[photo-3d] Re: Telestereoscope

["Abram Klooswyk" <abram.klooswyk@xxxxxx>]

John A. Rupkalvis  Oct 22, 2000:
        

>The word "ocular" originally was a medical term applied only 
>to biological eyes, but later was extended to lenses that we 
>look through to differentiate them from lenses or lens 
>elements elsewhere in an optical system.

Indeed originally "ocular lenses" and "objective lenses". 
But "Interocular distance" of course still is used for 
interpupillary distance.

>The telestereoscope was simply an earlier term for what later 
>became known as the binocular telescope, and in my mind is a 
>more descriptive term.

Helmholtz' original telestereoscope indeed is adequately 
described by that term, but "telestereoscope" is since long 
also in use for instruments with only flat mirrors, which 
increase the stereo viewing base without magnification 
(then perceptually of course the reverse is true: lilliputism).

Abram Klooswyk