公开(公告)号：US20110102565A1

公开(公告)日：2011-05-05

申请号：US12441420

申请日：2007-09-28

Applicant: Xinghua Wang ,  Patrick Treado ,  Charles W. Gardner ,  David Tuschell ,  Jingyun Zhang

Inventor： Xinghua Wang ,  Patrick Treado ,  Charles W. Gardner ,  David Tuschell ,  Jingyun Zhang

IPC: H04N7/18

CPC classification number: G01J3/44 ,  G01J3/02 ,  G01J3/0218 ,  G01J3/10 ,  G01J3/32 ,  G01J3/36 ,  G01J3/447

Abstract: Macroscopic and microscopic samples are imaged through a spectral filter operable into the short wave infrared, e.g., to approximately 3200 nm. The sample is illuminated for reflective, transmissive, fluorescent and/or Raman imaging by a laser or metal-halide arc beam. The filter has tunable birefringent retarders distributed rotationally and stacked in stages leading up to a selection polarizer. Image forming optics and CCD cameras collect the luminance of each pixel in the spatially resolved image, at multiple wavelengths to which the filter is tuned successively. The filter stages have comb shaped transmission characteristics. Two filter stages with distinctly different characteristics can be cascaded, one or both being tunable. The combined transmission characteristic has narrow passbands where the bandpass peaks of the stages coincide and wide free spectral range where the peaks do not coincide. Embodiments are disclosed for forensic analysis, material composition and morphology, chemical compound identification and detection of biological species.

Abstract translation: 宏观和微观样品通过可操作成短波红外光谱的光谱滤光片成像，例如达到约3200nm。 通过激光或金属卤化物弧光束对样品进行反射，透射，荧光和/或拉曼成像。 滤光器具有可调谐的双折射延迟器，其分级旋转并且分级地分层导向选择偏振器。 图像形成光学器件和CCD照相机在多个波长下收集空间分辨图像中每个像素的亮度，其中滤波器依次被调谐到这些波长。 过滤器级具有梳状传动特性。 可以级联具有明显不同特性的两个过滤器级，一个或两个可调谐。 组合传输特性具有窄通带，其中级的带通峰重合，峰的自由光谱范围不一致。 公开了用于法医分析，材料组成和形态，化学化合物鉴定和生物物种检测的实施例。