Horiba, Ltd.

Syuji Takada

Toshikazu Ohnishi

Koichi Matsumoto

Masahiko Ishida

Kimio Miyatake

Kazutaka Okamoto

Toshiyuki Kuritani

Takasi Gyobu

Kazuo Nakajiwa

A useful pyroelectric infrared detector capable of cancelling noises and detecting dead angles, and accurately detecting a moving direction of a moving body is provided. Four sensing electrodes having an identical shape, area, and sensitivity are formed on a surface of a pyroelectric member in an L-shaped form, so that they are arranged to differ by 90 degrees in phase, respectively, but are symmetric about a center of rotation. The four sensing electrodes form two pairs of dual detecting elements so that output may be provided from the respective first and second dual elements I and II and be appropriately processed.

Pyroelectric infrared detector with an improved sensing element

A measuring instrument that must transmit predetermined wavelengths of optical radiation has an optical filter assembly that can be conveniently manufactured. The optical filter assembly can be coated to provide optical coatings on either side of the substrate, and a masking layer can be deposited to encompass the peripheral edges of the optical coatings and exposed portions of the substrate to eliminate the problem of optical noise resulting from optical radiation contact with the edges of the coating layers.

Optical filter for measurement of combustion gases and method of

An infrared ray detector assembly for detecting a plurality of components such as hydrocarbons, CO.sub.2 and CO gases includes a housing member having a hollow interior and a portion transmissible to infrared rays and a holder member mounted within the hollow interior and having a plurality of separate compartments. An infrared detector is mounted in each compartment, and an optical filter is mounted over each compartment, abutting adjacent filters to respectively limit the wavelength band to each infrared detector, each optical filter having a substrate of approximately the same material and thickness.

Infrared ray detector with multiple optical filters

A method for fixing a window member having a layer of electrically conductive material to a can of an infrared detector over an incident opening extending through a surface of the can is performed by adhering the window member to the can with a non-conductive adhesive applied between an end surface and a side circumferential surface of the window member and a surface of the casing while leaving a portion of the side circumferential surface, formed by the electrically conductive material layer, partially exposed, masking an opposing end surface of the window member and then covering the result with a thin film of electrically conductive material part of which extends between the exposed side circumferential surface of the electrically conductive material layer of the window member and the surface of the can. Finally, the mask and the portion of the thin film of electrically conductive material covering the mask are removed.

Growing community of inventors

Kyoto, Japan

Syuji Takada