GB1333922A - Spatial filters - Google Patents

Spatial filters

Info

Publication number
GB1333922A
GB1333922A GB1333922DA GB1333922A GB 1333922 A GB1333922 A GB 1333922A GB 1333922D A GB1333922D A GB 1333922DA GB 1333922 A GB1333922 A GB 1333922A
Authority
GB
United Kingdom
Prior art keywords
component
recording
amplitude
plate
produced
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
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Publication of GB1333922A publication Critical patent/GB1333922A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/46—Systems using spatial filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)

Abstract

1333922 Spatial filters UNITED KINGDOM ATOMIC ENERGY AUTHORITY 19 April 1971 [18 March 1970] 13167/70 Heading G2J A spatial filter is produced by sequentially recording a first component and a second component on the same film or plate by two successive exposures, and developing the film or plate to give a gamma of approximately two, the first component being a diffaction pattern made from a transparency, and the second component being the interference pattern produced by combining the diffraction pattern with a further beam, the successive exposures at least approximately satisfying the relation # = E 1 /E i - E 1 /E 2 , the symbols being as defined in the Specification. The exposurerecording the second component is preferably made before the exposure recording the first component. The amplitude of the further beam is preferably large when compared with the amplitude of the diffraction pattern beam when recording the second component.
GB1333922D 1971-04-19 1971-04-19 Spatial filters Expired GB1333922A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1316770 1971-04-19

Publications (1)

Publication Number Publication Date
GB1333922A true GB1333922A (en) 1973-10-17

Family

ID=10018095

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1333922D Expired GB1333922A (en) 1971-04-19 1971-04-19 Spatial filters

Country Status (1)

Country Link
GB (1) GB1333922A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472217A1 (en) * 1979-12-21 1981-06-26 Philips Nv Holographic method for prodn. of inverse filter - using recording material with logarithmic characteristic and stipulated intensity ratio between reference and lens beams
EP0114524A1 (en) * 1982-12-27 1984-08-01 The University Of Dayton Production of high performance optical spatial filters

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472217A1 (en) * 1979-12-21 1981-06-26 Philips Nv Holographic method for prodn. of inverse filter - using recording material with logarithmic characteristic and stipulated intensity ratio between reference and lens beams
EP0114524A1 (en) * 1982-12-27 1984-08-01 The University Of Dayton Production of high performance optical spatial filters

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees