Lensmeter for automatically measuring optical characteristic of

Details Lensmeter for automatically measuring optical characteristic of Lensmeter for automatically measuring optical characteristic of

1991-07-10

1993-09-21

Rosenberger, Richard A.

Optics: measuring and testing

Lens or reflective image former testing

Optical center, cylinder axis, or prism measuring or...

356125, G01B 900

Patent

active

052473414

ABSTRACT:
An automatic lensmeter for measuring optical characteristics of a lens to be examined is disclosed. The automatic lensmeter includes a display for displaying thereon an alignment target, first and second calculation devices for converting a shift between the optical center of the lens to be examined and a measurement optical axis into a prism power and a deviation respectively, and device for forming the alignment target at a predetermined position, whereby highly accurate alignment can be attained and accurate marking can be readily obtained.

REFERENCES:
patent: 4534645 (1985-08-01), Nohda
patent: 4641964 (1987-02-01), Mitani et al.
patent: 4779979 (1988-10-01), Iwane
DE-Buch: Pancove, J. I.: Display Devices, Springer Verlage Berlin 1980, S.VII-XII.
Prospekt Topcon Computerized lensmeter CL-1000, der Fa. Topcon Deutschland. 4156 Willich, im DPA eingg. Mar. 26, 1990.

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