Crystal internal stress detection device

Abstract

The utility model provides a crystal internal stress detection device, which includes a light source, a polarizing component, a sample transfer component, a camera component and a camera transfer component which are sequentially arranged in front and back, the sample transfer component can drive the sample to move up and down, move left and right, swing left and right, and swing up and down, the camera component is arranged on the camera transfer component, and is driven by the camera transfer component to approach or move away from the light source. The utility model can realize the up and down, left and right movement, left and right and up and down swing of the sample by setting the sample transfer component, comprehensively and flexibly adjust the position and angle of the sample, and then can perform more accurate, comprehensive and flexible detection of the crystal internal stress.

Description

Technical Field

[0001] The utility model relates to the field of stress detection, in particular to a crystal internal stress detection device. Background Art

[0002] Crystal internal stress refers to the stress state inside the crystal. Its sources are mainly the following: first, the characteristics of the material. During the formation and growth of the crystal material, stress is generated due to the structure of the crystal itself and its original defects; second, external force. As a material with solid properties, the crystal will also form a certain degree of internal stress under the influence of external pressure; in addition, the magnitude of crystal internal stress is also related to temperature changes. For example, the crystal will expand thermally at high temperatures, and different materials have different expansion coefficients, which will generate internal stress. Existing internal stress detection devices can generally only adjust the positions of polarizers, cameras, etc., while the sample position is generally fixed, resulting in problems such as insufficient detection accuracy, insufficient flexibility, and limited application scenarios.

[0003] Therefore, it is necessary to design a crystal internal stress detection device to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a crystal internal stress detection device which can detect the crystal internal stress more accurately, comprehensively and flexibly.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a crystal internal stress detection device, which includes a light source, a polarizing component, a sample transfer component, a camera component and a camera transfer component arranged in sequence, the sample transfer component can drive the sample to move up and down, left and right, swing left and right and / or swing up and down, the camera component is arranged on the camera transfer component, and is driven by the camera transfer component to approach or move away from the light source.

[0006] As a further improved technical solution of the utility model, the sample transfer assembly includes a sample fixing part, a bracket arranged below the sample fixing part, an up and down shifter, a left and right shifter, a left and right swinger and an up and down swinger arranged below the bracket in sequence.

[0007] As a further improved technical solution of the utility model, a sample groove which runs horizontally through the upper surface of the fixing portion is provided, and the sample groove is opened along the front-to-back direction.

[0008] As a further improved technical solution of the utility model, when the sample transplanting assembly drives the sample to move up and down, the stroke range of the sample's up and down movement is ±6mm, and when the sample transplanting assembly drives the sample to move left and right, the stroke range of the sample's left and right movement is ±6mm.

[0009] As a further improved technical solution of the utility model, when the sample transplanting assembly drives the sample to swing left and right, the angle range of the sample's left and right swing is ±5°, and when the sample transplanting assembly drives the sample to swing up and down, the angle range of the sample's up and down swing is ±5°.

[0010] As a further improved technical solution of the utility model, the polarizing assembly includes a polarizer close to the light source and a 1 / 4 glass sheet arranged on a side of the polarizer away from the light source.

[0011] As a further improved technical solution of the present invention, the camera assembly includes a lens, a camera and a polarization characteristic element, and the polarization characteristic element has polarization angles of 0°, 45°, 90° and 135°.

[0012] As a further improved technical solution of the present invention, the camera assembly also includes an adjustment mechanism, the camera is arranged on the adjustment mechanism, and the adjustment mechanism includes a yaw displacement knob for adjusting the left and right swing angles of the camera in the horizontal direction, a pitch displacement knob for adjusting the pitch angle of the camera in the vertical direction, and a camera locking knob.

[0013] As a further improved technical solution of the utility model, the light source is an LED surface light source with a central wavelength of 500-650nm.

[0014] It can be seen from the above technical solutions that the crystal internal stress detection device of the utility model can realize the up and down, left and right movement and left and right and up and down swing of the sample by setting a sample transfer component, and can comprehensively and flexibly adjust the position and angle of the sample, thereby enabling a more accurate, comprehensive and flexible detection of the crystal internal stress; by setting a polarizing component, it helps to achieve precise polarized light control; the camera component is richly configured, with polarization characteristic elements and adjustment mechanisms with different polarization angles, which can adjust and lock the horizontal and vertical angles of the camera; an LED surface light source with a central wavelength in a specific range is used to provide stable and suitable lighting conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of a crystal internal stress detection device according to an embodiment of the present invention.

[0016] Figure 2 for Figure 1 Side view of the device for detecting internal stress in a crystal.

[0017] Figure 3 for Figure 1 A three-dimensional view of the sample transfer assembly. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Please refer to Figure 1 and Figure 2 As shown, the utility model provides a crystal internal stress detection device, which includes a light source 11, a polarizing component 12, a sample transfer component 20, a camera component 30, a camera transfer component 50 and a support frame 40 arranged in sequence.

[0020] The light source 11 is preferably a light source that can emit monochromatic light with a central wavelength, so that the influence of light of other wavelengths can be eliminated, so that the camera component 30 can capture images with higher definition. Preferably, the light source 11 is an LED surface light source with a central wavelength of 500-650nm, and the central wavelength is further preferably 590nm. The polarizing component 12 includes a polarizer close to the light source 11 and a 1 / 4 glass plate arranged on the side of the polarizer away from the light source 11. The natural light emitted by the light source 11 is converted into linear polarized light after passing through the polarizer, and then converted into circular polarized light after passing through a 1 / 4 wave plate (the slow axis of the wave plate is ±45° with the polarizer).

[0021] Please also refer to Figure 3 As shown, the sample transfer assembly 20 is used to drive the sample 100 to move up and down, move left and right, swing left and right, and swing up and down. Specifically, the sample transfer assembly 20 includes a sample fixing portion 21, a bracket 22 disposed below the sample fixing portion 21, an up and down shifter 23, a left and right shifter 24, a left and right swinger 25, and an up and down swinger 26 disposed below the bracket 22 in sequence, to ensure that the sample to be tested is located at the center of the camera's field of view.

[0022] In this embodiment, the sample is a rod-shaped YAG crystal, and therefore, a horizontally penetrating sample slot is provided on the upper surface of the sample fixing portion 21, and the sample slot is opened in the front-to-back direction, and the sample is placed in the sample slot. In other embodiments, the style of the sample fixing portion can be designed according to the specific shape of the sample, which is not limited here. In this embodiment, the stroke range of the sample 100 moving up and down is ±6mm, and the stroke range of the sample moving left and right is ±6mm. The angle range of the sample 100 swinging left and right is ±5°, and the angle range of the sample 100 swinging up and down is ±5°.

[0023] The camera assembly 30 includes a lens 31, a camera 32, a polarization characteristic element (not shown) and an adjustment mechanism 33. The polarization characteristic element has polarization angles of 0°, 45°, 90° and 135°. The circularly polarized light coming out of the 1 / 4 wave plate passes through the sample 100 and is affected by its internal stress. After passing through the sample 100, the circularly polarized light is decomposed into two polarized lights with an optical path difference and polarization directions perpendicular to each other. After further passing through the polarization characteristic element, the camera 32 acquires images of different polarization angles of the sample under test. The setting of the polarization characteristic element can measure the stress value and stress 3D distribution of the entire shooting area of ​​the sample by taking a picture once, which expands the measurement range of the crystal internal stress detection device of the present invention.

[0024] The camera 32 is arranged on the adjustment mechanism 33, which specifically includes a yaw displacement knob for adjusting the left and right swing angle of the camera 32 in the horizontal direction, a pitch displacement knob for adjusting the pitch angle of the camera 32 in the vertical direction, and a camera locking knob.

[0025] The camera moving assembly 50 is disposed on the supporting frame 40 , and the camera assembly 30 is disposed on the camera moving assembly 50 , and is driven by the camera moving assembly 50 to move closer to or farther from the light source 11 .

[0026] During operation, the operator first performs calibration before placing the sample, and operates the test software to capture the background image of the corresponding polarization angle. Then the sample is placed on the sample fixing part 21, and the stress detection is performed through the test software. First, the light emitted by the light source 11 becomes circularly polarized light after passing through the polarizer and the 1 / 4 wave plate. Due to the stress inside the crystal, the polarized light is decomposed into two polarized lights with an optical path difference and polarization directions perpendicular to each other after passing through the stressed crystal to be tested. The image processing component calculates the stress inside the glass based on the captured image brightness information.

[0027] Terms such as "upper", "lower", "front", "back", "left", "right" and the like used herein to indicate spatial relative positions are used for the purpose of convenience to describe the relationship of one feature relative to another feature as shown in the drawings. It is understood that, depending on the different positions of the products, the terms of spatial relative positions may be intended to include different orientations in addition to the orientations shown in the drawings, and should not be construed as limitations on the claims.

[0028] In addition, the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of this specification should be based on the technical personnel in the relevant technical field. Although this specification has described the present invention in detail with reference to the above embodiments, ordinary technical personnel in the field should understand that the technical personnel in the relevant technical field can still modify or make equivalent substitutions to the present invention, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A crystal internal stress detection device, characterized in that: The invention comprises a light source, a polarizing component, a sample transfer component, a camera component and a camera transfer component which are arranged in sequence. The sample transfer component can drive the sample to move up and down, left and right, swing left and right and / or swing up and down. The camera component is arranged on the camera transfer component and moves closer to or away from the light source under the drive of the camera transfer component.

2. The crystal internal stress detection device according to claim 1, characterized in that: The sample transfer assembly comprises a sample fixing part, a bracket arranged below the sample fixing part, an up-down shifter, a left-right shifter, a left-right swinger and an up-down swinger arranged below the bracket in sequence.

3. The crystal internal stress detection device according to claim 2, characterized in that: A horizontally penetrating sample groove is provided on the upper surface of the fixing portion, and the sample groove is opened along the front-back direction.

4. The crystal internal stress detection device according to claim 1, characterized in that: When the sample transplanting assembly drives the sample to move up and down, the range of the sample's up and down movement is ±6 mm. When the sample transplanting assembly drives the sample to move left and right, the range of the sample's left and right movement is ±6 mm.

5. The crystal internal stress detection device according to claim 1, characterized in that: When the sample transplanting assembly drives the sample to swing left and right, the angle range of the sample's left and right swing is ±5°; when the sample transplanting assembly drives the sample to swing up and down, the angle range of the sample's up and down swing is ±5°.

6. The crystal internal stress detection device according to claim 1, characterized in that: The polarizing component comprises a polarizer close to the light source and a 1 / 4 glass sheet arranged on a side of the polarizer away from the light source.

7. The crystal internal stress detection device according to claim 1, characterized in that: The camera assembly includes a lens, a camera and a polarization characteristic element, and the polarization characteristic element has polarization angles of 0°, 45°, 90° and 135°.

8. The crystal internal stress detection device according to claim 7, characterized in that: The camera assembly also includes an adjustment mechanism, the camera is arranged on the adjustment mechanism, and the adjustment mechanism includes a yaw displacement knob for adjusting the left and right swing angles of the camera in the horizontal direction, a pitch displacement knob for adjusting the pitch angle of the camera in the vertical direction, and a camera locking knob.

9. The crystal internal stress detection device according to claim 1, characterized in that: The light source is an LED surface light source with a central wavelength of 500-650nm.

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