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Thin laser beam regulation and control device

A laser beam and control device technology, applied in optics, optical components, instruments, etc., can solve the problem that the detection working distance of the system is difficult to increase

Active Publication Date: 2022-02-25
武汉喻湖光电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The present invention provides a thin laser receiving device, which solves the problem that when the thickness of the laser module is constrained, it is difficult to further increase the existing optical aperture to achieve larger aperture laser reception or emission, which makes it difficult to detect the working distance of the system. Raised technical issues

Method used

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  • Thin laser beam regulation and control device

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Embodiment 1: receiving type thin laser beam control device

[0053] like Image 6 The schematic diagram of the grating structure in the receiving type thin laser beam control device is shown. Element 1 is the first grating device, which can be a transmissive grating device or a reflective grating device; element 2 is the second grating device, which is a reflective grating device; 3 is a beam adjusting device. The incident light beam passes through the first grating device 1 and the second grating device 2 to realize large-scale size reduction, and then passes through the beam adjustment device 3 to realize focused imaging. Through this design, it is possible to receive or emit laser energy with a large aperture under the constraints of a very thin thickness. The beam aperture / thickness ratio can usually be 2-5 times, which can be significantly improved compared with the existing technology. In systems such as Lidar, it is necessary to receive the returning laser si...

Embodiment 2

[0054] Embodiment 2: Emissive thin laser beam control device

[0055] like Figure 8 Shown is an emitting thin laser beam regulating device, which specifically relates to a thin planar light beam regulating device structured light emitting device. The comparative reference structured light diffractive optical element (DOE) transmission device for Apple mobile phones is as shown above, which uses a folded collimator lens optical path. In this embodiment, 1 is the first grating device, which can be a transmissive grating device or a reflective grating device, preferably a transmissive Bragg volume holographic grating device; 2 is a second grating device, which is a mirror-type grating device, preferably Reflective Bragg volume holographic grating or reflective blazed grating; 3 is a beam adjustment device, such as a focusing lens or mirror group; 7 is an array light source, such as a VCSEL array light source, an LED array light source, etc., and 5 is a planar beam adjustment de...

Embodiment 3

[0056] Embodiment 3: LD beam shaping thin laser beam control device

[0057] Due to resonant cavity properties, the divergence angle of a semiconductor laser (LD) source differs in two orthogonal directions, often referred to as the fast axis and the slow axis. If it is desired to output a circular spot through this laser light source, it is usually necessary to construct a beam shaping system with different optical powers (focal lengths) in two directions, such as a combination of fast and slow axis collimating lenses, a combination of aspheric mirror and cylindrical lens, etc., which will make the system significantly increased in length. The patent of the present invention utilizes the characteristics that the beam compression ratios of the two dimensions are respectively controllable. After the LD laser light source passes through the spherical collimation lens to realize the collimated beam, it is regulated by two grating devices with different grating period constants, s...

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Abstract

The invention provides a thin laser beam regulation and control device, which comprises a first grating device, a second grating device, a beam regulation device and a detector. The first grating device and the second grating device are arranged at the positions where grid lines are perpendicular to each other in the direction of a laser incident light path, the first grating device is used for receiving laser, and outputting the first diffraction laser to the second grating device, the second grating device outputs the second diffraction laser to the light beam adjusting device, and the light beam adjusting device adjusts the light beam so as to match and input the light beam to the detector. According to the thin type laser beam regulation and control device, the design of a thin type module with the caliber / thickness ratio larger than 2 is achieved.

Description

technical field [0001] The invention relates to a thin laser beam regulating device, which belongs to the fields of laser beam receiving regulating devices and laser beam emitting regulating devices. Background technique [0002] Laser-based optoelectronic imaging and detection systems are increasingly used in consumer electronics. With the increasing demand for longer-distance application scenarios, it becomes more important to be able to transmit or receive large-caliber lasers on smart terminal devices. There is a technical constraint challenge here. That is, long-distance detection requires a larger optical aperture, while smart terminal devices (typically such as mobile phones) have higher requirements for the thickness of the transmitting and receiving module (that is, the dimension perpendicular to the aperture direction). Therefore, how to achieve larger-diameter laser emission and reception under the constraint of maintaining a certain thickness has become a techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09
CPCG02B27/0944
Inventor 吴鹏谭军杨勋谢辉
Owner 武汉喻湖光电技术有限公司