Old 02-04-2018, 05:14 AM #17
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Default Re: Infrared laser pointers?

Doesn't matter, what ever is real, is real, what we imagine and isn't, isn't. I have reason to think they exist and somehow found a way here, it would be very arrogant of us to think there isn't life out there in that big expanse which hasn't had more time to work on the distance problem and how to find a loop hole around the speed of light limitation.


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Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be ~very~ roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Relative Brightness vs Wavelength Calc: https://tinyurl.com/RHD-brightness

High Current Pulse Diode Drivers: https://tinyurl.com/ya7whuk3
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Old 02-04-2018, 05:24 AM #18
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Default Re: Infrared laser pointers?

Yes, and you've read mine. No need to rehash that here.
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Old 02-04-2018, 05:25 AM #19
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Default Re: Infrared laser pointers?

Yea, and I will admit, I want this to be true
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Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be ~very~ roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

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Old 02-04-2018, 05:31 AM #20
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Default Re: Infrared laser pointers?

I know you do, buddy.
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Old 02-04-2018, 05:31 AM #21
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Default Re: Infrared laser pointers?

OP says he wants to signal lights in clouds that are at 100ft up

Last edited by Encap; 02-04-2018 at 05:47 PM.
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Old 02-04-2018, 01:44 PM #22
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Default Re: Infrared laser pointers?

Quote:
Originally Posted by rstevens View Post
I will definitely post a thread in the welcome forum, just trying to get a feel for this board first. I live near Cincinnati, OH, Im pretty mechanically inclined, but have not worked with lasers or pointers before, I have a fair amount of electronics experience though.

Im planning an experiment, and actually needing an IR laser pointer and a regular laser pointer...let me explain what happened first...

About 3 months ago, I woke up overnight to go to the bathroom, it was raining and thunderstorming outside when I got up, before going back to bed I glanced out my bedroom window, and I noticed a light in the sky, as i looked closer, it was actually 3 separate lights that would all start from a center point, spread out, and then rotate in a clockwise rotation, then they would all re-start from the center again, I watched it do this numerous times over and over again, at first I thought it was some of those large advertising lights they shine up into the sky for special events, but this was at 4am and they were not coming from a source on the ground, whatever they were attached to, it was in the low clouds, but these lights were shining thru.

Ive seen this same thing about 4-5 times since then, always in the same general location, but at different times of the night, and only when there are dense cloud cover.

I talked to a few people I know about this, and someone suggested I try to signal it somehow, just to see what happens. the person I spoke to, claimed IR may be more effective, but I want to have both types on hand and try both.

I would be doing this from a 2nd floor window and Im estimating whatever the lights are attached to, it is roughly about 200-300ft up, sometimes lower, just depends on the cloud cover, Ive seen the lights as low as 100ft when conditions are right.

Ive never seen the outline of a craft or any part of something that tells me its a craft, but the lights are definitely in a pattern and they do move, so whatever they are attached to, is moving.

Thanks for all the help, I look forward to talking more on here.
Why... has he already communicated with the
lights in the sky ??

Gimme a Friggin break.....




Jerry
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Old 02-04-2018, 04:10 PM #23
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Default Re: Infrared laser pointers?

No ground lead to a copper stake 6' into the dirt, without it, the shielding is ineffective.
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Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be ~very~ roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Relative Brightness vs Wavelength Calc: https://tinyurl.com/RHD-brightness

High Current Pulse Diode Drivers: https://tinyurl.com/ya7whuk3
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Old 02-04-2018, 05:51 PM #24
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Default Re: Infrared laser pointers?

Quote:
Originally Posted by lasersbee View Post
Why... has he already communicated with the
lights in the sky ??

Gimme a Friggin break.....




Jerry
No, it was actually just a suggestion based on his experience using IR to identify objects in the sky that are not visible in any other spectrum. Ive read a few other things online that suggest IR is significant/ effective in this regard.

Cloud conditions where the lights are 100ft are extremely rare around here, most of the time, the lights are around 300ft.

Im not sure what it is, If it was man made or military, I think I would see the red or white flashing indicator lights thru the clouds too, as well as hearing the engine noise, I may not have mentioned there was no engine sound with any of my sightings.

My ex-wifes nephew is a pilot in the Air Force, I messaged him about this on FB the other day and waiting to hear back about his opinion.
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Old 02-04-2018, 05:54 PM #25
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Default Re: Infrared laser pointers?

I bought a Luna Optics "night vision" HD digital camera which can see IR sources in a portion of the near infrared spectrum to be able to see my IR laser beam profiles and collimation. I'm interested in viewing IR with camera's just for that, but there are some weird things going on with IR in the night sky from time to time too, maybe someday I will catch something.
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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions: - https://laserpointerforums.com/f37


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be ~very~ roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Relative Brightness vs Wavelength Calc: https://tinyurl.com/RHD-brightness

High Current Pulse Diode Drivers: https://tinyurl.com/ya7whuk3
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Old 02-04-2018, 06:50 PM #26
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Default Re: Infrared laser pointers?

You'll catch a cold in Alaska...
Don't you smell something in the Cloudy,
Rainy, Thunderstormy night sky...

Jerry
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Old 02-04-2018, 07:14 PM #27
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Default Re: Infrared laser pointers?

Yes, but had to chime in, as designed.
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Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions: - https://laserpointerforums.com/f37


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be ~very~ roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Relative Brightness vs Wavelength Calc: https://tinyurl.com/RHD-brightness

High Current Pulse Diode Drivers: https://tinyurl.com/ya7whuk3
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Old 02-04-2018, 08:53 PM #28
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Default Re: Infrared laser pointers?

__________________
405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

473nm 50 mW BWB-10-OEM DPSS
477nm 127 mW 501B
488nm 135 mW EDC Sharp diode
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
493nm 120 mW 501B
502nm 110 mW 501B Lifetime
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
574nm OptLaser DPSS Laser 36 mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
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Old 02-05-2018, 12:00 AM #29
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Default Re: Infrared laser pointers?

I always remember that TZ episode --
TO SERVE MAN --- It's a cook book !!!!!!!!!!
HM
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Old 02-05-2018, 12:54 AM #30
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Default Re: Infrared laser pointers?

I remember that Rod Serling original show quite well. It ran for six years in the early 60s, but started in 59, IIRC. A lot of later movie stars and TV stars got their start there. I enjoyed seeing it in first runs. It was a one-of-a-kind TV show at that time.
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Old 02-07-2018, 08:16 PM #31
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Default Re: Infrared laser pointers?

I found an infrared laser on amazon, it looks like this is AC, though (standard wall plug). I realize its meant for lab/ testing, etc, but thats not what Im going to use it for.

This is the laser...https://www.amazon.com/Focusable-300...MAHA4J03QMG2JT


Doe this look like it would work for my purposes? I think I may need a heatsink as it doesnt look like it has one.

It didnt mention, but a rough estimate, how far would this laser reach?
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Old 02-07-2018, 08:45 PM #32
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Default Re: Infrared laser pointers?

Quote:
Originally Posted by Hemlock_Mike View Post
I always remember that TZ episode --
TO SERVE MAN --- It's a cook book !!!!!!!!!!
HM
I don’t want to step on this IR discussion, but the TZ twist ending was so effective because the alien book’s title was “How to Serve Man”.

-cd
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