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Optical lens of dual-channel composite wavelength near infrared laser radar transmitting system

A compound wavelength and infrared laser technology, applied in the field of optical lenses, achieves compactness and low cost, and improves convenience

Inactive Publication Date: 2015-04-22
TONGJI UNIV
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Problems solved by technology

The optical lens of the dual-channel, composite working wavelength near-infrared laser radar emission system proposed by the present invention has not yet been reported to realize the output of parallel beams of different calibers

Method used

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  • Optical lens of dual-channel composite wavelength near infrared laser radar transmitting system
  • Optical lens of dual-channel composite wavelength near infrared laser radar transmitting system
  • Optical lens of dual-channel composite wavelength near infrared laser radar transmitting system

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] figure 1 and figure 2 Shown is a schematic diagram of the best embodiment of the optical lens of a dual-channel composite wavelength infrared laser radar transmitting system. The working wavelengths of the first optical channel are 0.860μm and 1.064μm, respectively, and the focal power is 0. According to the characteristics of the laser, the full field of view is 0.1°. A total of 6 lenses are used, including 4 lenses in the shared pre-beam expander system and Two aspherical reflectors in the secondary reflective beam expander group achieve 83 times beam expansion and output 250mm parallel beams; the primary beam expander system uses a combination of two materials, BK7 and F2, to realize the achromatic design. The working wavelengths of the second optical channel are 0.860μm and 1.064μm respectively, and the focal power is 0. Eight lenses are u...

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Abstract

The invention relates to an optical lens of a dual-channel composite wavelength near infrared laser radar transmitting system. Two optical channels share a laser light source and a preceding stage beam expanding system, the two channels output parallel beams different in aperture, time-sharing work is conducted through switching by a conversion lens, the requirements for compactness and low cost are met, and modular design is achieved. According to the shared preceding stage beam expanding system, two optical materials are used for achromatism design, and the requirement for a composite operating wavelength is met. Due to change of the output wavelength of the laser light source, the transmitting system can achieve the multiple working modes that the composite operating wavelength is achieved and the double transmitting channels output the parallel light beams different in aperture. The optical axes of the two optical channels are parallel, so after testing equipment and a target to be measured are adjusted, the target to be measured can be measured in different wave bands in different testing modes only by adjusting the operating wavelength of the transmitting system and moving the switching lens, and measuring convenient is remarkably improved. In consideration of the engineering application aspect, the mode that the large-aperture refraction and reflection channel is fixed and a reflection switching mechanism is added to the small-aperture channel is adopted for the optical lens so as to ensure the switching resetting precision of the transmitting system.

Description

technical field [0001] The invention relates to an optical lens, in particular to an optical lens for a dual-channel composite wavelength infrared laser radar emission system. Background technique [0002] The laser scattering characteristic of the target is one of the most important optical characteristics, and it is the basis for the laser measurement system to detect and identify the target. The laser scattering characteristic of the target determines the main technical parameters and even the choice of the working system of the laser measurement system. Lidar Scattering Cross Section (LRCS) can fully reflect the influence of various factors such as laser wavelength, polarization, directional scattering characteristics and roughness of target surface materials, and target geometric shape on the target laser scattering characteristics. Carry out target laser scattering characteristics measurement, obtain corresponding data, and count the target laser scattering cross secti...

Claims

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Application Information

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IPC IPC(8): G01S7/481G02B27/10
CPCG01S7/4814G02B27/10
Inventor 王占山沈正祥童广德程鑫彬焦宏飞张锦龙
Owner TONGJI UNIV
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