Hitachi, Ltd.

Tatsundo Suzuki

Sumio Hosaka

Minoru Nagata

Masakazu Sugaya

Kenichi Mizuishi

Fumio Isshiki

Nobuo Hamamoto

Masahiro Yamaoka

Tadashi Onishi

Yosuke Tyojamori

Masahiro Kageyama

Taizo Kinoshita

Hiroshi Yoshigi

Toru Matsushita

Hisao Tanabe

Yukio Kumagai

Akihiko Ohba

An absolute accuracy in the range from &#xb1;2 nm to &#xb1;1 nm for a displacement measurement value is provided by a laser interferometer displacement measuring system. A fluctuating error component that appears corresponding to the wave cycle of laser light is detected and subtracted from the measurement value while a stage is moving, thereby providing a high accuracy.

Laser interferometer displacement measuring system, exposure apparatus, and electron beam lithography apparatus

An absolute accuracy in the range from &plusmn;2 nm to &plusmn;1 nm for a displacement measurement value is provided by a laser interferometer displacement measuring system. A fluctuating error component that appears corresponding to the wave cycle of laser light is detected and subtracted from the measurement value while a stage is moving, thereby providing a high accuracy.

The video information recording and reproducing apparatus includes an inputting information part for receiving video information, a storing information part, an outputting information part for producing video information, an automatic indexing information part for automatically adding indexes to the inputted video information, a filtering video information part for automatically selecting video information to be stored from the inputting information part, and a controlling part for controlling the above elements, thereby actualizing the free time-shift viewing function, intelligent search function, and automatic video data base generation function.

Video information recording and reproducing apparatus

A radio paging system with voice transfer function for transmitting a voice message input from an ordinary push-button telephone set to a small-sized receive-only unsophisticated radio pager. A paging station is provided to transmit by radio the message from a telephone network to the radio pager as follows: voice information constituting the message is first converted from analog to digital format, compressed, stored in memory, and scrambled by a privacy function part for transmission. The radio pager in turn demodulates the received information, stores it in memory, retrieves a necessary message therefrom as designated, descrambles the designated message from scrambled state, expands the message from compressed state, and outputs the message as an audible output. In this manner, the user carrying the radio pager is able to get the message from the caller without the risk of being tapped by a third party.

Radio paging system with voice transfer function and radio pager

Growing community of inventors

Musashimurayama, Japan

Tatsundo Suzuki