FR2566542B1 - METHOD FOR MANUFACTURING A VARIABLE LIGHT TRANSMISSION COEFFICIENT FILTER ON ITS SURFACE - Google Patents

METHOD FOR MANUFACTURING A VARIABLE LIGHT TRANSMISSION COEFFICIENT FILTER ON ITS SURFACE

Info

Publication number
FR2566542B1
FR2566542B1 FR8409878A FR8409878A FR2566542B1 FR 2566542 B1 FR2566542 B1 FR 2566542B1 FR 8409878 A FR8409878 A FR 8409878A FR 8409878 A FR8409878 A FR 8409878A FR 2566542 B1 FR2566542 B1 FR 2566542B1
Authority
FR
France
Prior art keywords
manufacturing
light transmission
variable light
transmission coefficient
coefficient filter
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
FR8409878A
Other languages
French (fr)
Other versions
FR2566542A1 (en
Inventor
Pierluigi Testa
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
Priority to FR8409878A priority Critical patent/FR2566542B1/en
Priority to GB08514818A priority patent/GB2161953B/en
Priority to KR1019850004404A priority patent/KR860000584A/en
Priority to IT67582/85A priority patent/IT1183899B/en
Publication of FR2566542A1 publication Critical patent/FR2566542A1/en
Application granted granted Critical
Publication of FR2566542B1 publication Critical patent/FR2566542B1/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Control Of Washing Machine And Dryer (AREA)
FR8409878A 1984-06-22 1984-06-22 METHOD FOR MANUFACTURING A VARIABLE LIGHT TRANSMISSION COEFFICIENT FILTER ON ITS SURFACE Expired FR2566542B1 (en)

Priority Applications (4)

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
GB08514818A GB2161953B (en) 1984-06-22 1985-06-12 Manufacturing a filter having a light transmission coefficient which varies over its surface
KR1019850004404A KR860000584A (en) 1984-06-22 1985-06-21 Clock programmer for the control of household washing machines
IT67582/85A IT1183899B (en) 1984-06-22 1985-06-21 PROCEDURE FOR THE MANUFACTURE OF A FILTER WITH VARIABLE LIGHT TRANSMISSION COEFFICIENT ON ITS SURFACE

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 (2)

Publication Number Publication Date
FR2566542A1 FR2566542A1 (en) 1985-12-27
FR2566542B1 true FR2566542B1 (en) 1988-01-15

Family

ID=9305349

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8409878A Expired FR2566542B1 (en) 1984-06-22 1984-06-22 METHOD FOR MANUFACTURING A VARIABLE LIGHT TRANSMISSION COEFFICIENT FILTER ON 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
KR860000584A (en) 1986-01-29
FR2566542A1 (en) 1985-12-27
GB8514818D0 (en) 1985-07-17
IT8567582A0 (en) 1985-06-21
GB2161953B (en) 1987-11-11
GB2161953A (en) 1986-01-22
IT1183899B (en) 1987-10-22

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Legal Events

Date Code Title Description
ST Notification of lapse