Lens measurement apparatus providing measurements of multiple le

Optics: measuring and testing – Lens or reflective image former testing – For optical transfer function

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356127, G01B 1103

Patent

active

054325960

ABSTRACT:
Lens measurement apparatus provides a holding device for holding a lens to be measured at a designated position, a first index projecting optical system for projecting a first refractive power measuring index onto the lens, a second index projecting optical system for projecting a second radius of curvature measuring index onto the concave surface thereof. A refractive power and a radius of curvature are obtained by arranging a light splitting member on the optical path of the first index luminous flux, or by moving a photoelectric detecting element for detecting each position of the first index and the second index along with the optical axis.

REFERENCES:
patent: 3614214 (1971-10-01), Cornsweet et al.
patent: 3639041 (1972-02-01), Cornsweet
patent: 4410268 (1983-10-01), Tamaki
patent: 4666269 (1987-05-01), Nakamura et al.
patent: 4795250 (1989-01-01), Nakamura et al.

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