GB719700A - Method of and apparatus for testing lenses - Google Patents

Method of and apparatus for testing lenses

Info

Publication number
GB719700A
GB719700A GB1166851A GB1166851A GB719700A GB 719700 A GB719700 A GB 719700A GB 1166851 A GB1166851 A GB 1166851A GB 1166851 A GB1166851 A GB 1166851A GB 719700 A GB719700 A GB 719700A
Authority
GB
United Kingdom
Prior art keywords
target
lens
passes
focal plane
light
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.)
Expired
Application number
GB1166851A
Inventor
Edward William Herbert Selwyn
Philip George Powell
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.)
Kodak Ltd
Original Assignee
Kodak 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 Kodak Ltd filed Critical Kodak Ltd
Priority to GB1166851A priority Critical patent/GB719700A/en
Publication of GB719700A publication Critical patent/GB719700A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02—Testing optical properties
    • G01M11/0228—Testing optical properties by measuring refractive power

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

719,700. Optical apparatus. KODAK, Ltd. Aug. 18, 1952 [May 18, 1951], No. 11668/51. Class 97(1) [Also in Group XL(b)] To determine the position of the focal plane of a lens light from an extended source is passed through a test object composed of opaque and transparent portions located approximately at the said plane, passes through the lens and is reflected back therethrough by an axially aligned prismatic member, to form an image of the target, the lens and target being relatively adjusted until the amount of light passing back through the target is a maximum in which position the target is in the focal plane. As shown light from a source 1 passes a lens 3 and illuminates the target 4 whence it passes to the lens 5 under test and is reflected back by a tetrahedral prismatic reflector 6. Light passing back through the target is reflected by a semi transparent mirror 2 for visual observation or measurement by photocell 7. The target 4 may be oscillated axially of the lens 5 the resulting varying current being fed through suitable phase selecting circuits to give an indication of the distance between the mean position of the target and the focal plane of the lens. The method may be used to test the location of an objective in a photographic camera.
GB1166851A 1951-05-18 1951-05-18 Method of and apparatus for testing lenses Expired GB719700A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1166851A GB719700A (en) 1951-05-18 1951-05-18 Method of and apparatus for testing lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1166851A GB719700A (en) 1951-05-18 1951-05-18 Method of and apparatus for testing lenses

Publications (1)

Publication Number Publication Date
GB719700A true GB719700A (en) 1954-12-08

Family

ID=9990492

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1166851A Expired GB719700A (en) 1951-05-18 1951-05-18 Method of and apparatus for testing lenses

Country Status (1)

Country Link
GB (1) GB719700A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2968994A (en) * 1956-04-23 1961-01-24 Polaroid Corp Automatic focusing devices and systems
US2975285A (en) * 1957-02-26 1961-03-14 Fairchild Camera Instr Co Focusing device
US3394630A (en) * 1962-03-30 1968-07-30 Glock Ernst Apparatus and method for testing the quality of photographic objectives
DE3007514A1 (en) * 1980-02-28 1981-09-10 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Testing optical image forming system - using plane mirror to form auto-collimator producing image free of aberration
FR2489195A1 (en) * 1980-09-02 1982-03-05 Amada Co Ltd METHOD AND APPARATUS FOR DETECTING THE FOCUS POSITION IN A LASER PROCESSING APPARATUS
US5280336A (en) * 1991-03-29 1994-01-18 Optikos Corporation Automated radius measurement apparatus
US5416574A (en) * 1991-03-29 1995-05-16 Optikos Corporation Automated optical measurement apparatus
CN113295187A (en) * 2021-05-20 2021-08-24 中科马斯科(江苏)智能科技有限公司 Infinite distance position calibration method and system for optical target simulation system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2968994A (en) * 1956-04-23 1961-01-24 Polaroid Corp Automatic focusing devices and systems
US2975285A (en) * 1957-02-26 1961-03-14 Fairchild Camera Instr Co Focusing device
US3394630A (en) * 1962-03-30 1968-07-30 Glock Ernst Apparatus and method for testing the quality of photographic objectives
DE3007514A1 (en) * 1980-02-28 1981-09-10 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Testing optical image forming system - using plane mirror to form auto-collimator producing image free of aberration
FR2489195A1 (en) * 1980-09-02 1982-03-05 Amada Co Ltd METHOD AND APPARATUS FOR DETECTING THE FOCUS POSITION IN A LASER PROCESSING APPARATUS
US5280336A (en) * 1991-03-29 1994-01-18 Optikos Corporation Automated radius measurement apparatus
US5416574A (en) * 1991-03-29 1995-05-16 Optikos Corporation Automated optical measurement apparatus
CN113295187A (en) * 2021-05-20 2021-08-24 中科马斯科(江苏)智能科技有限公司 Infinite distance position calibration method and system for optical target simulation system

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