Method for measuring a refracting power of an optical system and

Details Method for measuring a refracting power of an optical system and Method for measuring a refracting power of an optical system and

1994-08-19

1995-04-18

Hille, Rolf

Optics: measuring and testing

Lens or reflective image former testing

For optical transfer function

356127, 250233, G01B 1100, G01B 1108

Patent

active

054083117

ABSTRACT:
A method and apparatus for measuring a refracting power of an optical system to be inspected. A beam source generates a luminous flux which passes through the optical system to be inspected. A rotating plate intermittently blocks the beam after passing through the optical system to be inspected. A beam receiving element receives the beam passing through the optical system to be inspected and intermittently blocked by the rotating plate, and outputs a beam reception signal based on the received beam. A rotational position detector detects a rotational position of the rotating plate and outputs a rotational plate detection signal based on the detected rotational position of the rotating plate. Further, a calculating means calculates the refracting power of the optical system to be inspected based on a change quantity from the detected rotational plate detection signal to the detected beam reception signal.

REFERENCES:
patent: 3761179 (1973-09-01), Plummer et al.
patent: 4182572 (1980-01-01), Humphrey
patent: 4199816 (1980-04-01), Humphrey
patent: 4730116 (1988-03-01), Ida et al.
patent: 4973153 (1990-11-01), Yokokura et al.
patent: 5148231 (1992-09-01), Ishiguro et al.
patent: 5267012 (1993-11-01), Sasnett et al.

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