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 > Optics



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



Reply
 
LinkBack Thread Tools Display Modes
Old 08-04-2011, 01:08 PM #1
Junior Member
 
Join Date: Aug 2011
Posts: 2
Rep Power: 0
frankqt is on a distinguished road
frankqt frankqt is offline
Junior Member
 
Join Date: Aug 2011
Posts: 2
Rep Power: 0
frankqt is on a distinguished road
Default Diffraction Grating

Hi All,

For a project of mine I like to get custom make diffraction grating optical element to be built.

I like this optical element to have 3 lines, with 6 degree half angle and 45 degree fan out angle. (i.e. angle between the center and side beams is 6 degrees) and 45 degrees along the line. I can spend a few K to get these parts custom built.

Are there any recommendations as per the companies who provide this type of service? I am building a laser scanner and I like to test this idea (Addition to David type thing)
Thx, Frank


frankqt is offline   Reply With Quote







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







Old 08-04-2011, 02:26 PM #2
Bluefan's Avatar
Class 3R Laser
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Bluefan Bluefan is offline
Class 3R Laser
Bluefan's Avatar
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Default Re: Diffraction Grating

If you have a scanner, why use a diffraction grating?

I don't completely understand what you want, but normal diffraction gratings can't make 3 distinct order (unlesss you just block off the rest, in this case not realistic). You're looking for 3 beams, separated by 6 degrees from eachother. A normal diffraction grating can't do that without many higher orders. You could try informing if it's possible to make a diffraction grating with 3 different periodicities superimposed.

Where does the 45 degree appear? Is this the beam divergence in the axis perpedicular to the line the 3 beams are on? This would make a beam looking something like this: |||
Adding a low periodicity in the other direction of the grating would make a lot of orders, appearing like it's continuous. But a high divergence in one axis is easier to do with a cylindical lens.

If the setup is stationary or doesn't move fast and the scanner can't make the movement, a system of beamsplitters, mirrors and lenses will probably do the same but much cheaper and probably more efficient.
Bluefan is offline   Reply With Quote
Old 08-04-2011, 03:26 PM #3
beam's Avatar
Member
 
Join Date: Aug 2010
Location: Prague, Czech Republic
Posts: 39
Rep Power: 0
beam is on a distinguished road
beam beam is offline
Member
beam's Avatar
 
Join Date: Aug 2010
Location: Prague, Czech Republic
Posts: 39
Rep Power: 0
beam is on a distinguished road
Default Re: Diffraction Grating

Hi,
For design DOEs you can use software, for example like LightTrans - Optical Engineering, Optics Software VirtualLab, Diffractive Optical Elements (DOE) Fabrication: Overview - here is available trial version.
May be it should by usefull for your purpose.
Regards,
B.
__________________
405nm 100mW LP
445nm 1W Spyder III Arctic
473nm 20mW unknown laser pointer
488nm 40mW Spectra Physics 161B-1711 Argon
532nm 5mW LP Z-Bolt since 2003
532nm 80mW LP
532nm 430mW portable
543nm 7mW Coherent He-Ne
589nm 83mW CNI-PGL-III-C
594nm 3mW He-Ne from Sam Goldwasser
632.8nm 5-20mw He-Ne
650nm 5mW LP
650nm 180mW LP
660nm 500mW portable
671nm 150mW CNI-PGL-III-C
808nm 330mW LP
Sam's DIY LPM
Coherent 210 Laser Power Meter

Super-hyper-mega-giga strong laser... interested? Look to ELI - THE EXTREME LIGHT INFRASTRUCTURE
beam is offline   Reply With Quote
Old 08-05-2011, 02:33 AM #4
Junior Member
 
Join Date: Aug 2011
Posts: 2
Rep Power: 0
frankqt is on a distinguished road
frankqt frankqt is offline
Junior Member
 
Join Date: Aug 2011
Posts: 2
Rep Power: 0
frankqt is on a distinguished road
Default Re: Diffraction Grating

Thanks for the answer. Apparently I don't really understand the diffraction optics. However what I am looking for is exactly what you describe however number of lines is not an issue for example, I can use 5 or 7 lines as long as the right most and left most lines are 6 degrees apart from the center one.

I will place this in front of a collimated laser beam (~5mW). The most critical item is that it must have exactly 6 degrees and there should be no lines following that.

I have been looking around for manufacturers and Holoeye is one and I am looking for others.

Thanks,
Frank


Quote:
Originally Posted by Bluefan View Post
If you have a scanner, why use a diffraction grating?

I don't completely understand what you want, but normal diffraction gratings can't make 3 distinct order (unlesss you just block off the rest, in this case not realistic). You're looking for 3 beams, separated by 6 degrees from eachother. A normal diffraction grating can't do that without many higher orders. You could try informing if it's possible to make a diffraction grating with 3 different periodicities superimposed.

Where does the 45 degree appear? Is this the beam divergence in the axis perpedicular to the line the 3 beams are on? This would make a beam looking something like this: |||
Adding a low periodicity in the other direction of the grating would make a lot of orders, appearing like it's continuous. But a high divergence in one axis is easier to do with a cylindical lens.

If the setup is stationary or doesn't move fast and the scanner can't make the movement, a system of beamsplitters, mirrors and lenses will probably do the same but much cheaper and probably more efficient.
frankqt 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 07:39 PM.


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