Seiko Instruments & Electronics Ltd.

Seiko Seiki Kabushiki Kaisha

Seiko Instruments Inc

Ikuo Nanno

Seiji Hoshi

Hiroyoshi Yamamoto

Hideo Hoshi

Atsunobu Nakajima

Akira Tsugita

Toyoaki Uchida

Shigeru Inagaki

Chikara Miyata

Masaharu Kamo

Shinji Wakui

Zinichiro Oshima

Kiyoshi Uchiyama

Seitaro Takahashi

Yasuhiro Nomoto

Yasuaki Morimoto

An reaction vessel utilizes a sample carrier composed of a magnetic core and a surface coating effective to support sample of protein or peptide. The sample carrier is floated magnetically and positioned within a reaction chamber. Edman reagent is applied to the sample to effect amino acid sequence analysis of protein or peptide from amino-terminal. By such construction, reaction efficiency is increased to produce sequentially thiazolinon amino-acid derivatives to thereby increase number of identified remaining amino acids, thereby enabling microanalysis of sample.

Reaction vessel

A transferring apparatus comprises a vacuum chamber, a carrier member disposed inside a pipe which communicates with the vacuum chamber, magnetic means installed in a support structure which is moved by a driving means. The carrier member is floated and pulled in its axial direction by magnetic force produced by the magnetic means, whereby an object placed on the tip of a manipulator arm which is connected to the carrier member is transferred in the vacuum chamber. Since the carrier member is floated inside the pipe and moved in its axial direction without contact to the pipe or any other parts, there are no portions inside the pipe which relatively move in contact with each other, and thus fine particles are not generated inside the pipe. This effectively eliminates adhesion of fine particles to objects such as semiconductor devices being transferred in a vacuum chamber.

Transferring apparatus operated in a vacuum chamber

An apparatus actuates an objective lens in axial and circumferential directions through annular magnetic gaps which are formed by yokes and a magnet. In order to retain the objective lens in the neutral position in the circumferential direction, two or four magnetic pieces are mounted on a lens mount and disposed near the circumferetial ends of the annular magnetic gaps in which the force caused by the magnetic potential energy in the magnetic gaps acts on the magnetic pieces to pull them back in the direction of the magnetic gaps so that a magnetic spring for retaining the objective lens at the neutral position is formed by the magnetic pieces.

Apparatus for actuating objective lens

An axially focusable objective lens is retained in a neutral position in the axial focusing direction by means of at leaast one magnetic member disposed inside or near the ends of magnetic gaps formed by yokes and magnets. The magnetic member is mounted on the periphery of a retaining tube which carries the objective lens and is positioned in the magnetic gaps which exhibit a non-uniform magnetic field distribution so that the magnetic member is subjected to a force acting in a direction in which the potential energy becomes stable. This force is utilized as a magnetic spring in the axial focusing direction. The magnetic spring requires no additional space thereby enabling a reduction in the size of the actuator and achieving excellent temperature characteristics.

An objective lens apparatus for an optical disc player comprises an objective lens holder rotatable about a center axis, an objective lens carried by the holder at a location spaced from the center axis, an optical member, a magnetic flux generating member for generating magnetic flux, and tracking and focusing coils interacting with the magnetic flux for effecting tracking and focusing adjustments of the objective lens. The optical member rotates simultaneously with the lens holder and leads light which is incident along the center axis to the objective lens in a direction parallel to the center axis thereby eliminating optical modulation of the light caused by rotation of the lens holder in the tracking direction.

Objective lens apparatus

Growing community of inventors

Tokyo, Japan

Ikuo Nanno