Spectrum correction type imaging color brightness meter

Abstract

The utility model discloses a spectrum correction type imaging chrominance meter, which is used for improving the test precision and shortening the test time. The color and brightness meter comprises a lens, a color and brightness meter main body and a shaping lens group, the lens is connected to the color and brightness meter main body, and the lens is used for transmitting a light beam into the color and brightness meter main body; a wheel rotating disc and a built-in spectrograph are arranged in the chrominance meter main body, an optical fiber is arranged on the chrominance meter main body, the optical fiber is connected with the built-in spectrograph, a reflecting prism is arranged on the wheel rotating disc, and the wheel rotating disc is controlled to rotate so that the reflecting prism can be arranged at the position corresponding to the lens. The reflecting prism is used for reflecting the light beam; the shaping lens group is arranged on a light path of the light beam path and used for converging the light beams into parallel light beams, and the parallel light beams irradiate the end face of the optical fiber.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of colorimeters, in particular to an imaging color brightness meter with spectral correction. BACKGROUND

[0002] The imaging color brightness meter is an important device for measuring the color coordinates and brightness of an object. Specifically, the imaging color brightness meter uses a color camera to take a picture of the object to be measured, extracts the RGB components of each pixel in the picture of the object to be measured, and converts them into color coordinates (XYZ) through software algorithm operation, so that the color coordinates of the entire picture can be quickly extracted, and the measurement efficiency is relatively high.

[0003] However, due to the inherent error of the conversion algorithm itself and the precision of the camera, the error of the measurement result is relatively large, and it is difficult to meet the application scenarios with strict requirements for high-precision measurement, such as color calibration of high-end electronic products and detection of precision optical instruments. In order to improve the measurement precision, the prior art arranges a mirror (plane or prism) between the lens and the camera CMOS (image sensor), and guides the incident light at the center of the picture into a spectrometer through an optical fiber, uses the spectrometer to accurately analyze and calculate the color coordinates of the center point, and then feeds back and corrects the color coordinates of the picture calculated by the entire camera, thereby effectively improving the overall precision.

[0004] However, in the imaging color brightness meter with spectral correction, that is, in the imaging color brightness meter with an embedded spectrometer, the imaging lens of the camera is usually shared, and the imaging lens is only designed from the imaging angle, so that the light flux entering the optical fiber is low, which leads to a significant extension of the test time and poor test precision when measuring the spectrum of a sample with low brightness. CONTENT OF THE INVENTION

[0005] In order to solve the above technical problems, the present application provides an imaging color brightness meter with spectral correction, which can improve the test precision and shorten the test time.

[0006] The imaging color brightness meter with spectral correction provided by the present application comprises:

[0007] a lens, a color brightness meter body, and a shaping mirror group; the lens is connected to the color brightness meter body, and the lens is used to transmit a light beam into the color brightness meter body;

[0008] A rotating disc and an embedded spectrometer are arranged in the color brightness meter body, an optical fiber is arranged on the color brightness meter body, the optical fiber is connected to the embedded spectrometer, a reflecting prism is arranged on the rotating disc, the rotating disc is controlled to rotate so that the reflecting prism is placed at a position corresponding to the lens, and the reflecting prism is used to reflect the light beam;

[0009] The shaping mirror group is arranged on the light path of the light beam path, and is used for converging the light beam to form parallel light beams, which irradiate on the end face of the optical fiber.

[0010] Optionally, the rotating disc is provided with a fixing plate, the reflecting prism is fixed on the fixing plate, and the shaping mirror group is fixedly connected to the fixing plate, and when the reflecting prism is placed at the position corresponding to the lens, the shaping mirror group is located between the reflecting prism and the optical fiber.

[0011] Optionally, the shaping mirror group is connected to the reflecting prism, and the shaping mirror group is located on the side of the reflecting prism facing the lens, so that the light beam reaches the reflecting prism after being shaped by the shaping mirror group.

[0012] Optionally, the shaping mirror group is arranged in the lens.

[0013] Optionally, the shaping mirror group comprises a convex lens and a concave lens, the convex lens and the concave lens are parallel to each other, and the convex lens is located in front of the concave lens, so that the light beam passes through the convex lens and the concave lens in sequence.

[0014] Optionally, the convex lens is a single-face convex lens or a double-face convex lens.

[0015] Optionally, the concave lens is a single-face concave lens or a double-face concave lens.

[0016] Optionally, the shaping mirror group further comprises a fixing seat, the fixing seat is provided with a through hole, and the convex lens and the concave lens are fixed in the through hole.

[0017] Optionally, a gap is arranged between the convex lens and the concave lens.

[0018] Optionally, the rotating disc is provided with a shooting lens, the shooting lens is adjacent to the reflecting prism, the rotating disc is controlled to rotate so that the shooting lens is coaxial with the lens, and the light beam reaches the light processing module in the color brightness meter after passing through the shooting lens.

[0019] Optionally, the cross-sectional diameter of the parallel light beams is greater than or equal to the end face diameter of the optical fiber.

[0020] From the above technical solutions, the present application has the following effects:

[0021] The present application is when the reflecting prism is placed in the corresponding position of the lens, the light beam will irradiate on the reflecting prism, the reflecting prism is used for reflecting the light beam, the shaping lens group is arranged in the light path of the light beam path, the light path includes the light path between the optical fiber and the reflecting prism, the light path between the reflecting prism and the lens and the light path in the lens, the light beam is condensed and shaped into parallel light beam after passing through the shaping lens group, the formed parallel light beam irradiates on the end face of the optical fiber, the parallel light beam is introduced into the built-in optical spectrum analyzer by the optical fiber for analysis and measurement, the brightness of the convergent parallel light beam is improved, the high-brightness small spot is irradiated on the end face of the optical fiber, thereby the light flux entering the built-in optical spectrum analyzer is improved, the test time is reduced, and the test precision is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0023] Figure 1 A schematic diagram of the imaging color brightness meter of the present application;

[0024] Figure 2 Another schematic diagram of the imaging color brightness meter of the present application;

[0025] Figure 3 Another schematic diagram of the imaging color brightness meter of the present application;

[0026] Figure 4 A schematic diagram of the present application when the shaping lens group is arranged between the optical fiber and the reflecting prism;

[0027] Figure 5 An exploded schematic diagram of the present application when the shaping lens group is arranged between the optical fiber and the reflecting prism;

[0028] Figure 6 A schematic diagram of the present application when the shaping lens group is arranged between the reflecting prism and the lens;

[0029] Figure 7 A schematic diagram of the present application when the shaping lens group is arranged in the lens;

[0030] Among them, the lens 01, the color brightness meter body 02, the shaping lens group 03, the rotating disc 04, the shooting lens 05, the reflecting prism 06, the optical fiber 07, the driving motor 08, the belt 09, the fixed plate 10, the convex part 11, the convex lens 12, the concave lens 13, the fixed seat 14, the lens seat 15, the optical fiber seat 16. DETAILED DESCRIPTION

[0031] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings, and are used only to illustrate the relative positional relationship between the components or constituent parts, and do not particularly limit the specific installation orientation of the components or constituent parts.

[0032] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0033] In addition, the terms "mounting", "setting", "provided with", "connected", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or constituent parts. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0034] In addition, the structure, proportion, size, etc. shown in the drawings attached in the present application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the limiting conditions of the present application, and therefore do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, still falls within the scope of the technical content disclosed by the present application.

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0036] The present application provides an imaging color brightness meter for spectral correction, which is used to improve the test precision and shorten the test time. The specific implementation process of the present application is described as follows.

[0037] Please refer to Figures 1 to 7 The imaging color brightness meter for spectral correction provided by the present application comprises:

[0038] Lens 01, color brightness meter body 02 and shaping lens group 03; lens 01 is connected to color brightness meter body 02, lens 01 is used for transmitting light beams into color brightness meter body 02; color brightness meter body 02 is provided with a rotating disc 04 and an internal spectrometer, color brightness meter body 02 is provided with an optical fiber 07, the optical fiber 07 is connected with the internal spectrometer, the rotating disc 04 is controlled to rotate, so that the reflecting prism 06 is placed in the corresponding position of the lens 01, the reflecting prism 06 is used for reflecting the light beam; the shaping lens group 03 is arranged on the light path of the light beam, and the shaping lens group 03 is used for converging the light beam to form a parallel light beam, and the parallel light beam is irradiated on the end face of the optical fiber 07.

[0039] One end of lens 01 is connected with color brightness meter body 02, which can be connected by thread rotation, buckle connection and the like, and the other end faces the measured object, which can effectively collect and transmit the light beams emitted from the surface of the measured object, and the light beams emitted from the measured object enter the lens 01, which guides the light beams into the color brightness meter body.

[0040] The color brightness meter body is also provided with a light processing module, and the rotating disc 04 is also provided with a shooting lens 05, the shooting lens 05 is adjacent to the reflecting prism 06, the rotating disc 04 is located between the light processing module and the lens 01, and the rotating disc 04 is controlled to rotate, so that the shooting lens 05 is coaxial with the lens 01, at this time, the light beam reaches the light processing module after passing through the shooting lens 05.

[0041] The color brightness meter body 02 includes two working states, one is a shooting state, and the other is a test state, in the shooting state, the shooting lens 05 on the rotating disc 04 is coaxial (aligned) with the lens 01, at this time, the lens 01, the shooting lens 05 and the light processing module are coaxial, so that the light beam can pass through the shooting lens 05 and reach the light processing module; in the test state, the reflecting prism 06 is rotated to the corresponding position of the lens 01 (the reflecting prism 06 is aligned with the lens 01), at this time, the light beam is emitted from the lens 01 to the reflecting prism 06, the reflecting prism 06 is used for reflecting the light beam at other angles, the reflected light beam is coaxial with the arranged optical fiber 07, which ensures that the reflected light beam can be introduced into the optical fiber 07, so as to be introduced into the internal spectrometer by the optical fiber 07, the optical fiber 07 is used as a transmission medium, and the light beam is introduced into the internal spectrometer with high efficiency and no loss, which ensures the accuracy of the spectrum measurement. The optical fiber 07 is connected to the color brightness meter body 02 through the optical fiber seat 17.

[0042] The switching between the shooting state and the testing state is realized by driving the motor 08 in cooperation with the belt 09. Specifically, the belt 09 is sleeved on the wheel rotating disc 04 and the driving motor 08 at the same time. When the driving motor 08 operates, the wheel rotating disc 04 is driven to rotate by the belt 09. During the rotation of the wheel rotating disc 04, the shooting lens 05 is coaxial with the lens 01, or the reflecting prism 06 moves to a position corresponding to the lens 01 (aligns with each other).

[0043] The shaping lens group 03 is arranged on the light beam transmission path. The shaping lens group 03 is used to correct and converge the light beam output from the lens 01, form a high-brightness parallel light beam, and irradiate a high-brightness light spot on the end face of the optical fiber 07. Thus, the consistency of the directionality and the intensity distribution of the light beam before entering the spectrometer is ensured, the light flux entering the built-in spectrometer is improved, and the angle of the incident light is adjusted to realize rapid and accurate high-precision measurement. The shaping lens group 03 is coaxial with the light beam, that is, the axis of the light beam coincides with the center of the shaping lens group 03. After the light beam is emitted from the measured object, it reaches the end face of the optical fiber after passing through the lens and the reflecting prism. That is, the light beam transmission path is the path of the light beam when it is transmitted between the measured object and the end face of the optical fiber.

[0044] In this embodiment, by arranging the shaping lens group 03 on the light beam transmission path, the shaping lens group 03 converges the light beam to form a parallel light beam. When measuring a sample with low brightness, the low-brightness light beam is converged to form a parallel light beam with higher brightness. The light flux entering the built-in spectrometer is significantly improved, which not only shortens the testing time but also improves the measurement accuracy.

[0045] The originally scattered light beam is adjusted to be a parallel light beam, the angle and distribution of the light beam are adjusted, and the light beam is ensured to enter the optical fiber 07 and the built-in spectrometer with consistent angle, which further improves the measurement accuracy.

[0046] The imaging color brightness meter 02 of the present application can realize rapid and accurate high-precision measurement of color, and meet the needs of high-precision application scenarios such as color calibration of high-end electronic products and detection of precision optical instruments.

[0047] The light beam transmission path includes the transmission path between the reflecting prism 06 and the optical fiber 07, the transmission path between the reflecting prism 06 and the lens 01, and the transmission path in the lens 01. The shaping lens group 03 can be assembled on one of the three transmission paths. The three assembly conditions will be described in detail as follows:

[0048] Embodiment one: please continue to refer to Figures 1-5The fixing plate 10 is arranged on the rotating disc 04, the reflecting prism 06 is fixed on the fixing plate 10, and the shaping lens group 03 is fixedly connected on the fixing plate 10. When the reflecting prism 06 is arranged at a position corresponding to the lens 01, the shaping lens group 03 is located between the reflecting prism 06 and the optical fiber 07. The light beam is converged by the shaping lens group 03 to form a parallel light beam, and the parallel light beam is coaxial with the optical fiber 07.

[0049] The fixing plate 10 is adjacent to the shooting lens 05, and the fixing plate 10 is fixed on the rotating disc 04 by means of screwing / gluing. The reflecting prism 06 is fixed on the fixing plate 10 (connected by one of screwing, bolting, gluing, buckling, etc.). The shaping lens group 03 is also fixed on the fixing plate 10, and the shaping lens group 03 is connected with the fixing plate 10 by one of screwing, bolting, gluing, buckling, etc. The shaping lens group 03 is located in the light beam reflection direction of the reflecting prism 06. The axis of the reflected light beam coincides with the center of the shaping lens group 03, that is, the arrangement direction of the optical fiber 07, the reflected light beam and the shaping lens group 03 are coaxially arranged. The reflecting prism 06 is fixed on the fixing plate 10 by the lens seat 16.

[0050] In the embodiment, the light beam enters the lens 01, is reflected by the reflecting prism 06, is shaped by the shaping lens group 03, forms a high-brightness parallel light beam, and finally irradiates on the end face of the optical fiber 07 and is guided into the built-in optical spectrum analyzer by the optical fiber 07.

[0051] In an optional embodiment, the diameter of the cross section of the formed parallel light beam is greater than or equal to the end face diameter of the optical fiber 07. By setting the diameter of the cross section of the parallel light beam to be greater than the end face diameter of the optical fiber 07, the position offset of the optical fiber 07 and the error of the rotating of the rotating disc 04 are coped with. It is ensured that the parallel light beam can still cover the end face of the optical fiber 07 (the end face of the one end of the optical fiber 07 receiving the parallel light beam) under these errors. For example, the diameter of the end face of the optical fiber 07 is 0.3 mm, and the diameter of the cross section of the parallel light beam is 0.33 mm.

[0052] Embodiment two: please continue to refer to Figure 6 The shaping lens group 03 is connected with the reflecting prism 06, and the shaping lens group 03 is located on the side of the reflecting prism 06 facing the lens 01, so that the light beam is shaped by the shaping lens group 03 and reaches the reflecting prism 06.

[0053] The shaping lens group 03 is arranged in parallel between the rotating disc 04, and the reflecting prism 06 is fixed on the rotating disc 04 by the lens seat 16. The edge of the lens seat 16 is provided with a protruding part 11, and the shaping lens group 03 is transversely connected to the protruding part 11. The shaping lens group 03 and the protruding part 11 are connected by a bolt / screw, and can also be connected by buckling.

[0054] The shaping lens group 03 is arranged on the light path between the reflecting prism 06 and the lens 01. The light beam passes through the shaping lens group 03 before reaching the reflecting prism 06. The light beam is pre-shaped before reflection, reducing the spot distortion on the surface of the reflecting prism 06, and improving the spectral analysis accuracy.

[0055] Embodiment three: please continue to refer to Figure 7 The shaping lens group 03 is arranged in the lens 01. In this embodiment, the light beam directly converges into a parallel light beam through the shaping lens group 03 when passing through the lens 01, and then is reflected to the optical fiber 07 through the reflecting prism 06. By integrating the shaping lens group 03 in the lens 01, the external light path structure can be simplified, and the maintenance cost can be reduced. Moreover, the sealed environment inside the lens 01 can reduce dust pollution and reduce the attenuation of light flux.

[0056] In an optional embodiment, the shaping lens group 03 includes a convex lens 12 and a concave lens 13. The convex lens 12 and the concave lens 13 are parallel to each other, and the convex lens 12 is located in front of the concave lens 13, so that the light beam passes through the convex lens 12 and the concave lens 13 in sequence. In the light beam transmission direction, the incoming direction is the front, and the outgoing direction is the back, so the convex lens 12 receives the light beam first. In this embodiment, the convex lens 12 converges the light beam, and the concave lens 13 adjusts the divergence angle to form a uniform parallel light spot. The two lenses can be connected in a glued manner to form a whole.

[0057] In this optional embodiment, the convex lens 12 is a single-sided convex lens / double-sided convex lens; and / or, the concave lens 13 is a single-sided concave lens / double-sided concave lens.

[0058] In this embodiment, the composition of the shaping lens group 03 includes: ① single-sided convex lens and single-sided concave lens arranged in parallel; ② single-sided convex lens and double-sided concave lens arranged in parallel; ③ double-sided convex lens and single-sided concave lens arranged in parallel; and ④ double-sided convex lens and double-sided concave lens arranged in parallel.

[0059] In an optional embodiment, the shaping lens group 03 further includes a fixing seat 14, and the fixing seat 14 is provided with a through hole. The convex lens 12 and the concave lens 13 are fixed in the through hole.

[0060] The aperture of the through hole matches the outer diameter of the convex lens 12 and the concave lens 13, respectively. The through hole is used to accommodate the convex lens 12 and the concave lens 13, for example, the aperture is 10 mm, and the outer diameter of the convex lens 12 and the concave lens 13 is 9.5 mm.

[0061] The convex lens 12 and the concave lens 13 can be adhered in the through hole by optical glue (such as epoxy resin). The convex lens 12 and the concave lens 13 are aligned with each other, so that the optical axis of the convex lens 12 (the principal axis of the light beam passing through the convex lens 12) coincides with the optical axis of the concave lens 13 (the principal axis of the light beam passing through the concave lens 13).

[0062] In this optional embodiment, a gap is provided between the convex lens 12 and the concave lens 13. In this embodiment, a gap is kept between the convex lens 12 and the concave lens 13, which can be 1 mm, 2 mm, etc., and is determined according to the actual selected lens specification. The gap is used for light beam transmission, ensures that a parallel light beam can be formed after passing through the concave lens 13, and can also buffer the deformation caused by thermal expansion or mechanical stress, allowing the lens to freely expand / contract when the temperature changes, avoiding cracking of the glue layer or optical axis deviation.

[0063] In this optional embodiment, the shaping lens group 03 further includes a compensation lens, which is fixed in the through hole and located between the convex lens 12 and the concave lens 13, and the compensation lens is a convex lens 12.

[0064] The compensation lens is located in the middle of the through hole and is fixed in the gap area by a snap ring or adhesive method. The two sides of the compensation lens are the convex lens 12 and the concave lens 13 described above. If there is still aberration (such as edge spot distortion) between the convex lens 12 and the concave lens 13, the compensation lens can further correct the light path and improve the uniformity and collimation of the parallel light beam.

[0065] In this embodiment, the compensation lens is a convex lens.

[0066] In another optional embodiment, three lenses, four lenses or more lens combinations are provided in the shaping lens group. It should be noted that after the combination of multiple lenses, the light beam passing through the shaping lens group can be a parallel light beam, for example, when three lenses are used, a combination of convex lens + convex lens + concave lens can be used, and in this case, the light beam passes through the convex lens, the convex lens and the concave lens in turn. A combination of convex lens + concave lens + convex lens can also be used, and in this case, the light beam passes through the convex lens, the concave lens and the convex lens in turn. When four lenses are combined, such as convex lens + convex lens + concave lens + convex lens combination, the number of lenses and lens combinations used is not limited, and the actual implementation is used as the standard.

[0067] It should be noted that the above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. An imaging color brightness meter for spectral correction formalized, characterized by, The utility model relates to a color brightness meter, including: Lens, color brightness meter body and shaping mirror group, the lens is connected on the color brightness meter body, and the lens is used for transmitting light beam into the color brightness meter body; The color brightness meter body is provided with a rotating disc and an internal spectrometer, the color brightness meter body is provided with an optical fiber, the optical fiber is connected with the internal spectrometer, the rotating disc is controlled to rotate to make the reflecting prism be located in the corresponding position of the lens, and the reflecting prism is used for reflecting the light beam; The shaping mirror group is arranged on the light path of the light beam, and the shaping mirror group is used for converging the light beam to form parallel light beam, and the parallel light beam is irradiated on the end face of the optical fiber.

2. The imaging color brightness meter according to claim 1, wherein, The rotating disc is provided with a fixed plate, the reflecting prism is fixed on the fixed plate, the shaping mirror group is fixedly connected on the fixed plate, and when the reflecting prism is located in the corresponding position of the lens, the shaping mirror group is located between the reflecting prism and the optical fiber.

3. The imaging color brightness meter of claim 1, wherein, The shaping mirror group is connected with the reflecting prism, and the shaping mirror group is located on the side of the reflecting prism facing the lens, so that the light beam reaches the reflecting prism after being shaped by the shaping mirror group.

4. The imaging color brightness meter of claim 1, wherein, The shaping mirror group is arranged in the lens.

5. The imaging color brightness meter according to any one of claims 1 to 4, characterized in that, The shaping mirror group includes convex lens and concave lens, the convex lens and the concave lens are parallel to each other, the convex lens is located in front of the concave lens, so that the light beam passes through the convex lens and the concave lens in turn.

6. The imaging color brightness meter of claim 5, wherein, The convex lens is single convex lens / double convex lens, and the concave lens is single concave lens / double concave lens.

7. The imaging color brightness meter of claim 5, wherein, The shaping mirror group further includes a fixing seat, the fixing seat is provided with a through hole, and the convex lens and the concave lens are fixed in the through hole.

8. The imaging color brightness meter of claim 7, wherein, A gap is arranged between the convex lens and the concave lens.

9. The imaging color brightness meter according to any one of claims 1 to 4, characterized in that, The rotating disc is provided with a shooting lens, the shooting lens is adjacent to the reflecting prism, the rotating disc is controlled to rotate to make the shooting lens coaxial with the lens, and the light beam reaches the light processing module in the color brightness meter after passing through the shooting lens.

10. The imaging color brightness meter according to any one of claims 1 to 4, characterized in that, The cross-sectional diameter of the parallel light beam is greater than or equal to the end face diameter of the optical fiber.

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