New Japan Radio Co., Ltd.

Seiji Koike

Fumio Takamura

Fumiaki Ohno

To achieve an opto-reflector in which a distance to a detection target is shortened to be able to detect the position of the closer detection target, and thereby contributing to the reduction of the arrangement space. The opto-reflector () includes a plate-shaped substrate (); a light emitting element () and a light receiving element () mounted on the substrate (); light transmitting resin layer () which seals the light emitting element () and the light receiving element (); and a light shielding portion () provided between the light emitting element () and the light receiving element (). The light shielding portion () is formed at a height such that a part of light beam can be directly transferred between the light emitting element () and the light receiving element () via the light transmitting resin layer ().

Opto-reflector

A semiconductor photodetector which can achieve spectral sensitivity characteristics close to relative luminous characteristics at low cost while using a light receiving element of a semiconductor made from such as silicon, has a semiconductor light receiving element having high spectral sensitivity in a wavelength range between approximately 400 nm to 1100 nm and an optical transmitting resin for sealing at least a light receiving surface of the semiconductor light receiving element. The optical transmitting resin is formed by dispersing metal boride micro particles whose particle diameter is not more than approximately 100 nm in a transparent resin and blocks light in wavelengths approximately 700 nm or above.

Growing community of inventors

Fujimino, Japan

Seiji Koike