlos is offline
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

really appreciate the reply.
I'm OK with a bit of visibly at the pointer end, its more at the end that the laser goes into the sensor.
karlos is offline   Reply With Quote
Old 06-13-2017, 12:17 AM #4
paul1598419's Avatar
Class 4 Laser
 
Join Date: Sep 2013
Location: Washington State
Posts: 5,377
Rep Power: 49427
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
paul1598419 paul1598419 is online now
Class 4 Laser
paul1598419's Avatar
 
Join Date: Sep 2013
Location: Washington State
Posts: 5,377
Rep Power: 49427
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

Which photo sensor are you using? It should state in the data sheet the usable wavelengths. I don't think they are so narrow as to restrict near IR. In fact, you could use a photo pickup out of a remote receiver that uses IR in the transmitter. There are many of these and they can be had quite inexpensively.
__________________
405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 1.75 watts SkyRay Gifted
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

445nm 2 watt SMP Copper Host
477nm 127 mW 501B
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
635nm 1 watt Cyprus II
635nm 1 watt SMP Copper host
635nm 5mW pointer
635nm 100mW pointer
635nm Lifetime17 Mini-camo build 687mW
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
infrared video camera for collimating IR lasers
Ocean Optics USB2000 Spectrometer
Scientech Vector S310 with AC2500 10 Watt LPM
LaserBee II 3.2 Watt LPM
Radiant X4 3.7 Watt LPM

Last edited by paul1598419; 06-13-2017 at 12:17 AM.
paul1598419 is online now   Reply With Quote
Old 06-13-2017, 12:21 AM #5
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
karlos karlos is offline
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

Hi, thanks for the reply. Sensor already in place and has no labels or markings. Sensor is on my pole but has a electrical cable from it going to the neighbours which prevents me from replacing it, other wish I would just put a switch on it. I guess I just have to buy a laser close enough and try it. Would love to know if a 980nm would knock it out, was hoping to know whats possible before buying
karlos is offline   Reply With Quote
Old 06-13-2017, 12:28 AM #6
paul1598419's Avatar
Class 4 Laser
 
Join Date: Sep 2013
Location: Washington State
Posts: 5,377
Rep Power: 49427
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
paul1598419 paul1598419 is online now
Class 4 Laser
paul1598419's Avatar
 
Join Date: Sep 2013
Location: Washington State
Posts: 5,377
Rep Power: 49427
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

What you are talking about sounds highly illegal. I thought this was on YOUR property and had nothing to do with city services.
__________________
405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 1.75 watts SkyRay Gifted
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

445nm 2 watt SMP Copper Host
477nm 127 mW 501B
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
635nm 1 watt Cyprus II
635nm 1 watt SMP Copper host
635nm 5mW pointer
635nm 100mW pointer
635nm Lifetime17 Mini-camo build 687mW
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
infrared video camera for collimating IR lasers
Ocean Optics USB2000 Spectrometer
Scientech Vector S310 with AC2500 10 Watt LPM
LaserBee II 3.2 Watt LPM
Radiant X4 3.7 Watt LPM
paul1598419 is online now   Reply With Quote
Old 06-13-2017, 12:35 AM #7
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
karlos karlos is offline
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

read again Sir
Sensor is on my pole but has a electrical cable from it going to the neighbours which prevents me from replacing it

so from the street, cable comes across my land, to my pole on my land which goes underground to my house, cable goes up hill to neighbours. I'm free to do what I like with the light. in NZ you have to have a qualified electricalian to fit everything and I dont have the money to put into a light I only want off a few times a year.
karlos is offline   Reply With Quote
Old 06-13-2017, 12:45 AM #8
paul1598419's Avatar
Class 4 Laser
 
Join Date: Sep 2013
Location: Washington State
Posts: 5,377
Rep Power: 49427
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
paul1598419 paul1598419 is online now
Class 4 Laser
paul1598419's Avatar
 
Join Date: Sep 2013
Location: Washington State
Posts: 5,377
Rep Power: 49427
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

Yes, and that is called an easement. That means that though the pole may seem to be on your property, it isn't because the city has the rights to all easements.
__________________
405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 1.75 watts SkyRay Gifted
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

445nm 2 watt SMP Copper Host
477nm 127 mW 501B
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
635nm 1 watt Cyprus II
635nm 1 watt SMP Copper host
635nm 5mW pointer
635nm 100mW pointer
635nm Lifetime17 Mini-camo build 687mW
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
infrared video camera for collimating IR lasers
Ocean Optics USB2000 Spectrometer
Scientech Vector S310 with AC2500 10 Watt LPM
LaserBee II 3.2 Watt LPM
Radiant X4 3.7 Watt LPM
paul1598419 is online now   Reply With Quote
Old 06-13-2017, 12:53 AM #9
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
karlos karlos is offline
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

As much I would love to debate this with you I don't want to get to far of my topic. City responsibility for services in NZ end on you boundary. Then it is up to you as a property owner. so if say i bust a cable over my land, i pay to fix privately as it and has nothing to do with the local council. My neighbour has an easement for the right to convey power across my land. so from my pole to his, the cable is his and rightfully so. I'm only interested in my own light, on the pole.

if you have nothing else of value to add please respectfully move on. I do appreciate your first comment which was of value. thank you
karlos is offline   Reply With Quote
Old 06-13-2017, 12:53 AM #10
Rivem's Avatar
Class 2M Laser
 
Join Date: Feb 2016
Location: New Mexico and/or Colorado, USA
Posts: 918
Rep Power: 13452
Rivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond repute
Rivem Rivem is online now
Class 2M Laser
Rivem's Avatar
 
Join Date: Feb 2016
Location: New Mexico and/or Colorado, USA
Posts: 918
Rep Power: 13452
Rivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

Quote:
Originally Posted by paul1598419 View Post
Yes, and that is called an easement. That means that though the pole may seem to be on your property, it isn't because the city has the rights to all easements.
I don't really understand what karlos is explaining, but it is fairly common for electric utilities to attach lights to their poles with no interface to the property for customer lighting. It's usually a rental attached to the electric bill.

The big question is whether or not karlos owns/rents this light.

As for the question, a laser that you can't see wouldn't be good for this at all and would be too hazardous. These light sensors also usually have serious ir filters on them anyway.
__________________
Now in the Member Collections Section: Rivem's Collection.


Free after another brutal semester.
I'll still be a bit busy this summer, but expect to see more of me.

Last edited by Rivem; 06-13-2017 at 12:55 AM.
Rivem is online now   Reply With Quote
Old 06-13-2017, 12:57 AM #11
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
karlos karlos is offline
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

see above.
no rental, ownership with an easement for the neighbour... feel free to chip in anything form my original question. thanks
karlos is offline   Reply With Quote
Old 06-13-2017, 01:06 AM #12
Rivem's Avatar
Class 2M Laser
 
Join Date: Feb 2016
Location: New Mexico and/or Colorado, USA
Posts: 918
Rep Power: 13452
Rivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond repute
Rivem Rivem is online now
Class 2M Laser
Rivem's Avatar
 
Join Date: Feb 2016
Location: New Mexico and/or Colorado, USA
Posts: 918
Rep Power: 13452
Rivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

Quote:
Originally Posted by karlos View Post
see above.
no rental, ownership with an easement for the neighbour... feel free to chip in anything form my original question. thanks
Read the rest of my post. You'd be best off with some other method like a small remotely activated spotlight to hit the sensor. The ambient light sensors tent to be more sensitive to 405nm which isn't that visible to us. The IR laser would almost certainly be a waste.
__________________
Now in the Member Collections Section: Rivem's Collection.


Free after another brutal semester.
I'll still be a bit busy this summer, but expect to see more of me.

Last edited by Rivem; 06-13-2017 at 01:07 AM.
Rivem is online now   Reply With Quote
Old 06-13-2017, 01:14 AM #13
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
karlos karlos is offline
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

apologies I miss that part of your comment. thank you for the feed back.
am keen on something not visible. I'm trying to lose the light for view of aurora australis a few times a year. but otherwise the light is very useful to me
karlos is offline   Reply With Quote
Old 06-13-2017, 01:15 AM #14
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,805
Rep Power: 38344
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
RedCowboy RedCowboy is online now
Class 3B Laser
RedCowboy's Avatar
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,805
Rep Power: 38344
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

Duct tape a flashlight to it?



If it's ok with your neighbor maybe just set this in front of it?

http://www.ebay.com/itm/2pcs-48-LED-...MAAOSwFdtXyEAk

Or if you and your neighbor really don't want to see any pink glow you maybe could set this in front of it...at your own risk.

http://www.ebay.com/itm/Invisible-il...MAAOSw~AVYv5pj
__________________
You can not put freedom in a bag.
It is in fact an abstract concept.
Yet it is the single most valuable thing anyone has ever had.

Last edited by RedCowboy; 06-13-2017 at 01:32 AM.
RedCowboy is online now   Reply With Quote
Old 06-13-2017, 01:21 AM #15
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
karlos karlos is offline
Junior Member
 
Join Date: Jun 2017
Posts: 11
Rep Power: 0
karlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond reputekarlos has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

Im looking at a different kind of cell. the most common is: disclaimer I have limited knowledge of this and have looked around the web a lot, hence why Im her talking to people that know these things.. and hey learning a lot as I go )

The Light Dependent Resistor

a light dependant resistor
Typical LDR
As its name implies, the Light Dependent Resistor (LDR) is made from a piece of exposed semiconductor material such as cadmium sulphide that changes its electrical resistance from several thousand Ohms in the dark to only a few hundred Ohms when light falls upon it by creating hole-electron pairs in the material.

Typically then, it has a peak sensitivity wavelength (λp) of about 560nm to 600nm in the visible spectral range.

Nothing illegal here. nor would I condone it if it was.
karlos is offline   Reply With Quote
Old 06-13-2017, 01:24 AM #16
Rivem's Avatar
Class 2M Laser
 
Join Date: Feb 2016
Location: New Mexico and/or Colorado, USA
Posts: 918
Rep Power: 13452
Rivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond repute
Rivem Rivem is online now
Class 2M Laser
Rivem's Avatar
 
Join Date: Feb 2016
Location: New Mexico and/or Colorado, USA
Posts: 918
Rep Power: 13452
Rivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond repute
Default Re: IR wavelength - Lowest non visible + Photo sensors

Quote:
Originally Posted by karlos View Post
apologies I miss that part of your comment. thank you for the feed back.
am keen on something not visible. I'm trying to lose the light for view of aurora australis a few times a year. but otherwise the light is very useful to me
Understandable. Like I said though these light sensors are usually filtered very sharply on the red end of the spectrum unlike camera photosensors. If they're going to detect IR, it's going to be very close to the red. Probably would have to be below 800nm if it'll work at all.

That said, near-UV is a good option for this. You can easily get 405nm lasers or flashlights even lower that wouldn't interfere mu h with your view at all. A 365nm flashlight would be hardly visible, but I'm not sure how well it'd work.

Folks in my astronomy club usually use 532nm, 405nm, or 445nm to disable sensor lights with okay success.

Edit: just to be clear, yes your sensor has that sort of performance, but they very commonly have a plastic filter over them to keep them from responding to certain wavelengths.
__________________
Now in the Member Collections Section: Rivem's Collection.


Free after another brutal semester.
I'll still be a bit busy this summer, but expect to see more of me.

Last edited by Rivem; 06-13-2017 at 01:25 AM.
Rivem is online now   Reply With Quote
Reply

Tags
dark sensor, photosensor, smallest ir wavelength, tricking lights





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 04:54 AM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC