Pioneer Corporation

Yuichi Mizuuchi

Masayuki Koyama

Masaya Murata

Tsuyoshi Iwano

Takehiko Hayashi

Takashi Nakamura

Ryuichiro Yoshimura

Akio Fukushima

Hidenori Nakagawa

Kenichi Oono

Takashi Nakai

Naoki Yamada

Tomonori Nakada

Hajime Ishizuka

Shinzo Kawakami

Tak Kai

Takehiro Otsuki

Takayuki Yamamoto

Hiroki Yamaguchi

Kouji Harimoto

Kazumasa Nakamura

Eiji Konosu

In an optical disk manufacturable by a conventional recording medium manufacturing method and that is capable of performing recording with an information recording apparatus used to perform recording on conventional recording mediums, and a data recording apparatus for recording contents data, an optical disk has a structure in which a first substrate and a second substrate are bonded together, the first substrate is provided with a recording layer in which contents data is recorded, and the second substrate is provided with a visual information recording layer in which information enabling visual recognition of, for example, the contents of contents data or a title of the contents data is recorded as visual information.

Optical recording medium and data recording device

A laser light source () and a heat-radiating plate () are provided on a pickup base (). The laser light source () irradiates a laser beam to an optical disk (). The heat-radiating plate () has at least one part exposed outside the pickup base (), having a predetermined distance between the heat-radiating plate () and the pickup base (), and radiates heat generated by the laser light source (). The plate () can radiate heat also from a surface opposing the pickup base () and can therefore have a high heat-radiating efficiency.

Pickup device with heat-radiating mechanism

A communication hole () is provided in a pickup base (). A laser light source () is provided at an end of the communication hole (). A grating () is provided at another end of the communication hole (). The communication hole () is provided with a heat radiation path () which connects the inside of the communication hole () with the outside of the pickup base (). Heat generated from the laser light source () is radiated from the heat radiation path ().

Pickup device having a heat-radiation path

Growing community of inventors

Tokorozawa, Japan

Yuichi Mizuuchi