Acousto-optic deflector with phase-controlled transducer array

An acousto-optic deflector and transducer array technology, applied in the field of laser scanning, can solve the problems of high system complexity, poor effect, large tracking error, etc., and achieve the effects of reducing device cost, increasing length, and enhancing practicability

Inactive Publication Date: 2012-07-11
HUAZHONG UNIV OF SCI & TECH
View PDF6 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in "Generalized phased array Bragg interaction in anisotropic crystals", Eddie H. Young at el, Optical Technology for Microwave Applications V, 1991 pointed out that when using the first-level tracking method to track the Bragg angle near the extreme point, the tracking error is large , the effect is not as good as the case of fast mode incidence
[0010] An

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
  • Acousto-optic deflector with phase-controlled transducer array
  • Acousto-optic deflector with phase-controlled transducer array
  • Acousto-optic deflector with phase-controlled transducer array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] figure 1 It is a schematic diagram of the structure of the phase-controlled transducer array acousto-optic deflector. In the figure, 1 is the acousto-optic crystal, 2 is the direction of incident light, and 3 is the normal line of the transducer plane. In this example, tellurium dioxide is selected as the acousto-optic material because of its small sound velocity and large acousto-optic figure of merit, which makes it easy to realize a large dynamic scanning angle. Ultrasound is a slow shear wave, and the direction of propagation is basically along the [110] crystal direction of tellurium dioxide, forming an angle with [110] Called the transducer off-axis angle, the incident light forms a small angle θ with the [001] directioni . 4 is a piezoelectric transducer array, the piezoelectric transducer array is welded on the surface of the acousto-optic crystal, 5 ...

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 particularly relates to an acousto-optic deflector with a phase-controlled transducer array. A plurality of transducer electrodes are arranged on a piezoelectric layer on the surface of acousto-optic crystals, and are driven by an independent radio frequency (RF) signal source; the phase difference between RF signals is adjustable; and the acousto-optic deflector works in an abnormal Bragg diffraction mode and can increase the bandwidth by adopting slow-mode incident light and tangent conditions. The range of the tracking angle desired for ultrasonic tracking can be reduced by adopting the tangent conditions of abnormal Bragg diffraction, thereby further increasing length of a single transducer electrode, improving acousto-optic interaction length, or reducing the number of desired transducer electrodes, and reducing system complexity. The acousto-optic deflector can be widely used in the application fields of microscopic imaging, laser display and record system, laser processing, laser measurement and control, and so on.

Description

technical field [0001] The invention belongs to the technical field of laser scanning, and in particular relates to an acousto-optic deflector with a phase-controlled transducer array. Background technique [0002] The acousto-optic deflector is a diffraction device that deflects the light beam by using the acousto-optic coupling effect. Its principle is to generate ultrasonic waves by the ultrasonic piezoelectric transducer bonded on the surface of the acousto-optic material. A volume grating is formed in it to deflect the beam. Its addressing speed reaches the order of microseconds, and its application is mainly limited by its small scanning range, while the scanning range of the acousto-optic deflector is determined by formula (1) [0003] Δθ = λΔf v - - - ( 1 ) [0004] Among them, λ is the wavelength of light in vacuum, Δf is t...

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): G02F1/33
Inventor 骆清铭吕晓华周镇乔曾绍群
Owner HUAZHONG UNIV OF SCI & 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