GB8514818D0 - Manufacturing filter - Google Patents

Manufacturing filter

Info

Publication number
GB8514818D0
GB8514818D0 GB858514818A GB8514818A GB8514818D0 GB 8514818 D0 GB8514818 D0 GB 8514818D0 GB 858514818 A GB858514818 A GB 858514818A GB 8514818 A GB8514818 A GB 8514818A GB 8514818 D0 GB8514818 D0 GB 8514818D0
Authority
GB
United Kingdom
Prior art keywords
manufacturing filter
filter
manufacturing
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.)
Granted
Application number
GB858514818A
Other versions
GB2161953B (en
GB2161953A (en
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.)
Videocolor SA
Original Assignee
Videocolor SA
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 Videocolor SA filed Critical Videocolor SA
Publication of GB8514818D0 publication Critical patent/GB8514818D0/en
Publication of GB2161953A publication Critical patent/GB2161953A/en
Application granted granted Critical
Publication of GB2161953B publication Critical patent/GB2161953B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/205—Neutral density filters
GB08514818A 1984-06-22 1985-06-12 Manufacturing a filter having a light transmission coefficient which varies over its surface Expired GB2161953B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8409878A FR2566542B1 (en) 1984-06-22 1984-06-22 METHOD FOR MANUFACTURING A VARIABLE LIGHT TRANSMISSION COEFFICIENT FILTER ON ITS SURFACE

Publications (3)

Publication Number Publication Date
GB8514818D0 true GB8514818D0 (en) 1985-07-17
GB2161953A GB2161953A (en) 1986-01-22
GB2161953B GB2161953B (en) 1987-11-11

Family

ID=9305349

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08514818A Expired GB2161953B (en) 1984-06-22 1985-06-12 Manufacturing a filter having a light transmission coefficient which varies over its surface

Country Status (4)

Country Link
KR (1) KR860000584A (en)
FR (1) FR2566542B1 (en)
GB (1) GB2161953B (en)
IT (1) IT1183899B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10127225A1 (en) * 2001-05-22 2002-11-28 Zeiss Carl Ultraviolet light cut filter
JP6872041B2 (en) * 2017-12-06 2021-05-19 浙江▲藍▼天▲環▼保高科技股▲分▼有限公司 Highly selective production method of 2,3-dichloro-5-trifluoromethylpyridine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1049383A (en) * 1962-06-04 1966-11-23 Douglas Aircraft Co Inc Ambient light trapping filter and method of making
US3504960A (en) * 1966-10-11 1970-04-07 Xerox Corp Sagittal ray aperture stop
US4046929A (en) * 1975-05-09 1977-09-06 Vicon Industries, Inc. Attenuation spot filters manufacturing process
JPS5247672A (en) * 1975-10-15 1977-04-15 Hitachi Ltd Illuminance correction filter and manufacturing method thereof
NL7602752A (en) * 1976-03-17 1977-09-20 Philips Nv EXPOSURE DEVICE FOR MANUFACTURING DISPLAYS OF COLOR TV DISPLAY TUBES AND DISPLAY TUBE MADE WITH SUCH A DEVICE.
EP0075044A1 (en) * 1981-09-19 1983-03-30 Elesta Ag Elektronik Aid for measuring the surplus of light in light barriers

Also Published As

Publication number Publication date
FR2566542A1 (en) 1985-12-27
GB2161953B (en) 1987-11-11
KR860000584A (en) 1986-01-29
IT1183899B (en) 1987-10-22
IT8567582A0 (en) 1985-06-21
GB2161953A (en) 1986-01-22
FR2566542B1 (en) 1988-01-15

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee