Old 02-10-2010, 07:30 AM #1
Junior Member
 
Join Date: Apr 2009
Posts: 10
Rep Power: 0
Chris44448888 is on a distinguished road
Chris44448888 Chris44448888 is offline
Junior Member
 
Join Date: Apr 2009
Posts: 10
Rep Power: 0
Chris44448888 is on a distinguished road
Default RGB Diffraction Grating

Question here - is it possible to have a set of double axis diffraction gratings set so that an RGB laser beam could produce a white light matrix pattern. I know the diffraction gratings would need to be set before the beams are combined. I assume the lines/inch would need to be adjusted for the wavelengths. Would this work?


Chris44448888 is offline   Reply With Quote


















Old 02-10-2010, 04:01 PM #2
sightfx's Avatar
Class 2 Laser
 
Join Date: May 2009
Location: Montana USA /Alberta Canada
Posts: 480
Rep Power: 21
sightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud of
Send a message via Yahoo to sightfx
sightfx sightfx is offline
Class 2 Laser
sightfx's Avatar
 
Join Date: May 2009
Location: Montana USA /Alberta Canada
Posts: 480
Rep Power: 21
sightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud ofsightfx has much to be proud of
Send a message via Yahoo to sightfx
Default Re: RGB Diffraction Grating

Wow, That is a good puzzle for our optics geniuses if I ever heard one.

__________________
FS: White Fusion Laser Mixing Kit
sightfx is offline   Reply With Quote
Old 02-10-2010, 05:39 PM #3
Junior Member
 
Join Date: Apr 2009
Posts: 10
Rep Power: 0
Chris44448888 is on a distinguished road
Chris44448888 Chris44448888 is offline
Junior Member
 
Join Date: Apr 2009
Posts: 10
Rep Power: 0
Chris44448888 is on a distinguished road
Default Re: RGB Diffraction Grating

Any idea who the optics geniuses are??
Chris44448888 is offline   Reply With Quote
Old 02-10-2010, 06:15 PM #4
Cereal Eater
 
Join Date: Dec 2007
Location: Argentina
Posts: 6,333
Rep Power: 9427
nikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond repute
Send a message via MSN to nikokapo
nikokapo nikokapo is offline
Cereal Eater
 
Join Date: Dec 2007
Location: Argentina
Posts: 6,333
Rep Power: 9427
nikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond repute
Send a message via MSN to nikokapo
Default Re: RGB Diffraction Grating

So you'd have to somehow combine the multiple beams coming out of the first grating with a second grating... But if the second optical object is a diffraction grating then it would diffract them again.

It could be done if you managed to get each separated beam and then combine the RGB for each beam. Not easy, not economically viable either, you'd be better off using a laser projector emulating a laser grid with dots.
nikokapo is offline   Reply With Quote
Old 02-10-2010, 06:30 PM #5
Flaminpyro's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: West central Oregon
Posts: 5,462
Rep Power: 26216
Flaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond repute
Flaminpyro Flaminpyro is offline
Class 4 Laser
Flaminpyro's Avatar
 
Join Date: May 2009
Location: West central Oregon
Posts: 5,462
Rep Power: 26216
Flaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond repute
Default Re: RGB Diffraction Grating

Yes I want to know the answer to this one ! is there any more optics geniuses out there
12V12W
__________________
White Fusion Time Machine 445
473nm LRS-0473-KFM-00150-10 158.5mW Lab style
laser used in the making of the latest TRON movie

CNI PGL-III-C-589 125mW
520 in a SH-032
Viasho 532nm 500mW
CNI pen 532nm 84mW
The Violet Pip Squeek 45mW

_____________________________________
LOOKING FOR A HOST WITH PERFECT HEAT SINKING
order your C-88 Cu kit today !


Last edited by Flaminpyro; 02-10-2010 at 06:34 PM.
Flaminpyro is offline   Reply With Quote
Old 02-11-2010, 02:53 AM #6
Junior Member
 
Join Date: Apr 2009
Posts: 10
Rep Power: 0
Chris44448888 is on a distinguished road
Chris44448888 Chris44448888 is offline
Junior Member
 
Join Date: Apr 2009
Posts: 10
Rep Power: 0
Chris44448888 is on a distinguished road
Default Re: RGB Diffraction Grating

I'm pretty sure it just a matter of getting the grating angles correct, but two to calculate them? The beam size and shape would need to be the same also.
Chris44448888 is offline   Reply With Quote
Old 02-11-2010, 06:31 PM #7
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,292
Rep Power: 199036
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,292
Rep Power: 199036
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: RGB Diffraction Grating

Would be far easier to just use a scanner, but assuming you could find a wide enough variety of lines/inch to correct for the differing angles for each wavelength (Probably not possible, but if you could) it should work with 3 diffraction gratings in addition to the two dichros, but one of the dichros may need to be rather large. Here's what I came up with:

Attached Thumbnails
RGB Diffraction Grating-white-diffraction.png  
__________________
A problem well stated is a problem half solved.

Last edited by Cyparagon; 02-11-2010 at 06:35 PM.
Cyparagon is online now   Reply With Quote
Old 02-12-2010, 01:36 AM #8
Junior Member
 
Join Date: Apr 2009
Posts: 10
Rep Power: 0
Chris44448888 is on a distinguished road
Chris44448888 Chris44448888 is offline
Junior Member
 
Join Date: Apr 2009
Posts: 10
Rep Power: 0
Chris44448888 is on a distinguished road
Default Re: RGB Diffraction Grating

Thanks Cyparagon, that's the way I envisioned it. You could focus the diffraction pattern so it was small before it went though the dichros. But how do you figure what the specifications for the grating??
Chris44448888 is offline   Reply With Quote
Old 12-21-2014, 08:09 PM #9
Junior Member
 
Join Date: Nov 2014
Posts: 25
Rep Power: 0
nikosb is on a distinguished road
nikosb nikosb is offline
Junior Member
 
Join Date: Nov 2014
Posts: 25
Rep Power: 0
nikosb is on a distinguished road
Default Re: RGB Diffraction Grating

Quote:
Originally Posted by Cyparagon View Post
Would be far easier to just use a scanner, but assuming you could find a wide enough variety of lines/inch to correct for the differing angles for each wavelength (Probably not possible, but if you could) it should work with 3 diffraction gratings in addition to the two dichros, but one of the dichros may need to be rather large. Here's what I came up with:

In the above example it assumes that the DGs are different for each wavelength to produce the same diffraction angle. What about using exactly the same DG for each wavelength but add a convex or concave lens past the DG that would focus or expand the beam respectively to match the diffraction angle.

Let's take for example the red and green combination only. Let's say green beam would diffract with an angle of 10 degrees. Red beam would diffract with a higher angle, let's say 15 degrees. Using a concave lens after the DG of the green beam would increase the diffraction from 10 degrees to 15 degrees, matching the diffraction angle of the red beam. Or vice versa, use a convex lens after the DG of the red beam to reduce the diffraction angle from 15 to 10 degrees. Would that work?
nikosb is offline   Reply With Quote
Old 01-21-2015, 02:19 AM #10
H2Oxide's Avatar
Class 2M Laser
 
Join Date: Dec 2014
Location: USA, OR
Posts: 978
Rep Power: 36866
H2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond repute
H2Oxide H2Oxide is online now
Class 2M Laser
H2Oxide's Avatar
 
Join Date: Dec 2014
Location: USA, OR
Posts: 978
Rep Power: 36866
H2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond reputeH2Oxide has a reputation beyond repute
Default Re: RGB Diffraction Grating

Wow, that's a necropost if I've ever seen one. But still interesting and relevant.
__________________


It's not denial. I'm just very selective about the reality I accept.
H2Oxide is online now   Reply With Quote
Old 02-09-2015, 04:20 AM #11
Alaskan's Avatar
Super Moderator
 
Join Date: Jan 2014
Location: Great White Frozen North
Posts: 9,130
Rep Power: 1041468
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Alaskan Alaskan is offline
Super Moderator
Alaskan's Avatar
 
Join Date: Jan 2014
Location: Great White Frozen North
Posts: 9,130
Rep Power: 1041468
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Default Re: RGB Diffraction Grating

Holy cow, I struck gold and found what I was looking for with a search, amazing... Now to find the diffraction gratings I can use for this, if anyone can give some pointers, much appreciated.

I found this on google, I don't have to make white, this kind of beam profile is of interest to me too, maybe I can find something fairly inexpensive on ebay to try this out with, recommendations?



http://www.laserfocusworld.com/artic...ttlefield.html
__________________

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.


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

Compare different colors: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3

Last edited by Alaskan; 02-09-2015 at 05:06 AM.
Alaskan is offline   Reply With Quote
Old 02-09-2015, 05:36 AM #12
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,292
Rep Power: 199036
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,292
Rep Power: 199036
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: RGB Diffraction Grating

Quote:
Originally Posted by nikosb View Post
What about using exactly the same DG for each wavelength but add a convex or concave lens past the DG that would focus or expand the beam respectively to match the diffraction angle.
Nope. The lasers' dots would change size as well.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 02-09-2015, 05:47 AM #13
Alaskan's Avatar
Super Moderator
 
Join Date: Jan 2014
Location: Great White Frozen North
Posts: 9,130
Rep Power: 1041468
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Alaskan Alaskan is offline
Super Moderator
Alaskan's Avatar
 
Join Date: Jan 2014
Location: Great White Frozen North
Posts: 9,130
Rep Power: 1041468
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Default Re: RGB Diffraction Grating

Found these on ebay, I wonder if they could be used to do a R,G,B color combiner, not to make white, but to make a tube of colors, as in the photo I linked to?

Newport RGL Diffraction Reflection Grating 1200 L mm Gold Coating Large Area | eBay
__________________

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.


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

Compare different colors: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
Alaskan is offline   Reply With Quote
Old 02-09-2015, 03:23 PM #14
Class 2 Laser
 
Join Date: Jan 2011
Posts: 389
Rep Power: 23302
lazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond repute
lazeristasUVISIR lazeristasUVISIR is offline
Class 2 Laser
 
Join Date: Jan 2011
Posts: 389
Rep Power: 23302
lazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond repute
Default Re: RGB Diffraction Grating

Quote:
Originally Posted by Alaskan View Post
This works because wavelengths are very close to each other. RGB are ~75-100 nm apart. Maybe it is possible to get a special designed (echelette) grating for that. A simple grating will have many diffracted beams.
__________________
L is for Lasers, and they are good for me.
lazeristasUVISIR is offline   Reply With Quote
Old 02-09-2015, 05:38 PM #15
Alaskan's Avatar
Super Moderator
 
Join Date: Jan 2014
Location: Great White Frozen North
Posts: 9,130
Rep Power: 1041468
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Alaskan Alaskan is offline
Super Moderator
Alaskan's Avatar
 
Join Date: Jan 2014
Location: Great White Frozen North
Posts: 9,130
Rep Power: 1041468
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Default Re: RGB Diffraction Grating

LazeristasUVISIR

Now I can see, the artwork represents the three beams as red, green, blue, but the actual beams are 1, 2 and 3 lambda, exact multiples of wavelength making the grating work well. Thank you for pointing out RGB are really so close together, I've known it by the numbers, but never realized how close they really are in terms of nm until you wrote that.

Unless there is a already built made for this application R,G,B grating, I'm out of luck, won't be able to pay for something special, I think. I've been googling and have found some articles on diffraction gratings, it appears they are not very efficient, could loose half of the power using one, it appears. Do you know of any high efficiency gratings which can do more than 80%?

Thanks
__________________

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.


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

Compare different colors: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
Alaskan is offline   Reply With Quote
Old 02-09-2015, 05:57 PM #16
Class 2 Laser
 
Join Date: Jan 2011
Posts: 389
Rep Power: 23302
lazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond repute
lazeristasUVISIR lazeristasUVISIR is offline
Class 2 Laser
 
Join Date: Jan 2011
Posts: 389
Rep Power: 23302
lazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond repute
Default Re: RGB Diffraction Grating

Quote:
Originally Posted by Alaskan View Post
Do you know of any high efficiency gratings which can do more than 80%?
Nope. I've only played with CDs as gratings
__________________
L is for Lasers, and they are good for me.
lazeristasUVISIR 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

























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 10:23 PM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC