JPS57173703A - Displacement mode judging in holographic interferometry - Google Patents

Displacement mode judging in holographic interferometry

Info

Publication number
JPS57173703A
JPS57173703A JP5855381A JP5855381A JPS57173703A JP S57173703 A JPS57173703 A JP S57173703A JP 5855381 A JP5855381 A JP 5855381A JP 5855381 A JP5855381 A JP 5855381A JP S57173703 A JPS57173703 A JP S57173703A
Authority
JP
Japan
Prior art keywords
reflecting mirror
holograms
light
inputted
mirror
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
JP5855381A
Other languages
Japanese (ja)
Inventor
Hiroshi Oota
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5855381A priority Critical patent/JPS57173703A/en
Publication of JPS57173703A publication Critical patent/JPS57173703A/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
    • G01B9/00—Measuring instruments characterised by the use of optical techniques
    • G01B9/02—Interferometers
    • G01B9/021—Interferometers using holographic techniques

Abstract

PURPOSE:To obtain a dynamic displacement mode in the displacement mode judging in the holographic interferometry, by using holograms which is sequentially formed by utilizing reference light beams by which double images are independently inputted from the different directions. CONSTITUTION:The light from a laser pulse power source 1 is divided into two parts by a half mirror 3 through a reflecting mirror 2. One light is reflected by an object to be measured 6 and inputted to a hologram 7. The other light is inputted to the hologram 7 through reflecting mirrors 4 and 5. In preparing the holograms, the reflecting mirror 4 is rotated in synchronization with the triggering of the laser source 1 by a trigger device 8, the reflecting mirror 5 is moved as shown by 5a-5f, and the independent double exposure images are recorded on the same dry plate 7 in a multiplex mode. The locus of the reflecting mirror 5 is an ellipse whose focuses are the reflecting mirror 4 and the dry plate 7. When such holograms are continuously observed by the regenerated waves from the mirror 5a-5f, the vibration mode can be obtained.
JP5855381A 1981-04-20 1981-04-20 Displacement mode judging in holographic interferometry Pending JPS57173703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5855381A JPS57173703A (en) 1981-04-20 1981-04-20 Displacement mode judging in holographic interferometry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5855381A JPS57173703A (en) 1981-04-20 1981-04-20 Displacement mode judging in holographic interferometry

Publications (1)

Publication Number Publication Date
JPS57173703A true JPS57173703A (en) 1982-10-26

Family

ID=13087642

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5855381A Pending JPS57173703A (en) 1981-04-20 1981-04-20 Displacement mode judging in holographic interferometry

Country Status (1)

Country Link
JP (1) JPS57173703A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4890921A (en) * 1986-08-11 1990-01-02 The Boeing Company Scanning interferometer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4890921A (en) * 1986-08-11 1990-01-02 The Boeing Company Scanning interferometer

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