JPS56163408A - Optical type thickness measuring device - Google Patents

Optical type thickness measuring device

Info

Publication number
JPS56163408A
JPS56163408A JP6732880A JP6732880A JPS56163408A JP S56163408 A JPS56163408 A JP S56163408A JP 6732880 A JP6732880 A JP 6732880A JP 6732880 A JP6732880 A JP 6732880A JP S56163408 A JPS56163408 A JP S56163408A
Authority
JP
Japan
Prior art keywords
lens
focused
image
undersurface
transmitted
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
JP6732880A
Other languages
Japanese (ja)
Inventor
Nobuo Oguma
Kenichi Hoshi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP6732880A priority Critical patent/JPS56163408A/en
Publication of JPS56163408A publication Critical patent/JPS56163408A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE:To attain the thickness measurement of a lens to be measured with the lens mounted on a jig by focusing a chart image in the vicinity of the center of curvature of the undersurface of the lens and by observing the focused chart image. CONSTITUTION:The pattern of a chart 3 illuminated by a light source 1 through a lens 2 is transmitted through a half mirror 4, a collimator lens 5 and an objective lens 6 and is focused at the focal point (a') of the lens 6. This image is transmitted through the upper surface of a lens 14 to be examined and is reflected on the undersurface thereof and then focused at the center (a'') of curvature of the undersurface of the lens 14. This image is transmitted through the objective lens 6 and the collimator lens 5, is reflected on the half mirror 4 and is focused on a focusing plate 7. The image focused on the focusing plate 7 is observed through an ocular lens 8. The thickness of the lens 14 can be measured through the adjustment of the respective positions of the objective lens 6 and the ocular lens 8 and the observation of the chart image.
JP6732880A 1980-05-21 1980-05-21 Optical type thickness measuring device Pending JPS56163408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6732880A JPS56163408A (en) 1980-05-21 1980-05-21 Optical type thickness measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6732880A JPS56163408A (en) 1980-05-21 1980-05-21 Optical type thickness measuring device

Publications (1)

Publication Number Publication Date
JPS56163408A true JPS56163408A (en) 1981-12-16

Family

ID=13341839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6732880A Pending JPS56163408A (en) 1980-05-21 1980-05-21 Optical type thickness measuring device

Country Status (1)

Country Link
JP (1) JPS56163408A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0431733A (en) * 1990-05-28 1992-02-03 Naitsu:Kk Method and apparatus for simultaneously measuring base curve and center thickness of contact lens
CN117146678B (en) * 2023-10-27 2024-01-23 四川华体照明科技股份有限公司 LED light source module lens check out test set

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0431733A (en) * 1990-05-28 1992-02-03 Naitsu:Kk Method and apparatus for simultaneously measuring base curve and center thickness of contact lens
CN117146678B (en) * 2023-10-27 2024-01-23 四川华体照明科技股份有限公司 LED light source module lens check out test set

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