JPS57138616A - Optical correlation processing device - Google Patents

Optical correlation processing device

Info

Publication number
JPS57138616A
JPS57138616A JP2392581A JP2392581A JPS57138616A JP S57138616 A JPS57138616 A JP S57138616A JP 2392581 A JP2392581 A JP 2392581A JP 2392581 A JP2392581 A JP 2392581A JP S57138616 A JPS57138616 A JP S57138616A
Authority
JP
Japan
Prior art keywords
picture
joint
processing device
coherent
correlation processing
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
JP2392581A
Other languages
Japanese (ja)
Inventor
Kumio Kasahara
Takashi Ito
Tomoyuki Nakaguchi
Tomomasa Kondo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2392581A priority Critical patent/JPS57138616A/en
Publication of JPS57138616A publication Critical patent/JPS57138616A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06E—OPTICAL COMPUTING DEVICES; COMPUTING DEVICES USING OTHER RADIATIONS WITH SIMILAR PROPERTIES
    • G06E3/00—Devices not provided for in group G06E1/00, e.g. for processing analogue or hybrid data
    • G06E3/001—Analogue devices in which mathematical operations are carried out with the aid of optical or electro-optical elements
    • G06E3/003—Analogue devices in which mathematical operations are carried out with the aid of optical or electro-optical elements forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions

Abstract

PURPOSE:To obtain an optical correlation processing device where a hologram storage element is unnecessary, by constituting a joint conversion type correlator based on the joint Fourier conversion pattern of a reference picture including a required target and the coherent picture of a picture to be correlated. CONSTITUTION:The picture from a coherent picture input device 15 which supplies a reference picture 13 including a required target 12 and a newly inputted picture 14 to be correlated to a processing system adjacently to each other becomes a joint Fiurier pattern by a Fourier conversion lens 8 and is stored in an optical plane image storage element 16 such as a liquid crystal as a voltage distribution. Its stored contents are read out as a light intensity distribution through a photodetector 7 based on the rotation of the polarization axis corresponding to the voltage distribution by the electrooptic effect due to the reflection from the reflective film of the element 16 corresponding to the incidence of a linearly polarized luminous flux due to a coherent light source 4, a collimator lens 5, a beam splitter 6, etc. Thus, an optical correlation processing device is obtained which determines two-dimensional coefficients of correlation easily and surely in real time without the hologram by a reverse Fourier conversion lens 10.
JP2392581A 1981-02-20 1981-02-20 Optical correlation processing device Pending JPS57138616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2392581A JPS57138616A (en) 1981-02-20 1981-02-20 Optical correlation processing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2392581A JPS57138616A (en) 1981-02-20 1981-02-20 Optical correlation processing device

Publications (1)

Publication Number Publication Date
JPS57138616A true JPS57138616A (en) 1982-08-27

Family

ID=12124096

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2392581A Pending JPS57138616A (en) 1981-02-20 1981-02-20 Optical correlation processing device

Country Status (1)

Country Link
JP (1) JPS57138616A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6031677A (en) * 1983-08-02 1985-02-18 Hamamatsu Photonics Kk Device for optically calculating correlation
EP0152186A2 (en) * 1984-02-07 1985-08-21 Stc Plc Optical correlator
JPH0220823A (en) * 1988-07-08 1990-01-24 Agency Of Ind Science & Technol Method and device for optical space phase modulation
EP0359468A2 (en) * 1988-09-07 1990-03-21 Seiko Instruments Inc. Optical correlator and method of optical correlation
EP0403305A2 (en) 1989-06-16 1990-12-19 Seiko Instruments Inc. Optical pattern recognition apparatus
US5493444A (en) * 1994-04-28 1996-02-20 The United States Of America As Represented By The Secretary Of The Air Force Photorefractive two-beam coupling nonlinear joint transform correlator
US5598485A (en) * 1992-12-04 1997-01-28 Hamamatsu Photonics K.K. Apparatus for performing a joint fourier tranform utilizing apertures of low correlation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53142257A (en) * 1977-05-17 1978-12-11 Canon Inc Coherent luminous flux modulating method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53142257A (en) * 1977-05-17 1978-12-11 Canon Inc Coherent luminous flux modulating method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6031677A (en) * 1983-08-02 1985-02-18 Hamamatsu Photonics Kk Device for optically calculating correlation
JPH0366686B2 (en) * 1983-08-02 1991-10-18 Hamamatsu Photonics Kk
EP0152186A2 (en) * 1984-02-07 1985-08-21 Stc Plc Optical correlator
EP0152186A3 (en) * 1984-02-07 1987-08-26 Stc Plc Optical correlator
JPH0220823A (en) * 1988-07-08 1990-01-24 Agency Of Ind Science & Technol Method and device for optical space phase modulation
JPH0455484B2 (en) * 1988-07-08 1992-09-03 Kogyo Gijutsuin
EP0359468A2 (en) * 1988-09-07 1990-03-21 Seiko Instruments Inc. Optical correlator and method of optical correlation
US5150229A (en) * 1988-09-07 1992-09-22 Seiko Instruments Inc. Optical correlator
EP0403305A2 (en) 1989-06-16 1990-12-19 Seiko Instruments Inc. Optical pattern recognition apparatus
US5598485A (en) * 1992-12-04 1997-01-28 Hamamatsu Photonics K.K. Apparatus for performing a joint fourier tranform utilizing apertures of low correlation
US5493444A (en) * 1994-04-28 1996-02-20 The United States Of America As Represented By The Secretary Of The Air Force Photorefractive two-beam coupling nonlinear joint transform correlator

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