Built-in hyperspectral camera for smartphone in visible, near-infrared and middle-infrared lights region (first report): trial products of beans-size Fourier-spectroscopic line-imager and feasibility experimental results of middle-infrared spectroscopic i
Built-in hyperspectral camera for smartphone in visible, near-infrared and middle-infrared lights region (first report): trial products of beans-size Fourier-spectroscopic line-imager and feasibility experimental results of middle-infrared spectroscopic i
复制标题
智能手机内置可见光、近红外、中红外光区高光谱摄像头（第一篇报告）：豆子大小的傅立叶光谱线成像仪试制产品及中红外光谱成像仪可行性实验结果
DOI：
10.1117/12.2223353
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Ichiro Ishimaru
中科院分区：
文献类型：
--
作者：
Natsumi Kawashima;Ichiro Ishimaru
我们已经提出并报道了一种小手指大小的高光谱相机，它可以应用于可见光和红外光。预计该方法将应用于用于医疗传感器的智能手机和用于反恐或环境监测的无人机等无人驾驶飞行器上。在本报告中，我们将提到拇指大小仪器的试用产品，其透镜直径为5[mm]。所提出的傅里叶光谱成像仪是一种波前分频共程移相干涉仪。将相对倾斜移相器安装在无限远校正光学系统的傅里叶变换平面上。无限远校正光学系统配置了一个物镜和一个圆柱形成像透镜。相对倾斜移相器由厚度小于0.3 mm的薄玻璃制成，由于薄玻璃的一半表面以1度左右的斜角抛光，因此具有楔形棱镜和长方体玻璃区域。物镜表面单亮点产生的准直半通量分别穿透楔形棱镜和长方体玻璃。这两束光束相互干扰，形成空间条纹图样的干涉图。在这种情况下，二维光接收装置上的水平轴被指定为相移量。纵轴也被分配给线视图域上的成像坐标。因此，通过在光学傅里叶变换平面上安装薄移相器，可以实现获得一维光谱特征分布的线光谱成像仪。
We had already proposed and reported the little-finger size hyperspectral-camera that was able to be applied to visible and infrared lights. The proposed method has been expected to be mounted on smartphones for healthcare sensors, and unmanned air vehicles such as drones for antiterrorism measures or environmental measurements. In this report, we will mention the trial product of the thumb size apparatus whose lens diameter was 5[mm]. The proposed Fourier spectroscopic imager is a kind of wavefront-division and common-path phase-shift interferometers. We installed the relative inclined phase-shifter onto optical Fourier transform plane of infinity corrected optical systems. The infinity corrected optical systems was configured with an objective lens and a cylindrical imaging lens. The relative inclined phase-shifter, what was made from a thin glass less than 0.3[mm] thick, had the wedge-prism and cuboid-glass region, because half surface of a thin glass was polished at an oblique angle of around 1[deg.]. The collimated half flux of objective beams derived from single-bright points on objective surface penetrate through the wedge prism and the cuboid glass respectively. These two beams are interfered each other and form the infererogram as spatial fringe patterns. In this case, the horizontal axis on 2-dimensional light receiving device is assigned to the amount of phase-shift. And also the vertical axis is assigned to the imaging coordinates on a line view field. Thus, by installing thin phase-shifter onto optical Fourier transform plane, the line spectroscopic imager, what obtains 1 dimensional spectral character distributions, were able to be realized.