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IT1108500B - PROCEDURE AND DEVICE FOR THE CONTROL OF LIGHT INTENSITY IN AN OPTICAL SYSTEM - Google Patents

PROCEDURE AND DEVICE FOR THE CONTROL OF LIGHT INTENSITY IN AN OPTICAL SYSTEM

Info

Publication number
IT1108500B
IT1108500B IT69562/78A IT6956278A IT1108500B IT 1108500 B IT1108500 B IT 1108500B IT 69562/78 A IT69562/78 A IT 69562/78A IT 6956278 A IT6956278 A IT 6956278A IT 1108500 B IT1108500 B IT 1108500B
Authority
IT
Italy
Prior art keywords
procedure
control
optical system
light intensity
intensity
Prior art date
Application number
IT69562/78A
Other languages
Italian (it)
Other versions
IT7869562A0 (en
Original Assignee
Elliott Brothers London 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.)
Filing date
Publication date
Application filed by Elliott Brothers London Ltd filed Critical Elliott Brothers London Ltd
Publication of IT7869562A0 publication Critical patent/IT7869562A0/en
Application granted granted Critical
Publication of IT1108500B publication Critical patent/IT1108500B/en

Links

Classifications

    • 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
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B11/00—Filters or other obturators specially adapted for photographic purposes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/02—Diaphragms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Diaphragms For Cameras (AREA)
  • Optical Elements Other Than Lenses (AREA)
IT69562/78A 1977-11-22 1978-11-08 PROCEDURE AND DEVICE FOR THE CONTROL OF LIGHT INTENSITY IN AN OPTICAL SYSTEM IT1108500B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4885577 1977-11-22

Publications (2)

Publication Number Publication Date
IT7869562A0 IT7869562A0 (en) 1978-11-08
IT1108500B true IT1108500B (en) 1985-12-09

Family

ID=10450170

Family Applications (1)

Application Number Title Priority Date Filing Date
IT69562/78A IT1108500B (en) 1977-11-22 1978-11-08 PROCEDURE AND DEVICE FOR THE CONTROL OF LIGHT INTENSITY IN AN OPTICAL SYSTEM

Country Status (3)

Country Link
DE (1) DE2846662A1 (en)
IT (1) IT1108500B (en)
NL (1) NL7810313A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1251624A (en) * 1983-08-01 1989-03-28 Ronald A. Ferrante Gaussian laser beam filter
US4911711A (en) * 1986-12-05 1990-03-27 Taunton Technologies, Inc. Sculpture apparatus for correcting curvature of the cornea
FR2623293B1 (en) * 1987-11-13 1992-05-07 Angenieux P Ets SHOOTING OBJECTIVE COMPRISING A DEPTH OF FIELD REDUCING SYSTEM
US5111343A (en) * 1990-05-29 1992-05-05 Eastman Kodak Company Gradient filter
US5506614A (en) * 1993-07-12 1996-04-09 Xerox Corporation Selective optical elements for multiwavelength electronic print heads
US5947577A (en) * 1994-12-28 1999-09-07 Nec Corporation Image pick-up device
FR3143777A1 (en) * 2022-12-19 2024-06-21 Thales Filtering device with variable effect

Also Published As

Publication number Publication date
DE2846662A1 (en) 1979-05-23
NL7810313A (en) 1979-05-25
IT7869562A0 (en) 1978-11-08

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