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A large aperture crystal defect detection method and device

A technology of crystal defect and detection device, which is applied in the direction of material excitation analysis, etc., to achieve the effects of high control accuracy, low manufacturing cost and simple structure

Active Publication Date: 2015-10-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a large-diameter crystal defect detection method and device to solve the problem that there is no method and device for detecting crystal growth defects by using the frequency doubling efficiency measurement method in a constant temperature state so far

Method used

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  • A large aperture crystal defect detection method and device
  • A large aperture crystal defect detection method and device
  • A large aperture crystal defect detection method and device

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specific Embodiment approach 1

[0019] Specific implementation mode one: combine figure 1 and Figure 4 To illustrate, a large-aperture crystal defect detection method in this embodiment, the method includes the following steps:

[0020] Step 1. First, the crystal 2 is loaded into the large-diameter crystal defect detection device 26, and then the large-diameter crystal defect detection device 26 is set in the detection optical path, and the temperature of the temperature controller 15 in the large-diameter crystal defect detection device 26 is controlled. value, so that crystal 2 is heated or cooled with a temperature gradient of ±0.1°C, and the frequency doubling efficiency values ​​of crystal 2 at different temperatures are obtained, and the temperature value of crystal 2 under the condition of the highest frequency doubling conversion efficiency is obtained by Gaussian fitting method , which is the best matching temperature, the temperature value of the temperature controller 15 is set as the best match...

specific Embodiment approach 2

[0024] Specific implementation mode two: combination Figure 1-Figure 3 Explanation, the implementation of this embodiment is a large-diameter crystal defect detection device adopted in the method of the first embodiment, and the large-diameter crystal defect detection device 26 includes a heater 1, a casing 7, a copper ring 10, a temperature control system, two An inner retaining ring 12, two window glass sheets 3, two inner fixed end caps 13 and two outer fixed end caps 6, the temperature control system includes a temperature measuring thermocouple 14 and a temperature controller 15;

[0025] One of the two opposite end faces of each inner retaining ring 12 is a straight end face 20, and the other end face is an oblique end face 21. The outer circumferential surface of the copper ring 10 is fixed with a heater 1, and the two inner retaining rings 12 The straight end faces 20 are oppositely arranged and fitted inside the copper ring 10, the two inner retaining rings 12 are ra...

specific Embodiment approach 3

[0027] Specific implementation mode three: combination figure 1 and figure 2 Explain that the outer walls of the two inner retaining rings 12 in this embodiment are respectively provided with a keyway 23, and the two keyways 23 are arranged on the same straight line (to ensure that the window glass sheet 3 is placed in parallel), and the inner wall of the copper ring 10 is along the length There is a through groove 24 in the direction, the through groove 24 corresponds to the two key grooves 23, each corresponding key groove 23 and the through groove 24 are equipped with a key 11, and the two inner retaining rings 12 each pass through a key 11 and the copper ring 10 The connection is detachable in the radial direction, and the outer sidewalls of the two inner retaining rings 12 are in close contact with the inner sidewalls of the copper ring 10 . The connection is stable and convenient, and at the same time it is easy to install. The undisclosed technical features in this em...

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Abstract

The invention discloses a large-diameter crystal defect detection method and a large-diameter crystal defect detection device, solving the problem that at present, no method and device for detecting the growth defects of a crystal by using a frequency multiplication efficiency measurement method in a constant temperature state are available for the crystal. The large-diameter crystal defect detection device with the crystal is arranged inside a defect detection light path of the detection device; according to the device, a heater is fixed outside a copper ring; two inner baffle rings are arranged inside the copper ring in a sleeving mannerand are in detachable connection with the copper ring; a vertically arranged large-diameter crystal is fixed between the two baffle rings; inner fixing end covers are fixedly connected with the copper ring; window glass sheets are fixed on inclined end surfaces of the inner baffle rings through the inner fixing end covers; the outer side of the heater is sleeved with a shell; two ends of the shell are fixed with the outer fixing end covers; a temperature thermocouple is fixed on the copper ring; the temperature thermocouple is connected with a display meter of the temperature thermocouple through a lead; the display meter is used for outputting temperature to a temperature controller; the temperature controller is connected with the heater through a lead. The method and the device are applied to large-diameter crystal defect detection.

Description

technical field [0001] The invention relates to a crystal defect detection method and device. Background technique [0002] Frequency doubling conversion technology is an important method to obtain high-energy laser, mainly through the frequency doubling effect of crystals such as KDP, DKDP, ADP, etc. to obtain high-frequency, high-energy laser. The defects in the crystal growth process seriously affect the frequency doubling conversion efficiency. So far, there is no method and device for detecting growth defects in crystals by using the frequency doubling efficiency measurement method in a constant temperature state. Contents of the invention [0003] The object of the present invention is to provide a large-diameter crystal defect detection method and device to solve the problem that until now, there is no method and device for detecting crystal growth defects by using a frequency doubling efficiency measurement method in a constant temperature state. [0004] The met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/63
Inventor 张鹏孙付仲卢礼华梁迎春
Owner HARBIN INST OF TECH
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