Dual-wavelength pulse laser distance measuring device and method utilizing single laser and single channel
A pulsed laser ranging and laser technology, used in measurement devices, radio wave measurement systems, instruments, etc., can solve problems such as harsh operating conditions, expensive equipment, and complex measurement devices, and achieve low system equipment requirements and working environment. Low-demand, wide-ranging effects
Active Publication Date: 2015-04-15
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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[0002] The traditional method uses dual-wavelength lasers for ranging and is mostly used for artificial satellite laser ranging. The distance value and correction value are obtained through the round-trip time of the two wavelengths on the distance to be measured and the difference between the two. No atmospheric correction is required. Reaching millimeter-level high ranging accuracy, this dual-wavelength laser ranging has high requirements for the laser system, timing equipment, and photodetectors of the rangefinder. Generally, a multi-channel transmitting or receiving system is used, and the measuring device is complex and the operating conditions Strict requirements, expensive equipment, technical difficulties
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[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0023] refer to figure 1 As shown, the present invention provides a dual-wavelength pulsed laser ranging device utilizing a single laser and a single channel, the device comprising:
[0024] a laser 1 for providing a first laser beam with a first wavelength;
[0025] a beam splitter 2 for splitting the first laser beam into two parts;
[0026] a first mirror 3 which reflects one of the two parts of said first laser beam;
[0027] A frequency doubling component 5, which is used to form one of the two parts of the first laser beam into a second laser beam whose frequency is N times the frequency of the first laser beam, and N is an integer between 2-6;
[0028] Filter 9, which is used to filter out the first laser beam a...
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The invention provides a dual-wavelength pulse laser distance measuring device and method utilizing a single laser and a single channel. The device comprises the layer, a beam splitter, a frequency multiplication component, an optical delay component, a beam combiner and a detector. The laser is used for providing a first laser beam with a first wavelength. The beam splitter is used for dividing the first laser beam into a first part of the first laser beam and a second part of the first laser beam. The frequency multiplication component is used for using the first part of the first laser beam to form a second laser beam with a second wavelength. The optical delay component is used for delaying the second part of the first laser beam. The beam combiner is used for combining the second part of the first laser beam and the second laser beam into the same light path and transmitting the second part of the first laser beam and the second laser beam in the same light path to a target. The detector is used for detecting energy generated after the second part of the first laser beam and the second laser beam are reflected by the object so as to measure the distance of the target. By the device, different operation wavelengths can be chosen flexibility according to different detectors and operation conditions.
Description
technical field [0001] The invention relates to the technical field of laser ranging, in particular to a dual-wavelength pulsed laser ranging device and method realized by using a single laser and a single channel. Background technique [0002] The traditional method uses dual-wavelength lasers for ranging and is mostly used for artificial satellite laser ranging. The distance value and correction value are obtained through the round-trip time of the two wavelengths on the distance to be measured and the difference between the two. No atmospheric correction is required. Reaching millimeter-level high ranging accuracy, this dual-wavelength laser ranging has high requirements for the laser system, timing equipment, and photodetectors of the rangefinder. Generally, a multi-channel transmitting or receiving system is used, and the measuring device is complex and the operating conditions The requirements are harsh, the equipment is expensive, and the technology is difficult. Co...
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IPC IPC(8): G01S17/10
Inventor 林学春杨盈莹赵伟芳王文婷伊肖静张玲于海娟
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI