JPS5992598U

JPS5992598U - Rotation control device

Info

Publication number: JPS5992598U
Application number: JP1982187912U
Authority: JP
Inventors: 山本　真伸
Original assignee: ソニー株式会社
Priority date: 1982-12-11
Filing date: 1982-12-11
Publication date: 1984-06-23

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本出願人により先に提案された回転制御装置の
一例を示す構成図、第２図は第１図に示される回転制御
装置に用いられる回転板を示す平面図、第３図Ａは第２
図に示される回転板の一部拡大平面図、第３図Ｂは第３
図Ａに於けるＢ−Ｂ線断面図、第４図は第１図に示され
る装置に用いられる投光・受光器の一例を示す構成図ミ
第５図は本考案に係る回転制御装置の一例を示す構成図
、第６図は第５図に示される例に用いられる回転板を示
す一部省略平面図、第７図は第６図に示される回転板の
一部拡大平面図、第８図は第５図の例に用いられる投光
・受光器の一例を示す構成図である。図中、３０は回転板、３１は回折格子部、３２゜３３及
び３４は夫々第１、第２及び第３の検出トラック、４０
は投光・常光器、４１はレーザビーム発生器、４２は回
折格子板、４３はビームスプリッタ、４４はコリメータ
レンズ、４５はτ波長板、４６は対物レンズ、４７は光
検出器、５０は切換スイッチ、５２は切換指令部、５３
は位相比較器、５４は基準パルス信号発生器、５５は制
御信号発生器である。３１３２ＢＳ　　　　ゝ３４FIG. 1 is a configuration diagram showing an example of a rotation control device previously proposed by the applicant, FIG. 2 is a plan view showing a rotary plate used in the rotation control device shown in FIG. 1, and FIG. 3A is the second
FIG. 3B is a partially enlarged plan view of the rotating plate shown in the figure.
Fig. 4 is a sectional view taken along the line B-B in Fig. A, Fig. 4 is a configuration diagram showing an example of a light projector/receiver used in the device shown in Fig. 1, and Fig. 5 is a block diagram of a rotation control device according to the present invention. FIG. 6 is a partially omitted plan view showing the rotating plate used in the example shown in FIG. 5; FIG. 7 is a partially enlarged plan view of the rotating plate shown in FIG. 6; FIG. 8 is a configuration diagram showing an example of a light emitter/receiver used in the example of FIG. 5. In the figure, 30 is a rotating plate, 31 is a diffraction grating section, 32, 33 and 34 are first, second and third detection tracks, respectively, and 40
41 is a laser beam generator, 42 is a diffraction grating plate, 43 is a beam splitter, 44 is a collimator lens, 45 is a τ wavelength plate, 46 is an objective lens, 47 is a photodetector, and 50 is a switch switch, 52 is a switching command unit, 53
is a phase comparator, 54 is a reference pulse signal generator, and 55 is a control signal generator. 3132 BSゝ34

Claims

[Scope of utility model registration request]

A rotary plate in which a plurality of detection tracks formed by a plurality of diffraction grating parts arranged in an annular shape at uniform intervals are arranged in a plurality of types with different numbers of the diffraction grating parts, and the rotary plate is mounted on a rotating means. and a light projection device comprising a light source and a diffraction grating that divides the light beam from the light source into a plurality of light beams, and causing the plurality of light beams from the diffraction grating to respectively enter the plurality of types of detection tracks of the rotary plate. and detecting the plurality of types by receiving the plurality of reflected light beams obtained by causing the plurality of light beams to respectively enter the plurality of types of detection tracks of the rotary plate rotated by the rotation means. A light-receiving section formed integrally with a plurality of light-receiving elements arranged so as to obtain an output according to each track, and selectively receiving at least one of the plurality of outputs from the light-receiving section. A rotation control device comprising means for controlling the rotation of the rotation means based on the extracted output.