Clip-on lens target

Details Clip-on lens target Clip-on lens target

1980-06-04

1982-06-15

Rosenberger, R. A.

Optics: measuring and testing

Lens or reflective image former testing

For optical transfer function

356243, G01B 900

Patent

active

043347738

ABSTRACT:
A clip-on lens target (10) is disclosed which is suitable for attachment to an elongated light source, such as a fluorescent light (12). The target (10) is attached to the light source (12) by a series of clamps (20) and has a plurality of accurately sized and spaced holes (18) formed in it. Light shining through the holes (18) creates a standard light pattern which may be photographed by a camera so that photographs taken of the standard light pattern can be analyzed to determine the optical characteristics of the camera making the photographs.

REFERENCES:
patent: 2640392 (1953-06-01), Freeman
patent: 3880525 (1975-04-01), Johnson

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