[go: up one dir, main page]

GB216831A - A device for determining photographic exposures - Google Patents

A device for determining photographic exposures

Info

Publication number
GB216831A
GB216831A GB20749/23A GB2074923A GB216831A GB 216831 A GB216831 A GB 216831A GB 20749/23 A GB20749/23 A GB 20749/23A GB 2074923 A GB2074923 A GB 2074923A GB 216831 A GB216831 A GB 216831A
Authority
GB
United Kingdom
Prior art keywords
sections
determining
graded
photographic exposures
strips
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
GB20749/23A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB216831A publication Critical patent/GB216831A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/48—Photometry, e.g. photographic exposure meter using chemical effects
    • G01J1/50—Photometry, e.g. photographic exposure meter using chemical effects using change in colour of an indicator, e.g. actinometer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Projection-Type Copiers In General (AREA)

Abstract

216,831. Mayer, E. May 30, 1923, [Convention date]. Printing meters. - A sheet having sections or areas of varying transparency for determining the correct printing exposure for a negative. has two graded strips arranged side by side, the most transparent area of one strip being adjacent the darkest area of the other atrip. The strips may be continuously graded or may have sections of definite opacity and these may be stepped in different ratios.
GB20749/23A 1923-05-30 1923-08-15 A device for determining photographic exposures Expired GB216831A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT216831X 1923-05-30

Publications (1)

Publication Number Publication Date
GB216831A true GB216831A (en) 1924-08-28

Family

ID=3669774

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20749/23A Expired GB216831A (en) 1923-05-30 1923-08-15 A device for determining photographic exposures

Country Status (1)

Country Link
GB (1) GB216831A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129160A (en) * 1982-10-19 1984-05-10 British Aerospace Image quality indicators for radiographic techniques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129160A (en) * 1982-10-19 1984-05-10 British Aerospace Image quality indicators for radiographic techniques

Similar Documents

Publication Publication Date Title
GB216831A (en) A device for determining photographic exposures
GB277297A (en) Improvements in photographic films
SU16929A1 (en) Counter for cuts in negative film
US1986278A (en) Protective paper for photographic material
FR763470A (en) Photo-mechanical printing
FR616604A (en) Improvements in visual acuity assessment means
ES225U (en) Bag-case for shirts. (Machine-translation by Google Translate, not legally binding)
ES121846A1 (en) Procedure for obtaining transparent photographic positives in two colors.
AT127095B (en) Device for reproducing high-contrast or low-contrast negatives.
GB288833A (en) Improvements in or relating to devices for use in comparing colours
AT140763B (en) Sheet-like printing plate with reinforced edges for offset printing presses.
CA245049A (en) Photographic printing in colours
FR559556A (en) Improvement in automatic scales and scales
FR791216A (en) Development in sockets
FR584629A (en) Easy-open envelope system, with advertising
GB280205A (en) Improvements in display signs
GR722B (en) IMPROVEMENTS IN PHOTOGRAPHIC SENSITIVITY.
FR733296A (en) Improvements in dyeing and printing processes
GB205781A (en) Improvement in adjustable indexes
FR740648A (en) Letterpress printing process and device allowing the realization
FR647263A (en) Roll film numbering machine
ES120940A3 (en) A tensioning and sealing device for metal strips.
FR582372A (en) Mail franking, stamping and sealing machine
CA319828A (en) Sheet material measuring device
CA254310A (en) Sheet or strip for use in making multiple copies