Coherent and tunable optical holography

A holographic and optical technology, applied in the field of optical holography, to achieve the effect of simple production, high practical value and simple processing

Active Publication Date: 2017-08-11
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the existing technology can only image static and single incident polarized light, the present invention provides a coherent and tunable optical hologram that utilizes pola

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  • Coherent and tunable optical holography
  • Coherent and tunable optical holography
  • Coherent and tunable optical holography

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Embodiment Construction

[0026] The present invention is described in more detail below in conjunction with accompanying drawing:

[0027] Depend on figure 1 As shown, a coherent tunable optical holography is composed of a polarization standing wave light source, a metasurface holographic element, and a holographic imaging screen. figure 2 Realize the principle of coherent regulation for polarization standing wave polarization state, image 3 Schematic diagram of the interaction between the polarized standing wave and the metasurface. Determine the metasurface substrate and nanorod materials according to the working wavelength and imaging requirements, design the number of nanorods according to the incident light width and pixel size, and determine the orientation angle of the nanorods according to the phase control of the corresponding pixel points by the nanorods and the required imaging image. The optimal value of the length, width and height of the nanorods is determined according to the imagin...

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Abstract

The invention relates to coherent and tunable optical holography. The coherent and tunable optical holography comprises coherent control of an incident polarization state and optical holography of a metamaterial code, wherein polarization standing wave coherent control is incident to the polarization state of a metasurface to dynamically display holographic images under different polarization states, a polarization standing wave is formed by two incident waves which are propagated in opposite directions and of which the polarization states are orthogonal in an interference way, the polarization state incident to the metamaterial is controlled dependent on phase difference, the metamaterial is a structure comprising a substrate and a nanometer unit layer, phase information of an object is coded by changing space distribution of the nanometer unit, so that a phase holographic diagram of the object is formed. The holographic diagrams displayed when light in different polarization states is incident to the metamaterial are different to obtain polarization identification and reproduction of optical holographic images, and dynamic change of the optical holographic images during gradual changing process of the polarization states of the incident light is achieved.

Description

technical field [0001] The invention belongs to the fields of electromagnetic waves, holographic optics and electromagnetic metamaterials, and in particular relates to a coherent tunable optical hologram. Background technique [0002] Optical holography technology uses the principle of light interference and diffraction to record the specific light waves reflected by objects in the form of interference fringes, and then read the light wave information through certain technical conditions to form a three-dimensional image. The application of optical holography technology is quite extensive, including holographic interferometry, holographic storage, holographic optical devices, holographic microscopy, display holography, computational holography and so on. In the early holographic elements, because there were only two simple phase adjustment functions of 0 and π, it was difficult to improve the image signal-to-noise ratio, which caused great pressure on subsequent filtering an...

Claims

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Application Information

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IPC IPC(8): G03H1/04G02B1/00
CPCG02B1/002G03H1/04G03H1/0465
Inventor 朱正江中蛟王玉李玉祥关春颖史金辉
Owner HARBIN ENG UNIV
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