Optical lens and color analyzer

Abstract

The invention discloses an optical lens and a color analyzer, which are used for shortening the length of the optical lens and reducing the weight of the color analyzer. The optical lens is applied to the color analyzer, the color analyzer comprises a shell and a conduction optical fiber in the shell, the optical lens is connected with the shell and penetrates through the shell to form light path connection with the conduction optical fiber, and the optical lens comprises a lens body, a lens assembly and a diaphragm assembly; the lens main body is provided with an incident end and an emergent end, the incident end is communicated with the emergent end through a light beam channel, and the light beam channel is a channel when light on a screen to be detected is transmitted from the incident end to the emergent end; the lens assembly is arranged in the light beam channel, and the lens assembly is used for converging the light rays to form emergent light beams with uniform intensity; the diaphragm assembly is arranged in the light beam channel, the emergent light beam irradiates the front end face of the conduction optical fiber after passing through the diaphragm assembly, the plane where the emergent light beam focuses is a rear focal plane, and the front end face of the conduction optical fiber is located in front of the rear focal plane.

Description

Technical Field

[0001] The present application relates to the technical field of screen detection equipment, and in particular to an optical lens and a color analyzer. Background Art

[0002] As a precision optical measurement device, color analyzer is widely used in the test of display screen brightness and color characteristics. It can accurately capture and analyze the light emitted by the display screen, so as to evaluate the key parameters of the display screen such as brightness and chromaticity. The color analyzer gathers the light at the position of the display screen to be tested through an optical lens at the front end, and transmits it to the transmission fiber, CIE tricolor filter and processing module at the back for testing.

[0003] To ensure effective convergence and conduction of light, existing color analyzers place the fiber beam combining port at the rear focal plane of the optical lens to meet the requirement of precise alignment between the rear focal plane and the fiber beam combining port. However, this results in a longer optical lens, which makes the overall length and weight of the color analyzer relatively large, which is not conducive to rapid deployment and flexible adjustment of the test position, and has the problem of low portability. In addition, the increase in the weight of the color analyzer also affects the stability of the test, increases the difficulty of operation and the risk of error.

[0004] Based on this, the present application proposes an optical lens and a color analyzer to solve the above technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides an optical lens and a color analyzer, which can shorten the length of the optical lens and reduce the weight of the color analyzer.

[0006] In a first aspect, the present application provides an optical lens, which is applied to a color analyzer. The color analyzer includes a housing and a transmission optical fiber located inside the housing. The optical lens is connected to the housing and penetrates the housing to form an optical path transmission with the transmission optical fiber. The end face of the transmission optical fiber connected to the optical path of the optical lens is a front face, including: Lens body, lens assembly and aperture assembly; The lens body is provided with an incident end and an exit end, the incident end and the exit end are connected through a beam channel, and the beam channel is a channel for the light on the screen to be measured to be transmitted from the incident end to the exit end; the lens assembly is arranged in the beam channel, and the lens assembly is used to converge the light to form an exit beam with uniform intensity; The aperture assembly is arranged in the light beam channel. The outgoing light beam is irradiated on the front end face of the transmission optical fiber after passing through the aperture assembly. The plane on which the outgoing light beam is focused is the rear focal plane. The front end face of the transmission optical fiber is located in front of the rear focal plane of the outgoing light beam. The outgoing light beam forms a converging spot on the front end face of the transmission optical fiber.

[0007] Optionally, the lens assembly includes a first lens, a second lens, a third lens and a fourth lens sequentially arranged along the light transmission direction; Wherein, the curvature radius of the first lens is 40 mm; The curvature radius of the second lens is 40 mm; The curvature radius of the third lens is 25 mm; The curvature radius of the fourth lens is 20 mm.

[0008] Optionally, the first lens and the second lens, the second lens and the third lens, and the third lens and the fourth lens are connected by gluing.

[0009] Optionally, the aperture assembly includes a first adjustment sleeve, an adjustable aperture and an adjustment rod, the adjustable aperture is connected inside the lens body, the first adjustment sleeve is disposed outside the lens body, one end of the adjustment rod is connected to the adjustment plate of the adjustable aperture, and the other end passes through the lens body and is connected to the first adjustment sleeve, and the first adjustment sleeve is controlled to rotate to adjust the aperture size of the adjustable aperture through the adjustment plate.

[0010] Optionally, the aperture assembly also includes a second adjustment sleeve and a slider, the second adjustment sleeve is disposed outside the lens body, one end of the slider is connected to the adjustable aperture, and the other end passes through the lens body and is connected to the second adjustment sleeve, and the second adjustment sleeve is used to adjust the adjustable aperture to move in a direction perpendicular to the rear focal plane.

[0011] Optionally, a through opening is provided on the lens body in a direction perpendicular to the rear focal plane, a plurality of slots are provided on the side of the slider facing the second adjustment sleeve, a thread is provided on the inner wall of the second adjustment sleeve, and a plurality of the slots pass through the opening and engage with the thread.

[0012] Optionally, the rear focal plane is located between the terminal end face of the emission end and the aperture assembly, the front end face of the transmission optical fiber passes through the shell and extends into the emission end, and the front end face of the transmission optical fiber is located between the rear focal plane and the aperture assembly.

[0013] Optionally, a threaded portion is provided on the emission end, and the emission end is connected to the housing via the threaded portion, and the controlled rotation of the threaded portion is used to control the distance between the aperture assembly and the transmission optical fiber.

[0014] Optionally, a soft protective layer is provided on the incident end, and the soft protective layer is used to abut against the screen to be tested.

[0015] The second aspect of the present application provides a color analyzer, comprising a housing, a transmission optical fiber, a three-color filter, a processing module, and the optical lens of the first aspect and any one of the first aspects, wherein the transmission optical fiber, the three-color filter, and the processing module are all arranged in the housing, the optical lens is connected to the housing, the optical lens penetrates the housing and forms an optical path connection with the transmission optical fiber, the optical lens is used to converge the light on the screen to be measured to form an outgoing light beam with uniform intensity, the outgoing light beam converges at the end face of the transmission optical fiber, the end face of one end of the transmission optical fiber close to the optical lens is located in front of the rear focal plane, the front is the front of the outgoing light beam entering, and the transmission optical fiber is used to guide the outgoing light beam to the three-color filter, so that the outgoing light beam reaches the processing module after passing through the three-color filter.

[0016] It can be seen from the above technical solutions that this application has the following effects: The incident end and the exit end of the lens body are connected by setting a beam channel, and the beam channel is the channel through which the light on the screen to be measured is transmitted from the incident end to the exit end. The lens assembly is set in the beam channel, and the lens assembly is used to converge the light to form an exit light beam with uniform intensity. The aperture assembly is set in the beam channel, and the aperture assembly is located between the lens assembly and the rear focal plane of the exit light beam. The lens body is connected to the housing of the color analyzer through the exit end, and forms an optical path connection with the transmission optical fiber inside it. The converged uniform light spot is irradiated on the transmission optical fiber, and the end face of the transmission optical fiber close to the optical lens is located between the rear focal plane and the aperture assembly. Therefore, compared with the prior art, the present application sets the position of the aperture before the rear focal plane, and also sets the end face of the transmission optical fiber close to the aperture assembly before the rear focal plane, thereby shortening the length of the lens body, thereby reducing the weight of the color analyzer, and improving the portability of the color analyzer. In addition, the light on the screen to be measured is converged into an outgoing light beam with uniform intensity through the lens assembly, which improves the uniformity of the outgoing light beam and thus improves the accuracy of the color analyzer measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution in the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of an optical lens provided in the present application; Figure 2 for Figure 1 A local enlarged schematic diagram of the position corresponding to the middle label A; Figure 3 A schematic diagram of an adjustable diaphragm in an optical lens provided in the present application; Figure 4 A schematic diagram of a first adjustment sleeve and a baffle in an optical lens provided in the present application; Figure 5 A schematic diagram of a transmission optical fiber extending into an output end of an optical lens provided by the present application; Figure 6 A schematic diagram of a color analyzer provided in the present application; Figure 7 A schematic diagram of forming an outgoing light beam of the present application; Lens body 01, lens assembly 02, aperture assembly 03, rear focal plane 04, transmission optical fiber 05, first lens 06, second lens 07, third lens 08, fourth lens 09, first adjustment sleeve 10, adjustable aperture 11, adjustment rod 12, second adjustment sleeve 13, slider 14, baffle 15, threaded portion 16, housing 17, three-color filter 18, soft protective layer 19, processing module 20. DETAILED DESCRIPTION

[0019] In the present invention, the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside”, “outside”, “middle”, “vertical”, “horizontal”, “lateral” and “longitudinal” are based on the directions or positional relationships shown in the accompanying drawings, and are only used to illustrate the relative positional relationships between the various components or components, and do not particularly limit the specific installation directions of the various components or components.

[0020] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0021] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] In addition, the structures, proportions, sizes, etc. drawn in the drawings in the present application are only used to match the contents disclosed in the specification for the technical personnel in this field to understand and read, and are not used to limit the restrictive conditions under which the present application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present application without affecting the effects and purposes that can be achieved by the present application.

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] The present application provides an optical lens and a color analyzer, which are used to shorten the length of the optical lens and reduce the weight of the color analyzer. The specific implementation process of the present application is described as follows.

[0025] See also Figures 1 to 7 The first aspect of the present application provides an optical lens, which is used in a color analyzer. The color analyzer includes a housing 17 and a transmission optical fiber 05 located inside the housing 17. The optical lens is connected to the housing 17 and penetrates the housing 17 to form an optical path connection with the transmission optical fiber 05. The end face where the transmission optical fiber 05 is connected to the optical path of the optical lens is the front end face. The optical lens includes: A lens body 01, a lens assembly 02 and an aperture assembly 03; the lens body 01 is provided with an incident end and an exit end, the incident end and the exit end are connected through a beam channel, and the beam channel is a channel for the light on the screen to be measured to be transmitted from the incident end to the exit end; the lens assembly 02 is arranged in the beam channel, and the lens assembly 02 is used to converge the light to form an exit light beam with uniform intensity; the aperture assembly 03 is arranged in the beam channel, and the exit light beam is irradiated on the front end face of the transmission optical fiber 05 after passing through the aperture assembly 03, and the plane on which the exit light beam is focused is the rear focal plane 04, and the front end face of the transmission optical fiber 05 is located in front of the rear focal plane of the exit light beam, and the exit light beam forms a converging light spot on the front end face of the transmission optical fiber.

[0026] The two ends of the lens body 01 are respectively the incident end and the output end, which are connected by a light beam channel. The incident end is used to abut against the screen to be tested, and the output end is used to connect with the transmission optical fiber 05 on the color analyzer, so that the light of the screen to be tested reaches the transmission optical fiber 05 after passing through the incident end, the light beam channel and the output end.

[0027] A lens assembly 02 is provided in the beam channel, and the lens assembly 02 is close to the incident end. The lens assembly 02 is perpendicular to the principal optical axis of the incident light of the screen to be measured, so as to perform preliminary processing and focusing on the light entering the beam channel, that is, the lens assembly 02 is responsible for converging the light of the screen to be measured to form an outgoing light beam with uniform intensity. The outgoing light beam is located in the beam channel and between the lens assembly 02 and the transmission optical fiber 05. The outgoing light beam is in a converging state in the beam channel. The plane on which the outgoing light beam is focused is the rear focal plane 04, and the rear focal plane 04 is perpendicular to the principal optical axis of the outgoing light beam. The outgoing light beam is irradiated on the front end face of the transmission optical fiber 05, and a uniform converging light spot is formed on the front end face. The converging light spot helps the light to enter the transmission optical fiber 05 more efficiently, reduces the loss and scattering of light, and thus improves the measurement accuracy of the color analyzer.

[0028] The aperture assembly 03 is arranged in the beam channel, and the aperture assembly 03 is arranged between the lens assembly 02 and the rear focal plane 04 of the outgoing light beam. The aperture assembly 03 is used to limit the aperture of the outgoing light beam to control the direction and range of the outgoing light beam, thereby optimizing the imaging quality. The aperture of the aperture in the aperture assembly 03 can be fixed or adjustable, and the aperture selected in the aperture assembly 03 can be an aperture aperture or a field aperture.

[0029] The transmission optical fiber 05 is located inside the shell 17, and the lens body 01 is connected to the shell 17, and the connection can be a snap connection or a threaded connection; the shell 17 is provided with a through connection port at the connection with the lens body 01, and an optical path connection is formed between the lens body 01 and the transmission optical fiber 05, that is, the light beam can be transmitted between the lens body 01 and the transmission optical fiber 05, so that the outgoing light beam formed by the lens assembly 02 arrives at the end face of the transmission optical fiber 05, which is the end face (front end face) of the transmission optical fiber 05 close to the lens body 01, and the front end face is located between the aperture assembly 03 and the rear focal plane 04, and the aperture size of the aperture in the aperture assembly 03 matches the cross-sectional size of the end of the transmission optical fiber 05, so as to ensure that the outgoing light beam covers the end of the transmission optical fiber 05.

[0030] It should be noted that the end face of the transmission optical fiber 05 does not overlap with the rear focal plane 04 .

[0031] In this embodiment, a lens assembly 02 is firstly arranged in the light beam channel of the lens body 01. After the light on the screen to be measured passes through the lens assembly 02 in the light beam channel, an outgoing light beam with uniform intensity is formed. The end faces of the aperture assembly 03 and the end of the transmission optical fiber 05 are both arranged in front of the rear focal plane 04 of the outgoing light beam. Compared with the prior art in which the transmission optical fiber is arranged on the rear focal plane 04, the present application moves the ends of the aperture assembly 03 and the transmission optical fiber 05 forward toward the lens assembly 02, which can shorten the length of the lens body 01, reduce the total mass of the lens, and further reduce the total mass of the color analyzer, thereby improving portability.

[0032] In addition, an outgoing light beam with uniform intensity means that the light intensity on the outgoing light beam remains consistent in all directions without significant differences in intensity. The realization of an outgoing light beam with uniform intensity improves the uniformity of the outgoing light beam entering the port of the transmission optical fiber 05, thereby improving the measurement accuracy of the color analyzer. By irradiating an outgoing light beam with uniform intensity onto the end of the transmission optical fiber 05, the outgoing light beam is transmitted to the color analyzer through the transmission optical fiber 05, so that the color analyzer can accurately capture the color information in all directions and avoid color distortion or deviation caused by uneven light intensity. The outgoing light beam with uniform intensity formed by convergence is as follows: Figure 7 shown.

[0033] In an optional embodiment, the lens assembly 02 includes a first lens 06, a second lens 07, a third lens 08 and a fourth lens 09 which are sequentially arranged along the light transmission direction; wherein, The curvature radius of the first lens 06 is 40 mm; The curvature radius of the second lens 07 is 40 mm; The curvature radius of the third lens 08 is 25 mm; The curvature radius of the fourth lens 09 is 20 mm.

[0034] In a specific implementation, other parameters of the lens assembly 02 are: the thickness of the first lens 06 is 7 mm, and the refractive index is 1.5168; the thickness of the second lens 07 is 2.5 mm, and the refractive index is 1.7231; the thickness of the third lens 08 is 1.2 mm, and the refractive index is 1.53; the thickness of the fourth lens 09 is 5 mm, and the refractive index is 1.712.

[0035] In this embodiment, each lens in the lens assembly 02 is set with special parameters to achieve accurate convergence and correction of light. The coordinated work between the lenses can reduce the generation of aberrations and distortions and improve the imaging quality and stability of the lens.

[0036] The first lens 06 is used to receive the light from the screen to be tested, and to preliminarily refract and focus the light. The first lens 06 uses a larger curvature radius (40mm) and a moderate refractive index (1.5168) to help maintain the stability and directionality of the light and reduce the scattering and loss of the light when it enters the lens assembly 02. At the same time, the first lens 06 is set to a thicker thickness (7mm) to provide sufficient refraction effect, so that the light can be preliminarily converged, which is convenient for further correction and convergence of the subsequent three lenses.

[0037] The second lens 07 is located behind the first lens 06 along the light transmission direction. The second lens 07 is used to further adjust the direction of the light and achieve the initial convergence of the light together with the first lens 06. The curvature radius of the second lens 07 is the same as that of the first lens 06 (40mm), which can maintain the stability and directionality of the light; the second lens 07 uses a higher refractive index (1.7231) and a thinner thickness (2.5mm) so that the light can be refracted more accurately when passing through the second lens 07, further reducing scattering and absorption, and improving the light transmission performance of the optical lens.

[0038] The third lens 08 is set with a smaller curvature radius (25mm) and a moderate refractive index (1.53) so that the light will be refracted more violently when passing through the third lens 08, thereby further converging the light. At the same time, the thinner thickness (1.2mm) can reduce the loss of light and has the effect of precise refraction and convergence.

[0039] The fourth lens 09 is used to adjust the direction of the light, ensuring that the light can be accurately focused on the rear focal plane 04 to form an outgoing light beam with uniform intensity. The fourth lens 09 is set with a minimum curvature radius (20mm) and a high refractive index (1.712) so that the light can undergo final accurate refraction when passing through the fourth lens 09, further reducing the generation of aberrations and distortions. The appropriate thickness (5mm) ensures that the fourth lens 09 has sufficient refractive power to form a high-quality outgoing light beam.

[0040] In this optional embodiment, the first lens 06 and the second lens 07 , the second lens 07 and the third lens 08 , and the third lens 08 and the fourth lens 09 are connected by gluing.

[0041] The material used for gluing can be optical shadowless glue, also known as optical UV glue, which has excellent transparency and refractive index consistency, and can ensure that the light will not be greatly affected during the transmission between lenses; it can also be optical epoxy resin, which also has the advantages of high strength, high transparency and good weather resistance.

[0042] In this embodiment, adjacent lenses are glued together to form a more compact and stable lens assembly 02, which can ensure the precise alignment between adjacent lenses and reduce the refraction and scattering of light caused by air gaps, thereby improving the overall performance of the optical lens of the present application. Secondly, it can reduce the loss of light between lenses and maintain the stability and consistency of light. In addition, it helps to improve the vibration and impact resistance of the optical lens of the present application.

[0043] In an optional embodiment, the aperture assembly 03 includes a first adjustment sleeve 10, an adjustable aperture 11 and an adjustment rod 12. The adjustable aperture 11 is connected to the lens body 01, and the first adjustment sleeve 10 is mounted outside the lens body 01. One end of the adjustment rod 12 is connected to the adjustment plate of the adjustable aperture 11, and the other end passes through the lens body 01 and is connected to the first adjustment sleeve 10. The first adjustment sleeve 10 is controlled to rotate to adjust the aperture size of the adjustable aperture 11 through the adjustment plate.

[0044] In order to adapt to the transmission optical fiber 05 of different cross-sectional sizes, the aperture assembly 03 is required to adjust the aperture size. Therefore, in the present embodiment, the aperture assembly 03 is composed of a first adjustment sleeve 10, an adjustable aperture 11 and an adjustment rod 12. The adjustable aperture 11 is fixed in the light beam channel of the lens body 01. A through hole is provided on the lens body 01. The adjustment sleeve is provided outside the through hole. The adjustment rod 12 passes through the through hole and is connected with the adjustment plate on the adjustable aperture 11. When the first adjustment sleeve 10 rotates, the adjustment plate on the adjustable aperture 11 can be driven to rotate through the adjustment rod 12. When the adjustment plate rotates, the aperture size of the adjustable aperture 11 can be adjusted, and the size of the outgoing light beam passing through the adjustable aperture 11 can be adjusted, so that the cross-sectional size of the outgoing light beam after passing through the adjustable aperture 11 matches the cross-sectional size of the transmission optical fiber 05.

[0045] Please continue reading Figure 1 and Figure 2 , Figure 2 It is a schematic diagram of the cooperation between the second adjustment sleeve 13 and the slider 14. In this optional embodiment, the aperture assembly 03 also includes a second adjustment sleeve 13 and a slider 14. The second adjustment sleeve 13 is mounted outside the lens body 01. One end of the slider 14 is connected to the adjustable aperture 11, and the other end passes through the lens body 01 and is connected to the adjustment sleeve. The adjustment sleeve is used to adjust the adjustable aperture 11 to move in a direction perpendicular to the rear focal plane 04.

[0046] In actual use, at the position of the adjustable aperture 11, if the maximum clear aperture of the adjustable aperture 11 is larger than the cross-sectional size of the outgoing light beam at this position, increasing the clear aperture of the adjustable aperture 11 cannot increase the cross-sectional size of the outgoing light beam. For example, at the position of the adjustable aperture 11, the maximum cross-sectional size of the outgoing light beam is 5 cm in diameter, and at this position, the maximum clear aperture of the adjustable aperture 11 is 7 cm in diameter. Therefore, when a transmission optical fiber 05 with a cross-sectional diameter of 6 cm appears, continuing to increase the clear aperture cannot increase the cross-sectional size of the outgoing light beam.

[0047] Based on this, the aperture assembly 03 of this embodiment also includes a second adjustment sleeve 13 and a slider 14. The second adjustment sleeve 13 is also mounted outside the lens body 01. The second adjustment sleeve 13 has the same outer diameter as the first adjustment sleeve 10. The second adjustment sleeve 13 is connected to the adjustable aperture 11 through the slider 14. When the second adjustment sleeve 13 rotates, it is used to adjust the distance between the slider 14 on the lens body 01 and the lens assembly 02, thereby adjusting the movement of the adjustable aperture 11 in the light beam channel.

[0048] The adjustable iris 11 is connected to the first adjustment sleeve 10 and the adjustment rod 12. Therefore, when the adjustable iris 11 moves laterally (the moving path is parallel to the light transmission path), the first adjustment sleeve 10 and the adjustment rod 12 also move accordingly. At this time, the length of the set perforation is the same as the length of the path of the lateral movement of the adjustable iris 11. In order to prevent external dust from entering the interior of the lens body 01 through the perforation, a baffle 15 is provided inside the lens body 01. The baffle 15 is connected to the first adjustment sleeve 10. When the first adjustment sleeve 10 rotates, the baffle 15 can block the perforation. At the same time, when the adjustable iris 11 and the first adjustment sleeve 10 move laterally, the baffle 15 also blocks the perforation, thereby achieving the effect of preventing dust from entering the interior of the lens body 01.

[0049] In this optional embodiment, a through opening is provided on the lens body 01 in a direction perpendicular to the rear focal plane 04, and the opening is located on the side of the lens body 01. A plurality of slots are provided on the side of the slider 14 facing the second adjustment sleeve 13, and a thread is provided on the inner wall of the second adjustment sleeve 13, and a plurality of slots pass through the opening and engage with the thread.

[0050] In realizing the lateral movement of the adjustable diaphragm 11 , one end of the slider 14 is fixedly connected to the adjustable diaphragm 11 . When the second adjustment sleeve 13 rotates, the slider 14 moves lateral as a whole through the cooperation of the thread and a plurality of slots, thereby realizing the position adjustment of the adjustable diaphragm 11 .

[0051] In an optional embodiment, an annular groove is provided in the beam channel, and the annular groove is used to clamp the lens assembly 02. In the method of fixing the lens assembly 02, the annular groove is specifically provided in the beam channel, and the annular groove is integrally formed with the lens body 01 and is a part of the lens body 01. The outer edge of the lens assembly 02 is clamped into the annular groove, and the lens assembly 02 can be fixed, thereby avoiding the situation where the lens assembly is offset.

[0052] The above describes the case where the transmission optical fiber 05 is completely inside the housing 17. In this case, the back focal plane 04 to be formed by the outgoing light beam is located inside the housing 17 and behind the end face of the transmission optical fiber 05. In another optional embodiment, the back focal plane 04 is located between the terminal end face of the outgoing end and the aperture assembly 03 (the portion of the lens body 01 located behind the aperture assembly 03 is called the outgoing end), and at this time, the front end face of the transmission optical fiber 05 extends into the outgoing end, and the front end face of the transmission optical fiber 05 is in front of the back focal plane 04, the front end face of the transmission optical fiber 05 is located between the back focal plane 04 and the aperture assembly 03, and the front end face does not overlap with the back focal plane 04.

[0053] Please continue reading Figure 6 In an optional embodiment, a threaded portion 16 is provided on the emission end, and the threaded portion 16 is connected to the housing 17. The emission end is controlled to rotate through the threaded portion 16 to control the distance between the aperture assembly 03 and the transmission optical fiber 05. In this embodiment, the lens body 01 is screwed to the housing 17 through the threaded portion 16 on the emission end, and the threaded portion 16 is provided with an external thread. The connection port on the housing 17 is provided with an internal thread, and the internal thread matches the external thread. In actual use, for color analyzers of different specifications, the position of the end of the transmission optical fiber 05 is inconsistent (the distance from the connection port is different). Therefore, in order to ensure that the rear focal plane is always behind the end of the transmission optical fiber 05 (along the transmission direction of the emission light beam, the incoming direction is the front, and the outgoing direction is the rear), the threaded portion 16 is provided, and the rear focal plane 04 is controlled to move in the direction of light beam transmission by controlling the screwing depth of the threaded portion 16 in the housing 17.

[0054] In an optional embodiment, a soft protective layer 19 is provided on the incident end, and the soft protective layer 19 is used to abut against the screen to be tested. The soft protective layer 19 is used to protect the screen to be tested and reduce the wear of the screen to be tested. The soft protective layer 19 can be made of materials such as rubber and silicone.

[0055] In addition, to protect the lens assembly 02, a protective lens can be provided between the soft protective layer 19 and the lens assembly 02. The protective lens is fully transparent (does not block light). By providing the protective lens, dust, moisture and other substances are prevented from entering the light beam channel, which can protect the lens assembly 02 and reduce the impact on the measurement results.

[0056] Please continue reading Figure 5-Figure 6 In a second aspect, the present application provides a color analyzer, comprising a housing 17, a transmission optical fiber 05, a three-color filter 18, a processing module 20 and an optical lens in any of the above embodiments, wherein the transmission optical fiber 05, the three-color filter 18 and the processing module 20 are all arranged in the housing 17, the optical lens is connected to the housing 17, the optical lens penetrates the housing 17 and forms an optical path connection with the transmission optical fiber 05, the optical lens is used to converge the light on the screen to be measured to form an outgoing light beam with uniform intensity, the outgoing light beam converges at the end face of the transmission optical fiber 05, the end face of one end of the transmission optical fiber 05 close to the optical lens is located in front of the rear focal plane 04, the front represents the front of the outgoing light beam entering, the transmission optical fiber 05 is used to guide the outgoing light beam to the three-color filter 18, so that the outgoing light beam reaches the processing module 20 after passing through the three-color filter 18.

[0057] The light beams entering through the transmission optical fiber 05 pass through the three-color filter 18 and arrive at the processing module 20, which detects and analyzes the light beams.

[0058] The optical lens used in the color analyzer of the present application has the aperture assembly 03 and the end of the transmission optical fiber 05 arranged before the rear focal plane 04, thereby shortening the length of the optical lens, thereby reducing the weight of the optical lens, and further reducing the weight of the color analyzer, thereby improving portability; In addition, since the optical lens adopts a lens assembly 02 formed by a combination of four lenses with specific parameters, the lens assembly 02 can converge the light on the screen to be tested to form an outgoing light beam. The light intensity of the outgoing light beam remains consistent in all directions without significant difference in intensity. Therefore, the outgoing light beam forms a uniform converging light spot on the end face of the transmission optical fiber, thereby improving the uniformity of the outgoing light beam entering the port of the transmission optical fiber 05, thereby improving the accuracy of the color analyzer.

[0059] It should be noted that the above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, 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 will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An optical lens, applied in a color analyzer, the color analyzer comprising a housing and a transmission optical fiber located inside the housing, the optical lens being connected to the housing and penetrating the housing to form an optical path connection with the transmission optical fiber, the end face of the transmission optical fiber connected to the optical path of the optical lens being a front end face, characterized in that: The optical lens comprises: a lens body, a lens assembly and an aperture assembly; The lens body is provided with an incident end and an exit end, the incident end and the exit end are connected through a beam channel, and the beam channel is a channel for the light on the screen to be measured to be transmitted from the incident end to the exit end; the lens assembly is arranged in the beam channel, and the lens assembly is used to converge the light to form an exit beam with uniform intensity; The aperture assembly is arranged in the light beam channel. The outgoing light beam is irradiated on the front end face of the transmission optical fiber after passing through the aperture assembly. The plane on which the outgoing light beam is focused is the rear focal plane. The front end face of the transmission optical fiber is located in front of the rear focal plane of the outgoing light beam. The outgoing light beam forms a converging spot on the front end face of the transmission optical fiber.

2. The optical lens according to claim 1, characterized in that: The lens assembly comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged along the light transmission direction; Wherein, the curvature radius of the first lens is 40 mm; The curvature radius of the second lens is 40 mm; The curvature radius of the third lens is 25 mm; The curvature radius of the fourth lens is 20 mm.

3. The optical lens according to claim 2, characterized in that: The first lens and the second lens, the second lens and the third lens, and the third lens and the fourth lens are connected by gluing.

4. The optical lens according to any one of claims 1 to 3, characterized in that: The aperture assembly includes a first adjustment sleeve, an adjustable aperture and an adjustment rod. The adjustable aperture is connected inside the lens body, and the first adjustment sleeve is arranged outside the lens body. One end of the adjustment rod is connected to the adjustment plate of the adjustable aperture, and the other end passes through the lens body and is connected to the first adjustment sleeve. The first adjustment sleeve is controlled to rotate to adjust the aperture size of the adjustable aperture through the adjustment plate.

5. The optical lens according to claim 4, characterized in that: The aperture assembly also includes a second adjustment sleeve and a slider. The second adjustment sleeve is arranged outside the lens body. One end of the slider is connected to the adjustable aperture, and the other end passes through the lens body and is connected to the second adjustment sleeve. The second adjustment sleeve is used to adjust the adjustable aperture to move in a direction perpendicular to the rear focal plane.

6. The optical lens according to claim 5, characterized in that: The lens body is provided with a through opening in a direction perpendicular to the rear focal plane, the sliding block is provided with a plurality of slots on a side facing the second adjustment sleeve, the inner wall of the second adjustment sleeve is provided with threads, and the plurality of slots pass through the opening and engage with the threads.

7. The optical lens according to any one of claims 1 to 3, characterized in that: The rear focal plane is located between the terminal end face of the emission end and the aperture assembly, the front end face of the transmission optical fiber passes through the housing and extends into the emission end, and the front end face of the transmission optical fiber is located between the rear focal plane and the aperture assembly.

8. The optical lens according to any one of claims 1 to 3, characterized in that: The emission end is provided with a threaded portion, the emission end is connected to the housing via the threaded portion, and the controlled rotation of the threaded portion is used to control the distance between the aperture assembly and the transmission optical fiber.

9. The optical lens according to any one of claims 1 to 3, characterized in that: A soft protective layer is arranged on the incident end, and the soft protective layer is used to abut against the screen to be tested.

10. A color analyzer, characterized in that: The invention comprises a shell, a transmission optical fiber, a three-color filter, a processing module and an optical lens according to any one of claims 1 to 9, wherein the transmission optical fiber, the three-color filter and the processing module are all arranged in the shell, the optical lens is connected to the shell, the optical lens penetrates the shell and forms an optical path connection with the transmission optical fiber, the optical lens is used to converge the light on the screen to be measured to form an outgoing light beam with uniform intensity, the outgoing light beam converges at the end face of the transmission optical fiber, the end face of one end of the transmission optical fiber close to the optical lens is located in front of the rear focal plane, the front is the front of the outgoing light beam entering, and the transmission optical fiber is used to guide the outgoing light beam to the three-color filter, so that the outgoing light beam reaches the processing module after passing through the three-color filter.

Images