Multi-frequency synchronization phase laser ranging device and method based on dual-acousto-optic shift frequency

A technology of acousto-optic frequency shifting and synchronizing phase, applied in the field of laser measurement, it can solve the problem of lack of multiple measuring rulers, and achieve the effect of eliminating drift and jitter and improving stability.

Active Publication Date: 2012-01-04
HARBIN INST OF TECH
View PDF3 Cites 56 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem of the lack of a device and method that can take into account the synchronization and stability of multiple measuring scale

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-frequency synchronization phase laser ranging device and method based on dual-acousto-optic shift frequency
  • Multi-frequency synchronization phase laser ranging device and method based on dual-acousto-optic shift frequency
  • Multi-frequency synchronization phase laser ranging device and method based on dual-acousto-optic shift frequency

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0024] Specific implementation mode one: combine figure 1 , figure 2 , image 3 and Figure 4 Description of this embodiment, based on dual acousto-optic frequency shifting multi-frequency synchronous phase laser ranging device, it consists of dual longitudinal mode frequency stabilized He-Ne laser 1, multi-scale generation unit 2, beam expanding collimator mirror group 3, measuring The optical path and circuit unit 4 and the control box unit 5 are composed. The laser output from the dual longitudinal mode frequency-stabilized He-Ne laser 1 is output to the input end of the multi-scale generating unit 2, and the laser output from the multi-scale generating unit 2 passes through the beam expander The straight mirror group 3 is connected to the input end of the measurement optical path and the circuit unit 4, and the phase information output end of the measurement optical path and the circuit unit 4 is connected to the phase information input end of the control box unit 5, a...

specific Embodiment approach 2

[0028] Embodiment 2: Different from Embodiment 1, the crystal oscillator 35 of this embodiment adopts a temperature-compensated crystal oscillator, and the short-term frequency stability is better than 0.01 ppm. Other components and connections are the same as Embodiment 1.

specific Embodiment approach 3

[0029] Specific implementation mode three: combination figure 1 , figure 2 , image 3 and Figure 4 To illustrate this embodiment, the multi-frequency synchronous phase laser ranging device based on dual acousto-optic frequency shifting described in the first embodiment is used to realize the multi-frequency synchronous phase laser ranging method based on dual acousto-optic frequency shifting. It includes the following specific steps:

[0030] Step 1. Turn on the dual-longitudinal-mode frequency-stabilized He-Ne laser 1. After preheating and frequency stabilization, the dual-longitudinal-mode frequency-stabilized laser 1 outputs dual-frequency lasers with frequencies f and f′ respectively. The dual-frequency laser passes through The No. 1 beam splitter 6 is divided into two beams, one of which is emitted to the No. 1 acousto-optic frequency shifter 9, and the other beam is divided into two beams of laser beams whose polarization directions are perpendicular to each other thr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a multi-frequency synchronization phase laser ranging device and a method based on dual-acousto-optic shift frequency, relates to the technical field of laser ranging, and mainly relates to a phase laser ranging technology, solving the problem that a device and a method which can achieve both of the synchronism and stability of multiple measuring tapes are in lack in the existing phase laser ranging technology. The multi-frequency synchronization phase laser ranging device based on dual-acousto-optic shift frequency comprises a dual-longitudinal-mode stable frequency He-Ne laser, a multi-measuring-tape generating unit, a bundle expanding and collimating lens set, a light path and circuit measuring unit and a control box unit. The multi-frequency synchronization phase laser ranging method based on dual-acousto-optic comprises the following concrete steps: step one, switching on the dual-longitudinal-mode stable frequency He-Ne laser; step two, taking one beam oflaser as a reference laser beam, and taking the other beam of laser as a measurement laser; step three, taking (f'+f2)-(f+f1) as the accurate measurement tape frequency, and taking a low-frequency electric signal f1-f2 as the rough measurement tape frequency; and step four, moving a measuring cone prism to the target end. The device and the method are used for phase laser ranging.

Description

technical field [0001] The invention belongs to the technical field of laser measurement, and mainly relates to a phase laser ranging technology. Background technique [0002] Large-scale measurement has attracted much attention in the development of large-scale precision machinery manufacturing, major scientific and technological projects, aerospace industry, shipbuilding industry and microelectronic equipment industry and other large-scale optical-mechanical-electrical integration equipment processing and manufacturing. It is an important basis for the processing and overall assembly of medium and large parts of aerospace vehicles and giant ships. The superiority of its measurement methods and equipment performance directly affects the quality of workpieces and assembly accuracy, which in turn affects the operating quality, performance and life of the entire set of equipment. The multi-ruler phase ranging method uses a group of measuring ruler wavelengths from large to sma...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01B11/02
Inventor 谭久彬杨宏兴胡鹏程
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap