Low backscatter test method and apparatus

Details Low backscatter test method and apparatus Low backscatter test method and apparatus

2011-06-21

2011-06-21

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S208100

Reexamination Certificate

active

07964834

ABSTRACT:
A compact instrument enables placement of the instrument such that the image of the laser beam, as retro reflected and diffracted, forms outside the tracking field of view. The target source and beam camera can be located at the focus of a Cassegrain objective. Embodiments include shared objective and twin objective design. With a shared objective design, both the beam projector and profiling camera can see the same focal length. A two objective design can use two different focal lengths.

REFERENCES:
patent: 6763196 (2004-07-01), Yafuso

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