The spectral combination characteristic of grating and the bi-grating diffraction imaging effect  

作　　者：ZHANG WeiPing HE XiaoRong 

机构地区：[1]College of Physics Science and Technology,Guangxi University,Nanning 530004,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2007年第1期1-5,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 10364001);the Natural Science Foundation of Guangxi Province (Grant No. 0043001)

摘　　要：This paper reports on a new property of grating, namely spectral combination, and on bi-grating diffraction imaging that is based on spectral combination. The spectral combination characteristic of a grating is the capability of combining multiple light beams of different wavelengths incident from specific angles into a single beam. The bi-grating diffraction imaging is the formation of the image of an object with two gratings: the first grating disperses the multi-color light beams from the object and the second combines the dispersed light beams to form the image. We gave the conditions necessary for obtaining the spectral combination. We also presented the equations that relate the two gratings’ spatial frequencies, diffraction orders and positions necessary for obtaining the bi-grating diffraction imaging.This paper reports on a new property of grating, namely spectral combination, and on bi-grating diffraction imaging that is based on spectral combination. The spectral combination characteristic of a grating is the capability of combining multiple light beams of different wavelengths incident from specific angles into a single beam. The bi-grating diffraction imaging is the formation of the image of an object with two gratings: the first grating disperses the multi-color light beams from the object and the second combines the dispersed light beams to form the image. We gave the conditions necessary for obtaining the spectral combination. We also presented the equations that relate the two gratings’ spatial frequencies, diffraction orders and positions necessary for obtaining the bi-grating diffraction imaging.

关 键 词：SPECTRAL COMBINATION bi-grating IMAGING DIFFRACTION IMAGING 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]