Re: [photo-3d] Term "interocular" (was: Unanswered question ....)

[Oliver Dean <3d-image@xxxxxxxxxxxxxx>]

From: Oliver Dean <3d-image@xxxxxxxxxxxxxx>

Excellent correction and clarification!  Thank you, Abram!

Cordially,
Oliver Dean

abram klooswyk wrote:
> 
> From: abram klooswyk <abram.klooswyk@xxxxxx>
> 
> Lincoln [Kamm] wrote (Onelist P3d Digest 8,16 Mar 2000):
> 
> > I asked if Ken could tell me what the interocular distance
> >was going to be on the implosion.  Just in case I didn't get
> >an answer because the word intocular was confusing, it is
> >the distance between the 2 cameras when shooting stereo
> >(stereo means 3-D) images or video.
> ["intocular" a typo meaning "interocular" I suppose]
> 
> Oliver Dean wrote (Onelist P3d Digest 11, 17 Mar 2000):
> >(...) Tony Alderson (...) says that "interocular," strictly
> >speaking, is the distance between two eyes,
> >not two cameras. (an "ocular" is an eye, not a camera lens.)
> >The correct term for stereo separation of camera lenses is
> >usually "interaxial," as I understand it.
> 
> "Ocular" does not mean "eye".
> First it is an adjective meaning something like "depending
> on the eye, of the eyes, for the eyes, at the eyes, etcera.
> But its second meaning is "eyepiece of an optical instrument",
> probably derived from "ocular side lens".
> (Note that eyepiece doesn't mean a piece _of_ the eye).
> 
> Latin "oculus", and before that Greek "oops" (with omega and
> psi), are the origins. "Ocular" is an international term, not
> restricted to English, though small spelling differences
> exist (Okular, oculaire, oculair etc).
> 
> Before stereoscopy and photography there already existed
> telescopes and microscopes. These instruments usually have a
> lens (-system) at the side of the objects, the Objective, and
> a lens (-system) at the eye, the Ocular. In binocular
> instruments, the distance between the oculars is the
> interocular distance (more precise: between the optical
> centres of the oculars).
> 
> Stereoscopes usually have no Objectives, but the lenses at
> the eyes are also called Oculars, so they have an interocular
> distance.
> 
> A stereocamera (or two monocameras) has/have Objectives, the
> distance between them obviously shouldn't be called
> interocular. Since "interobjective" isn't in use, we should
> stick to interaxial, or - better still in my opinion - speak
> of the separation of the taking lenses (their optical centres).
> 
> In eye sciences "interocular distance" is also used for the
> distance between the eyes, but I believe we can avoid
> confusion when we call this the interpupillary distance (ID).
> 
> Abram Klooswyk
> 
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