Method and apparatus for improved collection efficiency of...

Details Method and apparatus for improved collection efficiency of... Method and apparatus for improved collection efficiency of...

2006-05-09

2006-05-09

Le, Que T. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Housings

C250S216000

Reexamination Certificate

active

07041964

ABSTRACT:
Speckle based optical navigation is improved by increasing the collection efficiency of the photodetector through the introduction of a lightpipe or reflector technology. For example, the use of elliptical sidewalls and diffraction gratings in conjunction with a lightpipe leads to improvements in collection efficiency.

REFERENCES:
patent: 6628884 (2003-09-01), Duong

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