CN-121989179-A - Fixing clamp of four-quadrant APD component automatic test system

CN121989179ACN 121989179 ACN121989179 ACN 121989179ACN-121989179-A

Abstract

The invention belongs to the technical field of photoelectric detectors, and particularly discloses a fixing clamp of an automatic testing system for a four-quadrant APD (avalanche photo diode) component, which comprises a testing seat and a testing cover, wherein a tested piece is arranged in a central cavity of the testing seat, the testing cover is arranged on the testing seat and is provided with an outer rotating ring and an inner rotating ring, rotating handles are arranged on the outer rotating ring and the inner rotating ring, the testing cover is internally provided with an installing seat, an optical fiber jumper wire stretches into the installing seat during testing and is fixed on the installing seat through an FC (fiber reinforced plastic) flange plate, the installing seat is pushed to press the tested piece downwards during rotation of the outer rotating ring, an eccentric hole is formed in the inner rotating ring, and the optical fiber jumper wire is driven to eccentrically rotate during rotation of the inner rotating ring so as to complete quadrant switching. The fixing clamp adopts the precise mechanical alignment and fixing unit, overcomes the problem of light path drift caused by temperature circulation through a rigid structure, and ensures the stability of the light spot position in the whole test process, thereby obtaining high-repeatability test data and improving the accuracy and reliability of a test system.

Inventors

BAI MIN
DENG DAWEI
QIN PENGFEI
QIU KAIQIANG
CHEN YONG
LI SENMAO

Assignees

重庆鹰谷光电股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260408

Claims (4)

1. The utility model provides a mounting fixture of automatic test system of four-quadrant APD subassembly, its characterized in that, mounting fixture includes test seat and test lid, is installed in the central cavity of test seat by the measured piece, the test lid is installed on the test seat to be provided with outer rotating ring and rotating ring on the test lid, be provided with the twist grip on outer rotating ring and the rotating ring, be provided with the mount pad in the test lid, during the test optical fiber jumper wire stretches into in the mount pad, and fix on the mount pad through the FC ring flange, promote the mount pad when outer rotating ring rotates to push down and compress tightly the measured piece, be provided with eccentric hole on the rotating ring, drive optical fiber jumper wire when rotating and eccentrically rotate and accomplish the quadrant and switch.
2. The fixing clamp of the four-quadrant APD assembly automatic test system according to claim 1, wherein clamping blocks are arranged on two sides of the test cover, the clamping blocks are rotatably arranged on the test cover through rotating shafts, reset springs are arranged on the inner sides of the clamping blocks, after a tested piece is installed, the test cover and the test seat are aligned, then the clamping blocks on two sides are pressed by hands, the reset springs are extruded on the upper ends of the clamping blocks on two sides, the lower ends of the clamping blocks are opened, the clamping blocks are loosened again, and the lower ends of the clamping blocks on two sides are buckled on the test seat under the action of the reset springs.
3. The fixing clamp of the four-quadrant APD assembly automatic test system according to claim 1, further comprising a threaded ring, wherein the mounting seat is in a stepped shaft shape, the threaded ring is sleeved outside the mounting seat, the upper end of the threaded ring is fixedly connected with the outer rotating ring, the threaded ring is driven to synchronously rotate when the outer rotating ring is rotated, a spring hole is formed in the outer portion of the mounting seat, a pressing spring is arranged in the spring hole, and the pressing spring is pressed downwards when the threaded ring rotates, so that the step at the bottom of the mounting seat is pushed to move downwards, and a tested piece is pressed.
4. The fixture of claim 1, wherein the outer rotating ring has a limit groove at its bottom, and the top of the test cover has a limit post, the limit post acting in the limit groove and limiting when the outer rotating ring rotates.

Description

Fixing clamp of four-quadrant APD component automatic test system Technical Field The invention belongs to the technical field of photoelectric detectors, and particularly relates to a fixing clamp of a four-quadrant APD component automatic test system. Background The four-quadrant APD component is a photoelectric detector with high sensitivity and high response speed, and is widely applied to the fields of laser guidance, photoelectric tracking, free space optical communication and the like. The performance parameters, such as dark noise, responsivity, quadrant crosstalk, etc., can vary significantly with ambient temperature. Therefore, in the links of product development, production and quality inspection, comprehensive performance test must be performed within the working temperature range. At present, the following problems exist in the test of the APD four-quadrant component: The traditional light path alignment mode (such as manual adjustment) has poor repeatability, the light path is easy to deviate due to the thermal expansion and contraction effect in the temperature cycle process, the test result is unreliable, and the manual alignment is very unstable in the actual operation. Therefore, a fixing clamp of an automatic test system for an APD four-quadrant component, which can realize accurate alignment of an optical path, is urgently needed. Disclosure of Invention Accordingly, the present invention is directed to a fixture for an automatic test system for four-quadrant APD assemblies, which can realize precise alignment of light beams, prevent optical paths from being shifted, and improve accuracy and reliability of the test system. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides a mounting fixture of automatic test system of four-quadrant APD subassembly, includes test seat and test lid, is installed in the central cavity of test seat by the piece, the test lid is installed on the test seat to be provided with outer rotating ring and rotating ring on the test lid, be provided with the twist grip on outer rotating ring and the rotating ring, be provided with the mount pad in the test lid, during the test optical fiber jumper wire stretches into in the mount pad, and fix on the mount pad through the FC ring flange, promote the mount pad to push down when outer rotating ring rotates and compress tightly the piece that is measured, be provided with the eccentric hole on the rotating ring, drive optical fiber jumper wire when rotating and carry out eccentric rotation and accomplish the quadrant and switch. Further, the both sides of test lid are provided with the grip block, the grip block rotates the setting through the axis of rotation and covers, and the inboard of grip block is provided with reset spring, is surveyed the piece installation back, with test lid and test seat alignment, then presses both sides grip block with the hand, and reset spring is extruded to the upper end of both sides grip block, and the lower extreme opens, loosens the grip block again, and both sides grip block is under reset spring's effect, lower extreme lock on the test seat. The device comprises a mounting seat, an outer rotating ring, a mounting seat, a spring hole, a pressing spring and a pressing device, wherein the mounting seat is in a stepped shaft shape, the threaded ring is sleeved outside the mounting seat, the upper end of the threaded ring is fixedly connected with the outer rotating ring, the threaded ring is driven to synchronously rotate when the outer rotating ring is rotated, the spring hole is arranged outside the mounting seat, the pressing spring is pressed downwards when the threaded ring rotates, and the step at the bottom of the mounting seat is pushed to move downwards, so that a measured piece is pressed tightly. Further, the outer rotating ring bottom is provided with the spacing groove, the test lid top is provided with spacing post, spacing post effect is in the spacing groove, plays spacing effect when outer rotating ring rotates. Compared with the prior art, the invention has the following remarkable advantages: The fixing clamp adopts the precise mechanical alignment and fixing unit, overcomes the problem of light path drift caused by temperature circulation through a rigid structure, and ensures the stability of the light spot position in the whole test process, thereby obtaining high-repeatability test data and improving the accuracy and reliability of a test system. Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the spe