Patent ID: 9541445
Date: 2017-01-10
CPC Classifications: B41J,G01F

Claim:
1. An optical sensor for detecting a presence and an absence of reflective fluid comprising: a housing having at least one wall that encloses a volume and the at least one wall has a first end and a second end; a base configured to close the first end of the at least one wall of the housing; a photoemitter positioned in the base; a photodetector positioned in the base; and a prism configured to close the second end of the at least one wall of the housing, the prism having no sloped surfaces, at least one surface of the prism is parallel to the second end of the at least one wall of the housing, and the at least one surface of the prism has a width approximately equal to a width of the second end of the at least one wall of the housing to enable the photodetector to generate a signal indicative of whether a reflective fluid is contacting the prism.