Incoherent triangular digital holographic color three-dimensional imaging system and method

Abstract

The invention relates to an incoherent triangular digital holography colorful three-dimensional imaging system and method. The incoherent triangular digital holography colorful three-dimensional imaging system comprises a white light source, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a first interference filter, a second interference filter, a third interference filter, a first polarizing film, a second polarizing film, a polarization splitting prism, a first reflector, a second reflector, an image collection device and a computer. The incoherent triangular digital holography colorful three-dimensional imaging system is characterized in that a Fourier transform lens is added based on a traditional triangular interferometer, the normal direction of the first reflector deviates off the optical axis of the system, and incoherent off-axis Fourier transform hologram record is achieved. By means of the method, red, green and blue quasi monochromatic light generated by performing narrow-band filtering on the white light source through the three interference filters serves as the lighting source, and three holograms are generated and recorded; the three holograms are reproduced in the computer, and registration is performed on the reproductive images; the reproductive images of three-color channels are fused to form a true color image. By means of the incoherent triangular digital holography colorful three-dimensional imaging system and method, colorful holographic reproductive images of incoherent objects can be obtained quickly, and three-dimensional colorful imaging of the incoherent objects can be achieved.

Description

Technical field [0001] The invention belongs to the technical field of digital holography and three-dimensional imaging, and relates to a system and method for realizing incoherent color three-dimensional imaging based on incoherent digital holography technology. Background technique [0002] Holography has the characteristics of three-dimensional imaging of objects and has received extensive attention since its invention. However, the dependence on coherent light sources largely limits the specific application of traditional holography in many fields. The emergence of incoherent holography makes holography get rid of the dependence on coherent light sources, and expands its application fields to astronomical observation, biological fluorescence and other incoherent optical imaging fields. Using the point-derived coherence characteristics of the incoherent light source, the light waves emitted by the object are split by different methods, and the three-dimensional information of...

AI Technical Summary

Problems solved by technology

However, this method records coaxial Fresnel holograms, which requires the introduction of multiple exposure phase shift technology to eliminate the influence of twin images, and more complex numerical calculations for holograms. The recording process and reproduction speed of the system are relatively slow. , it is difficult to realize real-time or quasi-real-time three-dimensional display of dynamic samples

In addition, since the lateral position of the Fresnel hologram reconstructed image is closely related to the recording distance of the hologram and the angle between the reference light and the object light during recording, three monochrome reconstructed images in Fresnel color holography It is difficult to accurately register the lateral position of the horizontal position, resulting in blurred borders of the final color reproduction image and reducing the quality of the color reproduction image

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