GB1339184A - Photographic reproduction apparatus - Google Patents

Photographic reproduction apparatus

Info

Publication number
GB1339184A
GB1339184A GB1339184DA GB1339184A GB 1339184 A GB1339184 A GB 1339184A GB 1339184D A GB1339184D A GB 1339184DA GB 1339184 A GB1339184 A GB 1339184A
Authority
GB
United Kingdom
Prior art keywords
photo
cell
original
cone
photographic
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
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.)
Pentacon GmbH Foto und Feinwerktechnik
Original Assignee
Pentacon Dresden VEB
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 Pentacon Dresden VEB filed Critical Pentacon Dresden VEB
Publication of GB1339184A publication Critical patent/GB1339184A/en
Expired legal-status Critical Current

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
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/74—Positioning exposure meters in the apparatus

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

1339184 Photographic exposure control: oplanatic lenses PENTACON DRESDEN KAMERA-UND KINOWERKE VEB 8 Oct 1971 47045/71 Headings G2A and G2J In an exposure measuring system for photographic reproduction apparatus such as a microfilm camera, an object station 1 is within the taking field cone of a lens 3 which images anything in this cone on the object station on sensitive surface 2 and a photo-cell 5 is arranged outside this cone such that light reflected from the original may be imaged on photo-cell 5 by an oplanatically corrected optical system 4. The optical system allows for part of the original to be continuously monitored by the photo-cell during reproduction. A rotating segment mirror (8) Fig.2 (not shown) may be placed in the exposure measuring light path so that part of an original may be marked with a light beam from a lamp system (7) and its reflected optical density measured on photo-cell 5. The positions of the light source and photo-cell may be interchanged.
GB1339184D 1971-10-08 1971-10-08 Photographic reproduction apparatus Expired GB1339184A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4704571 1971-10-08

Publications (1)

Publication Number Publication Date
GB1339184A true GB1339184A (en) 1973-11-28

Family

ID=10443505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1339184D Expired GB1339184A (en) 1971-10-08 1971-10-08 Photographic reproduction apparatus

Country Status (1)

Country Link
GB (1) GB1339184A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2447051A1 (en) * 1979-01-19 1980-08-14 Bockemuehl Johannes PHOTOGRAPHIC ENLARGER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2447051A1 (en) * 1979-01-19 1980-08-14 Bockemuehl Johannes PHOTOGRAPHIC ENLARGER

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees