Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-04-18
2006-04-18
Porta, David (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C340S556000
Reexamination Certificate
active
07030364
ABSTRACT:
Sensor(s) may be such that light-projecting component(s) and light-receiving component(s) are arranged therein. Furthermore, such sensor(s) may be provided with optical path varying means for varying projected light optical path(s) and/or received light optical path(s) so as to physically vary overlapping zone(s) in which the projected light optical path(s) and the received light optical path(s) at least partially overlap. The optical path varying means may carry out adjustment of optical sensitivity by increasing the extent(s) of the overlapping zone(s) when carrying out detection with respect to zone(s) distant from such sensor(s) and/or decreasing the extent(s) of the overlapping zone(s) when carrying out detection with respect to zone(s) proximate to such sensor(s).
REFERENCES:
patent: 4310756 (1982-01-01), Sick
patent: 4652205 (1987-03-01), Ross
Fukuda Kiyofumi
Matsuyama Toshiyasu
Takada Yasuhiro
Ko Tony
Optex Co. Ltd.
Porta David
Wenderoth , Lind & Ponack, L.L.P.
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