Deflection unit

Details Deflection unit Deflection unit

1981-04-07

1984-04-10

Punter, William H.

Optics: measuring and testing

By polarized light examination

With light attenuation

33290, 350287, 356138, 356249, G01B 1126, G01C 100, G01C 934

Patent

active

044418183

ABSTRACT:
A deflection unit on a path parallel to a light beam has a rider, which grips the track of a measuring guide (not shown) and permits a beam component to pass while deflecting a component. A levelling means is provided on a line bisecting the angle between the incoming and the deflected beams in or parallel to their common plane to facilitate remote positional measurements of reference points on a body in order to make measurements more accurate.

REFERENCES:
patent: 161155 (1875-03-01), Ransom
patent: 456086 (1891-07-01), Forwood
patent: 2308206 (1943-01-01), Poland
patent: 2746163 (1956-05-01), Moritz
patent: 3026625 (1962-03-01), Carey, Sr.
patent: 3409993 (1968-11-01), Hansen
patent: 3684380 (1972-08-01), Benchley, Jr.
patent: 3748026 (1973-07-01), Scholdstrom
patent: 3765764 (1973-10-01), Niss
patent: 4277895 (1981-07-01), Wiklund
Keuffel and Esser, "Right Angles with Pocket Instruments", Advertisement from Keuffel and Esser Co.

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