Re: [ATM] Entrance, exit pupils-

[Alexis Cousein <al@sgi.com>]

vladimir sacek wrote:
>> So in essence, would the proper usage of "entrance pupil"
>> be that it is the first optical surface the light strikes,
>> independent of the size or placement of the aperture stop?
> 
> Dominic, David is right. Formally, entrance pupil is the image
> of the aperture stop by the optical element preceding it in the
> optical train (and the exit pupil is the image of the aperture
> stop by the optical element following it). And aperture stop 
> is either a surface, or opening, setting physical boundary to the
> light passing toward the image.

Yes, and I'm wrong. That'll teach me from working from memory instead
of checking my books ;).


-- 
Alexis Cousein                                  al@sgi.com
Senior Systems Engineer/Solutions Architect     SGI/Silicon Graphics
--
<If I have seen further, it is by standing on reference manuals>

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