Novel bidirectional reflectance distribution function measurement system

Abstract

The utility model relates to the technical field of bidirectional reflectance distribution function measurement, in particular to a novel bidirectional reflectance distribution function measurement system which comprises a detector rotating shaft module, a sample rotating detection table module, a light source rotating shaft module, a base supporting frame module, a lighting source, a spectrograph and a computer. By arranging the concentric support frame, the concentricity of the light source and the rotation center of the detector is ensured, the perpendicularity of the rotation shaft is also ensured, and the measurement precision of the system is improved; the design of the U-shaped tube of the rotating shaft provides dustproof protection for an internal light path, the stability of the light path is also ensured, the slotting design of the U-shaped tube facilitates fixation of the optical lenses, the distance between the lenses has an adjusting range, the sensitivity and the measurement precision of the device are improved, and the required cost is lower; according to the method, the bidirectional reflectance distribution function of the hemispherical space can be measured at a time, the measurement time is shorter, and the measurement method is simple, good in repeatability and suitable for various material surfaces.

Description

TECHNICAL FIELD

[0001] The utility model relates to two -way reflection distribution function measurement technical field especially relates to a novel two -way reflection distribution function measurement system. BACKGROUND

[0002] BRDF measuring device as a kind of optical analysis instrument, it has been widely used in target simulation, optical design, space remote sensing, material detection and other fields.Brightness refers to the luminous intensity on unit area, and the illuminance refers to the light flux received on unit area.The definition of BRDF is the ratio of the brightness of the surface scattered in the specified direction and the irradiance of single incident on the surface.

[0003] The reflection characteristics of each face and corner of target object usually show non-Lambertian, which is mainly determined by its surface profile and roughness.When imaging detection is carried out on the same object, the reflection image intensity obtained will be different due to the change of incident light source and detection angle.The anisotropy of this reflection image intensity can be described by BRDF (bidirectional reflectance distribution function).BRDF uses incident azimuth angle, incident zenith angle, detection azimuth angle and detection zenith angle and other parameters to describe the difference of reflection characteristics of target object in space.In indoor detection experiment based on BRDF principle, researchers can obtain detailed spatial reflection spectrum information by adjusting the spatial position of light source, detector or target object.

[0004] There are two kinds of absolute measurement and relative measurement for the measurement method of BRDF.Relative measurement method can reduce system error, and can also play a good inhibitory effect on stray light.Compared with absolute measurement, relative measurement has lower requirement for equipment precision, and can save measurement cost.However, the disadvantage of relative measurement method is also obvious, that is, it must rely on standard reference sample.The complete diffuse reflector has a spectral reflectance of 1 in the entire waveband.Because there is no reference standard with spectral reflectance of 1 in the entire waveband, in practical application, it is necessary to use precisely calibrated magnesium oxide, barium sulfate, polytetrafluoroethylene or other working standard white board with known absolute spectral reflectance to calibrate BRDF measuring device, so as to directly measure the BRDF distribution data of the sample to be measured on the instrument.

[0005] In the prior art, the patents with publication numbers CN102323240A, CN102175650A and CN102590150A all disclose a set of indoor full-automatic BRDF measuring device, and the optical path design of the device is not covered, which cannot achieve dust protection for optical path, and cannot avoid the influence of stray light, thereby limiting the application range of the measuring device.

[0006] The patents with publication numbers CN117347318A and CN118392827A both disclose a wide-range BRDF measuring device, and the rotation centers of the light source rotating shaft and the detector rotating shaft of the device are designed separately. However, due to the machining precision and part matching problems, it is difficult to ensure the concentricity of the rotation centers of the detector and the light source, thereby causing inaccurate measurement angles and affecting the measurement precision of the device.

[0007] The patent with publication number CN118655083A discloses a full-angle spectral image BRDF characteristic measuring device for three-dimensional body structure targets. The device has a complex structure and requires high cost. Although the design of the dust cover protects the light path and the internal device, it limits the movement of the sample during the measurement. The design of the clamp is only suitable for solid samples and is not suitable for the measurement of liquid film samples or plane samples.

[0008] To solve the above technical problems, a new bidirectional reflectance distribution function measuring system is proposed to solve the above problems. Practical new type

[0009] The purpose of the present application is to solve the problems existing in the prior art and to provide a new bidirectional reflectance distribution function measuring system.

[0010] To achieve the above purpose, the present application adopts the following technical solutions:

[0011] A new bidirectional reflectance distribution function measuring system, comprising a detector rotating shaft module, a sample rotating detection table module, a light source rotating shaft module, a base support frame module, an illumination light source, a spectrometer and a computer; the light source rotating shaft module is installed on one side of the upper end of the base support frame module, the detector rotating shaft module is installed on the other side of the upper end of the base support frame module, the detector rotating shaft module is located at the lower end of the light source rotating shaft module, and the sample rotating detection table module is located at the lower end of the detector rotating shaft module; the light source rotating shaft module and the illumination light source are jointly connected with a light source transmission optical fiber; the detector rotating shaft module and the spectrometer are jointly connected with a detection light transmission optical fiber, and the spectrometer and the computer are connected;

[0012] The front end of the detector rotating shaft module is provided with a second top-silk lens holder, a first top-silk lens holder and a first 45° mirror holder from bottom to top, the rear end of the detector rotating shaft module is provided with a detector rotating shaft, a detection light transmission optical fiber and a first collimating mirror from bottom to top, the first collimating mirror is provided with a first collimating mirror flange plate at one end close to the first 45° mirror holder, and the lower end of the detector rotating shaft module is provided with a first electric rotating platform;

[0013] The front end of the light source rotating shaft module is sequentially provided with a plano-convex lens holder and a second 45° mirror holder from bottom to top, the rear end of the light source rotating shaft module is sequentially provided with a light source transmission optical fiber, a light source rotating shaft and a third collimating mirror from bottom to top, the third collimating mirror is provided with a third collimating mirror flange plate at one end close to the second 45° mirror holder, and the lower end of the light source rotating shaft module is fixed with a second electric rotating platform.

[0014] Compared with the prior art, the concentric support frame designed in the application not only ensures the concentricity of the rotation centers of the light source and the detector, but also ensures the perpendicularity of the rotating shaft, thereby improving the measurement accuracy of the system; the U-shaped tube design of the rotating shaft not only provides dustproof protection for the internal light path, but also ensures the stability of the light path; the slotted design of the U-shaped tube not only facilitates the fixation of the optical lens, but also enables the distance between the lenses to have a certain adjustment range, thereby improving the sensitivity and measurement accuracy of the device; the cost required by the application is lower, the structure is more compact and simple, the bidirectional reflectance distribution function measurement of the hemispherical space can be realized at one time, the measurement time is shorter, and the measurement method of the application is simple and has good repeatability, and the application can be applied to various material surfaces.

[0015] Preferably, the sample rotating detection platform module comprises an electric lifting platform and a sample rotating detection platform, the electric lifting platform is installed at the upper end of the base support frame module, the sample rotating detection platform is installed at the upper end of the electric lifting platform, and the sample rotating detection platform is installed at the lower end of the second top-screw lens holder.

[0016] Further, the sample rotating detection platform is an electric rotating platform, the rotating speed and rotating angle of which can be controlled by a computer driving motor; the electric lifting platform can be controlled in height by a computer driving motor.

[0017] Preferably, the base support frame module comprises a support frame, a first L-shaped support frame, a second L-shaped support frame and a bottom plate, the support frame is in contact with the upper end of the middle of the bottom plate, the two sides of the support frame are detachably connected with the first L-shaped support frame, and the first L-shaped support frame is detachably connected to the upper end of the bottom plate.

[0018] Further, the base support frame module can fully ensure that the detector rotating shaft module and the light source rotating shaft module are coaxially rotated, so as to fully ensure the concentricity of the rotation centers of the two.

[0019] Preferably, the first 45° mirror holder comprises a third top-screw lens holder and a lens, and the lens is installed at the middle of the third top-screw lens holder.

[0020] Further, a center hole is formed in the third top-screw lens holder, the lens is placed in the center hole of the third top-screw lens holder, the lens is fixed by screwing the side screws, and the stability of the installation is ensured.

[0021] Preferably, the first collimating mirror comprises a second collimating mirror flange, a second collimating mirror and a transmission optical fiber, the transmission optical fiber is connected with the detection light transmission optical fiber, the second collimating mirror is connected with the transmission optical fiber, the second collimating mirror flange is connected with the second collimating mirror, and the second collimating mirror flange is connected with the first collimating mirror flange.

[0022] Further, the second collimating mirror flange can be fixed in the light source rotating shaft or the detector rotating shaft through screwing, and the relative position can be adjusted according to the sliding groove on the surface of the rotating shaft; one end of the second collimating mirror is a condenser lens, which is used for enhancing the sensitivity of detection or enhancing the radiant brightness of the light source on the sample, and the other end is an external thread, which is used for connecting the transmission optical fiber; the transmission optical fiber is a glass optical fiber, which is used for transmitting optical signals, and one end is connected with the collimating mirror, and the other end is connected with the light source or the spectrometer.

[0023] Preferably, the first motorized rotary stage and the second motorized rotary stage adopt Y200RA100 motorized rotary stages, the transmission ratio of which is 180:1, the resolution is 0.0005°, and the repeat positioning accuracy is 0.005°; the maximum center load is 45kg.

[0024] The first motorized rotary stage and the second motorized rotary stage are coaxially arranged.

[0025] Further, the material can be stably moved through the motorized rotary stage, and the consistency of the rotation of the detector rotating shaft module and the light source rotating shaft module can be ensured through the coaxial arrangement of the first motorized rotary stage and the second motorized rotary stage.

[0026] The utility model discloses the beneficial effect is:

[0027] 1, the base and the support frame in the base support frame module are vertically matched, the middle part of the support frame is equipped with the concentric screw hole, is used for fixed rotating platform, the detector rotating shaft and the light source rotating shaft are driven to realize the scanning in -90 ° to 90 ° range through the motor, and the detector rotating shaft and the light source rotating shaft are fixed on the support frame through the rotating platform, and the detector rotating shaft and the light source rotating shaft concentric rotation are located on the same horizontal plane with the sample surface.

[0028] 2, the detection light axis and the light source light axis always point to the sample rotating platform center.

[0029] 3, the sample rotating detection platform can adjust the measuring height according to the sample and control motor realizes 0-360 ° rotation, realizes the change of the measured azimuth angle. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1The utility model discloses a connecting structure diagram;

[0031] Figure 2 It is the internal structure diagram of the detector rotating shaft module in the utility model;

[0032] Figure 3 It is the structure diagram of the first 45 degree reflector frame in the utility model;

[0033] Figure 4 It is the structure diagram of the sample rotation detection platform module in the utility model;

[0034] Figure 5 It is the structure diagram of the light source rotating shaft module in the utility model;

[0035] Figure 6 It is the structure diagram of the base support frame module in the utility model;

[0036] Figure 7 It is the structure diagram of the first collimating mirror in the utility model;

[0037] In the drawing: 1 detector rotating shaft module, 11 first 45 degree reflector frame, 1101 third top silk type lens frame, 1102 lens, 12 first top silk type lens frame, 13 second top silk type lens frame, 14 first collimating mirror flange, 15 first collimating mirror, 1501 second collimating mirror flange, 1502 second collimating mirror, 1503 transmission optical fiber, 16 detection light transmission optical fiber, 17 detector rotating shaft, 18 first electric rotating platform, 2 sample rotation detection platform module, 21 sample rotation detection platform, 22 electric lifting platform, 3 light source rotating shaft module, 31 second 45 degree reflector frame, 32 flat convex lens frame, 33 third collimating mirror flange, 34 second electric rotating platform, 35 third collimating mirror, 36 light source rotating shaft, 37 light source transmission optical fiber, 4 base support frame module, 41 support frame, 42 first L type support frame, 43 second L type support frame, 44 bottom plate, 5 illumination light source, 6 spectrometer, 7 computer. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0039] Reference Figures 1-7A novel bidirectional reflectance distribution function measurement system, comprising a detector rotation axis module 1, a sample rotating detection platform module 2, a light source rotation axis module 3, a base support frame module 4, an illumination light source 5, a spectrometer 6 and a computer 7; through the control program of the computer 7, the rotation angle of the first electric rotating platform 18 and the second electric rotating platform 34 can be set, so as to change the rotation angle of the detector rotation axis module 1 and the light source rotation axis module 3, and then through the control program of the computer 7, the rotation angle of the sample rotating detection platform 21 and the height of the electric lifting platform 22 can be set, so as to measure the bidirectional reflectance distribution function. The light source rotation axis module 3 is installed on one side of the upper end of the base support frame module 4, the detector rotation axis module 1 is installed on the other side of the upper end of the base support frame module 4, the detector rotation axis module 1 is located at the lower end of the light source rotation axis module 3, and the sample rotating detection platform module 2 is located at the lower end of the detector rotation axis module 1. The base and the support frame in the base support frame module 4 are vertically matched, the support frame is provided with a concentric threaded hole in the middle for fixing the rotating platform. The detector rotation axis and the light source rotation axis are driven by the motor to realize scanning within the range of-90°-90°; the light source rotation axis module 3 and the illumination light source 5 are jointly connected with a light source transmission optical fiber. The detector rotation axis module 1 and the spectrometer 6 are jointly connected with a detection light transmission optical fiber, and the spectrometer 6 and the computer 7 are connected, so that information data can be effectively transmitted, and the operation of the corresponding components and the reception of information data are facilitated.

[0040] The detector rotation axis module 1 and the light source rotation axis module 3 are fixed on the base support frame module 4 through rotating equipment, and the detector rotation axis module 1 and the light source rotation axis module 3 rotate concentrically and are located at the same horizontal plane as the sample surface.

[0041] And the detector rotation axis module 1 and the light source rotation axis module 3 always point to the sample rotating detection platform module 2; the sample rotating detection platform module 2 can adjust the measurement height according to the sample and control the motor to realize rotation of 0-360°, so as to realize the change of the measurement azimuth angle.

[0042] Referring to Figure 1 , 2 , 7, the front end in the detector rotation axis module 1 is sequentially provided with a second top-silk lens holder 13, a first top-silk lens holder 12 and a first 45° mirror holder 11 from bottom to top. The rear end in the detector rotation axis module 1 is sequentially provided with a detector rotation axis 17, a detection light transmission optical fiber 16 and a first collimating mirror 15 from bottom to top. The first collimating mirror 15 is installed with a first collimating mirror flange 14 at one end close to the first 45° mirror holder 11, and the lower end of the detector rotation axis module 1 is installed with a first electric rotating platform 18.

[0043] Referring to Figure 1 , 2, 7, the probe rotating shaft 17 is a double vertical U-shaped aluminum alloy pipe, the material is 7075 aviation aluminum alloy (Brinell hardness is 150HB), and equal-thickness triangular reinforcing sheets are welded at vertical angle parts of the probe rotating shaft 17, so that the deformation caused by stress during rotation of the probe rotating shaft 17 is reduced. Two reinforcing ribs are welded near the bottom of the lens, so that the stability and strength of the probe rotating shaft 17 are improved. The inside of the rotating shaft is a probe transmission light path, and corresponding sliding grooves and threaded holes are formed on the surface of the probe rotating shaft 17, so that the movement and screwing of the internal lens holder and the probe are facilitated. A set of threaded holes are arranged at the right end of the rotating shaft, which are used for connecting the first electric rotating platform 18, and a central through hole is used for passing the probe light transmission optical fiber 16.

[0044] With reference to Figure 1 , 2 , the probe transmission light path is sample-second top silk type lens holder 13-first top silk type lens holder 12-first 45° mirror holder 11-first collimating mirror flange 14-first collimating mirror 15 and probe light transmission optical fiber 16-spectrometer. The first 45° mirror holder 11, the first top silk type lens holder 12 and the second top silk type lens holder 13 are screw-fixed in the U-shaped rotating shaft, and the probe is screw-fixed in the U-shaped rotating shaft; and sliding grooves are formed at the first 45° mirror holder 11 and the probe fixing hole, so that the first 45° mirror holder 11 and the probe can slide through the sliding grooves, so as to change the distance between the lenses, and then adjust the detection strength and detection range of the probe.

[0045] With reference to Figure 2 , the mirror in the first 45° mirror holder 11 is used for focusing the probe light, so as to ensure the sensitivity of the probe. The lens 1102 is used for transmitting the probe light and enhancing the brightness of the probe light. The mirror in the first 45° mirror holder 11 is used for changing the transmission direction of the probe light, so that the light realizes 90° vertical direction change, and then reaches the probe.

[0046] With reference to Figure 1 , 3 , 5, the front end of the light source rotating shaft module 3 is sequentially provided with a plano-convex lens holder 32 and a second 45° mirror holder 31 from bottom to top, and the rear end of the light source rotating shaft module 3 is sequentially provided with a light source transmission optical fiber 37, a light source rotating shaft 36 and a third collimating mirror 35 from bottom to top, the third collimating mirror 35 is provided with a third collimating mirror flange 33 at one end close to the second 45° mirror holder 31, and the lower end of the light source rotating shaft module 3 is fixed with a second electric rotating platform 34 on one side.

[0047] With reference to Figure 1 , 3, 5, the light source rotating shaft 36 is a double vertical U-shaped aluminum alloy pipe, the material is 7075 aviation aluminum alloy (Brinell hardness is 150HB), and equal-thickness triangular reinforcing sheets are welded at double vertical angle portions of the double vertical U-shaped aluminum alloy pipe to reduce deformation caused by stress during rotation. Two reinforcing ribs are welded near the bottom of the lens to improve the stability and strength of the rotating shaft. The inside of the rotating shaft is a light source transmission light path. The surface of the rotating shaft 36 is provided with corresponding sliding grooves and threaded holes, which facilitate the movement and screwing of the internal lens holder and the probe.

[0048] Referring to Figure 1 , 3 , 5, the light source transmission light path is a light source-illumination light transmission optical fiber-probe of the light source-a second 45° reflecting mirror holder 31-a plano-convex lens holder 32-a sample. The second 45° reflecting mirror holder 31 and the plano-convex lens holder 32 are screw-fixed in the U-shaped rotating shaft, and the probe of the light source is screw-fixed in the U-shaped rotating shaft. Sliding grooves are formed in the fixed holes of the plano-convex lens holder 32 and the probe of the light source, and the plano-convex lens holder 32 and the probe of the light source can slide through the sliding grooves to change the distance between the lenses, thereby adjusting the illumination brightness and illumination range of the illumination light.

[0049] Referring to Figure 1 , 4 , the sample rotating detection table module 2 includes an electric lifting platform 22 and a sample rotating detection platform 21. The electric lifting platform 22 is installed at the upper end of the base support frame module 4, and the sample rotating detection platform 21 is installed at the upper end of the electric lifting platform 22. The sample rotating detection platform 21 is installed at the lower end of the second top-thread type lens holder 13. The sample rotating detection platform 21 is an electric rotating platform, and the rotating speed and angle thereof can be controlled by a computer-driven motor. The height of the electric lifting platform 22 can be controlled by a computer-controlled motor.

[0050] Referring to Figure 1 , 6 , the base support frame module 4 includes a support frame 41, a first L-shaped support frame 42, a second L-shaped support frame 43, and a bottom plate 44. The support frame 41 abuts the upper middle part of the bottom plate 44. The first L-shaped support frame 42 is detachably connected to the upper end of the bottom plate 44.

[0051] Referring to Figure 1 , 6 , the bottom plate 44 is a counterweight aluminum alloy plate, and a fitting groove is arranged at the center of the bottom plate 44. The fitting groove is matched with the support frame. A countersunk threaded hole is arranged at the bottom of the fitting groove. After the threaded hole at the bottom of the fitting groove is screw-fixed with a screw, the fitting groove is used for vertically fixing the support frame, so as to ensure the perpendicularity of the bottom plate and the support frame.

[0052] The four corners of the bottom plate 44 are provided with countersunk threaded holes, which can be screwed and fixed on the optical platform; the support frame 41 is an aluminum alloy plate, the center of the plate is an optical fiber through hole, the transmission optical fiber of the rotating shaft can pass through the optical fiber through hole, and four rotating platform fixing threaded holes are arranged around the optical fiber through hole, and the four threaded holes pass through the whole support frame, the first electric rotating platform 18 and the second electric rotating platform 34 are screwed and fixed on the support frame by screws, and the concentricity of the two rotating platforms is well guaranteed.

[0053] The first L-shaped support frame 42 is as wide as the support frame 41 and is symmetrically distributed on both sides of the support frame, and is screwed and fixed with the support frame and the bottom plate by using countersunk screws and six threaded screws, and can also offset the stress generated during assembly.

[0054] The second L-shaped support frame 43 is symmetrically distributed on the front and back of the support frame 41, and is used for further fixing the bottom plate 44 and the support frame 41 and offsetting the stress during assembly.

[0055] Referring to Figure 3 , the first 45° mirror frame 11 includes a third top silk type lens frame 1101 and a lens 1102, and the lens 1102 is installed in the middle of the third top silk type lens frame 1101; a center hole is formed in the third top silk type lens frame 1101, the lens 1102 is placed in the center hole of the third top silk type lens frame 1101, and the lens 1102 is fixed by rotating the side screws to ensure the stability of the installation.

[0056] Referring to Figure 2 , 7 , the first collimating mirror 15 includes a second collimating mirror flange 1501, a second collimating mirror 1502 and a transmission optical fiber 1503, the transmission optical fiber 1503 is connected with the detection light transmission optical fiber 16, the second collimating mirror 1502 is connected with the transmission optical fiber 1503, the second collimating mirror flange 1501 is connected with the second collimating mirror 1502, and the second collimating mirror flange 1501 is connected with the first collimating mirror flange 14. The second collimating mirror flange 1501 can be screwed and fixed on the light source rotating shaft or the detector rotating shaft, and the relative position can be adjusted according to the sliding groove on the surface of the rotating shaft. One end of the second collimating mirror 1502 is a condenser lens, which is used to enhance the sensitivity of detection or enhance the brightness of the light source on the sample, and the other end is an external thread, which is used to connect the transmission optical fiber 1503. The transmission optical fiber 1503 is a glass optical fiber, which is used to transmit optical signals, one end of which is connected with the collimating mirror, and the other end of which is connected with the light source or the spectrometer.

[0057] Referring to Figure 5 , the mirror in the second 45° mirror frame 31 is used to change the transmission direction of the illumination light, so that the light realizes 90° vertical direction change, and then reaches the plano-convex lens frame 32; the plano-convex lens frame 32 is used for transmitting light and focusing, and its focal point is located on the surface of the sample, which ensures the spot brightness of the light source on the sample.

[0058] Referring to Figure 1 、 2 , 5, 6, the first motorized rotary platform 18 and the second motorized rotary platform 34 are Y200RA100 motorized rotary platforms, the transmission ratio of which is 180:1, the resolution is 0.0005°, and the repeat positioning accuracy is 0.005°; the maximum center load is 45kg. The first motorized rotary platform 18 and the second motorized rotary platform 34 are installed on the two sides of the base support frame module 4, and the first motorized rotary platform 18 and the second motorized rotary platform 34 are coaxially arranged.

[0059] In the utility model, when using, the operator carries out operation according to the following steps:

[0060] Step one, standard measurement standard white board: through the computer setting the rotation angle of light source rotation shaft, setting the average number of spectrometer, the sample is placed on the sample table, the height of the sample table is adjusted through the computer, the center of the sample is ensured to be in the motion ball center of the measuring device, that is, the artificial light source light spot and the observation field center are always coincided with the sample table center; the measurement is executed, the exposure time of the spectrometer is changed, so that the highest value of the spectral response intensity of the white board is between 50000-60000, the rotation angle of the detector rotation shaft is controlled by the computer input data, and the spectral response intensity of the white board is basically unchanged under different detector angles, so as to correct the measurement error caused by changes of optical elements, mechanical structure and electronic devices, and after the calibration is completed, the sample is measured again; here, the relative position of the standard white board and the instrument and the relative position of the sample and the instrument are required to be the same, so as to ensure the same measurement condition.

[0061] Step two, measure the sample: through the control interface of the computer, set the observation zenith angle interval and the azimuth angle interval, the observation lens is positioned at each position in space to observe the reflection of the sample, and the computer displays and stores the measurement data in real time; when abnormal condition occurs in measurement, the measurement can be stopped urgently; after the measurement is completed, the light source rotation shaft, the detector rotation shaft and the sample rotating lifting platform all return to the initial zero-degree position.

[0062] Step three, change the measurement parameters of the light source rotation shaft and the detector rotation shaft or replace the sample to repeat the above steps; the BRDF of the sample is obtained through the computer data processing module.

[0063] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A novel bidirectional reflectance distribution function measurement system, comprising a probe rotating shaft module (1), a sample rotating detection table module (2), a light source rotating shaft module (3), a base support frame module (4), an illumination light source (5), a spectrometer (6) and a computer (7); characterized in that: The light source rotating shaft module (3) is installed on one side of the upper end of the base support frame module (4), the detector rotating shaft module (1) is installed on the other side of the upper end of the base support frame module (4), the detector rotating shaft module (1) is located at the lower end of the light source rotating shaft module (3), and the sample rotating detection table module (2) is located at the lower end of the detector rotating shaft module (1); the light source rotating shaft module (3) and the illumination light source (5) are jointly connected with a light source transmission optical fiber; the detector rotating shaft module (1) and the spectrometer (6) are jointly connected with a detection light transmission optical fiber, and the spectrometer (6) is connected with the computer (7); The front end in the detector rotating shaft module (1) is sequentially provided with a second top pin type lens holder (13), a first top pin type lens holder (12) and a first 45° mirror holder (11) from bottom to top, the rear end in the detector rotating shaft module (1) is sequentially provided with a detector rotating shaft (17), a detection light transmission optical fiber (16) and a first collimating mirror (15) from bottom to top, the first collimating mirror (15) is provided with a first collimating mirror flange (14) at one end close to the first 45° mirror holder (11), and the lower end of the detector rotating shaft module (1) is provided with a first electric rotating platform (18). The front end in the light source rotating shaft module (3) is sequentially provided with a plano-convex lens holder (32) and a second 45° mirror holder (31) from bottom to top, the rear end in the light source rotating shaft module (3) is sequentially provided with a light source transmission optical fiber (37), a light source rotating shaft (36) and a third collimating mirror (35) from bottom to top, the third collimating mirror (35) is provided with a third collimating mirror flange (33) at one end close to the second 45° mirror holder (31), and one side of the lower end of the light source rotating shaft module (3) is fixedly provided with a second electric rotating platform (34).

2. A novel bidirectional reflectance distribution function measurement system according to claim 1, characterized in that: The sample rotating detection table module (2) comprises an electric lifting platform (22) and a sample rotating detection platform (21), the electric lifting platform (22) is installed at the upper end of the base support frame module (4), the sample rotating detection platform (21) is installed at the upper end of the electric lifting platform (22), and the sample rotating detection platform (21) is installed at the lower end of the second top pin type lens holder (13).

3. The novel system for measuring bidirectional reflectance distribution function according to claim 1, characterized in that: The base support frame module (4) comprises a support frame (41), a first L-shaped support frame (42), a second L-shaped support frame (43) and a bottom plate (44), the support frame (41) abuts the middle of the upper end of the bottom plate (44), and the two sides of the support frame (41) are detachably connected with the first L-shaped support frame (42), and the first L-shaped support frame (42) is detachably connected to the upper end of the bottom plate (44).

4. The novel system for measuring bidirectional reflectance distribution function according to claim 1, characterized in that: The first 45° mirror holder (11) comprises a third top pin type lens holder (1101) and a lens (1102), and the lens (1102) is installed in the middle of the third top pin type lens holder (1101).

5. The novel system for measuring bidirectional reflectance distribution function according to claim 1, characterized in that: The first collimating mirror (15) comprises a second collimating mirror flange (1501), a second collimating mirror (1502) and a transmission optical fiber (1503), the transmission optical fiber (1503) is connected with a detection light transmission optical fiber (16), the second collimating mirror (1502) is connected with the transmission optical fiber (1503), the second collimating mirror flange (1501) is connected with the second collimating mirror (1502), and the second collimating mirror flange (1501) is connected with the first collimating mirror flange (14).

6. The novel system for measuring bidirectional reflectance distribution function according to claim 1, characterized in that: The first electric rotating platform (18) and the second electric rotating platform (34) are Y200RA100 electric rotating platforms, the transmission ratio of which is 180:1, the resolution is 0.0005°, the repeat positioning accuracy is 0.005°, and the maximum center load is 45kg. The first electric rotating platform (18) and the second electric rotating platform (34) are coaxially arranged on the two sides of the base support frame module (4).

Images