GB1518645A - Colour meter having filter mirror - Google Patents
Colour meter having filter mirrorInfo
- Publication number
- GB1518645A GB1518645A GB990277A GB990277A GB1518645A GB 1518645 A GB1518645 A GB 1518645A GB 990277 A GB990277 A GB 990277A GB 990277 A GB990277 A GB 990277A GB 1518645 A GB1518645 A GB 1518645A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter
- sample
- light
- mirror
- port
- 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
- 238000005259 measurement Methods 0.000 abstract 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 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
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
-
- 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
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0251—Colorimeters making use of an integrating sphere
-
- 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
- G01J3/02—Details
- G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
1518645 Colour measurement S SUGA 9 March 1977 09902/77 Heading G1A [Also in Division G2] Colour measurement apparatus for obtaining the three stimulus values x, y, z for a sample 3, comprises: an integrating sphere 1, having a first port 2 for incident light, a second port 4 for the sample 3 to be tested, and a third port 5 for allowing diffusely reflected light from the sample to reach a photo-detector 16, which may be a silicon photocell; a lamp 11; a pair of lenses 6, 7, with a pin hole 8 therebetween, the arrangement being such that parallel beams of light, both direct from the lamp and after reflection from filter mirror 13', 13", or 13"', are caused to illuminate the samples; a heat shield filter 9; a movable carriage 13 for mounting the three filter mirrors; and three filters mounted on a movable frame 17, the pairs of filters and filter mirrors corresponding to the three stimulus values and being arranged to be brought into position, in their corresponding pairs, respectively in front of the photo-cell and behind the light source. Each filter mirror consists of a spherical mirror comprising an evaporated coating of aluminium on, or metallic surface welded to, a filter of glassy material having a transmission factor corresponding to x, y or z. The resultant effect, for each stimulus measurement, of illuminating the sample direct and with light filtered at the source by a filter mirror is stated to provide results closer to theoretically expected values than prior art systems, and figures are given to illustrate this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB990277A GB1518645A (en) | 1977-03-09 | 1977-03-09 | Colour meter having filter mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB990277A GB1518645A (en) | 1977-03-09 | 1977-03-09 | Colour meter having filter mirror |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1518645A true GB1518645A (en) | 1978-07-19 |
Family
ID=9880915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB990277A Expired GB1518645A (en) | 1977-03-09 | 1977-03-09 | Colour meter having filter mirror |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1518645A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2122743A (en) * | 1982-06-29 | 1984-01-18 | Bergstroem Arne | Apparatus for authenticating bank notes |
-
1977
- 1977-03-09 GB GB990277A patent/GB1518645A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2122743A (en) * | 1982-06-29 | 1984-01-18 | Bergstroem Arne | Apparatus for authenticating bank notes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |