GB1390194A - Comparators - Google Patents
ComparatorsInfo
- Publication number
- GB1390194A GB1390194A GB1785372A GB1785372A GB1390194A GB 1390194 A GB1390194 A GB 1390194A GB 1785372 A GB1785372 A GB 1785372A GB 1785372 A GB1785372 A GB 1785372A GB 1390194 A GB1390194 A GB 1390194A
- Authority
- GB
- United Kingdom
- Prior art keywords
- colours
- density
- colour
- april
- gain
- 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
Links
- 239000003086 colorant Substances 0.000 abstract 3
- 230000007935 neutral effect Effects 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/52—Measurement of colour; Colour measuring devices, e.g. colorimeters using colour charts
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Optical Filters (AREA)
- Color Television Image Signal Generators (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
1390194 Colour comparator R W MITCHELL 18 April 1972 [19 April 1971] 17853/72 Heading G2J A filter for colour comparison purposes, comprises a stack of appropriately coloured diaphanous films overlapping in such a manner to gain differing density of colours and differing combinations of colours and sintered density filter arranged to compensate for the varying density of the colours to gain the same overall optical density . One arrangement has a neutral point 46 occurring in colour saturation in three planes to the respective yellow, magenta and cyan corners 60, 64, 56.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13496471A | 1971-04-19 | 1971-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1390194A true GB1390194A (en) | 1975-04-09 |
Family
ID=22465838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1785372A Expired GB1390194A (en) | 1971-04-19 | 1972-04-18 | Comparators |
Country Status (7)
Country | Link |
---|---|
US (1) | US3748045A (en) |
JP (1) | JPS5128238B1 (en) |
CA (1) | CA953493A (en) |
DE (1) | DE2218917B2 (en) |
FR (1) | FR2133847B1 (en) |
GB (1) | GB1390194A (en) |
IT (1) | IT952615B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3967897A (en) * | 1974-10-04 | 1976-07-06 | Rogers Winston L | Apparatus and method for evaluating color negatives |
JPS5931056B2 (en) * | 1975-05-15 | 1984-07-31 | 直司 西川 | Color correction method and color print scale for color prints |
US4257702A (en) * | 1977-07-05 | 1981-03-24 | Miller Bertram W | Apparatus for ascertaining color balance of photographic printing paper |
USRE30449E (en) * | 1978-07-10 | 1980-12-16 | Photographic printing method | |
US4492474A (en) * | 1982-05-26 | 1985-01-08 | Miller Bertram W | Method and apparatus for ascertaining color balance of photographic printing paper |
AU5173890A (en) * | 1989-02-15 | 1990-09-05 | Lithodatec Managment Inc. | Colour system calibration sheet, vignettes and transitions |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1769777A (en) * | 1928-04-21 | 1930-07-01 | Equity Press Inc | Hzemoglobin chart |
DE622102C (en) * | 1931-06-01 | 1935-11-19 | Alfons Michalski | Device for examining and determining color tone values and printing element sizes |
US2128676A (en) * | 1935-12-07 | 1938-08-30 | Interchem Corp | Color chart and method of making the same |
US2240053A (en) * | 1939-04-05 | 1941-04-29 | Richardson King | Color scale |
US3529519A (en) * | 1968-04-11 | 1970-09-22 | Heath Co | Method and apparatus for color adjusting in photographic printing |
-
1971
- 1971-04-19 US US00134964A patent/US3748045A/en not_active Expired - Lifetime
-
1972
- 1972-04-06 CA CA139,077A patent/CA953493A/en not_active Expired
- 1972-04-12 IT IT49564/72A patent/IT952615B/en active
- 1972-04-17 JP JP47037852A patent/JPS5128238B1/ja active Pending
- 1972-04-18 GB GB1785372A patent/GB1390194A/en not_active Expired
- 1972-04-18 FR FR7213565A patent/FR2133847B1/fr not_active Expired
- 1972-04-19 DE DE19722218917 patent/DE2218917B2/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2133847A1 (en) | 1972-12-01 |
CA953493A (en) | 1974-08-27 |
DE2218917A1 (en) | 1972-11-09 |
US3748045A (en) | 1973-07-24 |
FR2133847B1 (en) | 1974-12-20 |
DE2218917B2 (en) | 1976-07-15 |
IT952615B (en) | 1973-07-30 |
JPS5128238B1 (en) | 1976-08-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
PCNP | Patent ceased through non-payment of renewal fee |