BRDF testing device

Abstract

The utility model discloses a BRDF testing device, and relates to the technical field of optical radiation testing devices. Comprising a light source and a carrying module arranged in the light emitting direction of the light source, the carrying module comprises a first lifting base and a first rotary table arranged on the first lifting base, a rotating shaft of the first rotary table, the light emitting direction of the light source and the lifting direction of the first lifting base are perpendicular in pairs, and the first rotary table is used for installing a sample to be tested; a second rotary table coaxially rotating with the first rotary table is further arranged on the first lifting seat, a detection module is arranged on the second rotary table, a light beam emitted by the light source is projected to a to-be-detected sample, and the detection module is used for detecting a light beam reflected by the to-be-detected sample. The size of the BRDF testing device can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of optical radiation testing devices, and in particular to a BRDF testing device. Background Art

[0002] Most of the reflection of natural objects is non-Lambertian, that is, the reflection characteristics of the target are related to the wavelength and the geometric direction of incidence and reflection. Measuring the bidirectional reflectance distribution function (BRDF) of an object can accurately describe the directional reflection anisotropy of the object. BRDF reflects the essential properties of the object.

[0003] The measurement principle of BRDF is to illuminate the object with a light source, and the sensor observes the object in all directions in space. By processing the reflection values ​​in each observation direction, the directional reflection characteristics of the object can be characterized, and a mathematical model can be established to describe the BRDF characteristics of the object.

[0004] Most of the commonly used BRDF detectors currently use fixed samples and use 2-3-stage cantilevers to make the detector move spherically around the sample to collect data. This collection method makes the detector larger in size. Utility Model Content

[0005] The purpose of the present application is to provide a BRDF testing device, which can reduce the volume of the BRDF testing device.

[0006] The embodiment of the present application is implemented as follows:

[0007] The present application provides a BRDF testing device, comprising a light source and a carrier module arranged in the light emitting direction of the light source, the carrier module comprising a first lifting seat and a first turntable arranged on the first lifting seat, the rotation axis of the first turntable, the light emitting direction of the light source and the lifting direction of the first lifting seat are perpendicular to each other, the first turntable is used to install a sample to be tested, the first lifting seat is also provided with a second turntable that rotates coaxially with the first turntable, the second turntable is provided with a detection module, the light beam emitted by the light source is projected onto the sample to be tested, and the detection module is used to detect the light beam reflected by the sample to be tested.

[0008] Optionally, as an implementable manner, a light source adjustment module is further arranged between the light source and the loading module, the light source adjustment module comprises a second lifting seat and a third lifting seat parallel to the first lifting seat, the second lifting seat is provided with a light source mounting seat for installing the light source, the third lifting seat is provided with a light source collimation unit, and the third lifting seat is arranged between the first lifting seat and the second lifting seat.

[0009] Optionally, as an implementable manner, an iris lifting seat is further provided between the first lifting seat and the third lifting seat, and an iris is mounted on the iris lifting seat, and the iris adjusts the size of the light beam emitted by the light source.

[0010] Optionally, as an implementable manner, the detection module is mounted on the second turntable via a cantilever assembly.

[0011] Optionally, as an implementable manner, the cantilever assembly includes a first cantilever and a second cantilever slidably connected to each other, one end of the first cantilever is connected to the second turntable, and the other end is slidably connected to the second cantilever, the other end of the second cantilever is used to install the detection module, the extension direction of the first cantilever is perpendicular to the extension direction of the second cantilever, and the extension direction of the second cantilever is parallel to the rotation axis of the second turntable.

[0012] Optionally, as an implementable manner, a fixing seat is slidably provided on the second cantilever, and the fixing seat is used to install the detection module.

[0013] Optionally, as an implementable manner, it further includes a shielding cover, which simultaneously covers the light source, the light source adjustment module and the object carrying module.

[0014] Optionally, as an implementable manner, the light source is a laser light source or a wide spectrum light source.

[0015] Optionally, as an implementable manner, the detection module includes an optical fiber and a spectrometer electrically connected to each other, and the optical fiber transmits the collected optical signal to the spectrometer.

[0016] Optionally, as an implementable manner, the detection module is a silicon photodetector.

[0017] The beneficial effects of the embodiments of the present application include:

[0018] The BRDF testing device provided by the present application includes a light source and a carrier module arranged in the light emitting direction of the light source, the carrier module includes a first lifting seat and a first turntable arranged on the first lifting seat, the rotation axis of the first turntable, the light emitting direction of the light source and the lifting direction of the first lifting seat are perpendicular to each other, the first turntable is used to install the sample to be tested, so that the light beam emitted by the light source can be projected onto the sample to be tested, while ensuring that the rotation direction of the first turntable and the light emitting direction of the light source do not interfere with each other, the first lifting seat is also provided with a second turntable that rotates coaxially with the first turntable, the second turntable is provided with a detection module, the light beam emitted by the light source is projected onto the sample to be tested, the detection module is used to detect the light beam reflected by the sample to be tested, the sample to be tested is driven to rotate by the first turntable, and the second turntable drives the detection module to rotate, so as to reduce the volume of the BRDF testing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a BRDF testing device provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of a loading module in a BRDF testing device provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the structure of a light source adjustment module in a BRDF testing device provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of the cantilever assembly in the BRDF testing device provided in an embodiment of the present application.

[0024] Icons: 100-BRDF test device; 110-light source; 120-carrying module; 121-first lifting seat; 122-first turntable; 123-second turntable; 130-detection module; 140-light source adjustment module; 141-second lifting seat; 142-light source mounting seat; 143-third lifting seat; 144-light source collimation unit; 145-aperture lifting seat; 146-aperture; 150-cantilever assembly; 151-first cantilever; 152-second cantilever; 153-fixed seat. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0027] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] Please refer to Figure 1 , Figure 2 and Figure 3 The present embodiment provides a BRDF testing device 100, comprising a light source 110 and a carrier module 120 arranged in the light emitting direction of the light source 110, the carrier module 120 comprising a first lifting seat 121 and a first turntable 122 arranged on the first lifting seat 121, the rotation axis of the first turntable 122, the light emitting direction of the light source 110 and the lifting direction of the first lifting seat 121 are perpendicular to each other, the first turntable 122 is used to install a sample to be tested, the first lifting seat 121 is also provided with a second turntable 123 coaxially rotating with the first turntable 122, the second turntable 123 is provided with a detection module 130, the light beam emitted by the light source 110 is projected onto the sample to be tested, and the detection module 130 is used to detect the light beam reflected by the sample to be tested.

[0030] Specifically, the rotation axis of the first turntable 122, the light emitting direction of the light source 110 and the lifting direction of the first lifting seat 121 are perpendicular to each other, in order to ensure that the incident angle of the light beam emitted by the light source 110 projected onto the sample to be tested can be directly read through the rotation scale of the first turntable 122, and at the same time ensure that the angle of the reflected light can be directly read through the rotation scale of the second turntable 123. When using the BRDF testing device 100 of the present application, a sample to be tested is installed on the first turntable 122, and the sample to be tested is coaxially arranged with the first turntable 122. A detection module 130 is installed on the second turntable 123. The light beam emitted by the light source 110 is projected onto the sample to be tested, and the first turntable 122 is rotated to drive the sample to be tested arranged on the first turntable 122 to rotate. The sample to be tested is driven to rotate by the first turntable 122, and the detection module 130 is driven to rotate by the second turntable 123, thereby avoiding the situation where the detection range of the detection module 130 is limited only by rotation. The first turntable 122 and the second turntable 123 rotate coaxially, and the first turntable 122 drives the sample to be tested to rotate so that the rotation radius is minimized, so as to reduce the volume of the BRDF testing device 100.

[0031] Furthermore, the height of the first rotating platform 122 and the second rotating platform 123 may be made consistent with the projection height of the light source 110 by adjusting the lifting height of the first lifting seat 121 .

[0032] Furthermore, a carrier may be coaxially arranged on the mounting surface of the first turntable 122 , so that the sample to be tested can be mounted through the carrier, thereby ensuring that the carrier can be stably fixed and rotate with the first turntable 122 .

[0033] It should be noted that scales and locking nuts are provided on the first turntable 122 and the second turntable 123. The scales are used to ensure the rotation accuracy of the first turntable 122 and the second turntable 123, and the locking nuts are used to lock the first turntable 122 and the second turntable 123 with adjusted rotation angles.

[0034] The BRDF testing device 100 provided in the present application comprises a light source 110 and a carrier module 120 arranged in the light emitting direction of the light source 110, the carrier module 120 comprises a first lifting seat 121 and a first turntable 122 arranged on the first lifting seat 121, the rotation axis of the first turntable 122, the light emitting direction of the light source 110 and the lifting direction of the first lifting seat 121 are perpendicular to each other, the first turntable 122 is used to install the sample to be tested, so that the light beam emitted by the light source 110 can be projected onto the sample to be tested, and at the same time ensure that the first The rotation direction of the turntable 122 and the light emitting direction of the light source 110 will not interfere with each other. A second turntable 123 coaxially rotating with the first turntable 122 is further provided on the first lifting seat 121. A detection module 130 is provided on the second turntable 123. The light beam emitted by the light source 110 is projected onto the sample to be tested. The detection module 130 is used to detect the light beam reflected by the sample to be tested. The sample to be tested is driven to rotate by the first turntable 122, and the second turntable 123 drives the detection module 130 to rotate, so as to reduce the volume of the BRDF testing device 100.

[0035] In a feasible embodiment of the present application, Figure 1 , Figure 2 and Figure 3 As shown, a light source adjustment module 140 is further arranged between the light source 110 and the loading module 120. The light source adjustment module 140 includes a second lifting seat 141 and a third lifting seat 143 which are parallel to the first lifting seat 121. The second lifting seat 141 is provided with a light source mounting seat 142 for mounting the light source 110. The third lifting seat 143 is provided with a light source collimation unit 144. The third lifting seat 143 is arranged between the first lifting seat 121 and the second lifting seat 141.

[0036] When assembling the BRDF testing device 100 of the present application, the first turntable 122 and the second turntable 123 are installed on the first lifting seat 121, the light source mounting seat 142 is installed on the second lifting seat 141, and the light source collimating unit 144 is installed on the third lifting seat 143. Then, the sample to be tested is installed on the first turntable 122, and the sample to be tested is coaxially arranged with the first turntable 122. The detection module 130 is installed on the second turntable 123, and the third lifting seat 143 is arranged between the first lifting seat 121 and the second lifting seat 141, so that the light beam emitted by the light source 110 is adjusted by the light source collimating unit 144 and then projected to the sample to be tested. The first turntable 122 is rotated to drive the sample to be tested set on the first turntable 122 to rotate. The sample to be tested is driven to rotate by the first turntable 122, and the second turntable 123 drives the detection module 130 to rotate, thereby avoiding the situation that only the detection module 130 is limited in the detection range, so as to detect the bidirectional reflection distribution function of the sample to be tested.

[0037] In a feasible embodiment of the present application, Figure 1 , Figure 2 and Figure 3 As shown, an aperture lifting seat 145 is further disposed between the first lifting seat 121 and the third lifting seat 143 , and an aperture 146 is mounted on the aperture lifting seat 145 , and the aperture 146 is used to adjust the size of the light beam emitted by the light source 110 .

[0038] Specifically, when assembling the BRDF testing device 100 of the present application, the first turntable 122 and the second turntable 123 are installed on the first lifting seat 121, the light source mounting seat 142 is installed on the second lifting seat 141, the light source collimating unit 144 is installed on the third lifting seat 143, and the diaphragm 146 is installed on the diaphragm lifting seat 145. Then, the sample to be tested is installed on the first turntable 122, and the sample to be tested is coaxially arranged with the first turntable 122. The detection module 130 is installed on the second turntable 123, and the third lifting seat 143 is arranged between the first lifting seat 121 and the second lifting seat 141, so that the light beam emitted by the light source 110 passes through the light source collimation unit 144. The unit 144 is adjusted and projected onto the sample to be tested, and the size of the light beam emitted by the light source 110 is adjusted through the aperture 146. The light emitting direction of the light source 110, the axis of the light source collimation unit 144, and the axis of the aperture 146 are adjusted to be coaxial, that is, the optical axis of the light path. The rotation axis of the first turntable 122 is perpendicular to the optical axis. The first turntable 122 is rotated to drive the sample to be tested set on the first turntable 122 to rotate. The sample to be tested is driven to rotate by the first turntable 122, and the second turntable 123 drives the detection module 130 to rotate, thereby avoiding the situation where only the detection module 130 is limited in its detection range, so as to detect the bidirectional reflection distribution function of the sample to be tested.

[0039] Furthermore, the heights of the first lifting seat 121 , the second lifting seat 141 , the third lifting seat 143 and the aperture lifting seat 145 can be adjusted so that the light beam emitted by the light source 110 is adjusted through the light source collimating unit 144 and the aperture 146 and then projected onto the sample to be tested.

[0040] In a feasible embodiment of the present application, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the detection module 130 is mounted on the second turntable 123 via a cantilever assembly 150 .

[0041] Furthermore, the cantilever assembly 150 includes a first cantilever 151 and a second cantilever 152 which are slidably connected to each other, one end of the first cantilever 151 is connected to the second turntable 123, and the other end is slidably connected to the second cantilever 152, and the other end of the second cantilever 152 is used to install the detection module 130, the extension direction of the first cantilever 151 is perpendicular to the extension direction of the second cantilever 152, and the extension direction of the second cantilever 152 is parallel to the rotation axis of the second turntable 123.

[0042] Specifically, the detection module 130 is installed on the second cantilever 152. When the detection module 130 is installed on the second turntable 123, the first cantilever 151 is first installed on the second turntable 123, and the second cantilever 152 is installed at the other end of the first cantilever 151, and the detection module 130 is installed at the other end of the second cantilever 152. During the debugging process, the heights of the first lifting seat 121, the second lifting seat 141, the third lifting seat 143 and the aperture lifting seat 145 are adjusted, and the first rotating shaft and the second rotating shaft are rotated to adjust the light emitting direction of the light source 110, the axis of the aperture 146 and the axis of the detection surface of the detection module 130 to be coaxial, that is, the optical axis of the light path. The rotation axis of the first turntable 122 is perpendicular to the optical axis. In order to ensure that the incident angle of the light beam emitted by the light source 110 projected onto the sample to be tested can be directly read through the rotation scale of the first turntable 122, and at the same time ensure that the angle of the reflected light can be directly read through the rotation scale of the second turntable 123.

[0043] In a feasible embodiment of the present application, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a fixing seat 153 is slidably provided on the second cantilever 152 , and the fixing seat 153 is used to install the detection module 130 .

[0044] Specifically, a fixed seat 153 is slidably set on the second cantilever 152 so that the detection module 130 can slide relative to the second cantilever 152 to facilitate the position adjustment of the detection module 130. During the debugging process, the heights of the first lifting seat 121, the second lifting seat 141, the third lifting seat 143 and the aperture lifting seat 145 are adjusted, and the first rotating shaft and the second rotating shaft are rotated to adjust the position of the fixed seat 153 on the second cantilever 152 to adjust the light emitting direction of the light source 110, the axis of the aperture 146 and the axis of the detection surface of the detection module 130 to be coaxial, that is, the optical axis of the light path. The rotation axis of the first turntable 122 is perpendicular to the optical axis, so that the detection module 130 can stably detect the light reflected from the sample to be tested.

[0045] In a feasible embodiment of the present application, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a shielding cover is also included, and the light source 110, the light source adjustment module 140 and the object loading module 120 are arranged in the shielding cover.

[0046] Specifically, the light source 110, the light source adjustment module 140 and the object loading module 120 are arranged in a shielding cover, and the shielding cover is used to isolate external light to ensure that the detection data is accurate.

[0047] Furthermore, a light absorbing material is attached to the inner wall of the shielding cover, and the light beam emitted by the light source 110 is projected onto the inner wall of the shielding cover and then reflected by the inner wall of the shielding cover, thereby ensuring the accuracy of the detection data.

[0048] In a feasible embodiment of the present application, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the light source 110 is a laser light source 110 or a broad spectrum light source 110 .

[0049] When the light source 110 is a wide-spectrum light source 110 , the detection module 130 includes an optical fiber and a spectrometer electrically connected to each other, and the collected optical signal is transmitted to the spectrometer via the optical fiber to achieve data measurement during wide-spectrum detection.

[0050] When the light source 110 is a laser light source 110, the detection module 130 is a silicon photodetector. By measuring data twice with a wide spectrum and a narrow spectrum, bidirectional reflectance distribution functions of different wavelengths can be obtained, which makes up for the contradiction between measuring time and dynamic range with only a spectrometer.

[0051] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A BRDF testing device, characterized in that: The invention comprises a light source and a carrier module arranged in the light emitting direction of the light source, the carrier module comprises a first lifting seat and a first turntable arranged on the first lifting seat, the rotation axis of the first turntable, the light emitting direction of the light source and the lifting direction of the first lifting seat are perpendicular to each other, the first turntable is used to install the sample to be tested, the first lifting seat is also provided with a second turntable coaxially rotating with the first turntable, the second turntable is provided with a detection module, the light beam emitted by the light source is projected onto the sample to be tested, and the detection module is used to detect the light beam reflected by the sample to be tested.

2. The BRDF testing device according to claim 1, characterized in that: A light source adjustment module is also arranged between the light source and the loading module, and the light source adjustment module includes a second lifting seat and a third lifting seat parallel to the first lifting seat, the second lifting seat is provided with a light source mounting seat for mounting the light source, the third lifting seat is provided with a light source collimation unit, and the third lifting seat is arranged between the first lifting seat and the second lifting seat.

3. The BRDF testing device according to claim 2, characterized in that: An aperture lifting seat is also arranged between the first lifting seat and the third lifting seat, and an aperture is installed on the aperture lifting seat, and the aperture is used to adjust the size of the light beam emitted by the light source.

4. The BRDF testing device according to claim 1, characterized in that: The detection module is mounted on the second turntable via a cantilever assembly.

5. The BRDF testing device according to claim 4, characterized in that: The cantilever assembly includes a first cantilever and a second cantilever which are slidably connected to each other, one end of the first cantilever is connected to the second turntable, and the other end is slidably connected to the second cantilever, the other end of the second cantilever is used to install the detection module, the extension direction of the first cantilever is perpendicular to the extension direction of the second cantilever, and the extension direction of the second cantilever is parallel to the rotation axis of the second turntable.

6. The BRDF testing device according to claim 5, characterized in that: A fixing seat is slidably provided on the second cantilever, and the fixing seat is used for installing the detection module.

7. The BRDF testing device according to claim 2, characterized in that: It also includes a shielding cover, in which the light source, the light source adjustment module and the object carrying module are arranged.

8. The BRDF testing device according to claim 1, characterized in that: The light source is a laser light source or a wide spectrum light source.

9. The BRDF testing device according to claim 1, characterized in that: The detection module includes an optical fiber and a spectrometer electrically connected to each other, and the optical fiber transmits the collected optical signal to the spectrometer.

10. The BRDF testing device according to claim 1, characterized in that: The detection module is a silicon photodetector.

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