Method and apparatus for testing lenses

Details Method and apparatus for testing lenses Method and apparatus for testing lenses

1983-07-01

1985-10-08

Rosenberger, R. A.

Optics: measuring and testing

Lens or reflective image former testing

For optical transfer function

356239, 356389, 356394, G01B 900

Patent

active

045456780

ABSTRACT:
The invention concerns a method and apparatus for testing aspherical lenses, particularly continuous-focus eyeglass lenses. The negative picture (7) of a test pattern (1) is produced by means of a master lens (4) which is placed in the ray path of the optical system (6) of the testing device. (FIG. 1). Thereupon the negative picture is projected back onto the test pattern over said ray path, which is now traversed in the opposite direction. If the specimen to be tested is now substituted for the master lens, light edges appear in the plane of the test pattern and give information as to the deviations of the distribution of the refractive power of the test specimen from the desired values of the master lens.

REFERENCES:
patent: 3713741 (1973-01-01), Sheehan
patent: 3723010 (1973-03-01), McCrickered et al.
patent: 3976383 (1976-08-01), Olsen
patent: 4310242 (1982-01-01), Genco et al.
patent: 4386849 (1983-06-01), Haeusler et al.
patent: 4461570 (1984-07-01), Task et al.

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