Lens meter

Details Lens meter Lens meter

1998-06-29

1999-03-23

Pham, Hoa Q.

Optics: measuring and testing

Lens or reflective image former testing

For optical transfer function

356127, G01B 900

Patent

active

058867791

ABSTRACT:
A lens meter comprising light sources for project luminous flux for measurement to a lens to be examined and a light receiving element for detecting the measuring luminous flux passed through the lens to be examined, wherein refractive characteristics of the lens is detected on the basis of the examined data by the light receiving element, the lens meter comprises a measurement target having predetermined patterns, device for moving the target to one of a plurality of arrangement positions on the optical path of the measuring luminous flux, device for selecting one position to which the measurement target is to be moved among a plurality of arrangement positions on the optical path on the basis of the examined data by the light receiving element, device for controlling the target moving device in accordance with the selection by the selecting device.

REFERENCES:
patent: 4033696 (1977-07-01), Nohda
patent: 5173739 (1992-12-01), Kurachi et al.

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