Matsushita Electric Industrial Co., Ltd.

Yuji Hashidate

Takashi Mori

Yasuyuki Morita

Koichi Kawata

Shinichiro Aoki

Akitoshi Mori

Tatsuki Tsukada

Yoshikazu Yoshida

Hiroshi Ogura

Hiroyoshi Yajima

A method of machining a glass substrate by using a laser, in which a low-permittivity, low-dielectric-loss glass substrate capable of coping with mass production processes is made applicable as the substrate of a high-frequency circuit intended for microwave and millimeter-wave bands in particular. For that purpose, a glass substrate is provided in which the amount of air bubbles in glass is arbitrarily controlled to improve the workability of the substrate itself. Then, the glass substrate is machined while being irradiated with a pulsed laser for a plurality of times, thereby improving the machining shape of the glass substrate. Since glass substrates which are typically difficult to machine can be easily applied to the fabrication of high-frequency circuits, it becomes possible to supply high-performance circuits and apparatuses widely to the public.

Method of machining glass substrate and method fabricating high-frequency circuit

A color separation optical system includes a set of prisms which separate incident light into components having different wavelengths. Image pickup devices may be exposed to the separated light components. An arrangement prevents or reduces the influence of a temperature variation upon color separation characteristics. The color separation optical system may be manufactured in a new way.

Color separation optical system and method of manufacturing the same

A color separation optical system includes a set of prisms which separate incident light into components having different wavelengths. Image pickup devices may be exposed to the separated light components. An arrangement prevents or reduces the influence of a temperature variation upon color separation characteristics. The color separation optical system maybe manufactured in a new way.

Color separation optical system which utilizes glass frit for bonding

Growing community of inventors

Tokyo, Japan

Yuji Hashidate