CN212340439U - Large-diameter light-splitting color photometer - Google Patents
Large-diameter light-splitting color photometer Download PDFInfo
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- CN212340439U CN212340439U CN202021236096.9U CN202021236096U CN212340439U CN 212340439 U CN212340439 U CN 212340439U CN 202021236096 U CN202021236096 U CN 202021236096U CN 212340439 U CN212340439 U CN 212340439U
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Abstract
The utility model discloses a large-caliber light splitting and color measuring instrument, which comprises a light source, a sensing system and an integrating sphere, the slit arranged on the integrating sphere is matched with the specular reflection piece, the measuring port and the first optical fiber on the outer side of the integrating sphere, light of the light source is emitted through the slit after being homogenized in the integrating sphere and is transmitted to the sensing system through the specular reflection piece, the measuring port and the first optical fiber in sequence, and as the light is fully reflected in the integrating sphere, the intensity of the light exiting the slit is equal in all directions, the bulky sensing system originally placed at the light entrance of the first optical fiber is placed outside the light path structure through the first optical fiber, thereby avoiding the influence of the sensing system on the whole light path structure, facilitating the whole structure design, and simultaneously, the sensing system can use a larger spectrometer to receive signals, and the purpose of measuring the spectral information of the reflected light on the surface of the measured object is achieved.
Description
Technical Field
The invention relates to the technical field of optical color measurement, in particular to a large-caliber light-splitting color photometer.
Background
The 45/0 illumination observation in the color measurement instrument is that the light direction is 45 deg. from the surface and the observer receives a signal from the 0 deg. direction. At present, there are two technical schemes for realizing 45/0 lighting observation geometric conditions:
And in the scheme 2, an integrating sphere hemisphere is adopted for light homogenizing, the bottom of the integrating sphere hemisphere is a circular plane, the inner surface of the integrating sphere hemisphere is a high-reflection mirror surface, a circle of plane edge is provided with a slit, and light emitted by a light source irradiates the surface of the material at an angle of 45 degrees from the slit after the light is homogenized in the integrating sphere hemisphere. Although more uniform illumination can be realized compared with the scheme 1, the light-homogenizing effect is poor due to the integrating sphere hemisphere, and certain illumination directional errors can still be caused; and the sensor in the 0-degree direction at the lower part of the hemispherical bottom surface of the integrating sphere has larger volume and can block light. In order to prevent light rays from being blocked, the volume of the light path structure is increased, so that the whole volume of the light path structure is larger; the space occupied by the sensor is reduced, so that the sensor can only select a photocell with a small volume, and the space is insufficient for placing a spectrometer, so that the spectral measurement cannot be realized.
Disclosure of Invention
For solving the not enough of prior art, make the unrestricted purpose in measurement space when realizing abundant even light, abundant illumination, luminous intensity unanimity, the utility model discloses a following technical scheme:
a large-aperture color spectrometer comprises a light source, a sensing system and an integrating sphere, wherein a slit arranged on the integrating sphere is matched with a specular reflection part, a measurement port and a first optical fiber on the outer side of the integrating sphere, light of the light source is emitted through the slit after being homogenized in the integrating sphere, and is transmitted to the sensing system through the specular reflection part, the measurement port and the first optical fiber in sequence, and the light is fully reflected in the integrating sphere, the intensity of the light exiting the slit is equal in all directions, the bulky sensing system originally placed at the light entrance of the first optical fiber is placed outside the light path structure through the first optical fiber, thereby avoiding the influence of the sensing system on the whole light path structure, facilitating the whole structure design, and simultaneously, the sensing system can use a larger spectrometer to receive signals, and the purpose of measuring the spectral information of the reflected light on the surface of the measured object is achieved.
The light emitted from the slit forms a 45-degree angle with the reflection surface of the specular reflection piece, the reflection surface of the specular reflection piece forms a 45-degree angle with the measurement surface of the measurement port, and 45/0 lighting optical conditions are guaranteed.
The measuring port and the first optical fiber are matched and provided with a reflector for reflecting the reflected light on the surface of the measured object to enable the reflected light to enter the first optical fiber.
The reflecting mirror is inclined by 45 degrees and is arranged right above the measuring port.
The slit is a closed loop, and a light blocking structure is arranged on the slit and used as a wire channel connected with the sensing system for distributing the first optical fibers.
And a light outlet formed in the integrating sphere is matched with the second optical fiber, and light of the light source is homogenized in the integrating sphere and then transmitted to the sensing system through the second optical fiber through the light outlet.
The sensing system comprises a first sensor and a second sensor, wherein the first sensor is used for receiving and measuring the optical signal of the first optical fiber, and the second sensor is used for receiving and measuring the optical signal of the second optical fiber.
The utility model discloses an advantage and beneficial effect lie in:
through the cooperation setting of slit, specular reflection spare, measurement mouth, first optic fibre, can adopt whole integrating sphere to provide better even light effect when guaranteeing 45/0 illumination optical conditions to outside having put the light path structure with the sensor, solved the sensor and lacked the problem of putting the space.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a sectional view of the mirror reflector of the present invention.
Fig. 3 is a cross-sectional view of the present invention at the optical fiber side.
In the figure: 1. integrating sphere, 2, light source, 3, slit, 4, specular reflection piece, 5, measuring port, 6, light outlet, 7, second optical fiber, 8, first optical fiber, 9, light blocking structure, 10 and reflector.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
As shown in fig. 1-3, light emitted from the light source 2 first enters the integrating sphere 1, and after sufficient light homogenization is performed in the integrating sphere 1, the light intensity distribution inside the integrating sphere 1 is ensured to be uniform.
A circle of slits 3 is opened in a lower portion 1/4 of the integrating sphere 1 so that light rays can be emitted from the integrating sphere 1, the emitted light rays are reflected light from the inner surface area of the integrating sphere 1 in the regions S1 and S2, and the light intensity of the light corresponding to the slits 3 is equal in each direction because the light rays are sufficiently reflected inside the integrating sphere 1.
The light rays are emitted from the slit 3, reflected by the surface of the specular reflection member 4 and pass through the measurement port 5 to the surface of the measured object, a connecting line between the center points of the areas S1 and S2 and the center point of the surface of the specular reflection member 4 is 45 degrees with the surface of the specular reflection member 4, and a connecting line between the center point of the surface of the specular reflection member 4 and the center point of the measurement port 5 (namely the surface of the measured object) is also 45 degrees with the surface of the specular reflection member 4, so that the light rays irradiated to the surface of the measured object are incident in a direction forming an angle of 45 degrees with the surface.
Set up a speculum 10 directly over the testee surface, become 45 with testee surface normal direction for reflect the reflection light on testee surface, make it get into first optic fibre 8, put the great sensor of volume outside the light path structure, thereby avoided the influence of sensor to whole light path structure, made things convenient for overall structure design, simultaneously, the sensor can use the spectrum appearance to accept the signal, reaches the purpose of measuring the spectral information of testee surface reverberation.
A light blocking structure 9 is disposed on the slit 3 as a wire passage for connecting the sensor, and wires such as a first optical fiber 8 are disposed.
After the first optical fiber 8 collects the optical signal carrying the spectral information of the surface of the object to be measured, the optical signal is guided into the spectrometer, and the intensity of the spectral signal at each wavelength is measured
。
The second optical fiber 7 is directly connected to the inner wall of the integrating sphere 1 through the light outlet 6, after the optical signal in the integrating sphere 1 is collected, the optical signal is guided into another spectrometer through the second optical fiber 7, and because the optical signal is not reflected by the surface of the object to be measured, the optical signal does not carry spectral information of the surface of the object to be measured, and only spectral information of a light source is available, the intensity of the spectral signal at each wavelength can be measured
。
GetI 
Is the final reflection spectrum intensity of the surface of the measured object, if the light source spectrum signal fluctuates,
and
fluctuation of corresponding proportion occurs, and the influence of the fluctuation of the light source on measurement can be effectively eliminated through the final reflection spectrum intensity obtained through calculation.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (7)
1. The utility model provides a heavy-calibre beam split colorimeter, its characterized in that includes light source (2), sensing system, integrating sphere (1) on set up slit (3) and integrating sphere (1) outside specular reflection spare (4), measurement mouth (5), first optic fibre (8) cooperation setting, the light of light source (2) is penetrated through slit (3) after the even light in integrating sphere (1), transmits to sensing system through specular reflection spare (4), measurement mouth (5), first optic fibre (8) in proper order.
2. The large-aperture spectrocolorimeter according to claim 1, wherein a light ray emitted from said slit (3) is 45 ° from a reflection surface of said specular reflection member (4), and a reflection light of said specular reflection member (4) is 45 ° from a measurement surface of said measurement port (5).
3. The large-caliber spectrocolorimeter according to claim 1, wherein a reflecting mirror (10) is disposed between the measuring port (5) and the first optical fiber (8).
4. A large aperture spectrocolorimeter according to claim 3 wherein said mirror (10) is disposed at an angle of 45 ° directly above said measuring port (5).
5. A large aperture spectrocolorimeter according to claim 1 wherein said slit (3) is a closed loop having light blocking structure (9) thereon.
6. The large-aperture spectrocolorimeter according to claim 1, wherein a light outlet (6) formed in the integrating sphere (1) is matched with a second optical fiber (7), and light of the light source (2) is homogenized in the integrating sphere (1) and then transmitted to the sensing system through the second optical fiber (7) through the light outlet (6).
7. A large aperture spectrocolorimeter according to claim 6 wherein said sensing system includes a first sensor for receiving and measuring the light signal from the first optical fiber (8) and a second sensor for receiving and measuring the light signal from the second optical fiber (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021236096.9U CN212340439U (en) | 2020-06-30 | 2020-06-30 | Large-diameter light-splitting color photometer |
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| CN202021236096.9U CN212340439U (en) | 2020-06-30 | 2020-06-30 | Large-diameter light-splitting color photometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707370A (en) * | 2020-06-30 | 2020-09-25 | 中国计量大学 | Large-diameter light-splitting color photometer and color measuring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707370A (en) * | 2020-06-30 | 2020-09-25 | 中国计量大学 | Large-diameter light-splitting color photometer and color measuring method |
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