DE102005048022A1 - Measuring head for image luminance and/or chroma measuring device, has screen, where cross section of screen is adjusted to cross section of acquisition field such that light rays are completely detected by sensor - Google Patents
Measuring head for image luminance and/or chroma measuring device, has screen, where cross section of screen is adjusted to cross section of acquisition field such that light rays are completely detected by sensor Download PDFInfo
- Publication number
- DE102005048022A1 DE102005048022A1 DE200510048022 DE102005048022A DE102005048022A1 DE 102005048022 A1 DE102005048022 A1 DE 102005048022A1 DE 200510048022 DE200510048022 DE 200510048022 DE 102005048022 A DE102005048022 A DE 102005048022A DE 102005048022 A1 DE102005048022 A1 DE 102005048022A1
- Authority
- DE
- Germany
- Prior art keywords
- sensor
- section
- cross
- screen
- measuring head
- 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.)
- Ceased
Links
- 238000001514 detection method Methods 0.000 claims description 11
- 239000004973 liquid crystal related substance Substances 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 3
- 239000003086 colorant Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
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- 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
-
- 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
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/06—Restricting the angle of incident light
-
- 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
-
- 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
-
- 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
- G01J3/0262—Constructional arrangements for removing stray light
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
Description
Die Erfindung betrifft einen Messkopf für ein Leuchtdichte- und/oder Chroma-Messgerät, der mindestens einen Sensor zur Erfassung der Leuchtdichte und/oder Farbwerte des Lichts einer Lichtquelle und eine Blende aufweist, wobei das Erfassungsfeld des Sensors im Wesentlichen quadratisch ausgebildet ist und die Blende den Lichteinfallswinkel zum Sensor begrenzt. Darüber hinaus betrifft die Erfindung ein Leuchtdichte- und/oder Chroma-Messgerät mit einem derartigen Messkopf.The The invention relates to a measuring head for a luminance and / or chroma meter, the at least a sensor for detecting the luminance and / or color values of Light of a light source and a diaphragm, wherein the detection field of the Sensor is formed substantially square and the aperture limits the angle of incidence to the sensor. In addition, the invention relates a luminance and / or chroma meter with such a measuring head.
Um die Leuchtdichte z. B. eines auf einem LCD-Displaymodul darstellbaren Bildes zu ermitteln, wird gewöhnlich ein Leuchtdichte-Messgerät eingesetzt. Dazu erfasst ein Messkopf zunächst ein optisches Bildsignal des LCD-Displaymoduls, wobei der Messkopf dieses Signal in ein elektrisches Signal umwandelt und dem Leuchtdichte-Messgerät zuführt. Der Messkopf weist für jede zu erfassende R-, G-, B-Farbe einen Sensor auf, dessen Erfassungsfeld im Wesentlichen quadratisch ausgebildet ist. Um zu gewährleisten, dass im Wesentlichen nur die vom LCD-Displaymodul senkrecht abgestrahlten Lichtstrahlen erfasst werden, wodurch die maximale Leuchtdichte des Lichts messbar ist, ist für jeden Sensor eine Blende mit kreisförmigem Querschnitt vorgesehen, welche den Lichteinfallswinkel zum Sensor begrenzt. Dieser Lichteinfallswinkel liegt gewöhnlich in einem Bereich von 4 Grad bis 6 Grad. Dadurch, dass die Blende mit einem kreisförmigen Querschnitt versehen ist, das Erfassungsfeld des Sensors allerdings quadratisch ausgebildet ist, sind die vom LCD-Displaymodul abgestrahlten Lichtstrahlen vom Sensor nicht vollständig erfassbar.Around the luminance z. B. one displayed on an LCD display module Getting a picture becomes common a luminance meter used. For this purpose, a measuring head first detects an optical image signal of the LCD display module, with the probe turning this signal into an electrical Convert signal and feed it to the luminance meter. The measuring head assigns for each detecting R, G, B color a sensor whose detection field is formed substantially square. To ensure, that essentially only those radiated vertically by the LCD display module Beams of light are detected, increasing the maximum luminance of the light is measurable for each sensor provides a diaphragm of circular cross-section, which limits the angle of incidence to the sensor. This angle of incidence is usually in a range of 4 degrees to 6 degrees. Because of the aperture with a circular cross-section is provided, the detection field of the sensor, however, square is formed, the radiated from the LCD display module light rays not completely from the sensor detectable.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Messkopf der eingangs genannten Art zu schaffen, mit welchem eine verbesserte Erfassung der Leuchtdichte ermöglicht wird.Of the present invention is based on the object, a measuring head of the type mentioned above, with which an improved Capture of the luminance allows becomes.
Darüber hinaus ist ein Leuchtdichte- und/oder Chroma-Messgerät mit einer verbesserten Messeigenschaft anzugeben.Furthermore is a luminance and / or chroma meter with an improved metering feature specify.
Diese Aufgabe wird im Hinblick auf den Messkopf dadurch gelöst, dass der Blendenquerschnitt im Wesentlichen dem Querschnitt des Erfassungsfeldes angepasst ist. Im Hinblick auf das Leuchtdichte- und/oder Chroma-Messgerät wird diese Aufgabe durch die im Anspruch 3 angegebenen Maßnahmen gelöst.These The task is solved with regard to the measuring head, that the diaphragm cross section substantially the cross section of the detection field is adjusted. With regard to the luminance and / or chroma meter this is Problem solved by the measures specified in claim 3.
Vorteilhaft ist, dass die erfassbaren Lichtstrahlen um ca. 21% erhöht werden, was bedeutet, dass die vom LCD-Displaymodul abgestrahlten Lichtstrahlen vom Sensor im Wesentlichen vollständig erfasst werden.Advantageous is that the detectable light rays are increased by about 21%, which means that the light rays emitted by the LCD display module Essentially completely detected by the sensor.
In einer Ausgestaltung der Erfindung weist die Blende mehrere aneinander angeordnete Elemente mit quadratischem oder wabenförmigem Querschnitt auf. Jedes Element begrenzt den Lichteinfallswinkel zum Sensor, wodurch die Bauhöhe der Blende im Vergleich zu einer einteiligen quaderförmigen Blende vermindert werden kann.In According to one embodiment of the invention, the diaphragm has a plurality of contacts arranged elements with square or honeycomb cross section on. Each element limits the angle of light to the sensor, causing the height the aperture compared to a one-piece cuboid aperture can be reduced.
Anhand der Zeichnung, in der ein Ausführungsbeispiel der Erfindung veranschaulicht ist, werden im Folgenden die Erfindung, deren Ausgestaltungen sowie Vorteile näher erläutert.Based the drawing in which an embodiment The invention is illustrated below, the invention, their embodiments and advantages explained in more detail.
Es zeigen:It demonstrate:
Es
wird zunächst
auf
Die
Erfassung der Leuchtdichte wird dadurch verbessert, indem der Blendenquerschnitt
im Wesentlichen dem Querschnitt des Erfassungsfeldes des Sensors
angepasst wird. Dazu wird im Folgenden auf
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510048022 DE102005048022A1 (en) | 2005-10-06 | 2005-10-06 | Measuring head for image luminance and/or chroma measuring device, has screen, where cross section of screen is adjusted to cross section of acquisition field such that light rays are completely detected by sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510048022 DE102005048022A1 (en) | 2005-10-06 | 2005-10-06 | Measuring head for image luminance and/or chroma measuring device, has screen, where cross section of screen is adjusted to cross section of acquisition field such that light rays are completely detected by sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102005048022A1 true DE102005048022A1 (en) | 2007-02-01 |
Family
ID=37650434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200510048022 Ceased DE102005048022A1 (en) | 2005-10-06 | 2005-10-06 | Measuring head for image luminance and/or chroma measuring device, has screen, where cross section of screen is adjusted to cross section of acquisition field such that light rays are completely detected by sensor |
Country Status (1)
Country | Link |
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DE (1) | DE102005048022A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4446372A (en) * | 1981-07-01 | 1984-05-01 | Honeywell Inc. | Detector cold shield |
US4609820A (en) * | 1983-04-07 | 1986-09-02 | Fujitsu Limited | Optical shield for image sensing device |
US5726443A (en) * | 1996-01-18 | 1998-03-10 | Chapman Glenn H | Vision system and proximity detector |
US6320652B1 (en) * | 1999-01-29 | 2001-11-20 | Minolta Co., Ltd. | Optical measuring apparatus |
-
2005
- 2005-10-06 DE DE200510048022 patent/DE102005048022A1/en not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4446372A (en) * | 1981-07-01 | 1984-05-01 | Honeywell Inc. | Detector cold shield |
US4609820A (en) * | 1983-04-07 | 1986-09-02 | Fujitsu Limited | Optical shield for image sensing device |
US5726443A (en) * | 1996-01-18 | 1998-03-10 | Chapman Glenn H | Vision system and proximity detector |
US6320652B1 (en) * | 1999-01-29 | 2001-11-20 | Minolta Co., Ltd. | Optical measuring apparatus |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OAV | Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1 | ||
OP8 | Request for examination as to paragraph 44 patent law | ||
8131 | Rejection |