NL7216306A - - Google Patents

Info

Publication number
NL7216306A
NL7216306A NL7216306A NL7216306A NL7216306A NL 7216306 A NL7216306 A NL 7216306A NL 7216306 A NL7216306 A NL 7216306A NL 7216306 A NL7216306 A NL 7216306A NL 7216306 A NL7216306 A NL 7216306A
Authority
NL
Netherlands
Application number
NL7216306A
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 filed Critical
Priority to NL7216306A priority Critical patent/NL7216306A/xx
Priority to ZA00738817A priority patent/ZA738817B/xx
Priority to US418061A priority patent/US3911209A/en
Priority to AU62882/73A priority patent/AU6288273A/en
Priority to GB5517973A priority patent/GB1455460A/en
Priority to DE2359171A priority patent/DE2359171A1/de
Priority to JP48134005A priority patent/JPS4989549A/ja
Priority to FR7342313A priority patent/FR2209460A5/fr
Priority to CH1670473A priority patent/CH567273A5/xx
Priority to BE138344A priority patent/BE808010A/xx
Priority to ES420968A priority patent/ES420968A1/es
Priority to IT31843/73A priority patent/IT1002057B/it
Publication of NL7216306A publication Critical patent/NL7216306A/xx

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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40—Optical focusing aids

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Lenses (AREA)
NL7216306A 1972-12-01 1972-12-01 NL7216306A (xx)

Priority Applications (12)

Application Number Priority Date Filing Date Title
NL7216306A NL7216306A (xx) 1972-12-01 1972-12-01
ZA00738817A ZA738817B (en) 1972-12-01 1973-11-19 Optical system for imaging an object, the focussing being maintained independent of a variation in the distance between the object plane and the image plane
US418061A US3911209A (en) 1972-12-01 1973-11-21 Optical system for imaging an object, the focussing being maintained independent of a variation in the distance between the object plane and the image plane
AU62882/73A AU6288273A (en) 1972-12-01 1973-11-26 Optical imaging system
GB5517973A GB1455460A (en) 1972-12-01 1973-11-28 Optical system
DE2359171A DE2359171A1 (de) 1972-12-01 1973-11-28 Optisches system zur abbildung eines gegenstandes unter beibehaltung der scharfeinstellung, unabhaengig von einer aenderung in dem abstand zwischen der gegenstandsebene und der bildebene
JP48134005A JPS4989549A (xx) 1972-12-01 1973-11-28
FR7342313A FR2209460A5 (xx) 1972-12-01 1973-11-28
CH1670473A CH567273A5 (xx) 1972-12-01 1973-11-28
BE138344A BE808010A (fr) 1972-12-01 1973-11-29 Systeme optique
ES420968A ES420968A1 (es) 1972-12-01 1973-11-29 Sistema optico para formar la imagen de un objeto en un plano.
IT31843/73A IT1002057B (it) 1972-12-01 1973-11-29 Sistema ottico per proittare l im magine di un oggetto su un piano la messa a fuoco essendi matenuta indipendente da qualsiasi variazio ne nella lunghezza del cammino ottico fra il piano dell oggetto e il piano dell immagine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7216306A NL7216306A (xx) 1972-12-01 1972-12-01

Publications (1)

Publication Number Publication Date
NL7216306A true NL7216306A (xx) 1974-06-05

Family

ID=19817456

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7216306A NL7216306A (xx) 1972-12-01 1972-12-01

Country Status (12)

Country Link
US (1) US3911209A (xx)
JP (1) JPS4989549A (xx)
AU (1) AU6288273A (xx)
BE (1) BE808010A (xx)
CH (1) CH567273A5 (xx)
DE (1) DE2359171A1 (xx)
ES (1) ES420968A1 (xx)
FR (1) FR2209460A5 (xx)
GB (1) GB1455460A (xx)
IT (1) IT1002057B (xx)
NL (1) NL7216306A (xx)
ZA (1) ZA738817B (xx)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322838A (en) * 1980-02-11 1982-03-30 Hewlett-Packard Company Dynamic focus adjustment for transmissive or reflective optical disc memory systems
US4376303A (en) * 1980-12-19 1983-03-08 Rca Corporation Quasi-zoom lens optical focus sensor
NL8105579A (nl) * 1981-12-11 1983-07-01 Philips Nv Optisch fokusfoutdetektiestelsel.
US4712887A (en) * 1985-12-20 1987-12-15 Dazar Corporation Optical system for fast access optical data storage device
DE102006012388A1 (de) 2005-10-20 2007-04-26 Carl Zeiss Surgical Gmbh Mikroskopiesystem

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171360A (en) * 1935-12-20 1939-08-29 Barr & Stroud Ltd Telescope observation instrument
US2391430A (en) * 1942-12-02 1945-12-25 Joseph J Macek Camera and projector
US2398276A (en) * 1945-02-05 1946-04-09 Eastman Kodak Co Variable power telescope
US2552238A (en) * 1948-12-09 1951-05-08 Eastman Kodak Co Profile projector and optical comparator
US3419321A (en) * 1966-02-24 1968-12-31 Lear Siegler Inc Laser optical apparatus for cutting holes
US3506329A (en) * 1967-02-23 1970-04-14 Weaver Co W R Telescopic sight with adjustable negative and erector lenses
CH461149A (de) * 1967-05-09 1968-08-15 Conradi G Ag Einrichtung an einer Zeichenmaschine oder einem Koordinatographen zur mindestens angenähert fehlerfreien Auftragung von Punkten, Linien und Symbolen auf eine zur Führungsebene des Arbeitswagens nicht parallele und/oder nicht plane photographische Schicht
US3623790A (en) * 1969-12-31 1971-11-30 Singer General Precision Capacitance controlled automatic focusing system

Also Published As

Publication number Publication date
ZA738817B (en) 1975-06-25
ES420968A1 (es) 1976-04-01
US3911209A (en) 1975-10-07
IT1002057B (it) 1976-05-20
FR2209460A5 (xx) 1974-06-28
BE808010A (fr) 1974-05-29
AU6288273A (en) 1975-05-29
CH567273A5 (xx) 1975-09-30
GB1455460A (en) 1976-11-10
DE2359171A1 (de) 1974-06-06
JPS4989549A (xx) 1974-08-27

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