Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2007-02-13
2007-02-13
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C072S021100
Reexamination Certificate
active
10986563
ABSTRACT:
A light barrier having a light emitter (9) spaced apart from a light receiver (10), the emitter including a light source (12) and transmission optics (13) emitting a substantially parallel light beam11. The light receiver (10) and the light emitter (9) are aligned with each other for focusing the light beam (11) from the light emitter (9) by means of reception optics (15) on a reception element (17) for generating an electrical signal as a function of the light received. A partially reflecting optical boundary surface between the reception optics (15) and the reception element (17), and an alignment plate (18) which includes a light entry opening (19) and a target disk (20), are positioned in front of the reception optics (15) and are used for aligning the light receiver (10) and the light emitter (9).
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Luu Thanh X.
Sick AG
Townsend and Townsend / and Crew LLP
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