基于液晶显示器的无透镜单像素成像研究

根据获取物体傅里叶频谱实现单像素成像的理论，提出了通过对液晶显示器(LCD)加载一系列灰度条纹图像，并利用置于屏幕前的单点光电探测器接收物体透射光强，来实现无透镜单像素成像的方法。该系统降低了对硬件的要求，光路紧凑，灵活性强。从理论上证明了LCD加载图像时图像灰度与透射光强之间存在的非线性关系对系统成像没有影响，从实验上验证了该方法的可行性。该系统的成像实验表明，加载条纹后需预留给显示器液晶分子一定的响应时间,使探测器准确获取光强，可显著减小背景噪声和共轭像干扰，提高重建图像质量。

Lensless single pixel imaging based on LCD

Based on the single pixel imaging theory realized by acquisiting Fourier spectra,a single-pixel lensless imaging method is proposed by loading a series of gray stripes on a liquid crystal display (LCD) screen and placing a single pixel photoelectric detector in front of it to receive the light projected by an object.The imaging system reduces the requirements for hardware,has compact optical path and strong flexibility.It is verified theoretically that the nonlinearity between the gray scale of the image loaded on LCD and the intensity of transmitted light has no influence on reconstructed images.The effectiveness of the imaging method is confirmed experimentally.Experimental results show that after loading the stripe,it's needed to set aside certain response time,so that the detector is able to obtain accurate light intensity.Background noise and interference of conjugate image are significantly reduced and the reconstructed image quality is improved.