公开(公告)号：US11581695B2

公开(公告)日：2023-02-14

申请号：US17022343

申请日：2020-09-16

Applicant: Harbin Institute of Technology

Inventor： Hongxing Yang ,  Yun Zou ,  Ziqi Yin ,  Jing Li ,  Pengcheng Hu ,  Jiubin Tan

IPC: H01S3/131 ,  G01K1/02 ,  H01S3/13 ,  H05B1/02 ,  G02B27/28

Abstract: The disclosure provides a high-frequency-reproducibility laser frequency stabilization method and device based on multi-point acquisition of laser tube temperature. The laser frequency stabilization device includes: a frequency stabilization control circuit. The frequency stabilization control circuit includes a polarizing beam splitter, an optical power conversion circuit, an A/D conversion circuit, a temperature measuring circuit, a microprocessor, a D/A converter and a heating film driver. The polarizing beam splitter is disposed outside any one of laser transmitting holes. The optical power conversion circuit is disposed on reflection and refraction optical paths of the polarizing beam splitter. The optical power conversion circuit, the A/D conversion circuit, the microprocessor, the D/A converter, the heating film driver and a plurality of groups of heating films are sequentially in one-way connection. Temperature sensors, the temperature measuring circuit and the microprocessor are sequentially in one-way connection.

公开(公告)号：US12055391B2

公开(公告)日：2024-08-06

申请号：US17706343

申请日：2022-03-28

Applicant: Harbin Institute of Technology

Inventor： Hongxing Yang ,  Ziqi Yin ,  Pengcheng Hu ,  Jiubin Tan

IPC: G01B9/02001 ,  G02B5/30 ,  G02B27/28 ,  G02F1/11

CPC classification number: G01B9/02007 ,  G01B9/02011 ,  G02B5/3083 ,  G02B27/283 ,  G02F1/11

Abstract: The present disclosure provides a multi-frequency hybrid heterodyne laser tracker system based on a single light source. According to the laser tracking system proposed in the present disclosure, multi-frequency laser is obtained by conducting multi-acousto-optic frequency shift on a dual-longitudinal-mode laser unit, and an absolute ranging precision gauge is constructed by using a dual-longitudinal-mode interval of a light source. With the frequency shift difference of a multi-acousto-optic frequency shifter, an absolute ranging roughness gauge is constructed, and the relative displacement measurement of dual-frequency light interference is achieved. Meanwhile, by utilizing the reflection of multiple reflectors and light splitting and combining of polarization prisms, synchronous measurement of multi-wavelength absolute distance, relative displacement and PSD position is achieved, resolving the problem that an existing laser tracker uses multiple light sources, which leads to difference in measurement datum, and consequently to the difficultly in traceback.