Holographic lens 4f optical system based on holographic optical element
A holographic optical element and holographic lens technology, which is applied in the field of holographic lens, 4f optical system, and holographic optical element recording technology, can solve the problems of high processing cost, unfavorable head-mounted AR holographic 3D display lightweight and integration, and heavy weight, etc. question
Inactive Publication Date: 2019-09-03
成都华屏科技有限公司 +1
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Problems solved by technology
Traditional 4f optical systems generally use convex lenses made of glass, which has high processing costs and heavy weight, which is not conducive to the lightweight and integration of head-mounted AR holographic 3D displays
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[0012] A typical embodiment of the holographic lens 4f optical system based on the holographic optical element of the present invention will be described in detail below to further describe the present invention in detail. It is necessary to point out that the following examples are only used for further description of the present invention, and cannot be interpreted as limiting the protection scope of the present invention, and those skilled in the art make some non-essential improvements to the present invention according to the above-mentioned content of the present invention And adjustments still belong to the protection scope of the present invention.
[0013] The holographic lens 4f optical system based on the holographic optical element proposed by the present invention is mainly composed of a holographic lens 1 and a holographic lens 2 with a Fourier lens function, by placing a suitable filter between the holographic lens 1 and the holographic lens 2 The input plane wa...
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The invention discloses a holographic lens 4f optical system based on a holographic optical element. The holographic lens 4f optical system mainly comprises a holographic lens 1 with a Fourier lens function and a holographic lens 2 with a Fourier lens function, an appropriate filter is arranged between the holographic lens 1 and the holographic lens 2 to perform spatial filtering on an input planewave signal. In the system, an input plane wave obliquely irradiates the holographic lens 1 at an included angle [theta], a space spectrum of the input plane wave is obtained at the focal plane of the holographic lens 1 after Fourier transform of the holographic lens 1, a proper filter is placed at the focal plane of the holographic lens 1 to filter the space spectrum of the input plane wave forfiltering processing, the filtered space spectrum is subjected to inverse Fourier transform of the holographic lens 2 to obtain a required plane wave and obliquely outputs the plane wave at the included angle [theta], so that the space filtering function of the system is achieved.
Description
technical field [0001] The invention relates to a holographic optical element recording technology, a holographic lens and a 4f optical system, in particular to a holographic lens 4f optical system based on a holographic optical element. Background technique [0002] With the rapid development of computer technology and electro-optic modulation devices, computational holographic 3D displays have also made great breakthroughs. Especially in recent years, more and more studies have been conducted on computational holographic holographic 3D displays in head-mounted augmented reality (AR). Computational holography is based on the principle of dry reflection of light, using a computer to draw a hologram of an object, and then using a spatial light modulator to load the hologram, and based on the principle of light diffraction to achieve holographic 3D reproduction. The gray value of the hologram can cause each corresponding pixel unit on the spatial light modulator to generate di...
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IPC IPC(8): G03H1/02G03H1/04G03H1/16
CPCG03H1/02G03H1/04G03H1/16G03H2001/045
Inventor 王琼华何岷阳邓欢张汉乐王勇
Owner 成都华屏科技有限公司