optics for Schmidt-Cassegrain telescope
Datecirca 1943
Inventory Number2007-1-0024
ClassificationTelescope Part
Subject
Maker
Polaroid Corporation
1937-present
Cultural Region
Place of Origin
Dimensions15.5 × 9.8 × 9.8 cm (6 1/8 × 3 7/8 × 3 7/8 in.)
Box: 17.5 × 10.5 × 10.5 cm (6 7/8 × 4 1/8 × 4 1/8 in.)
Box: 17.5 × 10.5 × 10.5 cm (6 7/8 × 4 1/8 × 4 1/8 in.)
Material
DescriptionCylindrical in shape, the design of this 4-inch telescope is based on a spherical primary mirror and a Schmidt corrector plate to correct for spherical aberration. It is also called Cassegrain because it has a convex secondary mirror, a perforated primary mirror, and a final focal plane located behind the primary.
The optics is very good, and protected by a piece of lucite at the end of the optical tube. This telescope was most likely used in conjunction with another instrument or camera.
The optics is very good, and protected by a piece of lucite at the end of the optical tube. This telescope was most likely used in conjunction with another instrument or camera.
In Collection(s)
Signedon telescope: 1450 / Model C3 / Polaroid Corp., / Cambridge, Mass
lower part of storing box, hand-written: SCHMIDT TELESCOPE / POLAROID / 1943 / L. HYDE
Inscribedon a tag: from Byerly 10/13/64
on a tag: Replace Schmidt Jars out of focus. M. Rogers
Perkin-Elmer Company
Date: 1942
Accessories: crates
Object number: 2023-1-0015
James Short
Date: circa 1758
Accessories: dust cap; object glass micrometer (0059)
Object number: 0053
Perkin-Elmer Company
Date: 1942
Accessories: crates
Object number: 2023-1-0015a
Perkin-Elmer Company
Date: 1942
Accessories: crates
Object number: 2023-1-0015b
Dow Chemical Company
Date: circa 1942
Accessories: crate
Object number: 2023-1-0017
Dow Chemical Company
Date: 1942
Object number: 2023-1-0017a
Harvard College Observatory
Date: 1942
Object number: 2023-1-0017b
English
Date: 1715-1720
Accessories: solar filter; lens; awl; dust caps.
Object number: 5002
James Short
Date: circa 1763
Accessories: split object glass micrometer; spare secondary mirror in tin box (0002b).
Object number: 0002
Jean-Baptiste-Charles Gonichon
Date: 1733-1763
Accessories: dust covers for tube and eyepiece
Object number: DW0814
Gaspard Rochette
Date: circa 1785
Accessories: dust cap for eyepiece and tube
Object number: DW0164
