A Beam Scanning System Based on Volume Bragg Grating
A volume Bragg grating and beam scanning technology, which is applied in the field of beam scanning systems based on volume Bragg gratings, can solve the problems of low moment of inertia, high efficiency and large scanning angle range, and achieve the effect of improving the scope of application and high overall efficiency
Active Publication Date: 2021-07-20
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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Problems solved by technology
However, the existing beam scanning system is difficult to take into account the advantages of low moment of inertia, high efficiency, polarization independence and large scanning angle range.
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[0027] A beam scanning system based on a volume Bragg grating, such as figure 1 As shown, it includes a first turntable, a first volume Bragg grating 1 , a second turntable, a second volume Bragg grating 2 and a turntable connector 5 .
[0028] Specifically, in this embodiment, the first volume Bragg grating 1 and the first rotating stage are set at an angle α. Due to the characteristics of the volume Bragg grating, when the incident angle of the incident light is on the periphery of the Bragg incident angle, the volume Bragg grating can be Bragg grating diffraction. Therefore, in order to make the incident light always satisfy the Bragg condition of the first volume Bragg grating 1 when the first rotary table rotates, the diffracted light beam of the first volume Bragg grating 1 can scan out a pyramidal surface around the rotation axis of the first rotary table, The value range of the included angle α is set to [α1-Δα, α1+Δα]; where α1 represents the Bragg incident angle of ...
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The invention discloses a beam scanning system based on a volume Bragg grating, which includes a first rotating table, a first volume Bragg grating, a second rotating table, a second volume Bragg grating and a connector of the rotating table; the first volume Bragg grating and the second volume Bragg grating The first rotary table is set at an included angle α; the second volume Bragg grating and the second rotary table are set at an included angle β; the first rotary table and the second rotary table are set at an included angle γ; the first rotary table and the second rotary table pass through The turntable connector is connected; when the first turntable is driven by its own driving device to rotate, the second turntable follows the rotation of the first turntable, while the second turntable also rotates under its own drive device. The object of the present invention is to provide a beam scanning system based on a rotating Bragg grating, which can realize beam scanning with low moment of inertia, high efficiency, polarization-independent, and large angle range.
Description
technical field [0001] The invention relates to the technical field of beam control, in particular to a beam scanning system based on a volume Bragg grating. Background technique [0002] Realize the flexible control of the beam direction, and have broad application prospects in the fields of laser communication, laser radar, projection display, virtual reality and other space optics and information optics. However, the existing beam scanning systems are difficult to take into account the advantages of low moment of inertia, high efficiency, polarization independence, and large scanning angle range. Contents of the invention [0003] The object of the present invention is to provide a beam scanning system and using method based on volume Bragg gratings. Through two volume Bragg gratings, the incident beam can be scanned with low moment of inertia, high efficiency, polarization-independent, and large angle range. It greatly simplifies the optical path of the system, reduce...
Claims
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IPC IPC(8): G02B26/10
CPCG02B26/106
Inventor 段佳著赵祥杰沈志学李大鹏胡奇琪彭英楠沈浩王德田乔冉曾建成
Owner INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS