optics for Schmidt-Cassegrain telescope
Date: circa 1943
Inventory Number: 2007-1-0024
Classification: Telescope Part
Subject:
Maker: Polaroid Corporation (1937-present)
Cultural Region:
Place of Origin:
Dimensions:
15.5 × 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.)
Description:
Cylindrical 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
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
on a tag: Replace Schmidt Jars out of focus. M. Rogers