GB1171683A - Optical Processing - Google Patents

Optical Processing

Info

Publication number
GB1171683A
GB1171683A GB1814267A GB1814267A GB1171683A GB 1171683 A GB1171683 A GB 1171683A GB 1814267 A GB1814267 A GB 1814267A GB 1814267 A GB1814267 A GB 1814267A GB 1171683 A GB1171683 A GB 1171683A
Authority
GB
United Kingdom
Prior art keywords
lens system
radar
record
range
doppler frequency
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.)
Expired
Application number
GB1814267A
Inventor
Charles Robinson Ditchfield
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.)
MINI OF TECHNOLOGY
Minister of Technology
Original Assignee
MINI OF TECHNOLOGY
Minister of Technology
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 MINI OF TECHNOLOGY, Minister of Technology filed Critical MINI OF TECHNOLOGY
Priority to GB1814267A priority Critical patent/GB1171683A/en
Publication of GB1171683A publication Critical patent/GB1171683A/en
Expired 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S13/585—Velocity or trajectory determination systems; Sense-of-movement determination systems processing the video signal in order to evaluate or display the velocity value
    • G01S13/587—Velocity or trajectory determination systems; Sense-of-movement determination systems processing the video signal in order to evaluate or display the velocity value using optical means

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

1,171,683. Radar. MINISTER OF TECHNOLOGY. 18 July, 1968 [20 April, 1967], No. 18142/67. Heading H4D. [Also in Division G2] In an optical processor of Doppler returns in a radar on a moving platform, a record 1 of radar echoes in the form of a one dimensional zone plate is moved in front of a laser beam, a conical lens system 17 moves in synchronism with the record, an anastigmatic lens system 11 brings the light into focus in its back focal plane with the displacement of the spot from the axis representing the Doppler frequency, and an astigmatic lens system 13 ensures that a Fourier analysis has an output plane coincident with the image plane for the range axis on screen 9 (which is a range-velocity display). After an appropriate processing time system 17 reverts rapidly to its original position and the cycle continues. Clutter is reduced. By utilizing an offset frequency at least twice as large as the maximum Doppler frequency, approaching and receding targets are differentiated. A conical lens system is defined.
GB1814267A 1967-04-20 1967-04-20 Optical Processing Expired GB1171683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1814267A GB1171683A (en) 1967-04-20 1967-04-20 Optical Processing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1814267A GB1171683A (en) 1967-04-20 1967-04-20 Optical Processing

Publications (1)

Publication Number Publication Date
GB1171683A true GB1171683A (en) 1969-11-26

Family

ID=10107376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1814267A Expired GB1171683A (en) 1967-04-20 1967-04-20 Optical Processing

Country Status (1)

Country Link
GB (1) GB1171683A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111045215A (en) * 2020-01-03 2020-04-21 佛山科学技术学院 Multichannel optical orbital angular momentum beam shaping optical system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111045215A (en) * 2020-01-03 2020-04-21 佛山科学技术学院 Multichannel optical orbital angular momentum beam shaping optical system

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