制作和重现像面彩色全息图的新方法

A new method of making and reconstructing image color hologram

本文提出像面彩色全息图的制作白光重现的新方法。根据Kogelnik关于体积全息图的耦合波理论,记录时,根据角度灵敏度的要求,把三基色参考光束分别按照不同角度入射到全息干板上。用这种方法记录的彩色全息图,当用与三基色参考光束的空间频率相同的三基色普通光束照射时,将重现消除了串色干扰的原物体的三维彩色像。利用三个全息光栅从白光中选择出三个再现基色波段,并对像面彩色全息图色散补偿,这种白光重现方法没有色模糊。

This paper proposes the new method of making image color hologram and reconstructing this kind of color hologram with white-light. According to Kogelnik's coupled theory of thick hologram, the angular sensitivity of the volume phase hologram is very high, while its wavelength sensitivity is rather low. Making use of this,three primary color reference beams can project on the holographic plate along different orientations respectively in accordance with the requirement of the angular sensitivities. When the hologram taken by this method is illuminated by the three primary color general light beams whose spacial frequencies are equal to the three primary color reference beams respectively, the three-dimensional true color holographic image of the original object will be reconstructed with the cross-talk removed. Using three holographic gratings to select the three primary wave bands from white-light for reconstruction and compensating for the dispersion of the color hologram, this kind of white-light reconstruction method can obtain three-dimensional color image without color blur.