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 03-04-2011, 01:57 PM #1
Junior Member
 
Join Date: Mar 2011
Posts: 2
Rep Power: 0
dlkn is on a distinguished road
dlkn dlkn is offline
Junior Member
 
Join Date: Mar 2011
Posts: 2
Rep Power: 0
dlkn is on a distinguished road
Default what optics need for focusing to 10um spot ?

focal length 500mm
Depth of focus >= 2mm
Focal spot 10 Ám

ld from cd-rom 650nm


dlkn is offline   Reply With Quote







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







Old 03-04-2011, 10:00 PM #2
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,141
Rep Power: 9321
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: 9,141
Rep Power: 9321
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: what optics need for focusing to 10um spot ?

There's no way in hell you'll get a 10Ám dot at half a meter. What's this for?
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 03-05-2011, 06:59 AM #3
Junior Member
 
Join Date: Mar 2011
Posts: 2
Rep Power: 0
dlkn is on a distinguished road
dlkn dlkn is offline
Junior Member
 
Join Date: Mar 2011
Posts: 2
Rep Power: 0
dlkn is on a distinguished road
Default Re: what optics need for focusing to 10um spot ?

what the problem ? in cd device spot 1um, i'm need the 10 times worse, ... but in other length/
dlkn is offline   Reply With Quote
Old 03-05-2011, 01:54 PM #4
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,141
Rep Power: 9321
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: 9,141
Rep Power: 9321
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: what optics need for focusing to 10um spot ?

In a CD drive, the focal point is VERY close to the lens. You can't get near that tiny if the point is half a meter away. I'll ask again, what is this for?
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 03-07-2011, 10:53 AM #5
Class 1 Laser
 
Join Date: Oct 2010
Location: Germany
Posts: 80
Rep Power: 9
donprado has a spectacular aura aboutdonprado has a spectacular aura aboutdonprado has a spectacular aura about
donprado donprado is offline
Class 1 Laser
 
Join Date: Oct 2010
Location: Germany
Posts: 80
Rep Power: 9
donprado has a spectacular aura aboutdonprado has a spectacular aura aboutdonprado has a spectacular aura about
Default Re: what optics need for focusing to 10um spot ?

In the Newport Gaussian Beam Tutorial you get all formulas to calculate your optics:

2 w0 = (4 lambda/PI) (F/D)

DOF = (8 lambda/PI) (F/D)^2

So lets check for your numbers: F = 0.5m, lambda = 650nm, 2w0 = 10Ám -> you need a collimated beam of D = 2cm diameter, which is possible with a beam expander (or two lenses, one to expand the beam, one to collimate at the larger diameter).
Unfortunately, with this diameter your resulting DOF will be only about 1mm.

Like Cyparagon, I'm interested in your application. Why do you need exactly these values? Do you have tolerances?
Good luck with your project
donprado is offline   Reply With Quote
Old 03-08-2011, 12:10 PM #6
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: what optics need for focusing to 10um spot ?

This is assuming you have a gaussian beam and the optics have no abberations.
Bluefan is offline   Reply With Quote
Old 03-08-2011, 12:18 PM #7
Class 1 Laser
 
Join Date: Oct 2010
Location: Germany
Posts: 80
Rep Power: 9
donprado has a spectacular aura aboutdonprado has a spectacular aura aboutdonprado has a spectacular aura about
donprado donprado is offline
Class 1 Laser
 
Join Date: Oct 2010
Location: Germany
Posts: 80
Rep Power: 9
donprado has a spectacular aura aboutdonprado has a spectacular aura aboutdonprado has a spectacular aura about
Default Re: what optics need for focusing to 10um spot ?

Quote:
Originally Posted by Bluefan View Post
This is assuming you have a gaussian beam and the optics have no abberations.
Thats right, these formulas base on perfect optics and gaussian beams. But it gives you a VERY good feeling what is possble. In most cases gaussian beams describe laser beams very well.
donprado is offline   Reply With Quote
Old 03-08-2011, 12:25 PM #8
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: what optics need for focusing to 10um spot ?

It definately gives an idea of how it works, but for most lasers the M^2 value is significantly larger than 1.
Bluefan is offline   Reply With Quote
Old 03-19-2011, 10:48 AM #9
yc0 yc0 is offline
Junior Member
 
Join Date: Mar 2011
Location: Belgium
Posts: 3
Rep Power: 0
yc0 is on a distinguished road
yc0 yc0 is offline
Junior Member
 
Join Date: Mar 2011
Location: Belgium
Posts: 3
Rep Power: 0
yc0 is on a distinguished road
Default Re: what optics need for focusing to 10um spot ?

I'm also interested by doing the same (focussing a laser beam to a 10um spot) . The intended application can be found at : This link
How could i define all the parameters of the lenses, needed to perform this ?

THank you very much
yc0 is offline   Reply With Quote
Old 03-19-2011, 01:37 PM #10
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: what optics need for focusing to 10um spot ?

Using the gaussian beam propagation you can determine the focus needed to have a 10um waist. donprado posted the needed equations, but the complete newport acticle is a good read.
This depends on the laser used, your application seems to need a UV laser. You happen to have a UV laser? It's an ambitious project, micrometer precision, large cylindical lenses.
Bluefan is offline   Reply With Quote
Old 03-19-2011, 08:29 PM #11
Class 1 Laser
 
Join Date: Oct 2010
Location: Germany
Posts: 80
Rep Power: 9
donprado has a spectacular aura aboutdonprado has a spectacular aura aboutdonprado has a spectacular aura about
donprado donprado is offline
Class 1 Laser
 
Join Date: Oct 2010
Location: Germany
Posts: 80
Rep Power: 9
donprado has a spectacular aura aboutdonprado has a spectacular aura aboutdonprado has a spectacular aura about
Default Re: what optics need for focusing to 10um spot ?

Wow - a very demanding project. I think precise scanning is more complicated that having the small focus in the right position!
if you get some results with this project!
donprado is offline   Reply With Quote
Old 03-21-2011, 05:51 AM #12
yc0 yc0 is offline
Junior Member
 
Join Date: Mar 2011
Location: Belgium
Posts: 3
Rep Power: 0
yc0 is on a distinguished road
yc0 yc0 is offline
Junior Member
 
Join Date: Mar 2011
Location: Belgium
Posts: 3
Rep Power: 0
yc0 is on a distinguished road
Default Re: what optics need for focusing to 10um spot ?

I'll try with a laser printer scanner head in which I'll change the laser...
yc0 is offline   Reply With Quote
Old 03-21-2011, 12:44 PM #13
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: what optics need for focusing to 10um spot ?

When I saw this printer I thought of your project. Those are probably BK7 lenses (I think the most common optical glass), good down to 350nm. A tripled yag would work. I'm still curious what laser you want to use.
Most laser printers aren't made for a 10um focus, that would be roughly 2500 DPI. But laser printer optics would definately be a good option, and a shorter wavelength means a smaller spot size, so it may work out just fine.
Bluefan is offline   Reply With Quote
Old 03-21-2011, 09:01 PM #14
BShanahan14rulz's Avatar
Class 3B Laser
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 264
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
BShanahan14rulz BShanahan14rulz is offline
Class 3B Laser
BShanahan14rulz's Avatar
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 264
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
Default Re: what optics need for focusing to 10um spot ?

Your findings may vary.

I took apart an old applewriter laser printer, similar era equipment as what was posted in that link. Odd lenses were made of plastic. In fact, from memory, I believe everything was plastic except the raster scanner and the final output mirror, both FS mirrors (one polished metal, one metalized glass)
BShanahan14rulz is offline   Reply With Quote
Old 03-22-2011, 02:05 PM #15
yc0 yc0 is offline
Junior Member
 
Join Date: Mar 2011
Location: Belgium
Posts: 3
Rep Power: 0
yc0 is on a distinguished road
yc0 yc0 is offline
Junior Member
 
Join Date: Mar 2011
Location: Belgium
Posts: 3
Rep Power: 0
yc0 is on a distinguished road
Smile Re: what optics need for focusing to 10um spot ?

The best printer laser head i can find on ebay is a 1200dpi, working with a 780nm laser so with a 405nm it would be twice better ?? I plan to use a 500-600mW laser out of a 12X Blu-Ray disk Writer. I'll post pictures when I receive the laser scanner.

Last edited by yc0; 03-22-2011 at 02:07 PM.
yc0 is offline   Reply With Quote
Old 03-22-2011, 04:39 PM #16
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: what optics need for focusing to 10um spot ?

If the lens system isn't precise enough for 10um spot size the shorter wavelength won't improve the spot size, but I don't know if laser printer are limited by their lens system or by something different. Measuring the spotsize would be necessary.
I have no experienced in making PCB's, is 405nm good enough for the photoresist? Usually some UV lights are used. 405nm won't be attenuated much by plastic lenses, so that would be a problem less.
Bluefan 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 06:08 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