Optical display system and method for expanding holographic display eye box and field angle

A holographic display and optical display technology, which is applied in the direction of optics, optical components, and light guides of lighting systems, can solve the problems of limiting the size of the eye box and the size of the field of view, restricting the development of holographic display technology, and small range, etc. Box and field of view, expanded holographic display eye box and field of view, range enhancement effect

Pending Publication Date: 2022-05-13
SOUTHEAST UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the reconstruction of the hologram needs to pass through the relay optical system to filter or scale the light wave output by the image generation unit, but the diaphragm, lens and other optical devices introduced by the relay optical system limit the size of the eye box and the viewing angle of the hologram reconstruction. The size of the field angle leads to a too small range for the human eye to observe the hologram reconstruction results, which restricts the development of holographic display technology

Method used

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  • Optical display system and method for expanding holographic display eye box and field angle
  • Optical display system and method for expanding holographic display eye box and field angle
  • Optical display system and method for expanding holographic display eye box and field angle

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Embodiment 1

[0084] Embodiment 1: Utilize computer calculation, adopt bi-phase encoding algorithm to reconstruct the hologram corresponding to the result, and load it on the phase-type spatial light modulator Holoeye Pluto produced by Holoeye Company of Germany through the computer, this phase-type spatial light modulation The specification of the sensor is 1920×1080 pixels, and the pixel pitch is 8 μm. The light source is monochromatic green light with a wavelength of 532nm emitted by a monochromatic laser. The light emitted by the spatial light modulator passes through the dichroic prism, and then passes through a filter system composed of a lens and a diaphragm, as shown in Figure 2, f 1 =10cm, the aperture size is 1mm×1mm. The preset imaging distance l=1cm, so the distance between the center of the first lens and the spatial light modulator is set to be 10cm, and the distance between the waveguide and the diaphragm is set to be 1cm. In this embodiment, a planar waveguide is used. The...

Embodiment 2

[0086] Embodiment 2: Utilize computer calculation, adopt bi-phase encoding algorithm to reconstruct the hologram corresponding to the result, and load it on the phase-type spatial light modulator Holoeye Pluto produced by Germany Holoeye Company through the computer, this phase-type spatial light modulation The specification of the sensor is 1920×1080 pixels, and the pixel pitch is 8 μm. The light source is monochromatic green light with a wavelength of 532nm emitted by a monochromatic laser. The light emitted by the spatial light modulator passes through the dichroic prism, and then passes through a filter system composed of a lens and a diaphragm, as shown in Figure 2, f 1 =10cm, the aperture size is 1mm×1mm. The preset imaging distance l=1cm, so the distance between the center of the first lens and the spatial light modulator is set to be 10cm, and the distance between the waveguide and the diaphragm is set to be 1cm. In this embodiment, a planar waveguide is used. The si...

Embodiment 3

[0088]Embodiment 3: Utilize computer calculation, adopt bi-phase encoding algorithm to reconstruct the hologram corresponding to the result, and load it on the phase-type spatial light modulator Holoeye Pluto produced by Holoeye Company of Germany through the computer, this phase-type spatial light modulation The specification of the sensor is 1920×1080 pixels, and the pixel pitch is 8 μm. The light source is monochromatic green light with a wavelength of 532nm emitted by a monochromatic laser. The light emitted by the spatial light modulator passes through the dichroic prism, and then passes through a filter system composed of a lens and a diaphragm, as shown in Figure 2, f 1 =10cm, the aperture size is 1mm×1mm. The preset imaging distance l=1cm, so the distance between the center of the first lens and the spatial light modulator is set to be 10cm, and the distance between the waveguide and the diaphragm is set to be 1cm. In this embodiment, a planar waveguide is used. The ...

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Abstract

The invention relates to an optical display system and method for expanding a holographic display eye box and a field angle, and the system is characterized in that a holographic image generated by a hologram generation unit for coherent light is subjected to image filtering and zooming through a beam splitter prism and a relay optical system; the holographic image is reflected and diffracted for multiple times in propagation through the waveguide structure; the method comprises the following steps of: loading a hologram corresponding to a calculation and reconstruction result to a hologram generation unit, setting a coherent light source or an incoherent light source with a preset wavelength, and spreading the coherent light source or the incoherent light source through a relay optical system corresponding to a selected hologram calculation method; and coupling the propagated light wave into a waveguide system, and observing a hologram result of which the eye box and the field angle are expanded at the coupled-out part. According to the invention, the eye box and the field angle of the hologram reconstruction result are effectively improved, the observable range of the hologram reconstruction result is expanded, and the quality and experience of observing the hologram in a free space are improved.

Description

technical field [0001] The invention relates to a method for displaying a hologram, in particular to an optical display system and method for enlarging a holographic display eye box and viewing angle. Background technique [0002] Holographic display technology is a technology that can reconstruct the complex amplitude light field of a three-dimensional scene, and is therefore considered to be the most ideal next-generation stereoscopic display technology. With the continuous development of computer technology and liquid crystal display technology, as long as a three-dimensional scene can be described mathematically, we can get rid of the complicated interference recording process in traditional holography, without using the recording dry plate of the high-coherence light source system, and instead Holograms are numerically computed in a computer to reconstruct real or post-synthesized scenes. [0003] Since the reconstruction of the hologram needs to pass through the relay...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G02B27/00G02B27/10G03H1/00G03H1/08G02B6/00
CPCG02B27/0081G03H1/0005G03H1/08G02B6/0016G02B6/0026G02B6/005G02B27/10G03H2001/0088
Inventor王翘楚刘姝夏军
OwnerSOUTHEAST UNIV