JPS57168137A - Lens meter - Google Patents

Lens meter

Info

Publication number
JPS57168137A
JPS57168137A JP5313681A JP5313681A JPS57168137A JP S57168137 A JPS57168137 A JP S57168137A JP 5313681 A JP5313681 A JP 5313681A JP 5313681 A JP5313681 A JP 5313681A JP S57168137 A JPS57168137 A JP S57168137A
Authority
JP
Japan
Prior art keywords
power
refraction
those
lens
phase differences
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.)
Pending
Application number
JP5313681A
Other languages
Japanese (ja)
Inventor
Masao Noda
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.)
Nikon Corp
Original Assignee
Nikon Corp
Nippon Kogaku KK
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 Nikon Corp, Nippon Kogaku KK filed Critical Nikon Corp
Priority to JP5313681A priority Critical patent/JPS57168137A/en
Publication of JPS57168137A publication Critical patent/JPS57168137A/en
Pending 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

PURPOSE:To make it possible to conduct various measurements instantaneously regarding the power of refraction by providing another pair of light receiving elements in a direction different from the direction of a pair of light receiving elements in a plane that is perpendicular to the optical axis. CONSTITUTION:Considering the case in which a lens 1 that is to be measured is an astigmatic lens, and unless the scanning position of the aperture matches just one of the two focal positions and the direction of the scanning coincides with the direction of the main latitude, there are phase differences among output signals of light elements 25a-25b, 250a-250b for the case of the light flux that is made by emitting either one of prisms 41 and 42. Those four phase differences determine four unknowns of the astigmatic lens that are specified by the directions of main latitudes of each two and the refraction power in those directions. Namely, a stigmatic lens is determined by spherical refraction power S, cylindrical refraction power C and the refaraction power Q of one stigmatic latitude direction theta. Those refraction powers S, C, Q contain four unknowns. Then from those four phase differences they can be derived.
JP5313681A 1981-04-10 1981-04-10 Lens meter Pending JPS57168137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5313681A JPS57168137A (en) 1981-04-10 1981-04-10 Lens meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5313681A JPS57168137A (en) 1981-04-10 1981-04-10 Lens meter

Publications (1)

Publication Number Publication Date
JPS57168137A true JPS57168137A (en) 1982-10-16

Family

ID=12934400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5313681A Pending JPS57168137A (en) 1981-04-10 1981-04-10 Lens meter

Country Status (1)

Country Link
JP (1) JPS57168137A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210722A1 (en) 1985-06-05 1987-02-04 Sun High-Tech Kabushiki Kaisha Apparatus for measuring the refractive power or radius of curvature of an optical system
EP0575031A2 (en) * 1992-04-10 1993-12-22 Metaphase Corporation Automated lensometer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210722A1 (en) 1985-06-05 1987-02-04 Sun High-Tech Kabushiki Kaisha Apparatus for measuring the refractive power or radius of curvature of an optical system
EP0575031A2 (en) * 1992-04-10 1993-12-22 Metaphase Corporation Automated lensometer
EP0575031A3 (en) * 1992-04-10 1995-08-02 Metaphase Corp Automated lensometer.

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