Research On Printing Method Of High-Resolution Image Plane Hologram

Holographic technology has unique advantages in the field of threedimensional display.It can realize the true three-dimensional display of light waves of objects.It is a new carrier that integrates high-tech,visual art and practical value in human information society.Optical holography achieves complex amplitude information storage and three-dimensional reconstruction of object light waves by recording interference stripes of object and reference light waves on optical materials.Computed holography uses a computer to process the wave-front information of an object to generate a hologram.It can be reconstructed using optical devices such as a spatial light modulator or by simulating the imaging process in a computer,eliminating many optical steps and recording information about any object.However,the experimental operation of optical holography is cumbersome and can only record objects that exist in the real world.Computational holography is subject to the technical process and light control performance of a spatial light modulator,and it is not possible to achieve high-quality optical reconstruction of object light waves in white light.Concerning the current holographic display system with limited resolution,small display size and viewing angle,the specific research contents of this paper are as follows:1)A method for printing large-size and high-resolution image plane holograms with combined control of optical hologram and computed hologram is presented.A single-step Fourier algorithm based on Fresnel Diffraction is used to calculate the complex amplitude distribution of the target object light wave,and a high-resolution hologram is drawn by using biphasic encoding.The image is partially loaded with the spatial light modulator,and then a reference light interference record is introduced.After processing the reconstructed digital content of the spatial light modulator,the image plane hologram is generated.An 8K resolution,8cm×10cm optical reconstructed image of the target object can be observed in white light.2)A method for calculating field-of-view angle elevation of image plane holograms with direct hologram abbreviation is presented.The hologram of the target object is computed by chromatography,the highresolution hologram image of the object is loaded by a spatial light modulator,and is microprinted to the hologram dry plate by an optical system.When the combination of lenses with focal lenses of 80 mm and 250 mm is used for microprinting,the pixel spacing is reduced from 8μm to 2.56μm.Finally,the image plane hologram is printed by using the hologram dry plate image,and the field of view angle of the image plane hologram is increased by 10°.