Lens meter

Details Lens meter Lens meter

1975-02-03

1977-07-05

Corbin, John K.

Optics: measuring and testing

Lens or reflective image former testing

Focal length measuring

356127, G01B 900

Patent

active

040336964

ABSTRACT:
A lens meter includes a target, a collimator lens system for forming an image of the target, a member having a reflecting surface facing the collimator lens system, and an indicating plate disposed at the focal point of the collimator lens system, and at a side opposite to the reflecting member relative to collimator lens system. The reflecting member is placed on the optical axis of the collimator lens system at a side opposite to the target relative to the collimator lens system. The reflecting member is movable along the optical axis and the target is placed at the focal point of the collimator lens system. The lens meter may further include a beam splitter for dividing the optical axes into two optical axes. In this case, the target is placed on one of the divided axes and the indicating member is placedon the other divided axis. Further improvement may be attained by providing in a suitable arrangement two polarizing plates and a quarter-wave plate.

REFERENCES:
patent: 1873526 (1932-08-01), Allen
patent: 3323417 (1967-06-01), Grey et al.
Bruning et al.; "A Versatile Laser Interferometer" Applied Optics vol. 9, No. 9, Sept. 1970, pp. 2180-2182.

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