Evaluation apparatus and method of optical parts

Details Evaluation apparatus and method of optical parts Evaluation apparatus and method of optical parts

2008-01-01

2008-01-01

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

Lamp beam direction or pattern

C382S141000, C382S172000

Reexamination Certificate

active

11168538

ABSTRACT:
An evaluation apparatus of optical parts has a holder having a frame which can hold a lens fixedly and another lens movably, a chart having a first transmission hole group and a second transmission hole group arranged on circumferences of concentric circles, a light source which irradiates the chart with a luminous flux, a CCD camera for picking up an image of the luminous flux transmitted through the first and second transmission hole groups, a processor, and a driving unit. By using a result picked up by the CCD camera, the processor computes coordinates of a center of each circle, on a circumference of which the luminous flux is imaged, and then it calculates an amount movement for the movably held lens by computing a distance between the respective centers of the circles. The driving unit moves the lens on the basis of this calculated amount of movement.

REFERENCES:
patent: 5453606 (1995-09-01), Hojo
patent: 6636625 (2003-10-01), Nakayama et al.
patent: WO 02/048760 (2002-06-01), None

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