Compact holographic near-eye AR display system and its application
A display system, compact technology, applied in the direction of optical components, instruments, optics, etc., can solve the problem of complex optical path of holographic display
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Embodiment 1
[0061] This embodiment is a holographic near-eye AR display system using an optical isolation device, and its structure is as follows figure 1 As shown in (a), the display system consists of a fiber laser 11 , a composite functional holographic optical element 13 , a polarizer 15 , a quarter wave plate 16 , a lens 17 , a spatial light modulator 18 and a computer 19 .
[0062] Its optical path is described as follows:
[0063] Such as figure 1 As shown in (a), the fiber laser 11 emits divergent spherical waves 12 to illuminate the compound functional holographic optical element 13, and the convergent spherical wave 14 is diffracted from the compound functional holographic optical element 13, and placed at the converging point of the converging spherical wave 14 A polarizer 15 is placed next to a quarter-wave plate. After the converging spherical wave 14 passes through the converging point, it becomes a diverging spherical wave. A lens 17 is placed behind the converging spheric...
Embodiment 2
[0070] This embodiment is improved on the basis of Embodiment 1. Such as figure 2 As shown, the display system includes a fiber laser 21 , a composite functional holographic optical element 23 , a filter 25 , a lens 26 , a spatial light modulator 27 and a computer 28 .
[0071] Its optical path is similar to embodiment 1, described as follows:
[0072] Such as figure 2 As shown in (a), the divergent spherical wave 22 emitted by the fiber laser 21 obliquely illuminates the composite functional holographic optical element 23, and the convergent spherical wave 24 is diffracted from the composite functional holographic optical element 23, and a filter is placed near the converging point. The converging spherical wave 24 is not blocked, allowing it to enter the subsequent system. The distance between the converging point of the lens 26 and the converging spherical wave 24 is the focal length of the lens 26. The diverging spherical wave passing through the converging point is m...
Embodiment 3
[0077] This example is a near-eye AR holographic color display system based on a filtering device.
[0078] Such as image 3 As shown, the display system includes a blue laser 31, a green laser 32, a red laser 33, an acousto-optic switch 34, 35, 36 located in the small light beams emitted by the three lasers, a mirror 37, a half mirror 38, 39. Coupling lens 310, composite function holographic optical element 312, filter 313, lens 314, spatial filter 315 and computer 316.
[0079] Such as Figure 4 As shown in (a), the light emitted by the lasers 31 , 32 , 33 is reflected by the mirror 37 , reflected by the half-mirrors 38 , 39 and combined, and then enters an optical fiber through the coupling lens 310 . The spherical wave 311 emitted from the fiber hair illuminates the composite functional holographic optical element 312. At this time, the composite functional holographic optical element 312 is formed by stacking three composite functional holographic optical elements recor...
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