Spectrophotometer with high utilization rate

Abstract

The invention relates to the technical field of spectrophotometers, in particular to a high-utilization-rate spectrophotometer which comprises a color photometer whole body, the color photometer whole body comprises a measuring head body and a base, the measuring head body is fixedly arranged at the top of the base through an electric lifting rod, and a measuring opening is formed in the bottom of the measuring head body. According to the invention, the included angle between the light emitted from the collimating annular light guide device and the reflecting surface of the reflector is 45 degrees, and the included angle between the reflected light of the reflector and the measuring surface of the measuring port is 45 degrees, so that the light emitted by the annular light source is collimated through the collimating annular light guide device and is totally reflected through the inner surface of the collimating annular light guide device, and the light is guided to the reflector; and the light emitted by the annular light guide device is reflected to the surface of the sample at an angle of 45 degrees through the reflector, and the surface of the sample is uniformly illuminated, so that a 45 / 0 annular illumination effect is realized, the system efficiency is favorably improved, and the signal-to-noise ratio is conveniently improved.

Description

Technical Field

[0001] The present invention relates to the technical field of spectrophotometers, and in particular to a spectrophotometer with high utilization rate. Background Art

[0002] In reflectance spectrophotometers, the choice of test light source and illumination method are crucial to the accuracy of color measurement. According to relevant standards (such as GB / T12823.4-2008), a 45° / 0° (45 / 0) illumination and test structure can produce measurement results close to those perceived by the human eye.

[0003] In portable spectrophotometers, LEDs are commonly used as test light sources due to size limitations and the spectrophotometric equipment's need for strong test signals. However, high- and medium-power LEDs are typically non-directional light sources, making them difficult to utilize efficiently. Existing technologies often use direct occlusion to achieve 45-degree annular illumination.

[0004] However, in actual application, the direct occlusion method leads to efficiency loss, which is not conducive to the efficient operation of the spectrophotometric colorimetric system. In addition, it is difficult to strictly comply with the standard geometric conditions of 45 / 0 ring lighting, which affects the measurement accuracy. Therefore, a high-utilization spectrophotometer is proposed to solve the above problems. Summary of the Invention

[0005] To address the above-mentioned shortcomings of the prior art, the present invention provides a highly efficient spectrophotometer. This instrument effectively addresses the issues of direct occlusion in the prior art, which results in efficiency loss and is detrimental to the efficient operation of the spectrophotometric colorimetric system. Furthermore, the instrument also struggles to strictly comply with the standard geometric conditions of 45 / 0 annular illumination, thus affecting measurement accuracy.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides a high-utilization spectrophotometer, comprising:

[0008] The colorimeter as a whole includes a probe body and a base. The probe body is fixedly arranged on the top of the base by an electric lifting rod. A measuring port is provided at the bottom of the probe body. A probe inner cavity is provided inside the probe body. A light source is fixedly provided on the inner wall of the probe inner cavity. The light from the light source passes through a collimating annular light guide device, a reflector, and a measuring port in sequence. The light emitted from the collimating annular light guide device is at a 45° angle to the reflecting surface of the reflector, and the reflected light from the reflector is at a 45° angle to the measuring surface of the measuring port.

[0009] Preferably, a light-blocking structure is fixedly provided in the inner cavity of the probe, and the light-blocking structure cooperates with the inner wall of the inner cavity of the probe to form a light-emitting channel, and the reflected light of the reflector is transmitted to the measuring port through the light-emitting channel.

[0010] Preferably, a support platform for supporting the object to be detected is provided on the top of the base, a driving shaft is fixedly provided on the bottom of the support platform, and the bottom of the driving shaft passes through the upper surface of the base and extends into the inner cavity of the base.

[0011] Preferably, a connecting port is provided on the top of the driving shaft, a connecting pipe is rotatably connected to the outer wall of the driving shaft through a bearing, and the connecting pipe is communicated with the connecting port, and an air suction pump is fixedly installed on the other end of the connecting pipe.

[0012] Preferably, a suction port is provided on the top of the support platform, and a plurality of groups of suction ports are provided, and the plurality of groups of suction ports are connected to the communication port.

[0013] Preferably, a driving motor is fixedly arranged in the inner cavity of the base, and the top output end of the driving motor is fixedly connected to the bottom of the driving shaft.

[0014] Preferably, a rotating disk is fixedly provided on the outer wall of the driving shaft, and a disk groove is provided on the outer wall of the rotating disk, and multiple groups of disk grooves are provided. A positioning block is rotatably connected to the top of the base through a pin shaft, and one end of the positioning block is movably engaged in the corresponding disk groove.

[0015] Preferably, a rotating motor is fixedly provided in the inner cavity of the base, a rotating plate is fixedly provided on the outer wall of the output end of the rotating motor, a protrusion is fixedly provided on the outer wall of the rotating plate, and a push block is fixedly provided on the outer wall of the positioning block.

[0016] Preferably, a fixing block is fixedly provided on the top of the base, and a spring bar is movably sleeved on the outer wall of the fixing block, and the other end of the spring bar is fixedly provided on the outer wall of the positioning block.

[0017] Preferably, a protective cover is fixedly provided on the top of the base.

[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] 1. In the present invention, by setting the angle of the light emitted from the collimating annular light guide device to be 45 degrees with the reflecting surface of the reflector, and the angle of the reflected light from the reflector to the measuring surface of the measuring port to be 45 degrees, the light emitted from the annular light source is collimated by the collimating annular light guide device, and is totally reflected by its inner surface to guide the light to the reflector, and then the light emitted from the annular light guide device is reflected by the reflector at an angle of 45 degrees to the sample surface. The sample surface is evenly illuminated, achieving a 45 / 0 annular lighting effect, which is beneficial to improving system efficiency and facilitating improving the signal-to-noise ratio.

[0020] 2. In the present invention, a light-blocking structure is provided to cooperate with the inner wall of the probe cavity to form a light-emitting channel, and the reflected light of the reflector is transmitted to the measuring port through the light-emitting channel, so that the reflected light of the reflector is strictly limited to be transmitted within a predetermined optical path range, avoiding scattering and stray reflection of light in the probe cavity, ensuring that the light is efficiently and accurately transmitted to the measuring port, reducing the loss of light energy, allowing more reflected light to reach the measuring port, and improving the measurement efficiency and sensitivity of the system.

[0021] 3. In the present invention, by setting up the suction pump to start, the adsorption port generates negative pressure, and the object to be tested is firmly fixed on the support table to prevent it from displacement and shaking during the measurement process, ensuring the relative position between the object and the probe body during measurement. The contact consistency between the probe and the surface of the object is ensured during the measurement process, reducing the color difference measurement error caused by the movement or deformation of the object, and significantly improving the accuracy and repeatability of the measurement.

[0022] 4. In the present invention, a rotating motor is set to start and drive the rotating plate to rotate, so that the rotating plate drives the protrusion to squeeze and push the push block, so that the positioning block moves out of the disc slot, and the driving motor drives the driving shaft to rotate, and the rotating driving shaft drives the support platform to rotate, so that the rotating support platform drives the object to be inspected to rotate, so that the detection system can perform multi-angle measurement on the object, and then collect data of the object at different angles, ensuring the integrity and accuracy of the detection data, and the automatic rotation makes the detection process more efficient, reducing the time of manual adjustment of the object position. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a cross-sectional view of the local structure of the probe body of the present invention;

[0026] Figure 3 It is a cross-sectional view of the base structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the positioning block structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the drive shaft structure of the present invention.

[0029] Figure numerals: 1. Colorimeter as a whole; 2. Probe body; 201. Probe inner cavity; 202. Light source; 203. Measuring port; 204. Collimating annular light guide; 205. Reflector; 206. Light output channel; 207. Light blocking structure; 3. Base; 301. Protective cover; 4. Support platform; 401. Adsorption port; 5. Driving motor; 501. Driving shaft; 502. Connecting port; 503. Rotating disk; 504. Disk slot; 6. Rotating motor; 601. Rotating plate; 602. Bump; 603. Positioning block; 604. Push block; 605. Fixing block; 606. Spring bar; 7. Suction pump; 701. Connecting pipe. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] The present invention will be further described below with reference to the embodiments.

[0032] Refer to the attached Figure 1-5 , a high-utilization spectrophotometer, comprising:

[0033] The colorimeter as a whole 1 includes a probe body 2 and a base 3. The probe body 2 is fixedly arranged on the top of the base 3 by an electric lifting rod. A measuring port 203 is provided at the bottom of the probe body 2. A probe inner cavity 201 is provided inside the probe body 2. A light source 202 is fixedly provided on the inner wall of the probe inner cavity 201. The light source 202 is usually composed of a plurality of LED lamp beads arranged in a ring to provide uniform light covering a large area. The light from the light source 202 passes through a collimating annular light guide 204, a reflector 205, and a measuring port 203 in sequence. The collimating annular light guide 204 is a combination of a collimator and an annular light guide. The light is at a 45° angle to the reflecting surface of the reflector 205. The collimator is used to collimate the light emitted by the ring light source 202, making the light more parallel, reducing divergence, and improving the utilization rate of light and the lighting effect. The inner surface of the ring light guide is designed with a specific curvature or angle to achieve total reflection of the light, receive the collimated light, and perform total reflection through its inner surface to guide the light to the reflector 205. The reflected light of the reflector 205 is at a 45° angle to the measuring surface of the measuring port 203, and the light emitted by the collimated ring light guide device 204 is reflected at a 45-degree angle to the sample surface. The sample surface is evenly illuminated, achieving a 45 / 0 ring lighting effect.

[0034] A light-blocking structure 207 is fixedly provided in the probe inner cavity 201, and the light-blocking structure 207 cooperates with the inner wall of the probe inner cavity 201 to form a light-emitting channel 206. The reflected light of the reflector 205 is transmitted to the measuring port 203 through the light-emitting channel 206, which is used to strictly limit the reflected light of the reflector 205 to be transmitted within a predetermined optical path range, thereby avoiding scattering and stray reflection of light in the probe inner cavity 201, ensuring that the light is efficiently and accurately transmitted to the measuring port 203, reducing the loss of light energy, allowing more reflected light to reach the measuring port 203, and improving the measurement efficiency and sensitivity of the system.

[0035] A support platform 4 for supporting the item to be inspected is provided on the top of the base 3. A drive shaft 501 is fixedly provided at the bottom of the support platform 4, and the bottom of the drive shaft 501 passes through the upper surface of the base 3 and extends into the inner cavity of the base 3, for placing the item to be inspected on the support platform 4.

[0036] A connecting port 502 is provided at the top of the driving shaft 501, and a connecting pipe 701 is rotatably connected to the outer wall of the driving shaft 501 through a bearing, and the connecting pipe 701 is communicated with the connecting port 502, and an air suction pump 7 is fixedly installed at the other end of the connecting pipe 701. An adsorption port 401 is provided at the top of the support table 4, and there are multiple groups of adsorption ports 401, and multiple groups of adsorption ports 401 are communicated with the connecting port 502. When in use, by starting the air suction pump 7, the adsorption port 401 generates negative pressure to firmly fix the object to be detected on the support table 4 to prevent it from displacement or shaking during the measurement process. This is especially important for thin, easy-to-slide or uneven-surface objects, such as paper, film, and fabric. It ensures that the relative position between the object and the probe body 2 is stable during measurement, ensures the consistency of contact between the probe and the surface of the object during measurement, reduces the color difference measurement error caused by movement or deformation of the object, and significantly improves the accuracy and repeatability of the measurement.

[0037] A driving motor 5 is fixedly installed in the inner cavity of the base 3, and the top output end of the driving motor 5 is fixedly connected to the bottom of the driving shaft 501. By starting the driving motor 5, the driving shaft 501 is driven to rotate, and the rotating driving shaft 501 drives the support platform 4 to rotate, so that the rotating support platform 4 drives the object to be inspected to rotate, so that the detection system performs multi-angle measurement on the object, and then collects data of the object at different angles, ensuring the integrity and accuracy of the detection data. The automatic rotation makes the detection process more efficient and reduces the time of manual adjustment of the object position. It is especially suitable for batch detection or scenarios where multi-angle data needs to be obtained quickly.

[0038] A rotating disk 503 is fixedly provided on the outer wall of the driving shaft 501, and a disk groove 504 is provided on the outer wall of the rotating disk 503, and there are multiple groups of disk grooves 504. A positioning block 603 is rotatably connected to the top of the base 3 through a pin shaft, and one end of the positioning block 603 is movably engaged in the corresponding disk groove 504. During use, when the positioning block 603 is engaged in the corresponding disk groove 504, the rotating disk 503 is limited, and then the position angle of the support platform 4 and the object adsorbed on the support platform 4 is limited, so that the object can be stably detected.

[0039] A rotating motor 6 is fixedly provided in the inner cavity of the base 3, and a rotating plate 601 is fixedly provided on the outer wall of the output end of the rotating motor 6, a protrusion 602 is fixedly provided on the outer wall of the rotating plate 601, and a push block 604 is fixedly provided on the outer wall of the positioning block 603. When in use, the rotating plate 601 is driven to rotate by starting the rotating motor 6, so that the rotating rotating plate 601 drives the protrusion 602 to rotate. When the protrusion 602 rotates to the push block 604, the protrusion 602 squeezes and pushes the push block 604, so that the moving push block 604 pushes the positioning block 603 to move, so that the positioning block 603 moves out of the disk slot 504, so that the output end of the drive motor 5 drives the drive shaft 501 to rotate, so that the position of the support platform 4 is adjusted.

[0040] A fixed block 605 is fixedly provided on the top of the base 3, and a spring bar 606 is movably sleeved on the outer wall of the fixed block 605, and the other end of the spring bar 606 is fixedly provided on the outer wall of the positioning block 603. When the protrusion 602 is removed from the push block 604, the positioning block 603 is pulled by the restoring force of the spring bar 606, so that one end of the positioning block 603 continues to be stuck in the corresponding disk slot 504, thereby limiting the position of the rotating disk 503.

[0041] A protective cover 301 is fixedly provided on the top of the base 3 , and the protective cover 301 is sleeved over the rotating disk 503 , the rotating plate 601 , and the positioning block 603 to protect their structural components.

[0042] Working principle:

[0043] When in use, the light from the light source 202 passes through the collimating annular light guide 204, which collimates the light emitted by the annular light source 202, making the light more parallel, reducing divergence, and improving the utilization rate of light and the lighting effect. The inner surface of the annular light guide is designed with a specific curvature or angle to achieve total reflection of the light. The collimated light is received and totally reflected through its inner surface, guiding the light at a 45-degree angle to the reflector 205. The reflector 205 reflects the light emitted by the annular light guide 204 at a 45-degree angle to the sample surface. The sample surface is evenly illuminated, achieving a 45 / 0 annular lighting effect, which is beneficial to improving system efficiency and facilitating an improvement in signal-to-noise ratio. The reflected light of the reflector 205 is transmitted to the measuring port 203 through the light output channel 206, which is used to strictly limit the reflected light of the reflector 205 to be transmitted within a predetermined optical path range, thereby avoiding scattering and stray reflection of the light in the probe inner cavity 201, ensuring that the light is efficiently and accurately transmitted to the measuring port 203, reducing the loss of light energy, allowing more reflected light to reach the measuring port 203, and improving the measurement efficiency and sensitivity of the system.

[0044] During use, the object to be tested is placed on the support platform 4, and the suction pump 7 is started to generate negative pressure through the adsorption port 401, so that the object to be tested is firmly fixed on the support platform 4 to prevent it from displacement and shaking during the measurement process. The lifting rod drives the probe body 2 to move downward so that the measuring port 203 is attached to the object to be tested and the object to be tested is measured. When the object is measured at this position, the probe body 2 moves up and away from the object. At this time, the rotating motor 6 is started to drive the rotating plate 601 to rotate, so that the rotating plate 601 drives the protrusion 602 to squeeze and push the push block 604, so that the positioning block 603 moves, so that the positioning block 603 moves out of the disc slot 504, and the driving motor 5 drives the driving shaft 501 to rotate, and the rotating driving shaft 501 drives the support platform 4 to rotate, so that the rotating support platform 4 drives the object to be tested to rotate, so that the detection system performs multi-angle measurement on the object, and then collects data of the object at different angles, ensuring the integrity and accuracy of the detection data. The automatic rotation makes the detection process more efficient and reduces the time of manual adjustment of the object position.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A high-utilization spectrophotometer, comprising a colorimeter as a whole (1), wherein the colorimeter as a whole (1) comprises a probe body (2) and a base (3), wherein the probe body (2) is fixedly arranged on the top of the base (3) by an electric lifting rod, and a measuring port (203) is provided at the bottom of the probe body (2), characterized in that: A probe inner cavity (201) is provided inside the probe body (2), and a light source (202) is fixedly provided on the inner wall of the probe inner cavity (201). Light from the light source (202) passes through a collimating annular light guide (204), a reflector (205), and a measuring port (203) in sequence. The light emitted from the collimating annular light guide (204) forms an angle of 45° with the reflecting surface of the reflector (205), and the reflected light from the reflector (205) forms an angle of 45° with the measuring surface of the measuring port (203).

2. The high-utilization spectrophotometer according to claim 1, characterized in that: The probe inner cavity (201) is fixedly provided with a light-blocking structure (207), and the light-blocking structure (207) cooperates with the inner wall of the probe inner cavity (201) to form a light-emitting channel (206), and the reflected light of the reflector (205) is transmitted to the measuring port (203) through the light-emitting channel (206).

3. The high-utilization spectrophotometer according to claim 1, characterized in that: A support platform (4) for supporting an object to be detected is provided on the top of the base (3), a driving shaft (501) is fixedly provided on the bottom of the support platform (4), and the bottom of the driving shaft (501) passes through the upper surface of the base (3) and extends toward the inner cavity of the base (3).

4. The high-utilization spectrophotometer according to claim 3, characterized in that: A connecting port (502) is provided at the top of the driving shaft (501), and a connecting pipe (701) is rotatably connected to the outer wall of the driving shaft (501) via a bearing, and the connecting pipe (701) is connected to the connecting port (502), and an air suction pump (7) is fixedly installed at the other end of the connecting pipe (701).

5. The high-utilization spectrophotometer according to claim 4, characterized in that: The top of the support platform (4) is provided with a suction port (401), and the suction port (401) is provided in multiple groups, and the multiple groups of the suction ports (401) are connected to the communication port (502).

6. The high-utilization spectrophotometer according to claim 1, characterized in that: A driving motor (5) is fixedly arranged in the inner cavity of the base (3), and the top output end of the driving motor (5) is fixedly connected to the bottom of the driving shaft (501).

7. The high-utilization spectrophotometer according to claim 6, characterized in that: A rotating disk (503) is fixedly provided on the outer wall of the driving shaft (501), and a disk groove (504) is provided on the outer wall of the rotating disk (503), and the disk groove (504) is provided in multiple groups. A positioning block (603) is rotatably connected to the top of the base (3) through a pin shaft, and one end of the positioning block (603) is movably engaged in the corresponding disk groove (504).

8. The high-utilization spectrophotometer according to claim 7, characterized in that: A rotating motor (6) is fixedly provided in the inner cavity of the base (3), a rotating plate (601) is fixedly provided on the outer wall of the output end of the rotating motor (6), a convex block (602) is fixedly provided on the outer wall of the rotating plate (601), and a pushing block (604) is fixedly provided on the outer wall of the positioning block (603).

9. The high-utilization spectrophotometer according to claim 8, characterized in that: A fixing block (605) is fixedly provided on the top of the base (3), and a spring bar (606) is movably sleeved on the outer wall of the fixing block (605), and the other end of the spring bar (606) is fixedly provided on the outer wall of the positioning block (603).

10. The high-utilization spectrophotometer according to claim 1, characterized in that: A protective cover (301) is fixedly provided on the top of the base (3).

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