光学技术, 2018, 44 (1): 51, 网络出版: 2018-02-01
基于滤光片阵列分光的无人机载多光谱相机研制
Development of UAV-borne multispectral camera based on narrow bandwidth filter array
摘要
介绍一款适用于轻小型无人机的多光谱相机。将多个独立的滤光片依次拼接成滤光片阵列在成像探测器前放置由多个滤光片依次排列而成的滤光片阵列, 一次曝光得到地物目标分条带区域的分波段图像, 通过飞行平台的前向运动获得每个条带区域的多光谱图像。利用平台的前向运动代替了旋转、扫描等机械运动, 减轻了相机重量和体积, 适用于轻小型无人机平台, 由于采用较大的探测器件, 能够获得更多的旁向像素数(约4300)和更宽的旁向幅宽。利用研制的多光谱相机, 在中国科学院怀来遥感站进行了无人机飞行试验, 获取了站区周边的6波段多光谱图像。数据处理结果表明该相机的数据质量能够满足植被指数计算等相关要求。
Abstract
A multi-spectral camera for small UAV is presented. A filter array arrayed by a plurality of filters in sequence is arranged in front of the imaging detector, and several different narrow band images of the target region is obtained by one exposure. Multispectral images of each stripe region are obtained by the forward motion of the flight platform. Forward movement of the platform instead of rotating, scanning and other mechanical movement is used for reducing the camera weight and size, suitable for small UAV platform. And a larger number of side-by-side pixels (about 4300) and side-by-side widths can be obtained due to the larger detection devices. The flight experiment using the multispectral camera is conducted in Huailai Remote Sensing Station of Chinese Academy of Sciences (CAS), and the 6-band multispectral images are obtained. The data processing results show that the data quality of the camera can meet the requirements of vegetation index calculation and other related requirements.
曹丛峰, 方俊永, 赵冬. 基于滤光片阵列分光的无人机载多光谱相机研制[J]. 光学技术, 2018, 44(1): 51. CAO Congfeng, FANG Junyong, ZHAO Dong. Development of UAV-borne multispectral camera based on narrow bandwidth filter array[J]. Optical Technique, 2018, 44(1): 51.