Apparatus for automatically measuring the characteristics of an

Details Apparatus for automatically measuring the characteristics of an Apparatus for automatically measuring the characteristics of an

1981-04-24

1983-10-18

Arnold, Bruce Y.

Optics: measuring and testing

Lens or reflective image former testing

For optical transfer function

356125, 356127, G01B 900

Patent

active

044102682

ABSTRACT:
An apparatus for measuring the optical characteristics of an optical system includes a light source, a collimator lens, a mask, a detector, and a circuit for measuring information received from the detector. The light source projects a beam of light through the collimator lens and then through the optical system. The beam of light then passes through the mask, which has a pattern of at least two non-parallel, straight lines on it, and is projected onto the detector. With the information provided to the circuit by the detector the optical characteristics of the optical system are determined. The circuit determines the optical characteristics of the optical system by evaluating changes in the length and gradient angles of the lines projected onto the detector from the mask.

REFERENCES:
patent: 1241612 (1917-10-01), Emerson
patent: 3832066 (1974-08-01), Cornsweet
patent: 3880525 (1975-04-01), Johnson
patent: 4139305 (1979-02-01), Lapornik
patent: 4180325 (1979-12-01), Humphrey
patent: 4281926 (1981-08-01), Cornsweet

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