Optical collimation system of vehicle-mounted laser radar
A vehicle-mounted lidar and optical collimation technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of high processing cost and difficult aspheric lens processing, and achieve the effect of solving processing difficulty and cost problems
Pending Publication Date: 2022-04-05
NINGBO YONGXIN OPTICS +1
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Problems solved by technology
However, the use of aspheric lenses is difficult to process and the processing cost is high
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[0024] like Figure 1~Figure 3 As shown, in this embodiment: it is composed of a semiconductor laser light source LD, a fast axis collimation system 010 and a slow axis collimation system 020. The fast axis collimation system 010 is composed of two front cylindrical lenses - the first cylindrical lens 011 and the second cylindrical lens 012, the slow axis collimation system 020 is composed of a rear cylindrical lens - the third cylindrical lens 021, and The generatrix direction of the first rod lens 011 and the second rod lens 012 is perpendicular to the fast axis direction of the semiconductor laser light source LD, and the generatrix direction of the first rod lens 011 and the second rod lens 012 is mutually perpendicular to the generatrix direction of the third rod lens 021. vertical.
[0025] In consideration of cost and each cylindrical lens is a spherical glass cylindrical lens, no aspheric lens is used, which does not mean that an aspheric glass lens cannot be used.
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The invention discloses an optical collimation system of a vehicle-mounted laser radar, which is composed of a fast axis collimation system and a slow axis collimation system from a semiconductor laser light source to a target object, the fast axis collimation system is composed of two front group cylindrical lenses, and the slow axis collimation system is composed of a rear group cylindrical lens. The generatrix direction of the front group of cylindrical lenses is perpendicular to the fast axis direction of the semiconductor laser light source, the generatrix direction of the front group of cylindrical lenses is perpendicular to the generatrix direction of the rear group of cylindrical lenses, and the slow axis focal length fy of the optical collimation system is larger than or equal to 16mm and smaller than or equal to 20mm; the fast axis focal length fx satisfies 4mm < = fx < = 5mm; the paraxial working F # meets the following conditions: F #: 1.6, and the total optical length TTLlt; the collimating lens has the advantages that the cylindrical lenses are adopted, and the generatrix direction of each cylindrical lens is specifically set, so that the processing difficulty and cost are reduced, and the collimating performance is improved.
Description
technical field [0001] The invention relates to an optical collimation system, in particular to an optical collimation system of a vehicle laser radar. Background technique [0002] Lidar is the abbreviation of Light detection and ranging (LIDAR), which is an active optical measurement device that uses pulsed laser or continuous laser as the light source. With the continuous development of information technology, optoelectronic technology and semiconductor technology, the functions and performance of laser radar are becoming more and more powerful, forming a radar system with relatively novel performance, realizing the integration of light, machinery and electricity, and becoming a modern advanced optical technology. Remote Sensing Technology. Lidar is generally composed of a transmitting system, a receiving system, and an information processing system. Among them, the transmitting system is used to transmit laser signals to the target, the receiving system is used to rece...
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Inventor 张丽芝乔大勇段帆琳庞志远
Owner NINGBO YONGXIN OPTICS