GB1279784A - Manufacturing a complex-valued spatial filter - Google Patents

Manufacturing a complex-valued spatial filter

Info

Publication number
GB1279784A
GB1279784A GB1090571A GB1090571A GB1279784A GB 1279784 A GB1279784 A GB 1279784A GB 1090571 A GB1090571 A GB 1090571A GB 1090571 A GB1090571 A GB 1090571A GB 1279784 A GB1279784 A GB 1279784A
Authority
GB
United Kingdom
Prior art keywords
magnitude
order
filter
photo
phase
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
GB1090571A
Inventor
Joseph Vincent Cornacchio
Peter John Magill
William Calhoun Rodgers
Thomas Young
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1279784A publication Critical patent/GB1279784A/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)
  • Holo Graphy (AREA)

Abstract

1279784 Spatial filters INTERNATIONAL BUSINESS MACHINES CORP 23 April 1971 [27 April 1970] 10905/71 Heading G2J A method of manufacturing a complex-valued spatial filter having desired magnitude and phase modulation characteristics for modulating an incident light beam in order to produce in said beam a required image field comprises, determining the required magnitude and phase variations of said light beam, determining the exposure required by a first photo-sensitive medium in order to provide said magnitude variations and the exposure required by a second photo-sensitive medium in order to provide said phase variations, exposing said first photo-sensitive medium to the required exposure with subsequent development in order to provide a first filter portion having said desired magnitude modulation characteristics and exposing the second photo-sensitive medium to the required exposure with subsequent development in order to provide a second filter portion having the desired phase modulation characteristics and optically combining the two filter portions to form the complex spatial filter with the desired magnitude and phase characteristics. A plotter may be used to define the exposures in each elemental area of the media. The magnitude and phase variations may be determined from a diffraction pattern of the object required to be produced by the filter.
GB1090571A 1970-04-27 1971-04-23 Manufacturing a complex-valued spatial filter Expired GB1279784A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3191570A 1970-04-27 1970-04-27

Publications (1)

Publication Number Publication Date
GB1279784A true GB1279784A (en) 1972-06-28

Family

ID=21862089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1090571A Expired GB1279784A (en) 1970-04-27 1971-04-23 Manufacturing a complex-valued spatial filter

Country Status (3)

Country Link
DE (1) DE2120097A1 (en)
FR (1) FR2090499A5 (en)
GB (1) GB1279784A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306771A (en) * 1980-05-27 1981-12-22 International Business Machines Corporation Optical pulse shaping device and method
US4714620A (en) * 1986-12-12 1987-12-22 Warner-Lambert Company Soft, sugarless aerated confectionery composition

Also Published As

Publication number Publication date
DE2120097A1 (en) 1971-11-11
FR2090499A5 (en) 1972-01-14

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Legal Events

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