Chinese Academy of Sciences

Decheng Wu

Dong Liu

Yingjian Wang

Wei Wei

Chenbo Xie

Bangxin Wang

Zhiqing Zhong

Zhenzhu Wang

Aiyuan Fan

Kunming Xing

Xiaojun Zhou

Liyong Qian

Liujun Zhong

Yufei Chu

Zhiqiang Kuang

Wenju Wang

The invention relates to the technical field of radar detection, in particular to a device for real-time detection of spectrum from airborne hyperspectral imaging LiDAR and method thereof. The device comprises a laser and a reference module; the reference module comprises a first reflecting mirror and a second reflecting mirror with a given transmittance; the first reflecting mirror and the second reflecting mirror are arranged with a focusing mirror and an optical fiber in sequence therebetween. The laser emits a laser light to the first reflecting mirror with a given transmittance, and the beam of the laser light transmitted through the first reflecting mirror after passing the focusing mirror is used as the reference beam after passing the optical fiber. The invention enables detection of the spectral line of each pulse and improves the precision of reflection spectrum of the ground object measured by the system.

Device and method for real-time measuring the spectrum of airborne hyperspectral imaging LiDAR

This application relates to a device for measuring a transmittance curve of an Fabry-Perot using a frequency comb light source and a method using the same. The device includes the following components sequentially arranged in an optical path: a single frequency pulse laser generating single frequency pulse laser; a frequency comb laser converting received single frequency pulse laser into frequency comb laser; and an Fabry-Perot to be detected receiving laser output from the frequency comb laser; where the device further includes a first receiving unit receiving laser from an output end of the frequency comb laser and performing component and spectrum analysis, and a second receiving unit receiving laser from an output end of the Fabry-Perot to be detected and performing component and spectrum analysis.

Device for measuring transmittance curve of Fabry-Perot using frequency comb light source and method using the same

The invention relates to the technical field of radar detection, in particular to a method for radiation calibration of airborne hyperspectral imaging LiDAR system. The method comprises the following steps: S1. A monochromator in a spectrum calibration system emits optical signals of different spectrum values to scan the radar system, thus to obtain the bandwidth and central wavelength of each channel in the radar system; S2. According to the return signal power P(λ, z) in the hyperspectral LiDAR equation and the optical power P(λ) received by the target surface of the detector in the radar system under experimental conditions, a white diffuse reflection board is taken as the ground object target, and a ranging channel is used to measure the flying height of the radar system, thus to obtain the parameters in the return signal power P(λ, z) and the reflection spectrum β(λ).

Method for radiation calibration of airborne hyperspectral imaging LiDAR system

Disclosed is a device and a method for measuring Fabry-Parot (FP) transmittance curve by using a whispering gallery mode laser source. The device includes: a seed laser, a first polarizer, a second polarizer, a spectroscope, a beam reduction system, a lens, and Polydimethylsiloxane (PDMS) microfluidic chip arranged in sequence.

Device and method for measuring transmittance curve of Fabry-Parot using whispering gallery mode laser source

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Anhui, China

Decheng Wu