Vasefi Fartash, Kaminska Bozena, Chapman Glenn H, Carson Jeffrey J L
The School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada.
Opt Express. 2008 Dec 22;16(26):21492-504. doi: 10.1364/oe.16.021492.
Imaging structures within a turbid medium using Angular Domain Imaging (ADI) employs an angular filter array to separate weakly scattered photons from those that are highly scattered. At high scattering coefficients, ADI contrast declines due to the large fraction of non-uniform background scattered light still within the acceptance angle. This paper demonstrates various methods to enhance the image contrast in ADI. Experiments where a wedge prism was used to deviate the laser source so that scattered photons could be imaged and subtracted from the image obtained by standard ADI provided the greatest improvement in image contrast.
使用角域成像（ADI）对浑浊介质中的结构进行成像时，采用角滤波器阵列将弱散射光子与强散射光子分离。在高散射系数下，由于仍在接受角范围内的非均匀背景散射光占比很大，ADI对比度会下降。本文展示了多种增强ADI图像对比度的方法。使用楔形棱镜使激光源发生偏折，从而对散射光子进行成像并从标准ADI获得的图像中减去散射光子的实验，在图像对比度方面取得了最大的改善。
