CN112731784A - Static optical scanning tilt holographic system and implementation method - Google Patents

Static optical scanning tilt holographic system and implementation method Download PDF

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CN112731784A
CN112731784A CN202110022851.6A CN202110022851A CN112731784A CN 112731784 A CN112731784 A CN 112731784A CN 202110022851 A CN202110022851 A CN 202110022851A CN 112731784 A CN112731784 A CN 112731784A
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beam splitter
lens
wave
scanning
polarizer
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张亚萍
姚勇伟
许蔚
张竟原
王斌
范厚鑫
陈会心
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Kunming University of Science and Technology
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0443—Digital holography, i.e. recording holograms with digital recording means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/10—Processes or apparatus for producing holograms using modulated reference beam
    • G03H1/12—Spatial modulation, e.g. ghost imaging
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • G03H2001/0208—Individual components other than the hologram
    • G03H2001/0224—Active addressable light modulator, i.e. Spatial Light Modulator [SLM]
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0443—Digital holography, i.e. recording holograms with digital recording means
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Abstract

本发明公开了一种静态光学扫描倾斜全息系统及实现方法，属于光学数字全息成像技术领域，包括激光器，小孔，第一透镜，第一偏振片，分束镜，空间光调制器，第二偏振片，偏振分束镜，四分之一波片、旋转台、物体，第二透镜，光电探测器，计算机；本发明采用空间光调制器代替传统OSH中的二维扫描装置，增加系统的稳定性，且消除了由于二维扫描装置振动所带来的全息图记录过程中的噪声，提高全息图重建质量；其中增加旋转台可实现较大的采样间距来记录离轴物体光信息，达到同等重构全息图质量条件下减少采样时间的效果；本发明整体系统结构简单，数据处理方便快捷，在光学全息显微，三维物体识别，光学遥感、医学成像等领域具有广泛应用前景。

Figure 202110022851

The invention discloses a static optical scanning tilt holographic system and a realization method, belonging to the technical field of optical digital holographic imaging, comprising a laser, a small hole, a first lens, a first polarizer, a beam splitter, a spatial light modulator, a second Polarizing plate, polarizing beam splitter, quarter wave plate, rotating table, object, second lens, photodetector, computer; the present invention uses a spatial light modulator to replace the two-dimensional scanning device in the traditional OSH, and increases the system capacity. It is stable, and eliminates the noise in the hologram recording process caused by the vibration of the two-dimensional scanning device, and improves the quality of hologram reconstruction; the addition of a rotating stage can achieve a larger sampling distance to record the optical information of off-axis objects. The effect of reducing the sampling time under the condition of the same reconstructed hologram quality; the overall system structure of the invention is simple, the data processing is convenient and fast, and has wide application prospects in the fields of optical holographic microscopy, three-dimensional object recognition, optical remote sensing, medical imaging and the like.

Figure 202110022851

Description

Static optical scanning tilt holographic system and implementation method
Technical Field
The invention belongs to the technical field of optical holographic imaging, and particularly belongs to a static optical scanning tilt holographic system and an implementation method thereof.
Background
Optical Scanning Holography (OSH), as a special digital holography technique, can achieve incoherent real-time recording, and holographic information of a three-dimensional object can be obtained by performing one-time two-dimensional optical scanning on an object. OSH can effectively avoid the problems of twin images, zero-order spots and the like in the traditional holography, has the characteristics of good real-time performance, high resolution and the like, and has wide application prospect in the fields of optical holographic microscopy, three-dimensional object recognition, optical remote sensing, medical imaging and the like.
However, the conventional OSH requires an interferometer, a two-dimensional scanning device and a frequency shifter to first obtain a Fresnel Zone Plate (FZP) varying with time and to scan a three-dimensional object thereby, which complicates an optical setup, and the two-dimensional scanning device may increase noise of hologram recording due to the influence of mechanical vibration during scanning. In addition, as more pixel points are to be recorded, the scanning time will be longer.
The document "Coaxial scanning holography" proposes a Coaxial scanning holographic system, which generates a scanning beam pattern through a geometric phase lens without separating an optical path, but a two-dimensional scanning device is reserved, so that some noise is inevitably generated in the hologram recording process, and the imaging quality of object reconstruction is affected.
The document "optical scanning holographic technique without mechanical motion scanning" proposes an improved optical scanning holographic device, which still uses the traditional mach-zehnder interferometer of OSH as the basic architecture, the structure is more complicated, and the scanning time will increase due to the increase of the recorded pixel points.
The document "motion less optical scanning holography" proposes an improved optical scanning holographic system, which utilizes the polarization sensitivity of a spatial light modulator to solve the device complexity problem of the traditional OSH, but still avoids the problem that the scanning time will increase with the increase of the recording pixel points under the same condition.
The literature "Optical Scanning Tilt Holography" proposes a new scheme of Optical Scanning Holography, which can record off-axis object light by using a larger sampling interval, and solves the problem that the Scanning time can increase along with the increase of recording pixel points under the same condition. The device in the scheme still uses the Mach-Zehnder interferometer of the traditional OSH as a basic framework, and keeps the structure of the two-dimensional scanning device to be more complex, so that the noise recorded by the hologram is increased, and the quality of the reconstructed image is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a static optical scanning tilt holography realization method, which solves the defects in the prior art.
In order to realize the purpose, the technical scheme adopted by the invention is as follows:
a static optical scanning tilt holographic system, comprising: the device comprises a laser 1, a small hole 2, a first lens 3, a first polaroid 4, a beam splitter 5, a spatial light modulator 6, a second polaroid 7, a polarization beam splitter 8, a quarter-wave plate 9, a rotating platform 10, an object 11, a second lens 12, a photoelectric detector 13 and a computer 14.
The direction of an optical axis of emergent light of the laser 1 is consistent with the center of the small hole 2, the small hole 2 is arranged between the first lens 3 and the laser 1, and the distance between the small hole 2 and the first lens 3 is the focal length of the first lens 3. The first polaroid 4 and the beam splitter 5 are positioned at two sides of the first lens 3, and the spatial light modulator 6 is vertically arranged in the direction of the transmitted light of the beam splitter 5; the second polaroid 7 is positioned between the beam splitter 5 and the polarization beam splitter 8, the quarter-wave plate 9 is arranged between the polarization beam splitter 8 and the rotating platform 10, the object 11 is arranged on the rotating platform 10, the second lens 12 is positioned on two sides of the polarization beam splitter 8 and the electric detector 13, and the electric detector 13 is connected with the computer 14.
The invention relates to a static optical scanning tilt holography implementation method, which specifically comprises the following steps:
step 1: parallel light emitted by the laser 1 is modulated into divergent spherical waves after passing through the small hole 2, the spherical light beams form plane waves after passing through the first lens 3, and the plane waves can be modulated into diagonal polarization plane waves after passing through the first polarizing film 4.
Step 2: the linearly polarized plane wave irradiates the spatial light modulator 6 after passing through the beam splitter 5, and the spatial light modulator 6 only modulates the polarization state in the horizontal or vertical direction to generate plane wave and spherical wave with orthogonal polarization states. The light beam modulated by the spatial light modulator 6 forms interference fringes through the beam splitter 5 and the second polarizer 7, and the p-wave completely passing through the polarization beam splitter 8 becomes a scanning light beam with circular polarization state to scan the object 10 after passing through the quarter-wave plate 9.
And step 3: the spherical phase distributions are sequentially displayed to the spatial light modulator 6, and each spherical phase distribution has different phases and spatial offset, so that the aim of scanning a three-dimensional object by moving a scanning beam is fulfilled.
And 4, step 4: the turntable 10 is rotated to tilt the scanning beam at a certain angle with respect to the object axis, thereby realizing recording of off-axis object light with a larger sampling interval. The light reflected from the object is modulated into s-wave by the quarter-wave plate 9, the s-wave target light is totally reflected by the polarization beam splitter 8 and converged on the photodetector 13 by the second lens 12, and the data recorded on the plane of the photodetector 13 is single-pixel hologram information. The hologram data recorded by the photodetector 13 is transmitted to the computer 14 to remove unnecessary components from the hologram using digital image processing techniques, thereby improving the quality of the reproduced image.
Compared with the prior art, the gain effect of the invention is as follows:
1. the spatial light modulator replaces a two-dimensional scanning device, so that the stability of the system is improved, the noise in the hologram recording process caused by the vibration of the two-dimensional scanning device is eliminated, and the reconstruction quality of the hologram is improved.
2. The off-axis object light information can be recorded by using a larger sampling interval, and the effect of reducing the sampling time under the condition of the same reconstruction hologram quality is achieved.
3. The whole simplified traditional OSH optical system has the advantages of convenient and quick data processing and simple structure.
Drawings
FIG. 1 is a schematic diagram of the system structure of the method of the present invention.
FIG. 2 is a scanned beam pattern of an embodiment of the present invention.
FIG. 3 is a diagram of an oblique scanning beam according to an embodiment of the present invention.
Fig. 4 is a model of an object to be measured according to an embodiment of the present invention.
FIGS. 5(1) and (2) are a simulated hologram and a reconstruction model map without tilt scanning according to the embodiment of the invention.
FIGS. 6(1) and (2) are a simulated hologram and a reconstruction model diagram scanned at an angle of 45 degrees according to an embodiment of the present invention.
In the figure: the device comprises a laser 1, a small hole 2, a first lens 3, a first polaroid 4, a beam splitter 5, a spatial light modulator 6, a second polaroid 7, a polarization beam splitter 8, a quarter-wave plate 9, a rotating platform 10, an object 11, a second lens 12, a photoelectric detector 13 and a computer 14.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
Example 1: as shown in fig. 1, 2 and 3, reference numerals in the drawings denote: the device comprises a laser 1, a small hole 2, a first lens 3, a first polaroid 4, a beam splitter 5, a spatial light modulator 6, a second polaroid 7, a polarization beam splitter 8, a quarter-wave plate 9, a rotating platform 10, an object 11, a second lens 12, a photoelectric detector 13, a computer 14 and an object axis a. Wherein the optical axis direction of emergent light of the laser 1 keeps the same with the center of the small hole 2, the small hole 2 is arranged between the first lens 3 and the laser 1, and the distance between the small hole 2 and the first lens 3 is the focal length of the first lens 3. The first polaroid 4 and the beam splitter 5 are positioned at two sides of the first lens 3, and the spatial light modulator 6 is vertically arranged in the direction of the transmitted light of the beam splitter 5; the second polarizer 7 is located between the beam splitter 5 and the polarizing beam splitter 8. The quarter wave plate 9 is arranged between the polarization beam splitter 8 and the rotating platform 10, the object 11 is arranged on the rotating platform 10, the second lens 12 is arranged on two sides of the polarization beam splitter 8 and the photoelectric detector 13, and the photoelectric detector 13 is connected with the computer 14.
The invention relates to a static optical scanning tilt holography implementation method, which comprises the following steps:
step (1): parallel light emitted by the laser 1 is modulated into divergent spherical waves after passing through the small hole 2, the spherical light beams form plane waves after passing through the first lens 3, and the plane waves can be modulated into diagonal polarization plane waves after passing through the first polarizing film 4.
Step (2): the linear polarization plane wave irradiates the spatial light modulator 6 after passing through the beam splitter 5, and the spatial light modulator 6 modulates the polarization state in the vertical direction to generate plane wave and spherical wave with orthogonal polarization states. The light beam modulated by the spatial light modulator 6 forms interference fringes through the beam splitter 5 and the second polarizer 7, and the p-wave completely passing through the polarization beam splitter 8 becomes a scanning light beam with circular polarization state to scan the object 10 after passing through the quarter-wave plate 9.
Specifically, the expressions for modulating the horizontal and vertical components of the generated plane waves with orthogonal polarization states are:
P＝A1#
Figure BDA0002889287220000041
wherein A is1And A2Respectively representing the amplitude of the horizontal and vertical components, j being the unit of an imaginary number, k0In terms of the wave number, the number of waves,
Figure BDA0002889287220000042
for the offset phase shift amount, x and y denote the offset phase shift, respectively
Figure BDA0002889287220000046
Z is the light wave propagation direction.
The interference fringe expression on the object plane formed by the light waves on the two components after being transmitted by the second polaroid 7 is shown as
Figure BDA0002889287220000043
And (3): the spherical phase distributions are sequentially displayed to the spatial light modulator 6, and each spherical phase distribution has different phases and spatial offset, so that the aim of scanning a three-dimensional object by moving a scanning beam is fulfilled.
In particular, when the phase shift is
Figure BDA0002889287220000044
And the spatial offsets in the x and y directions are Δ x and Δ y, respectively, the scanning beam interference fringes are expressed as:
Figure BDA0002889287220000045
and (4): the turntable 10 is rotated to tilt the scanning beam at a certain angle with respect to the object axis, thereby realizing recording of off-axis object light with a larger sampling interval. The light reflected from the object is modulated into s-wave by the quarter-wave plate 9, the s-wave target light is totally reflected by the polarization beam splitter 8 and converged on the photodetector 13 by the second lens 12, and the data recorded on the plane of the photodetector 13 is single-pixel hologram information. The hologram data recorded by the photodetector 13 is transmitted to the computer 14 to remove unnecessary components in the hologram using a four-step phase shift algorithm to improve the quality of the reproduced image.
Specifically, the light after scanning the object 11 includes the relevant information of the object to be measured, and the current signal output as the current signal with the holographic information after being collected by the photodetector 13 is:
Figure BDA0002889287220000051
where l, w and h represent the length, width and depth, respectively, of the three-dimensional object, Γ0(x, y; z) represents the complex optical field of the object 11.
The reconstruction holographic information obtained by the calculation of the four-step phase shift algorithm is as follows:
Figure BDA0002889287220000052
wherein i0、iπ、
Figure BDA0002889287220000053
Respectively representing the offset phase shift amounts
Figure BDA0002889287220000054
Taking 0 percent,
Figure BDA0002889287220000055
Pi and
Figure BDA0002889287220000056
hologram information of time.
It will be appreciated by those of ordinary skill in the art that the examples described herein are intended to assist the reader in understanding the manner in which the invention is practiced, and it is to be understood that the scope of the invention is not limited to such specifically recited statements and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.

Claims (7)

1.一种静态光学扫描倾斜全息系统，其特征在于，包括：激光器1，小孔2，第一透镜(3)，第一偏振片(4)，分束镜(5)，空间光调制器(6)，第二偏振片(7)，偏振分束镜(8)，四分之一波片(9)、旋转台(10)、物体(11)，第二透镜(12)，光电探测器(13)，计算机(14)；1. a static optical scanning tilt holographic system, is characterized in that, comprises: laser 1, pinhole 2, first lens (3), first polarizer (4), beam splitter (5), spatial light modulator (6), second polarizer (7), polarizing beam splitter (8), quarter-wave plate (9), rotating stage (10), object (11), second lens (12), photodetection device (13), computer (14); 其中，所述激光器(1)出射光光轴方向与所述小孔(2)中心保持一致，所述小孔(2)置于所述第一透镜(3)和所述激光器(1)之间，且所述小孔(2)与所述第一透镜(3)之间的距离为所述第一透镜(3)的焦距长，所述第一偏振片(4)和分束镜(5)位于所述第一透镜(3)的两侧，所述空间光调制器(6)垂直置于所述分束镜(5)透射光的方向；所述第二偏振片(7)位于所述分束镜(5)和所述偏振分束镜(8)之间，所述四分之一波片(9)置于所述偏振分束镜(8)和所述旋转台(10)之间，所述物体(11)置于旋转台(10)上，所述第二透镜(12)位于所述偏振分束镜(8)和所述电探测器(13)的两侧，所述光电探测器(13)与所述计算机(14)相连接。Wherein, the direction of the optical axis of the light emitted from the laser (1) is consistent with the center of the small hole (2), and the small hole (2) is placed between the first lens (3) and the laser (1). and the distance between the small hole (2) and the first lens (3) is the focal length of the first lens (3), the first polarizer (4) and the beam splitter ( 5) Located on both sides of the first lens (3), the spatial light modulator (6) is placed vertically in the direction of the transmitted light of the beam splitter (5); the second polarizer (7) is located at Between the beam splitter (5) and the polarization beam splitter (8), the quarter-wave plate (9) is placed between the polarization beam splitter (8) and the rotating stage (10) ), the object (11) is placed on the turntable (10), the second lens (12) is located on both sides of the polarizing beam splitter (8) and the electrical detector (13), The photodetector (13) is connected to the computer (14). 2.一种静态光学扫描倾斜全息实现方法，其特征在于，包括如下步骤：2. a static optical scanning oblique holography realization method, is characterized in that, comprises the steps: 步骤1：激光器出射的平行光经小孔后调制为发散的球面波，球面光束经过第一透镜形成平面波，平面波经第一偏振片可调制为对角线偏振平面波；Step 1: The parallel light emitted by the laser is modulated into a diverging spherical wave after passing through the small hole. The spherical beam passes through the first lens to form a plane wave, and the plane wave can be modulated into a diagonally polarized plane wave through the first polarizer; 步骤2：线偏振平面波经分束镜后照射空间光调制器，空间光调制器调制竖直方向的偏振态，生成具有正交偏振态的平面波和球面波，经空间光调制器调制的光束通过分束镜和第二偏振片形成干涉条纹，完全通过偏振分束镜的p波经四分之一波片后成为具有圆偏振态的扫描光束扫描物体；Step 2: The linearly polarized plane wave irradiates the spatial light modulator after passing through the beam splitter, and the spatial light modulator modulates the polarization state in the vertical direction to generate plane waves and spherical waves with orthogonal polarization states, and the beam modulated by the spatial light modulator passes through The beam splitter and the second polarizer form interference fringes, and the p-wave completely passing through the polarization beam splitter becomes a scanning beam scanning object with a circular polarization state after passing through the quarter-wave plate; 具体地，经调制生成具有正交偏振态平面波的水平和竖直分量的表达式分别为：Specifically, the expressions for the horizontal and vertical components of a plane wave with orthogonal polarization states generated by modulation are: P＝A1#P=A 1 #
Figure FDA0002889287210000011
Figure FDA0002889287210000011
 其中，A1和A2分别表示水平和竖直分量的振幅，j为虚数单位，k0为波数，
Figure FDA0002889287210000012
为偏置相移量，x和y分别表示偏置相移
Figure FDA0002889287210000013
的空间偏移方向，z为光波传播方向；where A 1 and A 2 represent the amplitudes of the horizontal and vertical components, respectively, j is the imaginary unit, k 0 is the wave number,
Figure FDA0002889287210000012
is the offset phase shift amount, x and y represent the offset phase shift, respectively
Figure FDA0002889287210000013
The spatial offset direction of , z is the light wave propagation direction; 两个分量上的光波通过第二偏振片透射后形成的在物平面上干涉条纹表达式为：The expression of interference fringes on the object plane formed after the light waves on the two components are transmitted through the second polarizer is:
Figure FDA0002889287210000021
Figure FDA0002889287210000021
 步骤3：将球形相位分布依次顺序显示给空间光调制器，每个球形相位分布具有不同的相位和空间偏移，从而实现移动扫描光束扫描三维物体的目的；Step 3: Display the spherical phase distribution to the spatial light modulator in sequence, each spherical phase distribution has different phases and spatial offsets, so as to achieve the purpose of moving the scanning beam to scan the three-dimensional object; 具体地，当相移为
Figure FDA0002889287210000022
且在x和y方向上的空间偏移分别为Δx和Δy时，扫描光束干涉条纹的表达式为：Specifically, when the phase shift is
Figure FDA0002889287210000022
And when the spatial offsets in the x and y directions are Δx and Δy, respectively, the expression of the scanning beam interference fringes is:
Figure FDA0002889287210000023
Figure FDA0002889287210000023
 步骤4：转动旋转台，使扫描光束相对于物轴倾斜一定角度，实现使用较大的采样间距来记录离轴物体光，从物体反射的光通过四分之一波片调制为s波，s波目标光被偏振分束镜完全反射，并被第二透镜会聚到光电探测器上，光电探测器平面所记录的数据为单像素全息图信息，将光电探测器记录的全息图数据传输至计算机14使用数字图像处理技术消除全息图中不必要的成分，以提高再现像质量；Step 4: Rotate the turntable so that the scanning beam is inclined at a certain angle relative to the object axis, so that the off-axis object light can be recorded with a larger sampling interval, and the light reflected from the object is modulated into s-wave by a quarter-wave plate, s The wave target light is completely reflected by the polarization beam splitter, and is converged on the photodetector by the second lens. The data recorded on the photodetector plane is the single-pixel hologram information, and the hologram data recorded by the photodetector is transmitted to the computer. 14 Use digital image processing technology to eliminate unnecessary components in the hologram to improve the quality of reproduced images; 具体地，扫描物体后的光包含待测物体的相关信息，由光电探测器收集后输出为带有全息信息的电流信号为：Specifically, the light after scanning the object contains the relevant information of the object to be measured, and is collected by the photodetector and output as a current signal with holographic information:
Figure FDA0002889287210000024
Figure FDA0002889287210000024
 其中，l、w和h分别表示三维物体的长度，宽度和深度，Γ0(x，y；z)表示物体11的复光场。Among them, l, w and h represent the length, width and depth of the three-dimensional object, respectively, and Γ 0 (x, y; z) represents the complex light field of the object 11 . 3.根据权利要求1所述的一种静态光学扫描倾斜全息实现方法，其特征在于，所述步骤1中的激光器出射光光轴方向与小孔中心保持一致。3 . The method for realizing static optical scanning tilt holography according to claim 1 , wherein the direction of the optical axis of the laser output light in the step 1 is consistent with the center of the small hole. 4 . 4.根据权利要求1所述的一种静态光学扫描倾斜全息实现方法，其特征在于，所述步骤1中旋转第一偏振片使之与其光轴夹角为45°，使平面波经第一偏振片调制为对角线偏振平面波。4. a kind of static optical scanning oblique holography realization method according to claim 1, is characterized in that, in described step 1, rotate the first polarizer to make its included angle with its optical axis be 45 °, make plane wave pass through the first polarization The plate is modulated as a diagonally polarized plane wave. 5.根据权利要求1所述的一种静态光学扫描倾斜全息实现方法，其特征在于，5. a kind of static optical scanning oblique holography realization method according to claim 1, is characterized in that, 所述步骤2中的扫描光束是对角线性偏振光经第二偏振片形成的。The scanning beam in the step 2 is formed by diagonally linearly polarized light through the second polarizer. 6.根据权利要求1所述的一种静态光学扫描倾斜全息实现方法，其特征在于，所述步骤3中移动的扫描光束是由空间光调制器顺序加载球形相位分布的干涉条纹实现的。6 . The method for realizing static optical scanning tilt holography according to claim 1 , wherein the moving scanning beam in step 3 is realized by sequentially loading interference fringes with spherical phase distribution by a spatial light modulator. 7 . 7.根据权利要求1所述的一种静态光学扫描倾斜全息实现方法，其特征在于，所述步骤4中的旋转台，旋转角度可精确控制。7 . The method for realizing static optical scanning tilt holography according to claim 1 , wherein the rotation angle of the rotary table in the step 4 can be precisely controlled. 8 .
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