GB8511866D0 - Measuring instruments - Google Patents

Measuring instruments

Info

Publication number
GB8511866D0
GB8511866D0 GB858511866A GB8511866A GB8511866D0 GB 8511866 D0 GB8511866 D0 GB 8511866D0 GB 858511866 A GB858511866 A GB 858511866A GB 8511866 A GB8511866 A GB 8511866A GB 8511866 D0 GB8511866 D0 GB 8511866D0
Authority
GB
United Kingdom
Prior art keywords
electrical
signal
electrical signals
corresponds
optical
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
GB858511866A
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.)
PA Consulting Services Ltd
Original Assignee
PA Consulting Services 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 PA Consulting Services Ltd filed Critical PA Consulting Services Ltd
Priority to GB858511866A priority Critical patent/GB8511866D0/en
Publication of GB8511866D0 publication Critical patent/GB8511866D0/en
Pending legal-status Critical Current

Links

Abstract

A laser velocimeter for measuring the relative speed of a surface and a source of coherent light directed at the said surface comprising optical and electrical means for generating two electrical signals one of which corresponds to the content of the speckle pattern produced by illumination of the surface by the light circuit means for obtaining a difference signal from the two electrical signals and frequency measuring means for determining the centre frequency of the signal spectrum of the difference signal to generate an electrical signal indicative of the relative velocity of the surface and source. The device can measure length or distance moved by integrating the velocity signal. The optical and electrical means include a grating in the path to one of two detectors or a linear array of photodetectors alternate ones of which are summed, to provide the two electrical signals one of which corresponds to the speckle pattern.
GB858511866A 1985-05-10 1985-05-10 Measuring instruments Pending GB8511866D0 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB858511866A GB8511866D0 (en) 1985-05-10 1985-05-10 Measuring instruments

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB858511866A GB8511866D0 (en) 1985-05-10 1985-05-10 Measuring instruments
AU58688/86A AU5868886A (en) 1985-05-10 1986-05-08 Optical diffraction velocimeter
PCT/GB1986/000246 WO1986006845A1 (en) 1985-05-10 1986-05-08 Optical diffraction velocimeter
EP19860902876 EP0221127A1 (en) 1985-05-10 1986-05-08 Optical diffraction velocimeter
PT82544A PT82544A (en) 1985-05-10 1986-05-08 Approaches to, and related to, measuring instruments

Publications (1)

Publication Number Publication Date
GB8511866D0 true GB8511866D0 (en) 1985-06-19

Family

ID=10578936

Family Applications (1)

Application Number Title Priority Date Filing Date
GB858511866A Pending GB8511866D0 (en) 1985-05-10 1985-05-10 Measuring instruments

Country Status (5)

Country Link
EP (1) EP0221127A1 (en)
AU (1) AU5868886A (en)
GB (1) GB8511866D0 (en)
PT (1) PT82544A (en)
WO (1) WO1986006845A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63317775A (en) * 1987-06-19 1988-12-26 Omron Tateisi Electronics Co Length and speed measuring apparatus
SE9100916L (en) * 1991-03-27 1992-09-28 Nobeltech Electronics Ab laser Detector
US5557395A (en) * 1992-10-27 1996-09-17 Omron Corporation Optical device for measuring speed
EP0926631A3 (en) * 1997-12-21 2000-09-06 Ascom Hasler Mailing Systems AG Measurement of paper speed using laser speckle detection
US6409294B1 (en) 1997-12-21 2002-06-25 Ascom Hasler Mailing Systems Ag Digital postage franking with coherent light velocimetry
US6220686B1 (en) 1998-02-13 2001-04-24 Ascom Hasler Mailing Systems Ag Measurement of paper speed using laser speckle detection
US6424407B1 (en) 1998-03-09 2002-07-23 Otm Technologies Ltd. Optical translation measurement
AU6633798A (en) 1998-03-09 1999-09-27 Gou Lite Ltd. Optical translation measurement
GB0209053D0 (en) 2002-04-22 2002-12-18 Bae Systems Plc Method and apparatus for laser vibrometry
IL174713D0 (en) * 2006-04-02 2007-05-15 Abraham Aharoni System and method for optical sensing of surface motions
US8151646B2 (en) 2008-10-24 2012-04-10 Raytheon Company Differential mode laser detection and ranging device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3432237A (en) * 1964-03-31 1969-03-11 Singer General Precision Velocity measuring device
DE978074C (en) * 1964-06-13 1980-04-17
FR2044366A5 (en) * 1969-05-19 1971-02-19 Schnerb Gilbert
GB1330163A (en) * 1971-04-28 1973-09-12 British Aircraft Corp Ltd Measurement of fluid or surface velocities
GB1356430A (en) * 1971-08-09 1974-06-12 Rank Organisation Ltd Optical elements

Also Published As

Publication number Publication date
EP0221127A1 (en) 1987-05-13
PT82544A (en) 1986-11-28
WO1986006845A1 (en) 1986-11-20
AU5868886A (en) 1986-12-04

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