Just purchased a laser line pointer

[PhilW]

Same Laser available from here: http://www.dealextreme.com/details.dx/sku.5928

Only $4.30 inc Shipping !

Bought a few items from them including Green Laser Pen (nice toy)

Phil.

[GAWnCA]

Darn!!  And I just ordered off eBay!!  Maybe next time!  Thanks.

Greg

[GAWnCA]

Well, I got mine last night.  At about 12 inches above a surface I can focus the line width down to about 1/64th of an inch.  Now, at what rate of speed is the camera and laser moving across a surface for the scan?

[DavidCousins]

I got mine too.   I didn't measure my line, but 1/64 of an inch is smaller then my laser's line.  I'll measure it tonight.  Maybe I'll get the camera and laser mounts made tonight too. 

[GAWnCA]

I got mine too.   I didn't measure my line, but 1/64 of an inch is smaller then my laser's line.  I'll measure it tonight.  Maybe I'll get the camera and laser mounts made tonight too. 

Just turn the base until you get the thinnest line possible.  The one I got does focus and can get as wide a 1/4"  It is just too cool.  Heck I have to get my machine built before I can mount anything.   

[GAWnCA]

I wish I could find the wall wart on that web site.

[DavidCousins]

I wish I could find the wall wart on that web site.

Item title: Power supply 110-240VAC 3.2VDC 500mA with clips
Web address: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110136388801
Item number: 110136388801
Seller User ID: aixiz_lasers

There are 137 wall warts available according to this web site.  Contact the seller.  Search for this item number on his ebay store. 
Here is the sales contact email.  cmaricle@mfgcn.com

[GAWnCA]

I wish I could find the wall wart on that web site.

Item title: Power supply 110-240VAC 3.2VDC 500mA with clips
Web address: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110136388801
Item number: 110136388801
Seller User ID: aixiz_lasers

There are 137 wall warts available according to this web site.  Contact the seller.  Search for this item number on his ebay store. 
Here is the sales contact email.  cmaricle@mfgcn.com

I bought one from them..  I was just looking on that other web site for maybe a better deal.  Thanks  Now I need to find a good deal on a Web Cam.

[DavidCousins]

..

  Now I need to find a good deal on a Web Cam.

I have a pretty old web cam.  Circa 2000, I'm guessing.   I'm wondering if this old camera is part of my problem.  The frequent crashing and other issues.   Or it could be the Alpha state of the hardware too.   I'm looking forward to the next iteration of Art's software so I can find out. 

[TomHubin]

What's the difference between the 650 nm and the 635 nm line generators?

The human eye sensitivity to 635nm is about twice that of 650nm. This is shown in the data table at

http://heelspurs.com/a/led/tech_details.html

So for a human visual response, all other things being equal, I would choose a 635nm laser.

http://www.fairchildimaging.com/main/documents/CCD133ADataSheetRevA.pdf page 6, lower right corner, shows the spectral response of the Fairchild CCD133 1000 pixel line array. Peak responsivity is in the near infrared at about 780nm. 650nm responsivity is better than 635nm but not by much. This is typical of ccd arrays.

So for a CCD camera response, all other things being equal, I would choose a 650nm laser.

This is fortunate for laser triangulation since longer wavelengths are often easier to manufacture so less expensive.

Tom Hubin
thubin@earthlink.net