Omnidirectional photodetector
AssigneeSony Corporation
InventorJunichi Kajikuri
Life of this patent
Estimating the term…
Abstract
An omnidirectional photodetector has a prism and a light-detecting device. The prism has a cylindrical columnar body and a conical member disposed on an end of the columnar body and having a cross-sectional area that is progressively smaller toward a tip end of the conical member. The prism is made of a light-transmissive synthetic resin. When the omnidirectional photodetector is in use, the conical member is positioned above the columnar body and has its axis oriented vertically. The conical member has a conical surface as an outer circumferential surface thereof providing a reflecting surface for reflecting a light beam applied from an external source to the conical surface into the columnar body and downwardly toward the lower end of the columnar body.
Claims11
An omnidirectional photodetector comprising:
- a prism having a columnar body and a conical member disposed on an end of said columnar body and having a cross-sectional area that is progressively smaller toward a tip end of said conical member, said conical member having a conical surface as an outer circumferential surface thereof providing a reflecting surface for reflecting a light beam applied from an external source to said conical surface into said columnar body;
- and
- a light-detecting device disposed at an opposite end of said columnar body, for detecting the light beam reflected by said reflecting surface and guided through said columnar body.
An infrared receiver for receiving an infrared radiation beam representing a signal which is modulated with encoded control data, comprising:
- a prism having a columnar body and a conical member disposed on an end of said columnar body and having a cross-sectional area that is progressively smaller toward a tip end of said conical member, said conical member having a conical surface as an outer circumferential surface thereof providing a reflecting surface for reflecting an infrared radiation beam applied from an external source to said conical surface into said columnar body;
- a light-detecting device disposed at an opposite end of said columnar body, for detecting the infrared radiation beam reflected by said reflecting surface and outputting a signal represented by said infrared radiation beam;
- amplifying means for amplifying the signal output from said light-detecting device;
- and
- decoding means for demodulating and decoding the detected signal amplified by said amplifying means, into control data, and outputting the control data.
Dependencies are inferred from the claim text.