Optics: measuring and testing – Lens or reflective image former testing – For optical transfer function
Patent
1993-06-29
1995-07-11
Limanek, Robert P.
Optics: measuring and testing
Lens or reflective image former testing
For optical transfer function
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.
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patent: 4410268 (1983-10-01), Tamaki
patent: 4666269 (1987-05-01), Nakamura et al.
patent: 4795250 (1989-01-01), Nakamura et al.
Limanek Robert P.
Nidek Co. Ltd.
Williams Alexander Oscar
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