Passive alignment of photodiode active area in three axes...

Details Passive alignment of photodiode active area in three axes... Passive alignment of photodiode active area in three axes...

2007-06-11

2009-02-03

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C250S221000

Reexamination Certificate

active

07485887

ABSTRACT:
A fixturing system and microscope/video camera setup enables an operator to manipulate a photodiode into position optically using known good targets for the X and Y location and using microscope focus/defocus/refocus for locating the active area of the avalanche photodiode exactly at the focal point of the lens.

REFERENCES:
patent: 5998878 (1999-12-01), Johnson

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