Optical window contamination detecting device for optical...

Details Optical window contamination detecting device for optical... Optical window contamination detecting device for optical...

2007-12-21

2009-10-13

Toatley, Jr., Gregory J (Department: 2877)

Optics: measuring and testing

Inspection of flaws or impurities

Transparent or translucent material

C356S004010

Reexamination Certificate

active

07602485

ABSTRACT:
An optical window contamination detecting device capable of detecting even microscopic contamination on an optical window with a limited number of contamination detecting sensors. The optical window contamination detecting device is used for a scanning type distance measuring apparatus that includes a casing, formed with an optical window, which accommodates a light transmitting unit, a scanning mechanism for deflection scanning measurement light output from the light transmitting unit into a measuring space through the optical window, and a light receiving unit for detecting reflected light from an object through the optical window. The optical window contamination detecting device includes a plurality of reflection photoelectric sensors arranged along the optical window on an outer side of the optical window and a retro-reflective member attached to the scanning mechanism, the retro-reflective member for reflecting detection light from the reflection photoelectric sensor having passed through the optical window towards the reflection photoelectric sensor.

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Notification of Reasons for Refusal dated Nov. 19, 2007.
European Search Report issued in EP 07124119.4, Dec. 30, 2008, 7 pages.

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