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GB2021280A - Testing by holography - Google Patents

Testing by holography

Info

Publication number
GB2021280A
GB2021280A GB7913870A GB7913870A GB2021280A GB 2021280 A GB2021280 A GB 2021280A GB 7913870 A GB7913870 A GB 7913870A GB 7913870 A GB7913870 A GB 7913870A GB 2021280 A GB2021280 A GB 2021280A
Authority
GB
United Kingdom
Prior art keywords
testing
holography
hologrammetric
hologram
mirrors
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.)
Withdrawn
Application number
GB7913870A
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB7913870A priority Critical patent/GB2021280A/en
Publication of GB2021280A publication Critical patent/GB2021280A/en
Withdrawn legal-status Critical Current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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

A method of testing a rigid cellular member (17) (such as a honeycomb sandwich structure used for absorbing noise in gas turbines) in which a hologrammetric representation (19) of a surface (20) of the member is made, and the member is vibrationally excited over a predetermined range of frequencies while the hologram (19) is being formed. The apparatus shown includes a laser (10), beam splitter (13), mirrors (12, 14, 15), lenses (16, 18), and a transducer (28) powered by a unit (29). <IMAGE>
GB7913870A 1978-05-20 1979-04-20 Testing by holography Withdrawn GB2021280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7913870A GB2021280A (en) 1978-05-20 1979-04-20 Testing by holography

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2095078 1978-05-20
GB7913870A GB2021280A (en) 1978-05-20 1979-04-20 Testing by holography

Publications (1)

Publication Number Publication Date
GB2021280A true GB2021280A (en) 1979-11-28

Family

ID=26255003

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7913870A Withdrawn GB2021280A (en) 1978-05-20 1979-04-20 Testing by holography

Country Status (1)

Country Link
GB (1) GB2021280A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2519144A1 (en) * 1981-12-28 1983-07-01 United Technologies Corp HOLOGRAPHIC INSPECTION TECHNIQUE
US9939391B1 (en) 2016-12-15 2018-04-10 Bell Helicopter Textron Inc. Inspection method using a film overlay
US10352906B2 (en) 2016-12-15 2019-07-16 Bell Helicopter Textron Inc. Through-transmission ultrasonic testing apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2519144A1 (en) * 1981-12-28 1983-07-01 United Technologies Corp HOLOGRAPHIC INSPECTION TECHNIQUE
US9939391B1 (en) 2016-12-15 2018-04-10 Bell Helicopter Textron Inc. Inspection method using a film overlay
US10352906B2 (en) 2016-12-15 2019-07-16 Bell Helicopter Textron Inc. Through-transmission ultrasonic testing apparatus

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)