CN114216653A - Bright room contrast measuring device - Google Patents
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- CN114216653A CN114216653A CN202111235048.7A CN202111235048A CN114216653A CN 114216653 A CN114216653 A CN 114216653A CN 202111235048 A CN202111235048 A CN 202111235048A CN 114216653 A CN114216653 A CN 114216653A
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- 230000003287 optical effect Effects 0.000 claims abstract description 51
- 238000005286 illumination Methods 0.000 claims abstract description 36
- 230000003595 spectral effect Effects 0.000 claims abstract description 36
- 239000013307 optical fiber Substances 0.000 claims description 35
- 229910052736 halogen Inorganic materials 0.000 claims description 12
- 229910052721 tungsten Inorganic materials 0.000 claims description 12
- 239000010937 tungsten Substances 0.000 claims description 12
- 150000002367 halogens Chemical class 0.000 claims description 10
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 7
- 238000003384 imaging method Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 238000002310 reflectometry Methods 0.000 claims description 3
- 229910052724 xenon Inorganic materials 0.000 claims description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- -1 tungsten halogen Chemical class 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 43
- 238000012360 testing method Methods 0.000 abstract description 10
- 239000000523 sample Substances 0.000 description 46
- 238000001228 spectrum Methods 0.000 description 15
- 239000000835 fiber Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 241001085205 Prenanthella exigua Species 0.000 description 3
- 238000004020 luminiscence type Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
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Abstract
The invention belongs to the technical field of display device testing, and particularly relates to a bright room contrast measuring device which comprises a measuring integrating sphere, wherein the integrating sphere is provided with a sample mounting port, a light inlet, a first measuring port and a second measuring port, and a measured sample, an illumination light source, a first measuring device and a second measuring device are correspondingly arranged at each position, wherein the measuring area of the first measuring device corresponds to the central area of the sample mounting port, and the optical axis of the first measuring device and the normal line of the sample plane of the sample mounting port form an included angle of 0-10 degrees; the measuring area of the second measuring device corresponds to the inner surface of one side of the sample mounting opening of the inner wall of the measuring integrating sphere. In addition, a light measuring device assembly is provided, the light inlet I of which is aligned with the light outlet of the first measuring opening and the second measuring opening, respectively. The device can reduce the requirement on the size of the integrating sphere, can ensure the measurement precision, and can calculate and obtain the bright room contrast ratio under the diffuse light with any spectral distribution.
Description
Technical Field
The invention belongs to the technical field of display device testing, and particularly relates to a bright room contrast measuring device.
Background
The bright room contrast is an important parameter for evaluating the display performance of a display device under ambient illumination, and the standard specifies that the ratio of the brightness of a white screen to the brightness of a dark screen of the display screen is measured under specified ambient illumination:
bright room contrast ═ LW+LA)/(LB+LA)，
In the formula: l isWIs the brightness of the white screen of the display screen, LBIs the brightness of the dark state of the display screen,LAis the brightness of light reflected by the display screen under ambient illumination.
The existing testing equipment also adopts an integrating sphere diffuse reflection illumination display device to simulate the ambient illumination condition, then uses a luminosity, radiance or spectrum measuring device to measure the brightness of the surface of the display device, and then calculates to obtain the bright room contrast, but because only the brightness change of the surface of the display device is measured, the measurement result of the existing testing equipment has inevitable measurement error.
Taking a photometric or radiometric measuring device as an example, the testing steps of the existing equipment are as follows:
the first step is as follows: measuring to obtain the illuminance E1 at the light outlet of the illumination integrating sphere;
the second step is that: the brightness L1 of the bright state of the display screen is measured, and the actual L1 is LW+LA+LWA1+LWA2In the formula LWIs the brightness of the white screen of the display screen, LAIs the brightness of the light reflected by the display screen under ambient illumination, LWA1Is the effect of self-luminescence of the display screen, LWA2The effect of the display screen reflecting the ambient light is shown;
the third step: measuring the brightness L2 of the dark state of the display screen, wherein L2 is LB+LA+LBA1+LBA2In the formula LBIs the brightness of the dark state of the display screen, LAIs the brightness of the light reflected by the display screen under ambient illumination, LBA1Is the effect of self-luminescence of the display screen, LBA2The effect of the display screen reflecting the ambient light is shown;
the fourth step: calculating the result that the bright room contrast is L1/L2 when the ambient light illumination is E1;
it is thus seen that the bright room contrast thus measured is in error from the actual value.
Therefore, the results obtained by the existing device have errors, and even if a large integrating sphere is adopted, the errors can be reduced but cannot be avoided.
Disclosure of Invention
The invention aims to provide a bright room contrast measuring device which has high measuring precision and convenient use, can reduce the requirement on the size of an integrating sphere and can ensure the measuring precision.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a bright room contrast measuring device, includes and measures the integrating sphere, should measure even high reflectivity diffuse reflection coating of integrating sphere internal surface spraying, its characterized in that: the integrating sphere is provided with a sample mounting port, a light inlet, a first measuring port and a second measuring port; an illumination light source is arranged at the light inlet, and a first measuring device and a second measuring device are respectively arranged at the first measuring port and the second measuring port, wherein the illumination light source corresponds to the light inlet, the first measuring device corresponds to the first measuring port, and the second measuring device corresponds to the second measuring port; the device also comprises a light measuring device component, wherein a light inlet I of the light measuring device component is respectively aligned with the light outlets of the first measuring port and the second measuring port; the measuring area of the first measuring device corresponds to the central area of the sample mounting opening, and an included angle of 0-10 degrees is formed between the optical axis of the first measuring device and the normal line of the sample plane of the sample mounting opening; the measuring area of the second measuring device corresponds to the measuring inner surface of the inner wall of the measuring integrating sphere, and the measuring inner surface is positioned on one side of the sample mounting opening.
Preferably, a first light barrier for blocking the illumination light source from directly irradiating the sample installation port, the first measurement port and the second measurement port is arranged in the measurement integrating sphere.
Preferably, the light measuring device comprises a light measuring instrument, which is a photometric or radiometric or spectrometric measuring device. The photometric measuring device or the radiometric measuring device or the spectral measuring device is convenient to use, wherein the radiometric measuring device can be a measuring device with special spectral calibration, and can rapidly measure optical parameters with special purposes. In addition, the spectrum measuring device adopting the device can measure various specified luminosity and radiance parameters without switching probes, has no spectrum matching error and high measurement precision, can accurately measure the spectral reflectance of the display screen, can also measure the bright room contrast in any lighting environment, has no spectrum matching error and has high measurement precision.
In a preferred embodiment of the light measuring device, the light measuring device assembly comprises a first light measuring device and a second light measuring device, and the light inlet I is divided into a first light inlet of the first light measuring device and a second light inlet of the second light measuring device, wherein the first light inlet is aligned with the light outlet of the first light measuring device, and the second light inlet is aligned with the light outlet of the second light measuring device. When the device is used, the surface of a sample to be measured is measured by the first optical measuring device, the inner surface of the integrating sphere is measured by the second optical measuring device, the illumination change in the integrating sphere is obtained, the measurement result is corrected, and the accurate bright room contrast value is obtained.
As another preferred embodiment of the light measuring device, the light measuring device has only one third light measuring device, which includes an internal light measuring instrument and a two-in-one fiber bundle, wherein the tail of the two-in-one fiber bundle is divided into a first fiber and a second fiber; the front end of the one-to-two optical fiber bundle is an optical fiber light outlet which is right opposite to the optical measuring instrument, the light inlet I comprises a first optical fiber light inlet at the tail end of a first optical fiber and a second optical fiber light inlet at the tail end of a second optical fiber, and the first optical fiber light inlet and the second optical fiber light inlet are respectively right opposite to the light outlets of the first measuring device and the second measuring device; in addition, a first optical shutter is arranged between the light inlet of the first optical fiber and the light outlet of the first measuring device, and a second optical shutter is arranged between the light inlet of the second optical fiber and the light outlet of the second measuring device. The third light measuring device with the light receiving port can save the using amount of the light measuring device and the equipment cost. When the device is used, the first optical gate is opened, the second optical gate is closed, the optical parameter of the surface of the sample to be measured is measured, then the first optical gate is closed, the second optical gate is opened, the optical parameter of the inner surface of the integrating sphere is measured, and finally the contrast of the bright room is measured. The same device is used for measuring the two indexes respectively, and finally obtained parameters cannot generate corresponding errors due to different testing equipment.
Preferably, the first measuring device and the second measuring device are the same, and each is an imaging device including a lens or a lens group. The same measuring device can ensure the measuring precision, and the imaging device adopting the lens or the lens group receives the optical signal to reduce the stray light influence and improve the measuring precision.
Preferably, the measurement integrating sphere is provided with a light trap, and a central optical axis of the light trap and an optical axis of the first measurement device are symmetrical with respect to a normal of a sample mounting plane of the sample mounting port. The influence of specular reflection light can be eliminated by adopting the light trap, and the non-specular reflection light measurement is realized.
As a preferable embodiment of the illumination light source, the illumination light source comprises one or more tungsten halogen lamps. The halogen tungsten lamp has continuous spectrum, stable light emission and improved measurement accuracy, and when the device is used, a dimming color filter can be arranged on an emergent light path of the halogen tungsten lamp to change the spectral distribution of emergent light and improve the measurement accuracy, wherein the dimming color filter can be a color-rising temperature filter.
As another preferable scheme of the illumination light source, the illumination light source comprises at least one halogen tungsten lamp and an LED lamp, and the wavelength range of the LED is between 360nm and 500 nm. The halogen tungsten lamp has continuous spectrum, stable light emission and improved measurement accuracy, while the LED lamp can supplement the spectrum signal of the halogen tungsten lamp in the short-wave spectrum band and improve the measurement accuracy, and the LED lamp can be one or a combination of a plurality of LEDs with the wavelength range of 360nm-500 nm.
As another preferred scheme of the illumination light source, the illumination light source comprises a xenon lamp, the xenon lamp has spectral distribution close to the sun, and the measurement precision is high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a first embodiment of a bright room contrast measuring device provided in the present invention;
fig. 2 is a second embodiment of the bright room contrast measuring device provided by the present invention.
In the figure, a measurement integrating sphere 1, an illumination light source 2, a first measurement device 3, a second measurement device 4, a first optical measurement device 5, a second optical measurement device 6, a sample 7 to be measured, a third optical measurement device 8, a two-into-one optical fiber bundle 9, a sample mounting port 11, a light inlet port 12, a first measurement port 13, a second measurement port 14, a first light blocking screen 15, an inner surface 16, a first optical shutter 17, a second optical shutter 18, a light trapping well 19, an optical measurement instrument 81, a first optical fiber 91, and a second optical fiber 92.
Detailed Description
Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.
The invention provides two specific embodiments of a bright room contrast measuring device, wherein fig. 1 is a first embodiment, in the embodiment, the bright room contrast measuring device comprises a measuring integrating sphere 1, and a uniform high-reflectivity diffuse reflection coating is sprayed on the inner surface of the measuring integrating sphere 1. The integrating sphere 1 is provided with a sample mounting port 11, a light inlet 12, a first measuring port 13 and a second measuring port 14; the light inlet 12 is provided with an illumination light source 2, and a first light blocking screen 15 for blocking the illumination light source 2 from directly irradiating the sample installation opening 11, the first measurement opening 13 and the second measurement opening 14 is arranged in the measurement integrating sphere 1, specifically, the first light blocking screen 15 is positioned on the inner side of the light inlet 12 and directly faces the illumination light source 2 on the outer side of the light inlet 12. A first measuring device 3 and a second measuring device 4 are respectively arranged at the first measuring port 13 and the second measuring port 14, wherein the illumination light source 2 corresponds to the light inlet 12, the first measuring device 3 corresponds to the first measuring port 13, and the second measuring device 4 corresponds to the second measuring port 14; the device also comprises a light measuring device assembly, wherein the light inlet I of the light measuring device assembly is respectively aligned with the light outlet of the first measuring port 13 and the second measuring port 14; the measuring area of the first measuring device 3 corresponds to the central area of the sample mounting port 11, and an included angle alpha between the optical axis of the first measuring device 3 and the normal of the sample plane of the sample mounting port 11 is 8 degrees; the measurement area of the second measurement device 4 corresponds to a measurement inner surface 16 of the inner wall of the measurement integrating sphere 1, which is located on the side of the sample mounting port 11.
In particular, the first measuring device 3 and the second measuring device 4 are identical and are each an imaging device comprising a lens or a set of lenses. The same measuring device can ensure the measuring precision, and the imaging device adopting the lens or the lens group receives the optical signal to reduce the stray light influence and improve the measuring precision. Regarding the illumination light source 2, in the present embodiment, a halogen tungsten lamp is selected, which has a continuous spectrum, stable light emission and can improve the measurement accuracy, and when in use, a color temperature raising filter can be arranged on the exit light path of the halogen tungsten lamp to change the spectrum distribution of the exit light, thereby improving the measurement accuracy. In addition, an LED lamp can be added, the wavelength range of the LED is 360nm to 500nm, and in practical use, an LED lamp with one wavelength can be selected optionally, and in this embodiment, a 400nm LED lamp is selected, or a plurality of LED lamps in the wavelength range can be selected for use in combination. The halogen tungsten lamp and the LED lamp are combined for use, wherein the LED lamp can supplement the spectrum signal of the halogen tungsten lamp in a short-wave spectrum section, and the measurement precision is further improved.
In addition, the measurement integrating sphere 1 is further provided with a light trap 19, and a central optical axis of the light trap 19 and an optical axis of the first measurement device 3 are symmetrical with respect to a normal line of the sample mounting plane of the sample mounting port 11, that is, an included angle α of 8 ° is maintained between the central optical axis of the light trap 19 and the normal line of the sample mounting plane of the sample mounting port 11. The influence of specular reflection light can be eliminated by using the trap 19, and the non-specular reflection light measurement can be realized.
The optical measuring device component comprises an optical measuring instrument, and the optical measuring instrument specifically adopts a photometric measuring device, and also can adopt a radiometric measuring device or a spectral measuring device. Whether it is a photometric or radiometric or spectroscopic measuring device, it is convenient to use and if a radiometric measuring device is selected, it can be specifically selected for use with a special spectral calibration, which can quickly determine the special-purpose optical parameters. In addition, the spectrum measuring device adopting the device can measure various specified luminosity and radiance parameters without switching probes, has no spectrum matching error and high measurement precision, can accurately measure the spectral reflectance of the display screen, can also measure the bright room contrast in any lighting environment, has no spectrum matching error and has high measurement precision.
As shown in fig. 1, in the first embodiment, the light measuring device assembly includes a first light measuring device 5 and a second light measuring device 6, wherein the light measuring instruments in the first light measuring device 5 and the second light measuring device 6 may select a luminance meter for measuring luminance or a radiance meter for measuring radiance or a spectral radiance meter for measuring spectral radiance. The light input I is divided into a first light input of the first light measuring device 5 and a second light input of the second light measuring device 6, wherein the first light input is aligned with the light output of the first light measuring device 3 and the second light input is aligned with the light output of the second light measuring device 4. When the device is used, the surface of a sample 7 to be measured is measured by the first light measuring device 5, the inner surface 16 of the integrating sphere 1 is measured by the second light measuring device 6, the illumination change in the integrating sphere 1 is obtained, and the measurement result is corrected to obtain an accurate bright room contrast value.
Fig. 2 shows a second embodiment, which differs from the first embodiment in that the optical measuring device assembly in the second embodiment comprises only one third optical measuring device 8, which has an optical measuring instrument 81 and a two-split fiber bundle 9, wherein the two-split fiber bundle 9 is divided into a first fiber 91 and a second fiber 92 at the end; the front end of the one-to-two optical fiber bundle 9 is an optical fiber light outlet which is right opposite to the optical measuring instrument 81, the light inlet I comprises a first optical fiber light inlet at the tail end of a first optical fiber 91 and a second optical fiber light inlet at the tail end of a second optical fiber 92, and the first optical fiber light inlet and the second optical fiber light inlet are respectively right opposite to the light outlets of the first measuring device 3 and the second measuring device 4; further, a first shutter 17 is provided between the first fiber entrance and the exit of the first measuring device 3, and a second shutter 18 is provided between the second fiber entrance and the exit of the second measuring device 4. The use of the third light measuring device 8 having 2 light receiving ports can save the amount of the light measuring device and the cost of the apparatus. When the device is used, the first optical gate is opened, the second optical gate is closed, the optical parameter of the surface of the sample to be measured is measured, then the first optical gate is closed, the second optical gate is opened, the optical parameter of the inner surface 16 of the integrating sphere 1 is measured, and finally the bright room contrast is measured. The same device is used for measuring the two indexes respectively, and finally obtained parameters cannot generate corresponding errors due to different testing equipment.
The bright room contrast measuring apparatus in example 1 was used as a test apparatus.
In use, the illumination light source 2 is turned on, the standard white board is first mounted on the sample mounting opening 11, and the first light measuring device 5 and the second light measuring device 6 measure the spectral distribution L of the standard white board0(lambda) and the spectral distribution L of the inner surface 16 of the inner wall of the integrating sphere 1 near the sample-receiving opening 11r0(λ), wherein the standard white board used for the test is a known spectral reflectance ρ (λ) and a luminance coefficient K0The diffuse reflection white board of (1); then removing the standard white board, installing the tested sample 7 to the sample installing port, enabling the tested sample 7 not to emit light, and testing the spectral distribution L of the surface of the tested sample 71(lambda) and the spectral distribution L of the inner surface 16 of the inner wall of the measurement integrating sphere 1 near the sample-mounting port 11r1(lambda), then the sample 7 is lighted up, and the spectral distribution L of the surface of the sample 7 is measured when the white screen is displayed2(lambda) and measuring the spectral distribution L of the inner surface 16r2(lambda), and finally, measuring the spectral distribution L of the surface of the sample 7 to be measured during the black screen3(λ) and the spectral distribution L of the inner surface 16r3(λ)。
After the above test procedure is completed, the following results can be obtained:
L0(λ)＝E(λ)*ρ(λ)*K0- - (O- -X- -O) - -formula 1
Lr0(λ)＝E(λ)*ρ1(λ)*K1- - (O- -X- -O) - -formula 2
L1(λ)＝E1(λ)*ρD(lambda) K-formula 3
Lr1(λ)＝E1(λ)*ρ1(λ)*K1- - (O- -O) - -formula 4
L2(λ)＝LW(λ)+ρDW(λ)*E2(λ)*KW- - (Y- -O) - -formula 5
Lr2(λ)＝E2(λ)*ρ1(λ)*K1- - (Y- -O) - -formula 6
L3(λ)＝LB(λ)+ρDB(λ)*E3(λ)*KB- - -formula 7
Lr3(λ)＝E3(λ)*ρ1(λ)*K1- - -formula 8
The following formulas 1, 2, 3 and 4 can obtain:
the spectral radiance factor of the measured sample is
ρD(λ)*K＝(ρ(λ)*K0)*(Lr0(λ)*L1(λ))/(Lr1(λ)*L0(λ))；
From the formulae 1, 2, 6 and 8, E can be obtained2(λ)、E3(λ)，
These are substituted for formula 5 and formula 7, respectively, to give ρDW(λ)*KW，ρDB(λ)*E3(λ)*KB，
From this, the bright room contrast under diffuse illumination of arbitrary spectral distribution can be calculated:
assume that the spectral irradiance distribution of the illumination source is ES(λ)，
If the spectral radiance factor of the measured sample does not change with the lighting state:
bright room contrast ═ LW+LA)/(LB+LA)
In the formula: l isW＝∑LW(λ)*V(λ)*△λ
LB＝∑LB(λ)*V(λ)*△λ
LA＝∑(ρD(λ)*K*ES(λ)*△λ)
If the spectral radiance factor of the measured sample changes with the lighting state:
bright room contrast ═ LW+LAW)/(LB+LAB)
In the formula: l isW＝∑LW(λ)*V(λ)*△λ
LB＝∑LB(λ)*V(λ)*△λ
LAW＝∑(ρDW(λ)*KW*ES(λ)*△λ)
LAB＝∑(ρDB(λ)*KB*ES(λ)*△λ)
In the formula: e (lambda) is the spectral radiant illumination of the surface of the standard white board，E1(lambda) is the spectral irradiance of the surface of the sample to be measured when it is not lit, E2(lambda) is the spectral radiance of the surface when the white screen is illuminated by the sample to be measured, E3(lambda) is the spectral radiance of the surface when the black screen is lighted on the sample to be measured, K0Is the standard white board luminance coefficient (known), K1To measure the luminance coefficient, p, at the inner surface 16 of the integrating sphere 11To measure the spectral reflectance, ρ, at the inner surface 16 of the integrating sphere 1D(lambda) is the spectral reflectance of the surface when the sample is not emitting light, K is the luminance coefficient when the sample is not emitting light, and rhoDW(lambda) is the spectral reflectance of the surface of the sample to be measured in the bright white screen, KWIs the brightness coefficient rho of the tested sample in the bright white screenDB(lambda) is the spectral reflectance of the surface of the measured sample in the bright black screen, KBIs the brightness coefficient L of the tested sample in bright state and black screenW(lambda) is the spectral radiance of the bright white screen of the display measured in a dark room, LBAnd (lambda) is the spectral radiance of the bright black screen of the display screen measured in a dark room.
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a bright room contrast measuring device, includes and measures the integrating sphere, should measure even high reflectivity diffuse reflection coating of integrating sphere internal surface spraying, its characterized in that: the integrating sphere is provided with a sample mounting port, a light inlet, a first measuring port and a second measuring port; an illumination light source is arranged at the light inlet, and a first measuring device and a second measuring device are respectively arranged at the first measuring port and the second measuring port, wherein the illumination light source corresponds to the light inlet, the first measuring device corresponds to the first measuring port, and the second measuring device corresponds to the second measuring port; the device also comprises a light measuring device component, wherein a light inlet I of the light measuring device component is respectively aligned with the light outlets of the first measuring port and the second measuring port; the measuring area of the first measuring device corresponds to the central area of the sample mounting opening, and an included angle of 0-10 degrees is formed between the optical axis of the first measuring device and the normal line of the sample plane of the sample mounting opening; the measuring area of the second measuring device corresponds to the measuring inner surface of the inner wall of the measuring integrating sphere, and the measuring inner surface is positioned on one side of the sample mounting opening.
2. A bright room contrast measuring device as claimed in claim 1, wherein: a first light blocking screen for blocking the illumination light source from directly irradiating the sample installation port, the first measuring port and the second measuring port is arranged in the measuring integrating sphere.
3. A bright room contrast measuring device as claimed in claim 1, wherein: the light measuring device comprises a light measuring instrument which is a photometric measuring device or a radiometric measuring device or a spectral measuring device.
4. A bright room contrast measuring device as claimed in claim 3, wherein: the light measuring device assembly comprises a first light measuring device and a second light measuring device, and the light inlet I is divided into a first light inlet of the first light measuring device and a second light inlet of the second light measuring device, wherein the first light inlet is aligned with the light outlet of the first measuring device, and the second light inlet is aligned with the light outlet of the second measuring device.
5. A bright room contrast measuring device as claimed in claim 3, wherein: the optical measuring device is only provided with a third optical measuring device which comprises an internal optical measuring instrument and a one-to-two optical fiber bundle, wherein the tail part of the one-to-two optical fiber bundle is divided into a first optical fiber and a second optical fiber; the front end of the one-to-two optical fiber bundle is an optical fiber light outlet which is right opposite to the optical measuring instrument, the light inlet I comprises a first optical fiber light inlet at the tail end of a first optical fiber and a second optical fiber light inlet at the tail end of a second optical fiber, and the first optical fiber light inlet and the second optical fiber light inlet are respectively right opposite to the light outlets of the first measuring device and the second measuring device; in addition, a first optical shutter is arranged between the light inlet of the first optical fiber and the light outlet of the first measuring device, and a second optical shutter is arranged between the light inlet of the second optical fiber and the light outlet of the second measuring device.
6. A bright room contrast measuring device as claimed in claim 1, wherein: the first measuring device and the second measuring device are the same and are both imaging devices comprising a lens or a lens group.
7. A bright room contrast measuring device as claimed in claim 1, wherein: the measuring integrating sphere is provided with a light trap, and the central optical axis of the light trap is symmetrical to the normal of the optical axis of the first measuring device relative to the sample mounting plane of the sample mounting port.
8. A bright room contrast measuring device as claimed in any one of claims 1 to 7, wherein: the illumination source comprises one or more tungsten halogen lamps.
9. A bright room contrast measuring device as claimed in any one of claims 1 to 7, wherein: the lighting source comprises at least one halogen tungsten lamp and an LED lamp, and the wavelength range of the LED is between 360nm and 500 nm.
10. A bright room contrast measuring device as claimed in any one of claims 1 to 7, wherein: the illumination light source comprises a xenon lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111235048.7A CN114216653B (en) | 2021-10-22 | Bright room contrast measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111235048.7A CN114216653B (en) | 2021-10-22 | Bright room contrast measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN114216653A true CN114216653A (en) | 2022-03-22 |
| CN114216653B CN114216653B (en) | 2024-10-29 |
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