Canon Kabushiki Kaisha

Takahiko Ishiwatari

Mamoru Miyawaki

Hisaaki Kawade

Ryuichi Arai

Masaaki Matsushima

Hiroyoshi Kishi

Yukio Masuda

Nobutoshi Mizusawa

Hitoshi Oda

Mitsuharu Sawamura

Kazuoki Honguu

Masahiko Okunuki

Hiroshi Takagi

Masao Sugata

Kazuaki Ohmi

Hisanori Tsuda

Katsuhiko Takano

Hiroshi Omata

Shigeharu Iijima

Kazuhiko Kikuchi

Eizo Sasamori

Nobutoshi Mizasawa

A tracking error signal detecting apparatus includes a device for supplying an electron beam, a device for applying the electron beam to a tracking pattern formed on a recording medium, and a device for forming a tracking error signal on the basis of a signal produced from the tracking pattern upon application of the electron beam. An information recording-reproducing apparatus includes an applying device having a plurality of electron ray sources, a device for controlling the driving of the plurality of electron ray sources in response to a signal, a device for directing the electron rays from the electron ray sources to a recording medium, and a device for reproducing information from signals produced upon application of the electron rays to the recording medium.

Tracking error signal detecting apparatus using an electron beam and

A luminescing member emits light as a result of application of excitation energy thereto, wherein a luminescing part comprises on ultrafine particle film formed by deposition of ultrafine particles. It is preferred that the ultrafine particles comprises an amorphous A:Ox or an amorphous A:O:H having an A--O--A bond and an A--OH bond, and the element A is at least one element selected from the group consisting of Si, C and Ge.

Luminescing member, process for preparation thereof, and

An electron-beam information exchange apparatus adapted to effect information exchange in incoming light signals and outgoing light signals by utilizing electron beams. The apparatus has a plurality of electron beam generating means for generating electron beams according to the incoming light signals; a plurality of electron beam deflecting means for independently deflecting individual electron beams emitted from the electron beam generating means; and a plurality of electron beam detecting means for reproducing information from the thus-deflected electron beams to generate the outgoing light beams. The electron beam detecting means controls the electron beams so that each of the electron beams is made incident upon a desired one of said electron beam detecting means. Also, the electron beam generating means are semiconductor devices for generating electron beams.

Electron beam information exchange apparatus with converting light

A photoelectron beam converting device including a semiconductor substrate having a p-n junction formed between an n-type region and a p-type region and an opening portion formed on the side of the semiconductor substrate. An electron beam is generated by a light which enters from the opening portion and by a reverse voltage to be applied to the p-n junction.

Photoelectron beam converting device and method of driving the same

In an optical recording medium having an optical recording layer provided on a substrate, a carbide film of a substance selected from among tungsten, boron, molybdenum, hafnium, niobium, titanium, chromium, vanadium, tantalum and silicon is formed on one or each side of the recording layer.

Optical recording medium

This specification discloses a magneto-optical recording medium having an amorphous magnetic alloy film comprising the following composition and having a readily magnetizable axis in a direction perpendicular to the surface of the film:

Magneto-optical recording medium

An optical recording medium having a substrate, an optical recording layer formed on the substrate, and at least one film consisting of a carbide and a nitride and formed on the substrate.

Optical recording medium which includes a corrosion resistant film of a

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Yamato, Japan

Takahiko Ishiwatari