GB1487399A – Optical imaging
– Google Patents
GB1487399A – Optical imaging
– Google Patents
Optical imaging
Info
Publication number
GB1487399A
GB1487399A
GB4522774A
GB4522774A
GB1487399A
GB 1487399 A
GB1487399 A
GB 1487399A
GB 4522774 A
GB4522774 A
GB 4522774A
GB 4522774 A
GB4522774 A
GB 4522774A
GB 1487399 A
GB1487399 A
GB 1487399A
Authority
GB
United Kingdom
Prior art keywords
image
fraunhofer
oct
diffraction pattern
depth
Prior art date
1973-10-23
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
GB4522774A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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.)
1973-10-23
Filing date
1974-10-18
Publication date
1977-09-28
1974-10-18
Application filed by Philips Electronic and Associated Industries Ltd
filed
Critical
Philips Electronic and Associated Industries Ltd
1977-09-28
Publication of GB1487399A
publication
Critical
patent/GB1487399A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
G03F7/70—Microphotolithographic exposure; Apparatus therefor
G03F7/70216—Mask projection systems
G03F7/70308—Optical correction elements, filters or phase plates for manipulating imaging light, e.g. intensity, wavelength, polarisation, phase or image shift
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
G—PHYSICS
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
G03F7/20—Exposure; Apparatus therefor
G03F7/2002—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image
G03F7/2008—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image characterised by the reflectors, diffusers, light or heat filtering means or anti-reflective means used
Abstract
1487399 Spatial filtering PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 18 Oct 1974 [23 Oct 1973] 45227/74 Heading G2J The image of an object (which object comprises a plurality of individual identical objects arranged in a periodic array) is rendered substantially defect free and of increased depth of focus by selective spatial filtering of the Fraunhofer diffraction pattern orders. The Fraunhofer diffraction pattern of a regular array of hexagonally arranged holes is shown by X’s in Fig. 4. A spatial filter allows only those diffraction images encircled to pass on to form the reconstituted image. This has three effects:-(a) the depth of field of the reconstituted image is increased; (b) the minor periodic defects are removed; (c) the number of “holes” in the image may be different from that in the object dependent on the “order” of the Fraunhofer images transmitted by the spatial filter.
GB4522774A
1973-10-23
1974-10-18
Optical imaging
Expired
GB1487399A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DE19732352957
DE2352957A1
(en)
1973-10-23
1973-10-23
OPTICAL PROCESS FOR ELIMINATING ERRORS IN IMAGES OBTAINED FROM ARTICLES, THAT CONSIST OF PERIODICALLY ARRANGED INDIVIDUAL IMAGES
Publications (1)
Publication Number
Publication Date
GB1487399A
true
GB1487399A
(en)
1977-09-28
Family
ID=5896127
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4522774A
Expired
GB1487399A
(en)
1973-10-23
1974-10-18
Optical imaging
Country Status (5)
Country
Link
JP
(1)
JPS569688B2
(en)
DE
(1)
DE2352957A1
(en)
FR
(1)
FR2248526B1
(en)
GB
(1)
GB1487399A
(en)
NL
(1)
NL7413743A
(en)
Families Citing this family (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS60164781U
(en)
*
1984-04-10
1985-11-01
古河電気工業株式会社
Crimp cutting tool for coaxial connector installation
1973
1973-10-23
DE
DE19732352957
patent/DE2352957A1/en
not_active
Withdrawn
1974
1974-10-18
GB
GB4522774A
patent/GB1487399A/en
not_active
Expired
1974-10-21
NL
NL7413743A
patent/NL7413743A/en
unknown
1974-10-21
JP
JP12043974A
patent/JPS569688B2/ja
not_active
Expired
1974-10-22
FR
FR7435431A
patent/FR2248526B1/fr
not_active
Expired
Also Published As
Publication number
Publication date
JPS5068539A
(en)
1975-06-07
JPS569688B2
(en)
1981-03-03
DE2352957A1
(en)
1975-04-30
NL7413743A
(en)
1975-04-25
FR2248526A1
(en)
1975-05-16
FR2248526B1
(en)
1977-10-28
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Legal Events
Date
Code
Title
Description
1978-02-08
PS
Patent sealed
1981-06-03
PCNP
Patent ceased through non-payment of renewal fee
