Holographic stereogram printing system based on LCOS

Abstract

The invention relates to the technical field of holographic stereogram printing, in particular to an LCOS (Liquid Crystal On Silicon)-based holographic stereogram printing system, which comprises a light beam emitting module, a control module, a beam expanding module, a light splitting module, an optical path adjusting module, an afocal telecentric inversion module and a holographic plate, the light beam transmitting module transmits a light beam to the beam expanding module, the beam expanding module expands the light beam to M times and then transmits the light beam to the light splitting module, the light beam is split by the light splitting module and then is transmitted to the optical path adjusting module and the holographic plate, the optical path adjusting module adjusts the optical path of the light beam and then transmits the light beam to the afocal telecentric inversion module, and the afocal telecentric inversion module transmits the light beam to the holographic plate. The afocal telecentric inversion module emits the light beam to the holographic plate.

Description

Technical Field

[0001] This invention relates to the field of holographic volume view printing technology, and more specifically to a holographic volume view printing system based on LCOS. Background Technology

[0002] Holographic volume view printing is a 3D display technology that combines the principle of binocular parallax with holographic printing technology. By acquiring discrete 2D parallax images and combining them with the principle of binocular parallax, an immersive 3D scene can be reconstructed. A camera array is set up in 3D modeling software to acquire 3D scene images. The acquired images are converted into holographic unit (Hogel) encoded images. Each encoded image is sequentially printed onto a holographic plate to form a Hogel. Finally, the holographic volume view is illuminated with white light, and the 3D scene is reconstructed through the principle of diffraction.

[0003] DeBitetto pioneered a method for printing horizontal parallax holographic volume views, using a camera to sample a 3D scene horizontally, then sequentially exposing the sampled images onto a series of holographic slits on a holographic plate. Halle et al. at MIT proposed and continuously refined a printing technology called Ultragram, leading to the founding of Zebra Imaging. This technology places the sampling camera plane at infinity from the holographic plate plane for image sampling, then performs pixel segmentation and reconstruction of the sampled images to directly obtain Hogel-coded light field information suitable for exposure. D. Brotherton-Ratcliffe and S.J. Zacharovas developed laser-based direct-write holographic printing technology. In recent years, numerous scholars have conducted research on composite holographic volume view printing technology and achieved significant results.

[0004] Although some scholars have successfully constructed holographic volume view printing systems based on LCOS, these systems all use expensive pulsed lasers for printing, reducing the universality of the printing systems. Therefore, this paper uses a 532nm continuous laser to achieve holographic stereoscopic image printing. Furthermore, based on the reflective characteristics of LCOS, some optical instruments in the optical path are reused to optimize the overall structure of the optical system. Therefore, how to provide a holographic volume view printing system based on LCOS is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a holographic volume view printing system based on LCOS, which aims to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A holographic volume view printing system based on LCOS includes: a beam emitting module, a beam expanding module, a beam splitting module, an optical path adjustment module, a focusless telecentric reversal module, and a holographic plate. The beam emitting module emits a beam to the beam expanding module, which expands the beam to M times and then emits it to the beam splitting module. After being split by the beam splitting module, the beam is emitted to the optical path adjustment module and the holographic plate, respectively. The optical path adjustment module adjusts the optical path of the beam and then emits it to the afocal telecentric reversal module. The afocal telecentric reversal module emits the beam to the holographic plate.

[0007] Furthermore, it also includes a shutter module, which is disposed between the beam expander module and the beam splitter module and located on the optical path, and the shutter module is signal-connected to the control module.

[0008] Furthermore, the beam expander module sequentially includes lens l1, pinhole, and lens l2, wherein lens l1 and lens l2 are confocal.

[0009] Furthermore, the beam splitting module sequentially includes a half-wave plate, a first polarizing beam splitter, a lens l3, a lens l4, an aperture B, and a half-wave plate. After the beam passes through the first polarizing beam splitter, it is split into an object beam and a reference beam, and the object beam and the reference beam maintain coherence. The half-wave plate at the front end of the first polarizing beam splitter is used to adjust the energy ratio between the object beam and the reference beam.

[0010] Furthermore, the optical path adjustment module consists of at least four reflectors and a high-precision displacement stage, wherein the reflectors are mounted on the high-precision displacement stage and move on the high-precision displacement stage.

[0011] Furthermore, the afocal telecentric reversal module sequentially includes a half-wave plate, a microlens array, a second polarizing beam splitter, a lens group L0, a reflective LCOS, a lens group L1, and a lens group L2. The lens group L0 is confocal with the microlens array, and the reflective LCOS is placed at the back focal plane of the lens group L0. The microlens array is composed of multiple square microlenses, and the beam is irradiated onto the holographic plate after passing through the microlens array.

[0012] Furthermore, the holographic plate is positioned at the rear optical path of the afocal telecentric reversal module. After the object light is converged by the afocal telecentric reversal module, it interferes with the reference light on the holographic plate.

[0013] Furthermore, the system is also equipped with a control module, which includes a motor control unit, an LCOS control unit, and a shutter control unit. The shutter control unit is signal-connected to the shutter module and controls the shutter module to work.

[0014] Furthermore, based on the reflective LCOS characteristics, lens group L0 is reused as lens group L1, that is, lens group L0 and lens group L1 are the same lens group.

[0015] Furthermore, the microlens array and the lens group L0 convert the incident beam into a series of parallel beams incident at different angles in an LCOS-reflected manner.

[0016] Compared to existing technologies, this invention is able to... Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a holographic volume view printing system based on LCOS according to the present invention.

[0019] Figure 2 This is a schematic diagram of an object-optical path system according to the present invention, wherein (a) is a schematic diagram of the optical path of the object light incident on the LCOS, and (b) is a schematic diagram of the optical path of the LCOS reflected beam reflected to the main objective lens.

[0020] Figure 3 This invention relates to the relationship between the beam convergence angle and the observable angle of the hologram during the printing of a holographic stereoscopic image, wherein (a) is the convergence angle of the main objective lens and (b) is the field of view angle of the hologram.

[0021] Figure 4 This is a schematic diagram of the structure of an object-optical system according to the present invention.

[0022] Figure 5 The present invention relates to the structural relationship of lens group L0, lens group L1, lens group L2 and main objective lens, wherein (a) is lens group L0, (b) is lens group L1, (c) is lens group L2 and (d) is main objective lens.

[0023] Figure 6 This is a point diagram of each lens group according to the present invention, wherein (a) is a point diagram of lens group L0, (b) is a point diagram of lens group L1, (c) is a point diagram of lens group L2, and (d) is a point diagram of the main objective lens.

[0024] Figure 7This invention provides a modulation transfer function for each lens group, wherein (a) is the modulation transfer function of lens group L0, (b) is the modulation transfer function of lens group L1, (c) is the modulation transfer function of lens group L2, and (d) is the modulation transfer function of the main objective lens.

[0025] Figure 8 This is a schematic diagram illustrating the construction of a holographic volume view system based on LCOS according to the present invention.

[0026] Figure 9 This is a schematic diagram of an initial image and a reconstructed image of a letter according to the present invention, wherein (a) is the initial image and (b) is the reconstructed image.

[0027] Figure 10 This is a schematic diagram of the initial image and reconstructed image of an article according to the present invention, wherein (a) is the initial image and reconstructed image of a teapot, (b) is the initial image and reconstructed image of an astronaut, and (c) is the initial image and reconstructed image of a cat.

[0028] Figure 11 This is a schematic diagram of SSIM result analysis according to the present invention. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figure 1 As shown, the LCOS-based holographic volume view printing system includes: a computer, a motor controller, a LCOS controller, a shutter controller, a beam expander, a beam splitter, an optical path adjustment module, and a focusless telecentric reversal module.

[0031] The beam expanding system includes lenses l1 and l2, and a pinhole, which expands the beam to the size of the microlens array (MLA) aperture. l1 and l2 are confocal, and the focal length of l1 is denoted as . The focal length of l2 is The beam expansion factor M of the beam expanding system can be expressed as: ; In order to completely cover the MLA with the beam, the beam aperture MLA caliber The relationship can be represented as: ; Placing a pinhole on the back focal plane of the lens can filter out the high-frequency components of the beam, thereby improving the wavefront quality.

[0032] The beam splitting module is equipped with a half-wave plate, a first polarizing beam splitter (PBS 1), lenses l3 and l4, an aperture B, and a half-wave plate.

[0033] The laser beam, after passing through the beam expander system, is split into object beams (such as...) by a polarizing beam splitter (PBS). Figure 1 (Light represented in green) and reference light (e.g.) Figure 1 (The light in pink represents the light in the middle), and the two beams of light remain coherent.

[0034] The half-wave plate located at the front end of PBS 1 is used to adjust the energy ratio between the object beam and the reference beam.

[0035] The optical path adjustment module consists of four mirrors and a high-precision displacement stage. Its function is to adjust the optical path of the object beam, reduce the optical path difference between the object beam and the reference beam, and thus increase the overlap time of the two beams on the holographic plate. If the optical path difference is too large, one of the beams will not participate in the coherent recording on the holographic plate during exposure, thereby reducing the contrast and diffraction efficiency of the reconstructed holographic stereogram.

[0036] Afocal telecentric reversal module: half-wave plate, MLA, PBS 2, lens group L0, reflective LCOS, composed of lens groups L1 and L2; Considering the reflection characteristics of LCOS, L0 can be reused as L1, that is, L0 and L1 are the same lens group, which can effectively shorten the length of the optical system; Working principle: Figure 2 This is a schematic diagram of the object-oriented optical path system. The system employs an amplitude-modulated LCOS (Xi'an Zhongke Weixing Optoelectronics Technology Co., Ltd.), with a resolution of 4096(H) × 2400(V) and an effective display area of ​​15.31 mm(H) × 8.98 mm(V). Compared to LCDs, LCOS offers higher optical efficiency and contrast, significantly improving the detail reproduction capability of holograms.

[0037] (a) Beam incident on LCOS (b) LCOS reflected beam L0 and MLA are confocal, and the LCOS is positioned at the back focal plane of L0. The selected microlens array is the Thorlabs MLA1M1, which consists of 9(H) × 7(V) square microlenses, each measuring 1.0 mm(H) × 1.4 mm(V) with a convergence angle of 6.8°. The microlens array has a dual function in the system: first, it shapes the beam into a square-section beam with uniform energy, matching its shape to the effective display area of ​​the LCOS; second, the microlens array and L0 can convert the incident beam into a series of parallel beams incident on the LCOS at different angles. This process can be considered as a beam expander system composed of microlenses and L0. To ensure that the beam passing through a single microlens completely covers all pixels of the LCOS, the beam size must completely cover the LCOS. Let the focal length of MLA be... The focal length of L0 is MLA diameter is The size of LCOS is The aperture of the incident light spot on the LCOS surface is Then the aperture of the light spot can be expressed as: ; ; To fully utilize the optical energy, the redundancy of the laser spot diameter is controlled to not exceed 10% of the LCOS size. A half-wave plate is installed in front of the microlens array to adjust the P-polarization component of the laser, ensuring that all laser energy can be reflected to the LCOS through the polarization beam splitter.

[0038] LCOS constructs a spatial image by controlling the polarization direction of light incident on each pixel. Its modulation principle is based on pixel grayscale values: fully bright pixels rotate their polarization direction by 90°, fully black pixels keep their polarization unchanged, while grayscale pixels undergo a corresponding degree of polarization rotation.

[0039] L1 and L2 together form a focal-free telecentric reversal module. This module does not change the divergence or convergence characteristics of the beam, but only adjusts the beam diameter. Its function is to expand the object beam and transmit the modulated beam to the main objective lens.

[0040] Figure 3 This demonstrates the relationship between the beam convergence angle during holographic stereoscopic printing and the observable angle of the hologram during reconstruction, where (a) represents the convergence angle of the main objective lens. (b) represents the holographic field of view angle 2. According to the principle of reversibility of light, if the object light moves at a speed of 2... When incident on a holographic plate, the field of view observed by the human eye during the reconstruction process is also 2. To increase the viewing angle of the hologram, the object beam needs to be incident on the holographic plate at a larger convergence angle. Therefore, L1 and L2 are used to expand the beam to the maximum size that the objective lens aperture can cover.

[0041] Let the focal length of L1 be... The focal length of L2 is The aperture of the primary objective lens is The aperture of the light spot on the surface of the primary objective lens is: ; Since L0 is multiplexed as L1, therefore: ; ; ; The holographic plate is placed on the back focal plane of the primary objective lens. The object beam, after being converged by the primary objective lens, interferes with the reference beam on the holographic plate, forming a Hogel pattern. Let the focal length of the primary objective lens be . Hogel size is ,therefore: ; ; If the holographic plate is not placed at the rear focal plane of the objective lens, the object beam will form a conjugate image of the LCOS behind the primary objective lens. Placing the holographic plate at the rear focal plane of the objective lens for printing essentially records the wavefront information at that location onto the holographic plate. When the holographic volume view is illuminated with reference light, the original wavefront at that location can be reconstructed. The reconstructed original wavefront propagates behind the objective lens and reproduces the LCOS image at a specific location, which is exactly the same as the imaging location of the system without the holographic plate.

[0042] The reference beam optical path system is designed to generate a beam with a similar shape, size, and polarization state to the object beam, and to be incident on the holographic plate at a specific angle. A confocal lens and a beam expander are used to adjust the size of the reference beam to a suitable range. A square aperture is used to shape the reference beam into a square beam; without this shaping, the alignment accuracy between the object and reference beams would decrease. The reference beam is slightly larger than the object beam to prevent it from exceeding the coverage area of ​​the reference beam. A mirror guides the reference beam to the surface of the holographic plate. A polarizer modulates the polarization state of the reference beam to match that of the object beam, while a half-wave plate controls the energy of the reference beam. A ratio that is too high reduces interference efficiency, while a ratio that is too low may prevent the LCOS image from being fully recorded on the holographic plate. A long focal length lens L5 placed behind the mirror compensates for beam distortion caused by reflection (i.e., beam decentering), the degree of which is determined by the reflection angle.

[0043] The electronic shutter, LCOS, and 2D displacement stage are synchronously controlled by a computer. After the coded image is loaded onto the LCOS, the electronic shutter is triggered to cause interference between the object beam and the reference beam, recording the image on the holographic plate and completing the printing of a single Hogel. The 2D displacement stage then moves to the next Hogel printing position, repeating the process until all Hogels are printed. After the holographic plate undergoes development and bleaching, a holographic volume view is obtained.

[0044] Simulation and optimization of the object-optical system: Figure 4 This describes the structure of the object-optical system. The beam is homogenized by the MLA and then reflected by the PBS to the LCOS. After modulation and reflection by the LCOS, the object beam is incident on the unfocused telecentric inversion module composed of L1 and L2 and expanded until it reaches the aperture of the primary objective lens. Finally, the object beam interferes with the reference beam on the holographic plate, forming a Hogel. The system has a working F-number (WFNO) of 0.524, enabling high resolution. The total length of the object-optical system is 436.5 mm, making its structure relatively compact. The Hogel dimensions are 1.27 mm (H) × 1.21 mm (V), and the field of view of the hologram is approximately 90°.

[0045] Figure 5 The structural relationship between L0, L1, L2, and the main objective lens is illustrated. The main objective lens features a large numerical aperture and high resolution, with a focal length of 19.0 mm at 532 nm, a back focal length of 3.69 mm, an entrance pupil diameter of 32 mm, and a convergence angle greater than 45°. L0 & L1 have a focal length of 70.86 mm and a light-transmitting aperture of 50.2 mm; L2 has a focal length of 125.89 mm and a light-transmitting aperture of the same size. The lens aperture was selected based on the fact that most commercially available lens holders are 1 inch or 2 inch in size. Since the spot size on the main objective lens surface exceeds 1 inch, the optical lens size of L0 & L1 and L2 is standardized to 2 inches.

[0046] Figure 6Point diagrams of each lens group: (a) L0, (b) L1, (c) L2, (d) Primary objective lens. For L0, at the maximum beam divergence angle, the RMS radius of the focal plane is 10.648 μm, and the Airy radius is 6.009 μm. For L1, the RMS radius of the focal plane corresponding to the maximum divergence angle is 4.170 μm, and the Airy radius is 6.015 μm. For L2, the RMS radius of the focal plane corresponding to the maximum divergence angle is 12.420 μm, and the Airy radius is 10.220 μm. For the primary objective lens, the Airy radius is 0.4565 μm: at a field of view of 0°, the RMS radius at the focal point is 0.665 μm; at a field of view of 1.9°, the RMS radius increases to 2.257 μm. At the maximum field of view, L0, L1, and L2 all exhibit good energy concentration characteristics. The objective lens produces good image quality at a 0° field of view, but its energy concentration is relatively poor at an incident angle of 1.9°. When the field of view reaches 0.79°, the Airy radius is approximately 60% of the RMS radius. This situation needs to be improved through overall optimization of the objective-optical system.

[0047] Figure 7 The modulation transfer function (MTF) of L0, L1, L2, and the primary objective lens is shown. For L0, the MTF in the meridional direction is relatively low at a field of view of 5.9°, but in other cases, the MTF at a spatial frequency of 90 lp / mm is greater than 0.3. The MTF of L1 at 100 lp / mm is greater than 0.3 and close to the diffraction limit.

[0048] The L2 lens has a relatively low MTF in the meridional direction at a field of view of 6.1°, but in other cases, the MTF at 60 lp / mm is greater than 0.3. The objective lens has an MTF greater than 0.3 at a spatial frequency of 150 lp / mm.

[0049] Simulation results: Based on Zemax lens data, a simulation system was constructed as follows... Figure 8 The LCOS holographic volume view printing system shown is based on an MSL-R laser from Changchun New Industries Optoelectronic Technology Co., Ltd., with an output power of 2W. A square aperture is placed behind the holographic dry plate, and the size of the aperture is adjusted to ensure that the reference beam and the object beam are completely superimposed.

[0050] To study the reproduction effect of this printing system, an image of the bolded "Hololab" text was loaded onto the LCOS. The objective light was imaged behind the rear focal plane of the objective lens, and a CCD was placed behind the rear focal plane of the objective lens to acquire the reproduced image. Figure 9 The comparison between the original image and the reconstructed image is shown: the reconstructed image is clearly visible, but due to the strong converging effect of the objective lens, slight distortion occurs at the image edges. Images of the "teapot," "astronaut," and "cat" were loaded into LCOS respectively, and the images were then reproduced using a CCD. The results are as follows: Figure 10 As shown. The "teapot" was chosen to verify the system's ability to reproduce low-frequency contour information, while the "astronaut" and "cat" were used to examine the system's performance in reproducing high-frequency details. The teapot's outline is clearly discernible, especially the outlines of the lid and spout, which closely match the original image. The bottom shadow is also well represented in the reproduced image. The astronaut's hand wrinkles are rendered with exceptional clarity, but the stripes on his trousers are not effectively reproduced in the reproduced image. Similar to the astronaut image, the cat's facial fur details are poorly reproduced in the reproduced image, with only some whiskers showing relatively clear visual effects. The Structural Similarity Index Measure (SSIM) is used to analyze image reconstruction performance, and its calculation formula is as follows: ; x and y are two images to be compared. and It is the mean of x and y. and They are their respective standard deviations. It is the covariance of x and y. and Two constants are used to avoid a denominator of 0. The SSIM value ranges from -1 to 1. When SSIM is -1, it indicates that the two images are completely dissimilar, and when it is 1, it indicates that they are completely similar. Before calculating SSIM, the resolution and RGB values ​​of the original image must be adjusted to match those of the reconstructed image to ensure that they are consistent in resolution and RGB values. The SSIM results for each set of images are calculated using MATLAB as follows: Figure 11 As shown.

[0051] The "Hololab" and "Teapot" image sets show good reconstruction results, while the "Astronaut" and "Cat" sets have relatively low SSIM values. This is because the first two sets of images are mainly composed of bold outlines, while the latter two sets contain more detailed textures. This system exhibits excellent reconstruction performance on low-frequency images with sharp edges and high-contrast outlines. These images lack high-frequency spatial details and have relatively smooth light field distributions. This smooth distribution allows for better matching of the objective lens's optical performance with the system's imaging characteristics.

[0052] Despite the high numerical aperture and high resolution of the objective lens, the transmission efficiency of high-frequency information (corresponding to image details) is still limited. In contrast, simple linear contour images, which are dominated by low-frequency information, can significantly reduce aberrations caused by optical diffraction and modulation limitations during imaging, thus achieving a sharper image. This application analyzes the functions of different optical elements and proposes lens selection criteria for a holographic volume view printing system based on LCOS. Subsequently, the object-optical system is simulated and optimized using Zemax, and a physical printing system is built based on the lens data. The total length of the object-optical system is 436.5 mm, and the Hogel size does not exceed 1.27 mm (H) × 1.21 mm (V). Experiments show that this system performs better in reconstructing low-frequency information with sharp edges and high contrast, a characteristic that provides guidance for selecting appropriate 3D scene types during holographic printing. Finally, Blender is used to acquire 3D scene images and converts them into directly exposed coded images according to the Ultragram principle. Under white light illumination, a 3D scene can be reconstructed with a field of view of up to 90°. The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A holographic volume view printing system based on LCOS, characterized in that, include: Beam emission module, beam expander module, beam splitter module, optical path adjustment module, afocal telecentric reversal module, and holographic plate; The beam emitting module emits a beam to the beam expanding module, which expands the beam to M times and then emits it to the beam splitting module. After being split by the beam splitting module, the beam is emitted to the optical path adjustment module and the holographic plate, respectively. The optical path adjustment module adjusts the optical path of the beam and then emits it to the afocal telecentric reversal module. The afocal telecentric reversal module emits the beam to the holographic plate.

2. The LCOS-based holographic volume view printing system according to claim 1, characterized in that, It also includes a shutter module, which is disposed between the beam expander module and the beam splitter module and located on the optical path, and the shutter module is signal-connected to the control module.

3. The LCOS-based holographic volume view printing system according to claim 1, characterized in that, The beam expander module includes a lens l1, a pinhole, and a lens l2, wherein the lens l1 and the lens l2 are confocal.

4. The LCOS-based holographic volume view printing system according to claim 1, characterized in that, The beam splitting module includes a half-wave plate, a first polarizing beam splitter, a lens l3, a lens l4, an aperture B, and a half-wave plate in sequence. After the beam passes through the first polarizing beam splitter, it is split into an object beam and a reference beam, and the object beam and the reference beam maintain coherence. The half-wave plate at the front end of the first polarizing beam splitter is used to adjust the energy ratio between the object beam and the reference beam.

5. A holographic volume view printing system based on LCOS according to claim 1, characterized in that, The optical path adjustment module consists of at least four reflectors and a high-precision displacement stage. The reflectors are mounted on the high-precision displacement stage and move on the high-precision displacement stage.

6. A holographic volume view printing system based on LCOS according to claim 1, characterized in that, The afocal telecentric reversal module sequentially includes a half-wave plate, a microlens array, a second polarizing beam splitter, a lens group L0, a reflective LCOS, a lens group L1, and a lens group L2. The lens group L0 is confocal with the microlens array, and the reflective LCOS is placed at the back focal plane of the lens group L0. The microlens array is composed of multiple square microlenses, and the beam is irradiated onto the holographic plate after passing through the microlens array.

7. A holographic volume view printing system based on LCOS according to claim 1, characterized in that, The holographic plate is positioned at the rear optical path of the afocal telecentric reversal module. After the object light is converged by the afocal telecentric reversal module, it interferes with the reference light on the holographic plate.

8. A holographic volume view printing system based on LCOS according to claim 2, characterized in that, The system is also equipped with a control module, which includes a motor control unit, an LCOS control unit, and a shutter control unit. The shutter control unit is signal-connected to the shutter module and controls the shutter module to work.

9. A holographic volume view printing system based on LCOS according to claim 6, characterized in that, Based on the reflective LCOS characteristics, lens group L0 is reused as lens group L1, that is, lens group L0 and lens group L1 are the same lens group.

10. A holographic volume view printing system based on LCOS according to claim 6, characterized in that, The microlens array and the lens group L0 convert the incident beam into a series of parallel beams incident at different angles on the reflective LCOS.

Images