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 > Laser Measurements



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



Reply
 
LinkBack Thread Tools Display Modes
Old 04-09-2012, 11:32 PM #1
justinjja's Avatar
Class 2M Laser
 
Join Date: Mar 2011
Location: Texas
Posts: 692
Rep Power: 52
justinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond repute
justinjja justinjja is offline
Class 2M Laser
justinjja's Avatar
 
Join Date: Mar 2011
Location: Texas
Posts: 692
Rep Power: 52
justinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond repute
Default High wavelength 445 diode

I have a 445 diode that apears visibly more blue than my other ~10 diodes.
Is there a way i can cheaply measure it.

I asume there is a profesional tool for this too, what is it called?
My school probably has several of them, If I know what they are called,
they might just let me use one


__________________
"V=IR It's not a suggestion it's the law"
-georg simon ohm
justinjja is offline   Reply With Quote







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







Old 04-10-2012, 12:01 AM #2
Banned
 
Join Date: Feb 2012
Posts: 298
Rep Power: 0
lman is a splendid one to beholdlman is a splendid one to beholdlman is a splendid one to beholdlman is a splendid one to beholdlman is a splendid one to beholdlman is a splendid one to beholdlman is a splendid one to behold
lman lman is offline
Banned
 
Join Date: Feb 2012
Posts: 298
Rep Power: 0
lman is a splendid one to beholdlman is a splendid one to beholdlman is a splendid one to beholdlman is a splendid one to beholdlman is a splendid one to beholdlman is a splendid one to beholdlman is a splendid one to behold
Default Re: High wavelength 445 diode

its called a spectrometer and if i remember correctly the more efficent the diode the lower the wavelength not sure though.

Last edited by lman; 04-10-2012 at 12:06 AM.
lman is offline   Reply With Quote
Old 04-10-2012, 12:14 AM #3
InfinitusEquitas's Avatar
Class 4 Laser
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,004
Rep Power: 10341
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
InfinitusEquitas InfinitusEquitas is offline
Class 4 Laser
InfinitusEquitas's Avatar
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,004
Rep Power: 10341
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
Default Re: High wavelength 445 diode

It is called a spectrometer. rhd and cypragon have one afaik.

First it might be worthwhile to just LPM it though. If you're testing all of them in the same manner but get a lower LPM reading, you have a less efficient diode. This isn't uncommon.

Kind of ironic that less efficient diodes work out to be better pointers.
InfinitusEquitas is offline   Reply With Quote
Old 04-10-2012, 01:33 AM #4
Alessandros's Avatar
Class 1M Laser
 
Join Date: Dec 2011
Location: Canada
Posts: 119
Rep Power: 6
Alessandros is on a distinguished road
Alessandros Alessandros is offline
Class 1M Laser
Alessandros's Avatar
 
Join Date: Dec 2011
Location: Canada
Posts: 119
Rep Power: 6
Alessandros is on a distinguished road
Default Re: High wavelength 445 diode

Or, for a smaller cost, buy a diffraction grating on eBay for a few bucks, and check out the info on this thread.
Make your own Laser spectrometer !
Alessandros is offline   Reply With Quote
Old 04-10-2012, 01:53 AM #5
justinjja's Avatar
Class 2M Laser
 
Join Date: Mar 2011
Location: Texas
Posts: 692
Rep Power: 52
justinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond repute
justinjja justinjja is offline
Class 2M Laser
justinjja's Avatar
 
Join Date: Mar 2011
Location: Texas
Posts: 692
Rep Power: 52
justinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond repute
Default Re: High wavelength 445 diode

Quote:
Originally Posted by Alessandros View Post
Or, for a smaller cost, buy a diffraction grating on eBay for a few bucks, and check out the info on this thread.
Make your own Laser spectrometer !
Thats what I was thinking of
__________________
"V=IR It's not a suggestion it's the law"
-georg simon ohm
justinjja is offline   Reply With Quote
Old 04-10-2012, 02:09 AM #6
jakeGT's Avatar
Class 3B Laser
 
Join Date: Oct 2010
Location: Kentucky
Posts: 3,544
Rep Power: 195
jakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond repute
jakeGT jakeGT is offline
Class 3B Laser
jakeGT's Avatar
 
Join Date: Oct 2010
Location: Kentucky
Posts: 3,544
Rep Power: 195
jakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond reputejakeGT has a reputation beyond repute
Default Re: High wavelength 445 diode

Rhds wavelength calculator. Too lazy to post a link
__________________
My Reviews and Threads
jakeGT is offline   Reply With Quote
Old 04-10-2012, 04:06 AM #7
weeba2kv's Avatar
Class 3R Laser
 
Join Date: Sep 2010
Location: The netherlands
Posts: 1,374
Rep Power: 34
weeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond repute
weeba2kv weeba2kv is offline
Class 3R Laser
weeba2kv's Avatar
 
Join Date: Sep 2010
Location: The netherlands
Posts: 1,374
Rep Power: 34
weeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond reputeweeba2kv has a reputation beyond repute
Default Re: High wavelength 445 diode

Pics please
__________________
Working lasers are.
400mw 532nm < dead
cute 5mw 532nm < my cat ate it
200mw 650nm < gave it away
1mw 632.8 nm HeNe
1.2-1.4watt 445nm

COHERENT INNOVA 90-5 GOD's power
MELLES GRIOT HeNe 75 mW max , 632.8 nm ( 38 mW )
weeba2kv is offline   Reply With Quote
Old 04-10-2012, 06:14 AM #8
Fiddy's Avatar
Class 3B Laser
 
Join Date: May 2011
Location: Down Under
Posts: 2,747
Rep Power: 311
Fiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond repute
Fiddy Fiddy is offline
Class 3B Laser
Fiddy's Avatar
 
Join Date: May 2011
Location: Down Under
Posts: 2,747
Rep Power: 311
Fiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond repute
Default Re: High wavelength 445 diode

ye, i was thinking of sizing up a spectrometer, for those who have one, whats a decent unit and/or could you make suggestions?
__________________
405nm - 1,910mW (6)
445nm - 15,895mW (15)
450nm - 370mW (2)
473nm - 110mW (2)
532nm - 1250mW (6)
632.8nm - 2mW (1)
637nm - 5105mW (8)
660nm - 1,850mW (5)
670nm - 600mW (1)
685nm - 40mW (1)
808nm - 2,700mW (3)
RGB - 400mW (1)

In Progress:
405nm - 500mW+ Kryton Groove
445nm - 2,000mW+ C-88
520nm - 50mW Ultrafire RL-118 SS
632.8nm - 0.5mW Mini HeNe

Safety Glasses
2x Eagle Pair OD4+ 190nm-540nm
2x Eagle Pair OD4+ 90-400nm & 580-760nm
OEM Lasers OD 5+ 190-435nm & 730-1085nm

LaserBee 5W Laser Power Meter


>Fiddy's Review/Tutorial/Build Compilation Thread<
>>FS: Custom Glow Rings<<
>>>Plasma Speaker Kits (High Frequency Audio Tesla Coil) reserve yours today!<<<

CajunLasers FTW!
Fiddy is offline   Reply With Quote
Old 04-10-2012, 05:42 PM #9
Meatball's Avatar
Class 3B Laser
 
Join Date: Feb 2008
Location: Lincoln, NE
Posts: 2,989
Rep Power: 242
Meatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond repute
Meatball Meatball is offline
Class 3B Laser
Meatball's Avatar
 
Join Date: Feb 2008
Location: Lincoln, NE
Posts: 2,989
Rep Power: 242
Meatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond repute
Default Re: High wavelength 445 diode

Just shine your high WL diode through a prism parallel to some other 445s, and see where the dots land relative to one another.
__________________
FIAT LUX

(\__/)
(='.'=)
(")_(")
Meatball is offline   Reply With Quote
Old 04-10-2012, 06:12 PM #10
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: High wavelength 445 diode

Quote:
Originally Posted by InfinitusEquitas View Post
First it might be worthwhile to just LPM it though. If you're testing all of them in the same manner but get a lower LPM reading, you have a less efficient diode. This isn't uncommon.
As long as you're truly testing the diode online, and not the diode+driver, so that you can verify that you're feeding each diode the same current.
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 04-10-2012, 06:22 PM #11
InfinitusEquitas's Avatar
Class 4 Laser
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,004
Rep Power: 10341
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
InfinitusEquitas InfinitusEquitas is offline
Class 4 Laser
InfinitusEquitas's Avatar
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,004
Rep Power: 10341
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
Default Re: High wavelength 445 diode

Quote:
Originally Posted by rhd View Post
As long as you're truly testing the diode online, and not the diode+driver, so that you can verify that you're feeding each diode the same current.
That's what I meant, but thanks for reiterating.
InfinitusEquitas is offline   Reply With Quote
Old 04-11-2012, 02:38 AM #12
ARG's Avatar
ARG ARG is offline
Super Moderator
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1994
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
ARG ARG is offline
Super Moderator
ARG's Avatar
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1994
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
Default Re: High wavelength 445 diode

Quote:
Originally Posted by Fiddy View Post
ye, i was thinking of sizing up a spectrometer, for those who have one, whats a decent unit and/or could you make suggestions?
Compact Fiber Coupled CCD Spectrometer Kit (DIY) | eBay

It seems that was everyone has been buying. It's 200$ but I think they charge 600$ for the calibration?
ARG is offline   Reply With Quote
Old 04-17-2012, 02:46 PM #13
Seoul_lasers's Avatar
Class 3R Laser
 
Join Date: Jul 2008
Location: Victoria, British Columbia
Posts: 2,313
Rep Power: 5175
Seoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond repute
Send a message via Skype™ to Seoul_lasers
Seoul_lasers Seoul_lasers is online now
Class 3R Laser
Seoul_lasers's Avatar
 
Join Date: Jul 2008
Location: Victoria, British Columbia
Posts: 2,313
Rep Power: 5175
Seoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond repute
Send a message via Skype™ to Seoul_lasers
Lightbulb Re: High wavelength 445 diode

Quote:
Originally Posted by ARGLaser View Post
Compact Fiber Coupled CCD Spectrometer Kit (DIY) | eBay

It seems that was everyone has been buying. It's 200$ but I think they charge 600$ for the calibration?
The sensor (sony) is the same CCD sensor that is used in Flatbed scanners. It does the job well as it is a horizontal rectangle shaped sensor. looks like another project!
__________________
650nm ~350mW DVD 20x diode RyanSoh3 Class IIIb
650nm ~350mW DVD 22x 3.5mm labby build 2010 Class IIIb
532nm 10mW-15mW DPSS Module IR filtered(S.Korea)RyanSoh3 Class IIIb
450nm CarbonFiber ElectricPlasma build 9mm +6W Class IV
445nm 3.49W pk ~3.15W av. Sinner Cypreus II +DTR 9mm 445nm Class IV
445nm RHD Saber Twins 2.7W ~2.35W pk Class IV
445nm A140 module x2 Maxsink Class IV
405nm Daguin Kryton Groove SO6J 700mW build. Class IV
405nm Olike 560mW-600mW pen sold Scopeguy20
Class IV
337.1nm TEA Nitrogen laser project 2011 Class IIIb
---------------------------------------------------
Die4Drivers 1.3v lab laser/projector driver

Laserbee 3.2W Deluxe LPM
ARGMeter 1.1v
Ophir 20C-A sensor

Peregrine 1.5.0 is working now on MacOSX Yay!!
Seoul_lasers is online now   Reply With Quote
Old 04-17-2012, 08:44 PM #14
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: High wavelength 445 diode

Quote:
Originally Posted by Seoul_lasers View Post
The sensor (sony) is the same CCD sensor that is used in Flatbed scanners. It does the job well as it is a horizontal rectangle shaped sensor. looks like another project!
No, it couldn't be. The sensor in this is like 2 inches wide. The sensor in a flatbed scanner is typically at least 9 inches wide. They're probably both linear CCDs, but I'm inclined to think that this is where the similarities end. Though I think you could still use a linear CCD from a flatbed scanner and just make a really wide spectrometer In fact, if you got a really old scanner, you'd probably have a better change of the circuitry in the scanner itself feeding the data out in an unencoded / raw / easily understood serial cable data format.

EDIT:
I've previously mentioned that I really don't see a DIY or hobby level spectrometer being cost or ability prohibitive. I'm going to echo that sentiment again. There's this, for $15:
http://www.ebay.com/itm/CCD-LINEAR-I...c#ht_734wt_905
Which is actually a pretty high pixel count (I think about 50% higher than the science surplus units). It's not prohibitively difficult to hook up either, even for a hobbyist. This guy used the same CCD:
http://www.youtube.com/watch?v=ut9LfQmaYkU
As well as an actively produced micro-controller that costs about $15:
http://components.arrow.com/part/search/TMS320F28069

I'm not saying that this would be easy, but there are people here with enough experience to pull it off. The big question is hardware. In this case, a small metal box, with a mounted fibre cable attachment, and an internal mirror and diffraction grating that were adjustable, would do it. I would imagine that the adjustable mounts could be re-purposed from the technology that projector guys use for beam combining, and sourcing a diffraction grating shouldn't be too difficult (though the science surplus units seem to use a grating+mirror combined, so that the reflection itself is split, as opposed to having to pass a beam through a grating).

At any rate though there is nothing here ^ that isn't accomplish-able. In the past, I've said that it might not be a money saving endeavor in light of the $200 science surplus models. My perspective had been that we might just be able to create more interesting options at around the same cost. Now, I'm not so sure we couldn't save a bit on price too. Parts wise, you're looking at ~$30 for the CCD and micro processor. Say another $10 for assorted electronics you'd need to run a USB or serial interface. Add $10 for a good metal box and fibre cable adapter. Who knows what optics would cost - the diffraction grating would be the pricey /difficult to source item. But suppose you could do that for $50. That might lead to a $100 component cost. This might be DIY-able for $100 give or take a bit. If it's a DIY unit, then you don't really need "software", other than a method of just capturing a frame once. You could do the math by hand (applying coefficients manually). If someone was going to sell them, they could probably charge ~$300 for a calibrated unit (that's still $200 cheaper than the science surplus calibrated units at $500). They'd make some decent money, have a better product (higher resolution, cooler looking), and maybe also offer USB connectivity, which the science surplus doesn't have.

Idea for any enterprising members with free time this summer

The best part, is that once you calibrate this with 4 known wavelengths, it's actually really easy for end users to verify that the calibrate is still intact, but using a 532. Unlike LPMs where almost nobody really has a "known" power that couldn't ever have changed. With spectrometers, almost everyone does in fact have a stable known wavelength (or two) to test with.
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)


Last edited by rhd; 04-17-2012 at 09:29 PM.
rhd is offline   Reply With Quote
Reply





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 01:55 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