摘要
提出了计算机制全息与光学全息相结合制作彩色全息图的彩色彩虹全息术。通过计算机对彩色图像进行自动分色,制作红、绿、蓝3幅主计算全息图H1,以H1的再现像为对象,用激光制作彩色彩虹全息图H2,用白光再现获得彩色再现像。该方法把计算机制全息与传统的光学全息相结合,发挥了计算全息与光学全息的优势。在全息图的计算中采用了快速傅里叶变换,加快了计算速度。给出了理论分析和实验结果。
A color holography that combines computer-generated hologram(CGH)and optical hologram is proposed.Firstly,the colorful image is separated into monochromatic images of red,green and blue automatically by computer.Then,three master holograms(H1)corresponding to red,green and blue information are calculated using computer generated hologram.and the respective diffraction distances between the three monochromatic images and the three computer-generated master holograms are designed accurately by computer.Finally,by combining computer-generated holography with optical holography,a color rainbow hologram(H2)is recorded.By re-illuminating H2 with extended white light,a colorful reconstructed image is acquired.This method utilizes the respective advantage of CGH and optical hologram,and fast-Fourier-transform is introduced to speed up the calculation of CGH,spatial frequency and sampling period of hologram are discussed in ordr to lower the computational complexity.The final colorful reconstructed image resulted from this technology is vivid.
出处
《光电子．激光》
EI
CSCD
北大核心
2009年第1期74-77,共4页
Journal of Optoelectronics·Laser
基金
厦门市科技计划指导性资助项目(3502Z20077009)
关键词
计算全息
彩色
彩虹全息
再现像
computer-generated hologram
color
rainbow hologram
reconstructed imag
