CN115071128B - Fast holographic 3D copying method and system based on Fourier transform - Google Patents
Fast holographic 3D copying method and system based on Fourier transform Download PDFInfo
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- CN115071128B CN115071128B CN202210655131.8A CN202210655131A CN115071128B CN 115071128 B CN115071128 B CN 115071128B CN 202210655131 A CN202210655131 A CN 202210655131A CN 115071128 B CN115071128 B CN 115071128B
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- 238000001228 spectrum Methods 0.000 claims description 8
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- 239000000428 dust Substances 0.000 claims description 2
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- 238000010146 3D printing Methods 0.000 abstract description 8
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
- B29C64/129—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
- B29C64/135—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask the energy source being concentrated, e.g. scanning lasers or focused light sources
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/264—Arrangements for irradiation
- B29C64/268—Arrangements for irradiation using laser beams; using electron beams [EB]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/264—Arrangements for irradiation
- B29C64/277—Arrangements for irradiation using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED]
- B29C64/282—Arrangements for irradiation using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED] of the same type, e.g. using different energy levels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
Abstract
The invention discloses a fast holographic 3D copying method and system based on Fourier transform, the system comprises a recording part, a reproducing part and a data processing part, wherein the recording part scans and records the outline information of an object to be scanned, and the data processing part inputs the information recorded by a CCD in the recording part to an SLM of the reproducing part after processing; and (3) irradiating the laser of the reproduction part into a photosensitive resin tank after SLM modulation, and solidifying and forming the material through a photo-curing effect to finally obtain an object with the same appearance as the scanned object. Compared with parts manufactured by adopting a traditional 3D printing mode of layer-by-layer stacking molding, the surface quality uniformity is good, and the mechanical property layering phenomenon of the parts can not exist. The forming speed is far greater than the traditional layer-by-layer printing speed, the manufacturing efficiency is improved, the parts with the same shape as the parts are manufactured by using the existing part model, the rapid copying requirement of three-dimensional entities can be met, and a new development idea is provided for the additive manufacturing technology.
Description
Technical Field
The invention belongs to the technical field of additive manufacturing, and particularly relates to a fast holographic 3D copying method and system based on Fourier transform.
Background
3D printing, also known as additive manufacturing, is an advanced manufacturing technique that differs from traditional subtractive or additive manufacturing, and relies primarily on the continual build-up of materials to form the desired shape of the part.
In the existing 3D printing technology, a great deal of material layer-by-layer stacking and forming method is applied. Common are: FDM (fused deposition), SLA (light curing), SLS (selective laser sintering), DLP (digital light processing), etc., these technologies generally adopt a layer-by-layer molding, continuous accumulation manner, that is, after layering the part model to be printed, each layer of material is piled from point to line, then from surface to surface, and finally, the layers are stacked layer by layer to form a three-dimensional entity. (DLP is a direct face-to-body printing process).
Although the above manufacturing method can be used to manufacture any structural model, there are some drawbacks, including: the printing time is long, and the efficiency is low; support is often required to be added when a complex structure is printed, and a support removing process in post treatment is complex, so that time and labor are consumed; the layering phenomenon is easy to occur in the mechanical characteristics of the parts in the layering manufacturing process, so that the structural strength of the parts is reduced, and the service life is shortened; the surface quality of the parts is lower.
In the invention patent CN 109732910B holographic 3D printing apparatus and holographic 3D printing method, the printed material can be integrally formed by using an area array holographic light source, but the method is only applicable to the material forming by irradiating the light source from a single direction. And the model data is derived from an area array holographic light source and cannot be directly obtained from an original.
In the invention patent CN 108501363B, a holographic dry plate with a hologram of an object to be printed is manufactured in advance by irradiating a coherent light source, and the formed three-dimensional solid image is utilized to realize one-time omnibearing stereoscopic polymerization of photosensitive materials. However, the method needs to manufacture a plurality of holographic dry plates in advance and put the holographic dry plates at a certain position, and the holographic dry plates cannot be reused due to complex devices and complicated operations. In addition, if the positions of the holographic dry plates deviate, printing double images and dislocation are easy to occur, and printing failure is caused.
In view of the above, the concept of copy manufacturing has not been proposed in the manufacturing field, and it is impossible to precisely and conveniently manufacture parts having the same shape as those of the existing part models.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a fast holographic 3D copying method based on Fourier transform, which can record model data of the outer contour of an original part through laser scanning, and can generate a photocuring effect in liquid photosensitive resin by utilizing a holographic imaging principle after data processing to fast shape the outer contour of the scanned part of the original part. In the rotation process of the original part, the outer contour is scanned completely gradually, the time cost of manufacturing is reduced, the surface quality of the part and the integral consistency of the mechanical characteristics of the part are improved, and the part with the same shape as the part is manufactured quickly by using the existing part model.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the fast holographic 3D copying system based on Fourier transform comprises a recording part and a reproducing part, wherein the recording part comprises a first semiconductor laser, a first beam expander, a first half mirror, a total reflection mirror, a second half mirror, a first Fourier transform lens, a CCD camera and a first rotary platform; light emitted from a first semiconductor laser enters a first beam expander to expand beams, the beams are divided into two paths through a first half mirror, a first rotary platform, a first Fourier transform lens, a second half mirror and a CCD camera are sequentially arranged in a first light path, and a total reflection mirror, a second half mirror and the CCD camera are sequentially arranged in a second light path; the first rotating platform is used for placing an object to be scanned;
the reproduction part comprises a second semiconductor laser, a second beam expander, a spatial light modulator, a second Fourier transform lens and a second rotary platform which are arranged along the optical path, wherein a container filled with photosensitive resin is arranged on the second rotary platform;
the CCD camera and the spatial light modulator are connected with a computer through an I/O interface.
The first rotary platform and the second rotary platform are driven by the same rotary driving mechanism or the first rotary platform and the second rotary platform are respectively driven by one rotary driving mechanism, and the two rotary driving mechanisms synchronously rotate.
And limit switches are arranged on the rotating paths of the first rotating platform and the second rotating platform and are connected with the input end of the upper computer of the driving mechanism.
The first light path, the second light path and the light path of the reproduction part are provided with anti-interference protection sleeves.
The recording portion and the reproducing portion are provided with dust covers on the outer sides thereof.
The first semiconductor laser and the second semiconductor laser adopt the same semiconductor laser, the first Fourier transform lens and the second Fourier transform lens adopt the same Fourier transform lens, and the first half-mirror and the second half-mirror adopt the same half-mirror.
The power of the laser is larger than 20mW, and the fundamental mode is Gaussian; the spatial light modulator adopts amplitude-phase mixed modulation, the resolution is larger than or equal to 1024×768, and the contrast is larger than or equal to 1000:1, the display speed is more than or equal to 60Hz, and the spectrum range is more than or equal to 400nm-700nm.
The invention also provides a copying method based on the rapid holographic 3D copying system, wherein laser is emitted by the first semiconductor laser, is irradiated to the first half-mirror after being expanded by the first beam expander, and is divided into a first beam and a second beam by the first half-mirror; the first beam irradiates the surface of an object to be scanned placed on the first rotary platform through a first half-mirror, and reflected light of the surface of the object to be scanned irradiates a CCD camera after being subjected to Fourier transform through a first Fourier transform lens; the second light beam irradiates the receiving surface of the CCD camera after being reflected by the first half-reflecting mirror, the total reflecting mirror and the second half-reflecting mirror, and interferes with the first light beam on the CCD camera; the CCD camera receives all information generated by interference of two beams of light, and the contour information of an object can be loaded on the spatial light modulator after being processed by a computer; the first rotary platform rotates around the axis of the first rotary platform to drive an object to be scanned placed above the first rotary platform to rotate so as to scan the whole outline of the object to be scanned; the laser is emitted by a second semiconductor laser, is irradiated on a spatial light modulator after being expanded by a second beam expander, is projected to a container which is placed on a second rotary platform and is filled with photosensitive resin after being subjected to inverse transformation by a second Fourier transform lens, and finally reproduces a holographic image of the outer contour of the part of the object to be scanned, which is scanned by a recording part; the light-sensitive resin at the corresponding position in the container filled with the light-sensitive resin is subjected to laser irradiation to generate a light curing effect, the second rotary platform synchronously rotates along with the first rotary platform, the outline of the object to be scanned is gradually scanned completely along with the rotation of the platform, and all the outline of the scanned object is finally molded in the container filled with the light-sensitive resin, so that the 3D printing structure of the object to be scanned is formed.
Compared with the prior art, the invention has at least the following beneficial effects:
according to the invention, by utilizing the Fourier transform property of the lens, an object is placed at the front focal plane of the lens, the Fourier transform spectrum of the object light wave can be obtained at the conjugate image plane of the illumination light source, then the reference light is introduced to interfere with the Fourier transform spectrum, and all information of the Fourier transform light field of the object light wave can be recorded in the interference pattern through amplitude and phase modulation of interference fringes; the invention records the model data of the outer contour of the original part through laser scanning, and can generate a photocuring effect in liquid photosensitive resin by utilizing a holographic imaging principle after data processing to rapidly shape the outer contour of the scanned part of the original part; in the rotation process of the original part, the outer contour is scanned gradually and completely, and finally, the whole outer contour of the original part is formed, so that the manufacturing time cost and the surface quality of the part are reduced, the integral consistency of the mechanical characteristics of the part is improved, and the part with the same shape as the part is manufactured quickly by using the existing part model.
Compared with other hologram recording modes, the method has higher information density, namely, more object information can be recorded in a smaller range; compared with the traditional method, the recording mode using the computer technology has higher speed, and reserves the possibility of modifying and perfecting the hologram for technicians; the invention uses two synchronous rotary tables to record and reproduce, and can complete the whole copying process in shorter time.
Drawings
FIG. 1 is a schematic diagram of a system in which the present invention may be implemented.
In the drawings, a 1-recording section, a 2-reproducing section, 11-first semiconductor laser, 12-first beam expander, 13-first half mirror, 14-total mirror, 15-second half mirror, 16-first fourier transform lens, 17-CCD camera, 18-first rotating stage, 21-second semiconductor laser, 22-second beam expander, 23-spatial light modulator, 24-second fourier transform lens, 25-second rotating stage.
Detailed Description
In optics, a hologram formed by interference of the fourier transform spectrum of an object light wave with a reference light is called a fourier transform hologram. By utilizing the Fourier transform property of the lens, an object is placed at the front focal plane of the lens, the Fourier transform spectrum of the object light wave can be obtained at the conjugate image plane of the illumination light source, then the reference light is introduced to interfere with the Fourier transform spectrum, and all information of the Fourier transform light field of the object light wave is recorded in the interference pattern through amplitude and phase modulation of interference fringes.
Referring to fig. 1, a fast hologram 3D copying apparatus based on fourier transform includes a recording section, a data processing section, and a reproducing section; the recording section 1 includes a recording section 1 including a first semiconductor laser 11, a first beam expander 12, a first half mirror 13, a total reflection mirror 14, a second half mirror 15, a first fourier transform lens 16, a CCD camera 17, and a first rotating stage 18, the first rotating stage 18 being for placing an object a to be scanned. The laser is emitted by the first semiconductor laser 11, is irradiated to the first half mirror 13 after being expanded by the first beam expander 12, and is divided into a first beam and a second beam by the first half mirror 13; the first light beam irradiates the surface of an object to be scanned placed on a first rotary platform 18 through a first half mirror 13, and reflected light of the surface of the object to be scanned irradiates a CCD camera 17 after being subjected to Fourier transform through a first Fourier transform lens 16; the second light beam irradiates the receiving surface of the CCD camera 17 after being reflected by the first half-reflecting mirror 13, the total reflecting mirror 14 and the second half-reflecting mirror 15, and interferes with the first light beam on the CCD camera 17; the CCD camera 17 receives all information generated by interference of two beams of light, the contour information of an object can be loaded on the spatial light modulator 23 after being processed by a computer, and the first rotary platform 18 rotates around the axis of the first rotary platform to drive the object to be scanned placed above the first rotary platform to rotate so as to scan all the contours of the object to be scanned.
The data processing section includes: the CCD camera 17 is connected to a computer via a data transmission line via an I/O interface, and the computer is connected to the spatial light modulator 23. The light intensity information recorded by the CCD camera in the recording section is transmitted to the computer via the data transmission line, and the information is transmitted to the spatial light modulator 23 in the reproducing section via the data transmission line after being processed by the computer.
The reproduction section 2 includes a second semiconductor laser 21, a second beam expander 22, a spatial light modulator 23, a second fourier transform lens 24, a second rotary stage 25 provided along the optical path, a container containing a photosensitive resin being provided on the second rotary stage 25; the laser is emitted by the second semiconductor laser 21, is irradiated on the spatial light modulator 23 after being expanded by the second beam expander 22, is projected to a container which is placed on the second rotary platform 25 and is filled with photosensitive resin after being subjected to inverse transformation by the second Fourier transform lens 24, and finally reproduces a holographic image of the outer contour of the part of the object to be scanned by the recording part; the photosensitive resin at the corresponding position in the container filled with the photosensitive resin is subjected to laser irradiation to generate a photocuring effect, the second rotary platform 25 synchronously rotates along with the first rotary platform 18, the outline of the object to be scanned is gradually scanned completely along with the rotation of the platform, and the whole outline of the scanned object is finally molded in the container filled with the photosensitive resin, so that a 3D printing structure of the object to be scanned is formed; as the platform rotates, the outer contour of a is gradually scanned completely, and the entire outer contour of a will be eventually formed in B, thereby forming a 3D printed structure of a.
Referring to fig. 1, the apparatus includes a recording section 1 and a reproducing section 2, the recording section 1 including a first semiconductor laser 11, a first beam expander 12, a first half mirror 13, a total reflection mirror 14, a second half mirror 15, a first fourier transform lens 16, a CCD camera 17, and a first rotary stage 18; light emitted from the first semiconductor laser 11 enters the first beam expander 12 to expand beams, and is divided into two paths through the first half mirror 13, wherein a first rotary platform 18, a first Fourier transform lens 16, a second half mirror 15 and a CCD camera 17 are sequentially arranged in a first optical path, and a total reflection mirror 14, a second half mirror 15 and the CCD camera 17 are sequentially arranged in a second optical path; the first rotary platform 18 is used for placing objects to be scanned;
the reproduction section 2 includes a second semiconductor laser 21, a second beam expander 22, a spatial light modulator 23, a second fourier transform lens 24, a second rotary stage 25 provided along the optical path, a container containing a photosensitive resin being provided on the second rotary stage 25;
the data processing part adopts a computer, and the CCD camera and the spatial light modulator 23 are connected with the computer through an I/O interface.
A recording section: the laser is emitted by the first semiconductor laser 11, is irradiated to the first half mirror 13 after being expanded by the first beam expander 12, and is divided into a first beam and a second beam by the first half mirror 13; the first light beam irradiates the surface of an object to be scanned placed on a first rotary platform 18 through a first half mirror 13, and reflected light of the surface of the object to be scanned irradiates a CCD camera 17 after being subjected to Fourier transform through a first Fourier transform lens 16; the second light beam irradiates the receiving surface of the CCD camera 17 after being reflected by the first half-reflecting mirror 13, the total reflecting mirror 14 and the second half-reflecting mirror 15, and interferes with the first light beam on the CCD camera 17; the CCD camera 17 receives all information generated by interference of two beams of light, the contour information of an object can be loaded on the spatial light modulator 23 after being processed by a computer, and the first rotary platform 18 rotates around the axis of the first rotary platform to drive the object to be scanned placed above the first rotary platform to rotate so as to scan all the contours of the object to be scanned;
a data processing section: the object spectrum information received by the CCD camera in the recording part is converted into gray information and is sent to the computer in the form of digital images. The computer may perform a filtering operation on the spectral image to enhance the image quality. Then according to the holographic imaging principle, the computer carries out linear transformation on the gray information and then displays the picture on the spatial light modulator. At this time, the spatial light modulator is set to an amplitude mode, and after the spatial light modulator receives a signal from the computer, a two-dimensional grating with a distribution of bright-dark staggering associated with the information of the object surface is written, that is, the information of the object surface is loaded on the spatial light modulator.
The reproduction section 2 includes a second semiconductor laser 21, a second beam expander 22, a spatial light modulator 23, a second fourier transform lens 24, a second rotary stage 25, and a container containing a photosensitive resin. The laser is emitted by the second semiconductor laser 21, is irradiated on the spatial light modulator 23 after being expanded by the second beam expander 22, is projected to a container which is placed on the second rotary platform 25 and is filled with photosensitive resin after being subjected to inverse transformation by the second Fourier transform lens 24, and finally reproduces a holographic image of the outer contour of the part of the object to be scanned by the recording part; the photosensitive resin at the corresponding position in the container filled with the photosensitive resin is cured and molded by the photo-curing effect after being irradiated by laser, the second rotary platform 25 synchronously rotates along with the first rotary platform 18, the outline of the object to be scanned is gradually scanned completely along with the rotation of the platform, and the whole outline of the scanned object is finally molded in the container filled with the photosensitive resin, so that the 3D printing structure of the object to be scanned is formed.
The first rotary platform 18 and the second rotary platform 25 adopt the same rotary driving mechanism, and the rotary input ends of the first rotary platform 18 and the second rotary platform 25 are connected with the output ends of the same rotary driving mechanism.
Of course, it is also possible to use rotation driving mechanisms which rotate synchronously with the same rotation speed and direction.
As a preferred embodiment, limit switches are arranged on the rotation paths of the first rotary platform 18 and the second rotary platform 25, and the limit switches are connected with the input end of the upper computer of the driving mechanism, so that the rotation can be effectively prevented from exceeding the scanning range, and the copying accuracy can be improved.
Claims (5)
1. The fast holographic 3D copying system based on Fourier transform is characterized by comprising a recording part (1) and a reproducing part (2), wherein the recording part (1) comprises a first semiconductor laser (11), a first beam expander (12), a first half mirror (13), a total reflection mirror (14), a second half mirror (15), a first Fourier transform lens (16), a CCD camera (17) and a first rotary platform (18); light emitted from a first semiconductor laser (11) enters a first beam expander (12) to expand beams, the beams are divided into two paths through a first half-mirror (13), a first rotary platform (18), a first Fourier transform lens (16), a second half-mirror (15) and a CCD camera (17) are sequentially arranged in a first optical path, and a total reflection mirror (14), the second half-mirror (15) and the CCD camera (17) are sequentially arranged in a second optical path; the first rotary platform (18) is used for placing objects to be scanned;
the reproduction section (2) comprises a second semiconductor laser (21), a second beam expander (22), a spatial light modulator (23), a second Fourier transform lens (24) and a second rotary stage (25) which are arranged along the optical path, wherein a container filled with photosensitive resin is arranged on the second rotary stage (25);
the CCD camera and the spatial light modulator (23) are connected with a computer through an I/O interface; the first semiconductor laser (11) and the second semiconductor laser (21) adopt the same semiconductor laser, the first Fourier transform lens (16) and the second Fourier transform lens (24) adopt the same Fourier transform lens, and the first half-mirror (13) and the second half-mirror (15) adopt the same half-mirror; the power of the laser is larger than 20mW, and the fundamental mode is Gaussian; the spatial light modulator adopts amplitude-phase mixed modulation, the resolution is larger than or equal to 1024×768, and the contrast is larger than or equal to 1000:1, the display speed is greater than or equal to 60Hz, and the spectrum range is greater than or equal to 400nm-700nm; the laser is emitted by a first semiconductor laser (11), is irradiated to a first half-reflecting mirror (13) after being expanded by a first beam expander (12), and is divided into a first beam and a second beam by the first half-reflecting mirror (13); the first light beam irradiates the surface of an object to be scanned placed on a first rotary platform (18) through a first half-mirror (13), and reflected light of the surface of the object to be scanned irradiates a CCD camera (17) after being subjected to Fourier transform through a first Fourier transform lens (16); the second light beam irradiates the receiving surface of the CCD camera (17) after being reflected by the first half-reflecting mirror (13), the total reflecting mirror (14) and the second half-reflecting mirror (15), and interferes with the first light beam on the CCD camera (17); the CCD camera (17) receives all information generated by interference of two beams of light, and contour information of an object is loaded on the spatial light modulator (23); the first rotary platform (18) rotates around the axis of the first rotary platform to drive an object to be scanned placed above the first rotary platform to rotate so as to scan the whole outline of the object to be scanned; the laser is emitted by a second semiconductor laser (21), is irradiated on a spatial light modulator (23) after being expanded by a second beam expander (22), is projected to a container which is placed on a second rotary platform (25) and is filled with photosensitive resin after being subjected to inverse transformation by a second Fourier transform lens (24), and finally reproduces a holographic image of the outer contour of the part of the object to be scanned, which is scanned by a recording part; the photosensitive resin is cured and formed after laser irradiation, the second rotary platform (25) synchronously rotates along with the first rotary platform (18), the outer contour of the object to be scanned is gradually scanned completely, and finally all the outer contours of the scanned object are formed, so that the structure of the object to be scanned is formed.
2. The fast fourier transform-based holographic 3D copy system of claim 1, wherein the first rotary stage (18) and the second rotary stage (25) are driven by a single rotary drive mechanism or the first rotary stage (18) and the second rotary stage (25) each employ a single rotary drive mechanism, and the two rotary drive mechanisms rotate in synchronization.
3. The fast fourier transform-based holographic 3D copy system of claim 1, wherein limit switches are provided on rotational paths of the first rotary stage (18) and the second rotary stage (25), the limit switches being connected to an input of a host computer of the drive mechanism.
4. The fast fourier transform-based holographic 3D copying system as defined in claim 1, wherein the first optical path, the second optical path, and the optical path of the reconstruction portion (2) are each provided with an anti-interference protective sleeve.
5. The fast fourier transform-based holographic 3D copying system as claimed in claim 1, wherein the outer sides of the recording portion (1) and the reproducing portion (2) are provided with dust covers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210655131.8A CN115071128B (en) | 2022-06-10 | 2022-06-10 | Fast holographic 3D copying method and system based on Fourier transform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210655131.8A CN115071128B (en) | 2022-06-10 | 2022-06-10 | Fast holographic 3D copying method and system based on Fourier transform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115071128A CN115071128A (en) | 2022-09-20 |
| CN115071128B true CN115071128B (en) | 2024-02-27 |
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| JPH06235620A (en) * | 1992-03-27 | 1994-08-23 | Shizuoka Univ | Real-time measuring apparatus for shape of phase |
| CN202034034U (en) * | 2010-11-01 | 2011-11-09 | 浙江师范大学 | Large field of view digital hologram recording device |
| CN105818383A (en) * | 2016-04-19 | 2016-08-03 | 西安交通大学 | Metamaterial light curing 3D printing method based on holographic optical tweezers |
| CN113655693A (en) * | 2021-07-08 | 2021-11-16 | 湖南大学 | Planar and three-dimensional micro-nano processing device based on liquid crystal spatial light modulator |
| WO2021247926A1 (en) * | 2020-06-03 | 2021-12-09 | Quadratic 3D, Inc. | Volumetric three-dimensional printing methods |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6963406B2 (en) * | 2002-09-03 | 2005-11-08 | Ut-Battelle, Llc | Fused off-axis object illumination direct-to-digital holography with a plurality of illumination sources |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06235620A (en) * | 1992-03-27 | 1994-08-23 | Shizuoka Univ | Real-time measuring apparatus for shape of phase |
| CN202034034U (en) * | 2010-11-01 | 2011-11-09 | 浙江师范大学 | Large field of view digital hologram recording device |
| CN105818383A (en) * | 2016-04-19 | 2016-08-03 | 西安交通大学 | Metamaterial light curing 3D printing method based on holographic optical tweezers |
| WO2021247926A1 (en) * | 2020-06-03 | 2021-12-09 | Quadratic 3D, Inc. | Volumetric three-dimensional printing methods |
| CN113655693A (en) * | 2021-07-08 | 2021-11-16 | 湖南大学 | Planar and three-dimensional micro-nano processing device based on liquid crystal spatial light modulator |
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