JPS55125417A - Photodetector - Google Patents

Photodetector

Info

Publication number
JPS55125417A
JPS55125417A JP3268179A JP3268179A JPS55125417A JP S55125417 A JPS55125417 A JP S55125417A JP 3268179 A JP3268179 A JP 3268179A JP 3268179 A JP3268179 A JP 3268179A JP S55125417 A JPS55125417 A JP S55125417A
Authority
JP
Japan
Prior art keywords
mirror
detector
parts
cycle
lenses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3268179A
Other languages
Japanese (ja)
Other versions
JPS6155047B2 (en
Inventor
Toru Nakamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP3268179A priority Critical patent/JPS55125417A/en
Publication of JPS55125417A publication Critical patent/JPS55125417A/en
Publication of JPS6155047B2 publication Critical patent/JPS6155047B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To obtain a device capable of detecting informational, tracking and focusing signals, respectively, by a single photodeterctor from the light receiving surfaces divided into two parts in a concentric cycle state and into four parts by dividing lines passing through the center of a cycle. CONSTITUTION:Return light reflected from the information recorded surface 6 of an optical type information recording and/or reproducing device is separated through lenses 5 and 7 and a mirror 4. The point G of mirror 3 is image-formed on a point G''' from lenses 5 and 7. When a detector 1 is put on this position, a spot of a suitable size is formed. Here, the detector 1 is divided into four parts, A, B, C and D by the concentric cycle and dividing line, and generates a signal corresponding to the quantity of light irradiation, (A+D)-(B+C) represents defocusing, and the lens 5 is moved in the direction shown by Y to realize focusing. (A+B)- (C+D) represents a tracking signal, and the mirror 3 is rotated and followed up. (A+B+C+D) represents the information signal ot the total light quantity. By this organization, three signals can be obtained by one detector, and the regulation thereof is simple.
JP3268179A 1979-03-20 1979-03-20 Photodetector Granted JPS55125417A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3268179A JPS55125417A (en) 1979-03-20 1979-03-20 Photodetector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3268179A JPS55125417A (en) 1979-03-20 1979-03-20 Photodetector

Publications (2)

Publication Number Publication Date
JPS55125417A true JPS55125417A (en) 1980-09-27
JPS6155047B2 JPS6155047B2 (en) 1986-11-26

Family

ID=12365608

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3268179A Granted JPS55125417A (en) 1979-03-20 1979-03-20 Photodetector

Country Status (1)

Country Link
JP (1) JPS55125417A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5827027A (en) * 1981-08-11 1983-02-17 Akai Electric Co Ltd Photo detector
FR2541029A1 (en) * 1983-02-15 1984-08-17 Pioneer Electronic Corp APPARATUS FOR OPTICALLY READING INFORMATION
EP0127845A2 (en) * 1983-05-28 1984-12-12 Kabushiki Kaisha Toshiba System for focusing a light beam on a light reflecting surface
US7240415B2 (en) 2004-06-23 2007-07-10 Dario Toncelli Machine for processing material in the form of slabs, in particular natural stone material, ceramic material and conglomerate
US7748373B2 (en) 2004-10-20 2010-07-06 Dario Toncelli Combined apparatus for machining of articles, in particular in form of slabs
US10201914B2 (en) 2015-01-20 2019-02-12 Park Industries, Inc. Material loading apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63176651A (en) * 1987-01-14 1988-07-20 Shigenobu Fujimoto Dissociation device for particle
JPS6456955A (en) * 1987-08-27 1989-03-03 Shigeru Sato Fuel consumption improving device
JPH01116275A (en) * 1987-10-28 1989-05-09 Kenji Yakura Fuel processing method and its fuel processing device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5827027A (en) * 1981-08-11 1983-02-17 Akai Electric Co Ltd Photo detector
FR2541029A1 (en) * 1983-02-15 1984-08-17 Pioneer Electronic Corp APPARATUS FOR OPTICALLY READING INFORMATION
JPS59125727U (en) * 1983-02-15 1984-08-24 パイオニア株式会社 Optical information pickup device
JPH0320911Y2 (en) * 1983-02-15 1991-05-07
EP0127845A2 (en) * 1983-05-28 1984-12-12 Kabushiki Kaisha Toshiba System for focusing a light beam on a light reflecting surface
US7240415B2 (en) 2004-06-23 2007-07-10 Dario Toncelli Machine for processing material in the form of slabs, in particular natural stone material, ceramic material and conglomerate
US7748373B2 (en) 2004-10-20 2010-07-06 Dario Toncelli Combined apparatus for machining of articles, in particular in form of slabs
US8365715B2 (en) 2004-10-20 2013-02-05 Dario Toncelli Combined apparatus for machining of articles in particular in form of slabs
US10201914B2 (en) 2015-01-20 2019-02-12 Park Industries, Inc. Material loading apparatus
US11446843B2 (en) 2015-01-20 2022-09-20 Park Industries, Inc. Material loading apparatus

Also Published As

Publication number Publication date
JPS6155047B2 (en) 1986-11-26

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