Lens meter

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

Patent

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Details

356127, G01B 900

Patent

active

058446710

ABSTRACT:
A lens meter having a measuring optical system comprises a device for measuring an optical characteristics continuously, a device for introducing the lens to the desired positional relation for a measuring optical axis in the measuring optical system on the basis of the measured data, a device for generating the alignment ending signal when the alignment is achieved to the predetermined standard level, a device for judging whether the measured data is stable within a predetermined permissible range of the variation, and a device for storing the measured data of the lens based on the judgment result. This apparatus further comprises a device for designating which the left or right lens should be measured, a device for generating the signal for reading-and-storing the measured data, a device for storing the measurement result, a device for detecting whether the lens exists on the measuring optical axis, and a device for judging the changing-over of the left or right of the lens. This apparatus further comprises a device for changing-over a mode to measure an additive diopter in the progressive multi focus lens, a device for inputting which the lens is for left or right, a device for detecting a displacement of a measuring position, a device for conducting to a right and left reference axis of the lens, a device for conducting a measuring position closed to the near viewing section from the far viewing section, and a device for displacing the measuring position closed to the near viewing section to the predetermined nose position.

REFERENCES:
patent: 4730924 (1988-03-01), Allard et al.
patent: 4779979 (1988-10-01), Iwane
patent: 4826315 (1989-05-01), Kohayakawa
patent: 5173739 (1992-12-01), Kurachi et al.
patent: 5231460 (1993-07-01), Kohayakawa
patent: 5247341 (1993-09-01), Kurachi et al.
patent: 5349433 (1994-09-01), Iwane
patent: 5379111 (1995-01-01), Kajino et al.
patent: 5521700 (1996-05-01), Kajino et al.

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