CH325521A - Device for the continuous regulation of a luminous flux directed onto a photometer by means of an adjustable diaphragm, especially intended for electric light meters - Google Patents

Device for the continuous regulation of a luminous flux directed onto a photometer by means of an adjustable diaphragm, especially intended for electric light meters

Info

Publication number
CH325521A
CH325521A CH325521DA CH325521A CH 325521 A CH325521 A CH 325521A CH 325521D A CH325521D A CH 325521DA CH 325521 A CH325521 A CH 325521A
Authority
CH
Switzerland
Prior art keywords
photometer
luminous flux
electric light
directed onto
especially intended
Prior art date
Application number
Other languages
German (de)
Inventor
Friedrich Dr Biedermann
Original Assignee
Agfa Camera Werk Aktiengesells
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 Agfa Camera Werk Aktiengesells filed Critical Agfa Camera Werk Aktiengesells
Publication of CH325521A publication Critical patent/CH325521A/en

Links

Classifications

    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/04—Control effected by hand adjustment of a member that senses indication of a pointer of a built- in light-sensitive device, e.g. by restoring point to a fixed associated reference mark
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Microscoopes, Condenser (AREA)
CH325521D 1953-05-21 1954-04-21 Device for the continuous regulation of a luminous flux directed onto a photometer by means of an adjustable diaphragm, especially intended for electric light meters CH325521A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA18057A DE1008017B (en) 1953-05-21 1953-05-21 Aperture device for photometer

Publications (1)

Publication Number Publication Date
CH325521A true CH325521A (en) 1957-11-15

Family

ID=6924056

Family Applications (1)

Application Number Title Priority Date Filing Date
CH325521D CH325521A (en) 1953-05-21 1954-04-21 Device for the continuous regulation of a luminous flux directed onto a photometer by means of an adjustable diaphragm, especially intended for electric light meters

Country Status (7)

Country Link
AT (1) AT183976B (en)
CH (1) CH325521A (en)
DE (1) DE1008017B (en)
FR (1) FR1106713A (en)
GB (1) GB783607A (en)
IT (1) IT516249A (en)
NL (1) NL186314B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111846954A (en) * 2020-09-02 2020-10-30 钱丹 Variable-pitch material sucking mechanism

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE608427C (en) * 1935-01-23 Gauthier Gmbh A Lens shutter with light meter
DE610294C (en) * 1935-03-07 Gauthier Gmbh A Photographic lens shutter with light meter
DE582033C (en) * 1929-06-09 1933-08-07 Gauthier Gmbh A Photographic lens shutter with light meter
DE704313C (en) * 1935-09-01 1941-03-27 Metrawatt Akt Ges Photoelectric light meter with swiveling measuring range aperture
DE702924C (en) * 1938-07-24 1941-02-25 Fritz Reich Dipl Ing Optical exposure meter on photographic cameras
DE852653C (en) * 1949-09-24 1952-10-16 Egon Fischer Attachment for photographic or cinematographic cameras, preferably for those with a viewfinder lens

Also Published As

Publication number Publication date
DE1008017B (en) 1957-05-09
IT516249A (en)
NL186314B (en)
AT183976B (en) 1955-12-10
FR1106713A (en) 1955-12-22
GB783607A (en) 1957-09-25

Similar Documents

Publication Publication Date Title
CH320607A (en) Light emitting device
CH348462A (en) Circuit for controlling an alternating current circuit by means of a gas discharge tube
FR1077943A (en) Instruments for measuring small gas flow rates
CH325521A (en) Device for the continuous regulation of a luminous flux directed onto a photometer by means of an adjustable diaphragm, especially intended for electric light meters
CH324998A (en) Device for hanging a sheet metal cassette ceiling on a beam
AT190291B (en) Device for determining or evaluating the deviation of a dimension of a test object from the nominal value by means of a wedge-shaped jaw gauge
CH287410A (en) Device for automatic telecommunication systems, for occupying an apparatus.
CH428273A (en) Device for measuring the productivity of a source of a specific gas
CH307831A (en) Device for controlling the light intensity of a film projector with continuous film advance.
FR1104288A (en) Device for measuring distance on board aircraft
AT176609B (en) Device for generating light
CH330627A (en) Control device for an electrically heated device
AT181181B (en) Device for generating an intermittent movement
AT183975B (en) Illumination apparatus for reflected light microscopes
AT185465B (en) Device for regulating the strength of an intermittent current
CH320972A (en) Circuit arrangement for generating a sawtooth-shaped current
AT187677B (en) Device for controlling a frame saw
CH310986A (en) Device for artificial respiration.
CH227371A (en) Procedure for measuring aircraft distance from the airfield.
DK80839C (en) Apparatus for controlling air by artificial respiration or anesthesia.
AT190160B (en) Device for operating lamps arranged high up
AT180906B (en) Device for making a turn on asbestos cement pipes
AT186019B (en) Device for stereoscopic projection
AT184987B (en) Device for feeding a light panel
AT177263B (en) Straight guide for the optical system on illuminated image price scales