Test apparatus and test method having a plurality of...

Details Test apparatus and test method having a plurality of... Test apparatus and test method having a plurality of...

2011-01-11

2011-01-11

Pham, Hoa Q (Department: 2886)

Optics: measuring and testing

Lens or reflective image former testing

C356S124500

Reexamination Certificate

active

07869017

ABSTRACT:
One embodiment of the invention provides an test apparatus having a plurality of combinations of object distances and being used for testing an optical device. The test apparatus comprises at least one reflector, at least one first target module and at least one second target module. The first target module is for forming a first patterned light beam being shed on the optical device. The second target module is for forming a second patterned light beam being reflected by the reflector and then shed on the optical device. The third target module is for forming a quasi-parallel third patterned light beam being shed on the optical device. The distance between the first target module and the optical device is smaller than the distance between the second target module and the optical device.

REFERENCES:
patent: 5841525 (1998-11-01), Rosow et al.
patent: 6498642 (2002-12-01), Duckett
patent: 2010/0165329 (2010-07-01), Lee et al.
patent: 274169 (2007-02-01), None
patent: 282900 (2007-06-01), None
patent: 288838 (2007-10-01), None

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