FR2369543A1 - Colorimetre trichromatique assurant la compensation de la reflectance interne - Google Patents
Colorimetre trichromatique assurant la compensation de la reflectance interneInfo
- Publication number
- FR2369543A1 FR2369543A1 FR7732465A FR7732465A FR2369543A1 FR 2369543 A1 FR2369543 A1 FR 2369543A1 FR 7732465 A FR7732465 A FR 7732465A FR 7732465 A FR7732465 A FR 7732465A FR 2369543 A1 FR2369543 A1 FR 2369543A1
- Authority
- FR
- France
- Prior art keywords
- reference voltage
- optical transducer
- compensator
- colour
- display device
- 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.)
- Withdrawn
Links
- 230000003287 optical effect Effects 0.000 title abstract 2
- 230000000694 effects Effects 0.000 abstract 1
- 230000010354 integration 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
- G01J3/02—Details
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
- A61C19/10—Supports for artificial teeth for transport or for comparison of the colour
-
- 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
- G01J3/0218—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using optical fibers
-
- 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
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/465—Measurement of colour; Colour measuring devices, e.g. colorimeters taking into account the colour perception of the eye; using tristimulus detection
Abstract
L'invention concerne un appareil de mesure optique comportant un photodétecteur pour produire un signal électrique indicatif de l'intensité d'un faisceau lumineux inconnu qui le frappe, ce faisceau comportant une partie d'erreur et une partie due à la lumière d'un objet examiné, et un circuit de sortie pour produire un signal de sortie, fonction du temps, indicatif de l'intensité du faisceau lumineux par rapport à un signal de référence. L'appareil comporte un circuit de compensation 18 pour accroître la partie d'erreur du signal électrique inconnu d'une quantité qui provoque la production par les moyens de sortie d'un signal fonction du temps prédeterminé et des moyens pour étalonner les moyens de sortie afin qu'ils produisent un signal de sortie O lorsque ledit signal prédéterminé est ainsi produit L'invention est applicable, notamment, à la compensation de la réflectance interne d'un colorimètre trichromatique.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/737,905 US4131367A (en) | 1976-09-07 | 1976-11-02 | Tristimulus colormeter with internal reflectance compensation |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2369543A1 true FR2369543A1 (fr) | 1978-05-26 |
Family
ID=24965766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7732465A Withdrawn FR2369543A1 (fr) | 1976-11-02 | 1977-10-27 | Colorimetre trichromatique assurant la compensation de la reflectance interne |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS5357886A (fr) |
CA (1) | CA1080996A (fr) |
DE (1) | DE2746677A1 (fr) |
FR (1) | FR2369543A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4420260C2 (de) * | 1994-06-10 | 1998-08-06 | Alfred Prof Dr Ing Leipertz | Verfahren zur Bestimmung von Farbwertanteilen und Farbsättigung |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3617885A (en) * | 1967-03-01 | 1971-11-02 | Solartron Electronic Group | Digital voltmeters |
US3681577A (en) * | 1970-10-30 | 1972-08-01 | Technicon Instr | Automatic calibration apparatus |
US3685048A (en) * | 1970-09-30 | 1972-08-15 | Bendix Corp | Self-calibrating analog to digital converter with predetermined transfer characteristics |
US3955096A (en) * | 1975-06-19 | 1976-05-04 | E. I. Du Pont De Nemours And Company | Implicit ratio computer for sequential signals |
US3958236A (en) * | 1974-12-18 | 1976-05-18 | Weston Instruments, Inc. | Offset control in autozeroing circuits for analog-to-digital converters |
US3986777A (en) * | 1974-08-22 | 1976-10-19 | Weber Dental Mfg. Co., Div. Of Sterndent Corporation | Tristimulus colorimeter for use in the fabrication of artificial teeth |
-
1977
- 1977-10-18 DE DE19772746677 patent/DE2746677A1/de not_active Withdrawn
- 1977-10-26 CA CA289,544A patent/CA1080996A/fr not_active Expired
- 1977-10-27 FR FR7732465A patent/FR2369543A1/fr not_active Withdrawn
- 1977-11-01 JP JP13036077A patent/JPS5357886A/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3617885A (en) * | 1967-03-01 | 1971-11-02 | Solartron Electronic Group | Digital voltmeters |
US3685048A (en) * | 1970-09-30 | 1972-08-15 | Bendix Corp | Self-calibrating analog to digital converter with predetermined transfer characteristics |
US3681577A (en) * | 1970-10-30 | 1972-08-01 | Technicon Instr | Automatic calibration apparatus |
US3986777A (en) * | 1974-08-22 | 1976-10-19 | Weber Dental Mfg. Co., Div. Of Sterndent Corporation | Tristimulus colorimeter for use in the fabrication of artificial teeth |
US3958236A (en) * | 1974-12-18 | 1976-05-18 | Weston Instruments, Inc. | Offset control in autozeroing circuits for analog-to-digital converters |
US3955096A (en) * | 1975-06-19 | 1976-05-04 | E. I. Du Pont De Nemours And Company | Implicit ratio computer for sequential signals |
Also Published As
Publication number | Publication date |
---|---|
DE2746677A1 (de) | 1978-05-03 |
CA1080996A (fr) | 1980-07-08 |
JPS5357886A (en) | 1978-05-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |