Re: laser pens and photography

[P3D Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Thu, 14 Nov 1996 14:15:06 -0800
>From: P3D Martin Simon <msimon@xxxxxxxxxxxxxxxx>
>.............. quote snipped ...................
>     I have made similar photos to what you describe using both a HeNe
>laser and a 670 nm laser pen.  The film sensitivity was fine in both
>cases.  I recently got a 4 mW 650 nm laser pen from MWK and it is much
>"brighter" to the eye than the 5 mW 670 nm pointer.  Haven't tried it
>with film.  It isn't a very pretty pointer but it is only a few 10's of 
>dollars more (about $58) than the duller 670 nm.  I am sure that 635 nm 
>pointers are brighter still, but they cost about $100 more.  Of course,
>for painting a scene onto film, you can compensate for less brightness
>by scanning slower, or using a more reflective material.
>
>
>Martin Simon   msimon@xxxxxxxxxxxxxxxx    www.physics.ucla.edu/~msimon

I just visited the nearby electronics clearinghouse kind of store and they
have several pointers in stock. From the packaging I gleaned that different
models at different wavelengths were proportionately powered. In one very
small style design they had three models described on the package and were
compared to the more common 670nm pointer. The 660nm was x2, the 650nm was
5x and the 635nm was 10x in brightness comparison. They had the 650 nm in
stock for $49.95 and the standard 670nm in stock at $44.95. The brand was
*Infiniter*. Another model at 670nm offered a flashing feature in a very
stylish pen configuration at $49.95.  (I of course have no affiliation in
any way with this store other than as a customer on occasion.: -)

Larry Berlin

Email: lberlin@xxxxxxxxx
http://www.sonic.net/~lberlin/
http://3dzine.simplenet.com/


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