Re: Stereo in the 1600's ?

[P3D William Carter <wc@xxxxxxxxxxxxxxxxxxx>]

Peter Homer writes:

>"Cherubim De Orleans stereomicroscope still was not a stereoscope even=20
>if it had two objective lenses and the right sort of working distance=20
>as they would have probably been converged onto actual objects rather=20
>than parrallel or even divergent as would be required of a=20
>stereoscope."      I don't get it Peter?

Neil Harrington asks:

>"Maybe I missed something, but the original mention of this 1677=20
>microscope described it, I thought, as a BINOCULAR microscope.  Is=20
>there any real evidence that the inventor had stereo microscopy in mind=20
>when he designed it?"=20

Let me repeat a part of my posting. I thought it clearly established=20
that Cherubin had made a stereo microscope:

Single-Lens Stereoscopic Methodologies.
Dual Optical Paths.

The first application of a single lens stereo system has been tried as=20
early as 1677, by a French philosopher - le Pere Cherubin, of Orleans -=20
a Capuchin friar. And this, fewer than twelve years after the first book=20
on microscopy, Robert Hooke=92s Micrographia (1665). The following is an=20
extract from the description given by Cherubin of his instrument:

=91Some years ago I resolved to effect what I had long before=20
premeditated, to make a microscope to see the smallest objects with the=20
two eyes conjointly: and this project has succeeded even beyond my=20
expectation; with the advantages above the single instrument so=20
extraordinary and so surprising, that every intelligent person to whom I=20
have shown the effect has assured me that inquiring philosophers will be=20
highly pleased with the communication.=92[1], [2]
1. Cherubin. La Vision parfaite, 1677
2. Translation by; J. Hogg.  The Microscope: It=92s History, Construction=
,=20
and Applications, p. 113, 1854

In this, Cherubin establishes both intent to produce a stereo view, and=20
the un-expected result of having such a view.

Also, I have a constructional diagram supposedly taken from Cherubin's=20
'La Vision parfaite', 1677. In it is shown what appears to be a single=20
plano convex objective and two occulars converging on it (raked, as=20
Peter suggested). A simple and practical design for the time, and=20
similar to many dissecting microscopes of today.=20


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                wc@xxxxxxxxxxxx
    37deg 39.09'N x 122deg 29.56'W x 90'MLLW




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