EG18768A - Graduted filter - Google Patents

Graduted filter

Info

Publication number
EG18768A
EG18768A EG60389A EG60389A EG18768A EG 18768 A EG18768 A EG 18768A EG 60389 A EG60389 A EG 60389A EG 60389 A EG60389 A EG 60389A EG 18768 A EG18768 A EG 18768A
Authority
EG
Egypt
Prior art keywords
graduted
filter
graduted filter
Prior art date
Application number
EG60389A
Original Assignee
Contraves Ag
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 Contraves Ag filed Critical Contraves Ag
Application granted granted Critical
Publication of EG18768A publication Critical patent/EG18768A/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
    • G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/006—Filter holders
EG60389A 1988-12-22 1989-12-09 Graduted filter EG18768A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH474688 1988-12-22

Publications (1)

Publication Number Publication Date
EG18768A true EG18768A (en) 1994-01-30

Family

ID=4281801

Family Applications (1)

Application Number Title Priority Date Filing Date
EG60389A EG18768A (en) 1988-12-22 1989-12-09 Graduted filter

Country Status (6)

Country Link
EP (1) EP0374565B1 (en)
BR (1) BR8906425A (en)
CA (1) CA2005352C (en)
DE (1) DE58904732D1 (en)
EG (1) EG18768A (en)
TR (1) TR24004A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI258600B (en) * 2005-02-16 2006-07-21 Prodisc Technology Inc Light splitter device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2246270A1 (en) * 1971-09-23 1973-03-29 Ferranti Ltd DEVICE FOR FORMATION OF AN OPTICAL OPENING WITH VARIABLE AREA
GB2074339B (en) * 1980-04-18 1984-01-18 Ferranti Ltd Optical attenuator
US4443696A (en) * 1981-08-28 1984-04-17 John Taboada Optical beam intensity control system
US4778263A (en) * 1987-05-29 1988-10-18 The United States Of America As Respresented By The Department Of Energy Variable laser attenuator

Also Published As

Publication number Publication date
EP0374565B1 (en) 1993-06-16
CA2005352A1 (en) 1990-06-22
DE58904732D1 (en) 1993-07-22
EP0374565A3 (en) 1990-10-31
TR24004A (en) 1991-03-01
BR8906425A (en) 1990-08-28
CA2005352C (en) 1999-09-07
EP0374565A2 (en) 1990-06-27

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