[Laser] Re: Fresnel lenses and dispersal angle

[KY1K]

Ouch!!!!!! Yes, you are correct. Thanks for the correction.

Art

At 02:31 PM 6/16/2005, you wrote:
>KY1K wrote:
>
>>Spherical aberration is the uniformity of the focal length of the lens as 
>>the wavelength of the light is varied.
>
>
>Art, I think you are describing chromatic aberration.
>
>Here is a nice web page on spherical aberration.  It is most definitely 
>_not_ our friend!
>
>http://www.glenbrook.k12.il.us/gbssci/phys/Class/refln/u13l3g.html
>
>-Joe KM1P
>
>_______________________________________________
>Laser mailing list
>Laser at mailman.qth.net
>http://mailman.qth.net/mailman/listinfo/laser
>