PHOTODETECTION DEVICE

An optical sensing device (10) includes an optical unit (2) which includes a light projecting portion (20) to project a projected beam (PB) and a light projecting portion (40) to receive a reflected beam (RB), of which footprints (PF, RF) of optical paths overlap, and an accommodating unit (1) which...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KIYONO Mitsuhiro, ONDA Kazuhisa
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES BASIC ELECTRIC ELEMENTS DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE DEVICES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION RELAYS SELECTORS TESTING
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Beschreibung
Zusammenfassung:	An optical sensing device (10) includes an optical unit (2) which includes a light projecting portion (20) to project a projected beam (PB) and a light projecting portion (40) to receive a reflected beam (RB), of which footprints (PF, RF) of optical paths overlap, and an accommodating unit (1) which forms an accommodating chamber (11) accommodating the optical unit (2) therein. The accommodation unit (1) includes: an optical window portion (16) which transmits the projected beam (PB) from the accommodation chamber (10) to the detection area (DA) and transmits the reflected beam (RB) from the detection area (DA) to the accommodation chamber (11); a holding portion (14) which holds the optical window portion (16) from a side of an outer periphery; and an optical partition member (18), in which a reflectance rate to the projected beam (PB) is lower than that of the holding portion (14) on a side of the optical window portion (16) and an absorptance rate to the projected beam (PB) is higher than that of the holding portion (14) on a side of the optical window portion (16), which is arranged to partition between the optical unit (2) and the optical window portion (16).