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
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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).
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