Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
GB216831A - A device for determining photographic exposures - Google Patents
[go: Go Back, 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
SU30923A1 (en) Method for increasing contrasts in the variation of photographic prints
SU16929A1 (en) Counter for cuts in negative film
US1986278A (en) Protective paper for photographic material
FR763470A (en) Photo-mechanical printing
FR762976A (en) Photographic film roll
FR616604A (en) Improvements in visual acuity assessment means
FR772383A (en) Improvements in lithographic and photolithographic processes
ES225U (en) Bag-case for shirts. (Machine-translation by Google Translate, not legally binding)
CH145573A (en) Device for showing transparent images.
ES121846A1 (en) Procedure for obtaining transparent photographic positives in two colors.
AU2533230A (en) Improvement in photographic light sensitive material and process for making same
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.
FR559556A (en) Improvement in automatic scales and scales
FR791216A (en) Development in sockets
FR622080A (en) Postal cartographic system and apparatus intended to contain the elements forming said system
FR584629A (en) Easy-open envelope system, with advertising
GB280205A (en) Improvements in display signs
FR733296A (en) Improvements in dyeing and printing processes
GB205781A (en) Improvement in adjustable indexes
ES447Y (en) Tape measure method for making all kinds of clothing and cutting learning, provided with combined graduation by means of letters.
FR740648A (en) Letterpress printing process and device allowing the realization
FR647263A (en) Roll film numbering machine