[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

FR2352318A1 - Variable aperture diaphragm for lens - has guide rings and movable rings occupying cylindrical volume - Google Patents

Variable aperture diaphragm for lens - has guide rings and movable rings occupying cylindrical volume

Info

Publication number
FR2352318A1
FR2352318A1 FR7615517A FR7615517A FR2352318A1 FR 2352318 A1 FR2352318 A1 FR 2352318A1 FR 7615517 A FR7615517 A FR 7615517A FR 7615517 A FR7615517 A FR 7615517A FR 2352318 A1 FR2352318 A1 FR 2352318A1
Authority
FR
France
Prior art keywords
rings
vanes
ring
lens
cylindrical volume
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
FR7615517A
Other languages
French (fr)
Other versions
FR2352318B1 (en
Inventor
Andre Masson
Gerard Corbasson
Francis Jourdan
Jean-Paul Lepeytre
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.)
Pierre Angenieux SA
Original Assignee
Pierre Angenieux 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 Pierre Angenieux SA filed Critical Pierre Angenieux SA
Priority to FR7615517A priority Critical patent/FR2352318A1/en
Publication of FR2352318A1 publication Critical patent/FR2352318A1/en
Application granted granted Critical
Publication of FR2352318B1 publication Critical patent/FR2352318B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0804—Catadioptric systems using two curved mirrors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0884—Catadioptric systems having a pupil corrector
    • 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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/02—Diaphragms
    • G03B9/06—Two or more co-operating pivoted blades, e.g. iris type

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Diaphragms For Cameras (AREA)

Abstract

A diaphragm of jointed vanes (3) has a first guide ring (1). A second movable ring (2) rotates about its axis, concentric with first ring. The vanes each have studs (4) to ensure mechanical alignment with the rings. They have a predetermined shape to together define an appreciably circular surface. There are means of simultaneously driving the second ring and the vanes, to continuously vary the diameter of the shape between a minimum and a maximum value. The rings (1, 2) occupy a cylindrical volume of diameter approximately equal to the minimum value (D1). The vanes (3) are driven by the centrifugal force outside the volume to occupy the different positions between the minimum and maximum values (D2).
FR7615517A 1976-05-21 1976-05-21 Variable aperture diaphragm for lens - has guide rings and movable rings occupying cylindrical volume Granted FR2352318A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7615517A FR2352318A1 (en) 1976-05-21 1976-05-21 Variable aperture diaphragm for lens - has guide rings and movable rings occupying cylindrical volume

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7615517A FR2352318A1 (en) 1976-05-21 1976-05-21 Variable aperture diaphragm for lens - has guide rings and movable rings occupying cylindrical volume

Publications (2)

Publication Number Publication Date
FR2352318A1 true FR2352318A1 (en) 1977-12-16
FR2352318B1 FR2352318B1 (en) 1979-10-12

Family

ID=9173498

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7615517A Granted FR2352318A1 (en) 1976-05-21 1976-05-21 Variable aperture diaphragm for lens - has guide rings and movable rings occupying cylindrical volume

Country Status (1)

Country Link
FR (1) FR2352318A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2446468A1 (en) * 1979-01-09 1980-08-08 Thomson Csf Opto electronic detector for automatic target tracking - comprises charge coupled device acting as sensor with diaphragm controlling incident light
CN107924107A (en) * 2015-08-19 2018-04-17 富士胶片株式会社 Camera device
CN108139559A (en) * 2015-08-19 2018-06-08 富士胶片株式会社 Lens devices

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2446468A1 (en) * 1979-01-09 1980-08-08 Thomson Csf Opto electronic detector for automatic target tracking - comprises charge coupled device acting as sensor with diaphragm controlling incident light
CN107924107A (en) * 2015-08-19 2018-04-17 富士胶片株式会社 Camera device
CN108139559A (en) * 2015-08-19 2018-06-08 富士胶片株式会社 Lens devices
EP3339931A4 (en) * 2015-08-19 2018-08-08 Fujifilm Corporation Lens device
US10393993B2 (en) 2015-08-19 2019-08-27 Fujifilm Corporation Lens device
CN107924107B (en) * 2015-08-19 2020-09-18 富士胶片株式会社 Image pickup apparatus

Also Published As

Publication number Publication date
FR2352318B1 (en) 1979-10-12

Similar Documents

Publication Publication Date Title
CA996524A (en) Variable diffuser for centrifugal compressor
CA1014922A (en) Supersonic centrifugal compressors
AU501128B2 (en) Balancing ring of centrifugal extractor
CA973096A (en) Variable vanes
AU1180876A (en) Forming an annular groove ina thermoplastic pipe
CA994170A (en) Variable diffuser centrifugal pump shutter control
FR2352318A1 (en) Variable aperture diaphragm for lens - has guide rings and movable rings occupying cylindrical volume
CA1004647A (en) Variable diffuser
FR2311221A1 (en) Diaphragm for vehicle clutch - has alternate radial slots opening into central aperture and peripheral portion acting as Belleville spring
FR2288241A1 (en) Electric pump for hot liquids - has pump cover extension with motor shaft gland and supporting open distance piece carrying motor
SE7501480L (en)
IT7902939A0 (en) PNEUMATIC POSITIONER WITH SINGLE ANNULAR DIAPHRAGM.
SU717463A1 (en) Slide valve
ES410678A1 (en) Centrifugal separator with slide valve for intermittent discharge of sludge
JPS521761A (en) Device of joining and supporting centrifugal separatohousing of a cent rifugal separator
GB1069616A (en) Improved lens diaphragm construction
CA981059A (en) Variable diameter v-belt pulley assembly
CA1019813A (en) Multiple stage variable resistor assembly
SU465499A1 (en) Safety coupling
JPS5210508A (en) Step motor
FR2236576A1 (en) Ejection ring for deep drawing presses - consisting of segments forming single assembly with annular disc
AU511960B2 (en) Centrifugal pressure filter with two piece rotating shaft
SU636702A1 (en) Magnetically-operated contact
SU568749A1 (en) Axial fan
ES200404U (en) Device for coupling complementary pieces. (Machine-translation by Google Translate, not legally binding)

Legal Events

Date Code Title Description
ST Notification of lapse