JPS5754907A - Focus detector - Google Patents

Focus detector

Info

Publication number
JPS5754907A
JPS5754907A JP13096180A JP13096180A JPS5754907A JP S5754907 A JPS5754907 A JP S5754907A JP 13096180 A JP13096180 A JP 13096180A JP 13096180 A JP13096180 A JP 13096180A JP S5754907 A JPS5754907 A JP S5754907A
Authority
JP
Japan
Prior art keywords
spot
diffraction lattice
focus servo
optical system
focusing
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
JP13096180A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6256576B2 (enrdf_load_stackoverflow
Inventor
Keiichi Yoshizumi
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 JP13096180A priority Critical patent/JPS5754907A/ja
Publication of JPS5754907A publication Critical patent/JPS5754907A/ja
Publication of JPS6256576B2 publication Critical patent/JPS6256576B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
    • G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Optical Recording Or Reproduction (AREA)
JP13096180A 1980-09-19 1980-09-19 Focus detector Granted JPS5754907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13096180A JPS5754907A (en) 1980-09-19 1980-09-19 Focus detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13096180A JPS5754907A (en) 1980-09-19 1980-09-19 Focus detector

Publications (2)

Publication Number Publication Date
JPS5754907A true JPS5754907A (en) 1982-04-01
JPS6256576B2 JPS6256576B2 (enrdf_load_stackoverflow) 1987-11-26

Family

ID=15046670

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13096180A Granted JPS5754907A (en) 1980-09-19 1980-09-19 Focus detector

Country Status (1)

Country Link
JP (1) JPS5754907A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6103194A (en) * 1995-09-12 2000-08-15 Jackson; Richard Apparatus for testing items of metal such as jewelry

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6103194A (en) * 1995-09-12 2000-08-15 Jackson; Richard Apparatus for testing items of metal such as jewelry

Also Published As

Publication number Publication date
JPS6256576B2 (enrdf_load_stackoverflow) 1987-11-26

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