Optics: measuring and testing – Lens or reflective image former testing – For optical transfer function
Patent
1997-04-08
1998-12-01
Evans, F. L.
Optics: measuring and testing
Lens or reflective image former testing
For optical transfer function
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.
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patent: 5247341 (1993-09-01), Kurachi et al.
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patent: 5379111 (1995-01-01), Kajino et al.
patent: 5521700 (1996-05-01), Kajino et al.
Fujieda Masanao
Kajino Tadashi
Evans F. L.
Nidek Co. Ltd.
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