Wide-field spectroscopic imaging of biological-substance distributions on entire faces by measuring middle infrared lights emitted from human bodies itself
Wide-field spectroscopic imaging of biological-substance distributions on entire faces by measuring middle infrared lights emitted from human bodies itself
复制标题
通过测量人体本身发出的中红外光，对整个面部的生物物质分布进行宽视场光谱成像
DOI：
10.1117/12.2038837
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
I. Ishimaru
中科院分区：
文献类型：
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作者：
Yo Suzuki;W. Qi;Masaru Fujiwara;Hiroyuki Hiramatsu;Satoru Suzuki;P. Abeygunawardhana;Kenji Wada;A. Nishiyama;I. Ishimaru
我们的目标是在日常生活环境中实现生物物质分布（如皮脂）在整个面部的测量技术。我们提出了成像型二维傅立叶光谱[1]，这是一种掌上大小的便携式测量仪器，对机械振动具有很强的鲁棒性。该方法可以在没有光源的情况下测量人体自身发出的辐射光的宽视场二维中红外光谱成像。在该方法中，我们在无限远校正光学系统的光学傅里叶变换平面上安装移相器，它可以使物束的半通量产生任意相位差。可以实现近共程干涉仪，即物镜光束间的相移干涉仪。在该方法中，测量表面上每个单亮点发射的射线会相互干扰。因此，即使来自人体的中红外光是空间非相干光，我们也可以在成像阵列设备上根据二维图像强度变化的相移量获得每个像素处的干涉图。我们论证了在没有主动照明的情况下进行全人脸中红外光谱成像的可行性。
We are aiming at the realization of the measurement technology for the biological-substance distributions, such as sebum, on entire faces at the daily-life environment. We proposed the imaging-type 2-dimensional Fourier spectroscopy [1] that is the palmtop-size portable measurement apparatus and has the strong robustness for mechanical vibrations. And the proposed method can measure the wide-field 2-dimensional middle-infrared spectroscopic-imaging of radiation lights emitted from human bodies itself without light sources. In the proposed method, we install the phase-shifter, that can give an arbitrary phase difference for the half-flux of objective beams, at the optical Fourier transform plane of the infinity corrected optical system. The near-common-path interferometer that is a phase-shift interferometer between objective beams can be realized. In this proposed method, the emitted rays from each single-bright-point on measurement surfaces can interfere with each other. Thus, even if the middle infrared-lights from human bodies are the spatially incoherent light, we can acquire the interferograms at each pixel on an imaging array-device in accordance with the amount of phase shift as the 2-dimensional image-intensity changes. We demonstrated the feasibility of the middle infrared spectroscopic imaging of whole human faces without active illuminations.