Radiant energy – Photocells; circuits and apparatus – Signal isolator
Reexamination Certificate
2006-03-21
2008-12-02
Epps, Georgia Y (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Signal isolator
C250S239000, C257S433000
Reexamination Certificate
active
07459711
ABSTRACT:
A light emitting element and a light receiving element are mounted on the upper surface of an insulating substrate to be laterally aligned. A cap including a first hollow portion accommodating the light emitting element, a second hollow portion accommodating the light receiving element, and a connecting portion connecting the first hollow portion and the second hollow portion to each other is provided. The connecting portion is formed with a groove in which an object to be detected is to be placed. The light emitted from the light emitting element passes across the groove to reach the light receiving element. A sealing member made of transparent resin is provided in the first hollow portion to seal the light emitting element. Another sealing member made of transparent resin is provided in the second hollow portion to seal the light receiving element.
REFERENCES:
patent: 5214495 (1993-05-01), Kitanishi
patent: 5436742 (1995-07-01), Tanaka et al.
patent: 6677580 (2004-01-01), Sano et al.
patent: 2005/0056796 (2005-03-01), Takeuchi
patent: 11-274550 (1999-10-01), None
Epps Georgia Y
Hamre Schumann Mueller & Larson P.C.
Ko Tony
Rohm & Co., Ltd.
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