Idec Izumi Corporation

Ikkan Nishihara

Toshihiro Fujita

Shoji Fujii

Tatsumi Tamon

Takeshi Takao

Akito Okamoto

Koji Inada

Shinichi Tanabe

Masaru Mamiya

Takaaki Douko

Koichi Motomura

Kimiyasu Kurita

Katsuhiro Shoji

In a plastic identifying apparatus ( ), a reference light (L ) and a detecting light (L ), each having a predetermined wavelength, are irradiated to an object to be identified ( ), and the transmitted lights of the reference light (L ) and detecting light (L ) are received. A detecting value expressing the quantity of light received of the detecting light (L ) is divided by a reference value expressing the quantity of light received of the reference light (L ), to obtain a computed value, based on which performed is identification of plastic forming the object to be identified . The wavelength of the reference light (L ) is in a wavelength band (hereat, 1550 nm) in which the light absorptances of all the types of plastics are of the lowest level, and the wavelength of the detecting light (L ) is in a wavelength region (hereat, in the range of 1700 to 1760 run) in which the absorption wavelength bands of many plastics except for PET, such as HDPE, are present.

Apparatus and method for judging plastic

An indicator device is intended to make an indication by illuminating a predetermined indicating surface, and comprises a light source ( ) for emitting a light (L ) of the first wavelength and a fluorescent plate ( ) disposed between the light source and the indicating surface for changing at least part of the light of the first wavelength projected from the light source into a light (L ) of the second wavelength longer than the first wavelength and projecting it towards the indicating surface.

Indicator device and illumination device

Apparatus and method for detecting transparent substances

Growing community of inventors

Osaka, Japan

Ikkan Nishihara