Patent ID: 9001330
Filing Date: 2015-04-07
Classification: G01N,G01S

Abstract:
1. An attachment for placement onto an optical sensor or onto a part thereof, wherein the optical sensor having a transmission unit for the transmission of detection light into a detection region; a receiver for receiving light reflected or remitted from the detection region or for receiving light transmitted through the detection region; and an evaluation unit for evaluating the received light, wherein the attachment comprises the following: a housing having an inlet opening for the entry of at least a part of the detection light into the attachment; a test light receiver for receiving detection light incident as test light and for the power measurement of the detection light incident as test light at the test light receiver; a signal outputting device for outputting an output signal correlated with the test light power; an outlet opening for the exit of detection light from the attachment into the detection region, wherein at least the outlet opening has a transparent outlet window; a device for monitoring the window contamination of the outlet window; and a dividing mirror arranged in the optical path between the inlet opening and the outlet opening for decoupling a part beam from the detection light as test light such that the test light is deflected to the test light receiver at least at a point in time.