四通道可见光光谱相机的设计

冯姗; 曾祥忠

doi:doi:10.5768/jao201940.0301006

应用光学, 2019, 40 (3): 393, 网络出版: 2019-06-10

四通道可见光光谱相机的设计

Design of four-channel visible-spectral camera

论文大纲

冯姗曾祥忠

作者单位

西安邮电大学电子工程学院，陕西西安 710121

多光谱相机小型化光路设计同步采集 multi-spectral camera miniaturization optical path design synchronous acquisition

摘要

随着光谱技术的发展，多光谱相机在农业、医疗、机器视觉、遥感探测等领域都得到了广泛的应用。提出一款小型化四通道可见光波段的多光谱相机，尺寸为107 mm×110 mm×74 mm，质量1 043 g，适合搭载在小型化无人机上进行遥感探测。相机系统采用棱镜分光光路设计方案，避免光程差和光轴偏移；设计开发的四通道可见光多光谱相机，采用一个FPGA控制器同时驱动4个图像传感器，实现4个通道像素级同步采集，曝光完全一致。实验结果显示：在红、绿、蓝3个特定波段及全波段相机可实时输出图像，既可输出某个特定波段图像(60 fps)，也可同时输出4个波段图像（15 fps），有利于多波段图像同步采集，以及多光谱图像融合的研究。

Abstract

With the development of spectroscopy technology, multi-spectral cameras have been widely used in agriculture, medical, machine vision, remote sensing and other fields. This paper proposes a miniaturized four-channel visible-waveband multi-spectral camera with a size of 107 mm×110 mm×74 mm and a mass of 1 043 g, which is especially suitable for remote sensing detection on a miniaturized drone. The camera system adopts a prism beam splitting optical path design scheme to avoid optical path difference and optical axis shift. The specially designed four-channel multi-spectral camera in visible light uses an field-programmable gate array (FPGA) controller to simultaneously drive 4 image sensors to realize four-channel pixel-level synchronous acquisition, and the exposure is exactly the same.The test results show that at the 3 specific bands of red, green and blue and the full band,the camera can output images in real time, which can output a specific band image (60 fps) or 4 band images (15 fps) at the same time,which is beneficial to the synchronous acquisition of multi-band images and the research on multi-spectral images fusion.

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冯姗, 曾祥忠. 四通道可见光光谱相机的设计[J]. 应用光学, 2019, 40(3): 393. FENG Shan, ZENG Xiangzhong. Design of four-channel visible-spectral camera[J]. Journal of Applied Optics, 2019, 40(3): 393.

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