Light beam angle quick modulating device based on digital micro-lens device

A digital micromirror device and light beam technology, which is applied in optics, instruments, optical components, etc., can solve the problems of slow modulation speed and achieve high modulation speed, high modulation precision and fast modulation speed

Inactive Publication Date: 2018-05-22
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the modulation speed is limited by the resonance frequency of mechanical parts in the prior art, and to provide a fast modulation device for beam angle based on a digital micromirror device, which can realize high-speed modulation, and It can realize the encoding of the spatial angle of the beam, and output parallel light at multiple angles at the same time

Method used

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  • Light beam angle quick modulating device based on digital micro-lens device
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  • Light beam angle quick modulating device based on digital micro-lens device

Examples

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Embodiment 1

[0029] A fast beam angle modulation device based on a digital micromirror device, comprising: a digital micromirror device 1, a collimator beam expander system 2, a lens array 3, an objective lens module 4 and an aperture 5;

[0030] The lens array 3 is a 6*6 square array composed of 36 single lens units 3-1, such as figure 2 shown;

[0031] A kind of beam angle fast modulation device based on the digital micromirror device proposed by the present invention, such as figure 1 As shown in , the light emitted by the external light source is incident on the digital micromirror device 1, and the aperture of the incident light beam is distributed within the effective target surface range of the digital micromirror device 1; each pixel unit in the digital micromirror device 1 is controlled by a voltage Realize two states of "on" and "off". The spatial angles of the digital micromirror pixel units are different in the two states. The spatial structure of the incident light beam, dig...

Embodiment 2

[0036] A fast beam angle modulation device based on a digital micromirror device, comprising: a digital micromirror device 1, a collimator beam expander system 2, a lens array 3, an objective lens module 4 and an aperture 5;

[0037] The lens array 3 is a hexagonal array of 37 single lens units 3-1, such as Figure 5 shown;

[0038] In this embodiment, by controlling only one area "open" in the digital micromirror device 1, a beam of parallel beam output whose propagation angle corresponds to the "open" area of ​​the digital micromirror device is obtained. The propagation angle of the parallel beam is continuously changed by the digital micromirror device. This is achieved by the location of the "turn-on" region on the mirror device.

[0039] The structure and principle of other parts in this embodiment are the same as those in Embodiment 1.

Embodiment 3

[0041] A fast beam angle modulation device based on a digital micromirror device, comprising: a digital micromirror device 1, a collimator beam expander system 2, a lens array 3, an objective lens module 4 and an aperture 5;

[0042] The lens array 3 is a hexagonal array of 37 single lens units 3-1, such as Figure 5 shown;

[0043] In this embodiment, by controlling the pixel units in 5 regions in the digital micromirror device (1) to be in the "on" state, the light beam output after being modulated by the digital micromirror device (1) is passed through the collimating beam expanding system ( 2) Afterwards, it can be irradiated and covered on the 5 single lens units in the lens array (3), so that the 5 single lens units (3-1) and the objective lens module (4) arranged thereafter can simultaneously output five beams of parallel light, the propagation angle of each beam of parallel light is determined by the spatial position of the corresponding single lens unit (3-1).

[00...

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Abstract

The invention relates to a light beam angle quick modulating device based on a digital micro-lens device, wherein the light beam angle quick modulating device belongs to the designing field of a photoelectric device and a calculating imaging system. The light beam angle quick modulating device comprises the components of the digital micro-lens device which performs spatial position area gating modulation on an incident light beam; a beam expanding system which performs collimating beam expanding on the light beam that is emitted from the micro-lens device; a lens array and an object lens system which realize conversion from light beam spatial area gating modulation to angle two-dimensional modulation through focus superposing; and a diaphragm which realizes spatial shearing to the parallellight beam and acquires parallel light that is propagated in different angles with a specific area dimension. Through the quick spatial modulation characteristic of the digital micro-lens device andthe light field angle information acquisition capability of the lens array, the light beam angle quick modulating device has advantages of realizing a quick adjusting function for the two-dimensionalangle of the spatial light beam, realizing no restriction by the resonant frequency of a mechanical device, and realizing spatial light beam angle modulation and coding.

Description

technical field [0001] The invention relates to a fast beam angle modulation device based on a digital micromirror device, which belongs to the design field of photoelectric instruments and computational imaging systems. Background technique [0002] The light field information contains a wealth of information. Traditional methods such as photography sacrifice the angle information of the light beam in the light field by means of dimensionality reduction and integration to obtain a four-dimensional light field in a two-dimensional sensor (photosensitive film or CCD / CMOS). Such operations Insufficient use of light field information makes it difficult to obtain more object information. The plenoptic function is a more comprehensive way to describe the light field, In addition to the spatial position, the plenoptic function also includes information such as spatial two-dimensional angle and wavelength. The use of these parameters seems to make it possible to obtain more compr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B26/08
CPCG02B26/0833
Inventor 张韶辉郝群陈卓程雪岷胡摇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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