Optical system of 3D printing equipment and 3D printing equipment

Abstract

The utility model provides an optical system of 3D printing equipment and the 3D printing equipment, and relates to the field of 3D printing, the 3D printing equipment is provided with a release film, a base and an image acquisition device, a printing interval used for being filled with a printing material is formed between the release film and the base, and the optical system comprises a first light source used for emitting curing light for curing and forming the printing material; the second light source is used for emitting illumination light, and the wave band of the illumination light is the non-sensitive wave band of the printing material; the light path assembly is arranged on a projection light path of the curing light and the illumination light; the curing light can be projected to the printing interval after passing through the light path assembly, and the illumination light can irradiate the release film, the base and the printing interval after passing through the light path assembly; reflection light formed by reflection of the illumination light through the release film, the base or the forming layer in the printing interval can be projected to the image acquisition device through the light path assembly. According to the application, the equipment debugging difficulty can be reduced, and the debugging precision, the alignment precision and the product monitoring real-time performance are improved.

Description

Technical Field

[0001] This application relates to the field of 3D printing, and particularly to an optical system of a 3D printing device and a 3D printing device. Background Art

[0002] A 3D printing device is a device that constructs an object by stacking materials layer by layer, capable of producing complex geometric shapes and supporting the use of multiple materials. During 3D printing, there are requirements such as equipment debugging and curing light alignment. Existing devices usually perform the above operations manually and rely on experience, but the debugging and alignment are difficult and the accuracy is poor, which cannot meet the printing requirements of high-precision products. Utility Model Content

[0003] This application provides an optical system of a 3D printing device and a 3D printing device, which can significantly reduce the difficulty of equipment debugging and improve the debugging accuracy, alignment accuracy, and real-time monitoring of products.

[0004] On the one hand, this application provides an optical system of a 3D printing device. The 3D printing device is provided with a release film, a base, and an image acquisition device. A printing interval for filling printing materials is formed between the release film and the base. The optical system includes:

[0005] A first light source for emitting curing light that cures the printing material into a formed shape;

[0006] A second light source for emitting illumination light, and the wavelength band of the illumination light is the non-sensitive wavelength band of the printing material;

[0007] An optical path component disposed on the projection optical paths of the curing light and the illumination light; the curing light can be projected onto the printing interval after passing through the optical path component, and the illumination light can irradiate the release film, the base, and the printing interval after passing through the optical path component; the reflected light formed by the reflection of the illumination light by the release film, the base, or the formed layer in the printing interval can be projected onto the image acquisition device through the optical path component.

[0008] In a possible implementation manner, the reflected light of the curing light can be projected onto the image acquisition device through the optical path component.

[0009] In a possible implementation manner, the reflected light of the illumination light and / or the curing light is coaxial with the image acquisition device.

[0010] In a possible implementation manner, the curing light and the illumination light can be combined into a beam after passing through the optical path component.

[0011] In a possible implementation manner, the optical path component includes a first lens group, a beam combining component, and a processing lens group;

[0012] The solidifying light can be projected onto the printing space after passing through the beam combining assembly and the processing lens group;

[0013] The illuminating light can be projected onto the release film, the base, and the printing space after passing through the beam combining assembly and the processing lens group;

[0014] The reflected light of the illuminating light can be projected onto the image acquisition device after passing through the processing lens group, the beam combining assembly, and the first lens group.

[0015] In a possible implementation, the beam combining assembly includes a second lens group and a first beam splitting assembly, and the solidifying light can be projected onto the processing lens group after passing through the second lens group and the first beam splitting assembly;

[0016] The reflected light of the solidifying light can be projected onto the image acquisition device after passing through the processing lens group, the first beam splitting assembly, and the first lens group.

[0017] In a possible implementation, the beam combining assembly further includes a third lens group and a second beam splitting assembly, and the illuminating light can be projected onto the processing lens group after passing through the third lens group and the second beam splitting assembly;

[0018] The reflected light of the illuminating light can be projected onto the image acquisition device after passing through the processing lens group, the first beam splitting assembly, the second beam splitting assembly, and the first lens group.

[0019] In a possible implementation, the beam combining assembly includes a beam combining component, a fourth lens group, and a third beam splitting assembly, and the illuminating light and the solidifying light can be combined after passing through the beam combining component;

[0020] The illuminating light and / or the solidifying light can be projected onto the processing lens group after passing through the beam combining component, the fourth lens group, and the third beam splitting assembly;

[0021] The reflected light of the illuminating light and / or the solidifying light can be projected onto the image acquisition device after passing through the processing lens group, the third beam splitting assembly, and the first lens group.

[0022] In a possible implementation, the first lens group, the beam combining assembly, and the processing lens group are coaxially arranged.

[0023] On the other hand, a 3D printing device is provided. The 3D printing device is provided with a release film, a base, an image acquisition device, and the optical system as described above. A printing space for filling printing material is formed between the release film and the base.

[0024] The optical system of the 3D printing device and the 3D printing device provided by this application have at least the following technical effects:

[0025] The optical system of this application is provided with a first light source for emitting curing light, a second light source for emitting illumination light, and an optical path component. The illumination light is set to be a non-sensitive band of the printing material to avoid the influence on the printing material during illumination and the optical crosstalk on the cured printing. The curing light can be projected onto the printing interval after passing through the optical path component to achieve the plastic curing of the filling material. The illumination light can irradiate the release film, the base, and the printing interval after passing through the optical path component. Moreover, the reflected light formed by the reflection of the illumination light by the release film, the base, or the formed layer in the printing interval can be projected onto the image acquisition device through the optical path component, so that the characteristics of the release film, the base, or the formed layer carried by the reflected light are imaged and displayed, facilitating operations such as automatic debugging, curing light alignment, and real-time monitoring of the formed layer structure by combining illumination and image acquisition, significantly reducing the equipment debugging difficulty, and improving the debugging accuracy, alignment accuracy, and real-time product monitoring.

[0026] It can be understood that some of the additional aspects and advantages of this application will be given in the following description, some will become obvious from the following description, or will be learned through the practice of this application. Description of the Drawings

[0027] To more clearly illustrate the technical solutions and advantages in the embodiments of this application or the prior art, the drawings required for use in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of an optical system of a 3D printing device provided by an embodiment of this application;

[0029] Figure 2 It is a schematic structural diagram of another optical system of a 3D printing device provided by an embodiment of this application;

[0030] Figure 3 It is a schematic structural diagram of another optical system of a 3D printing device provided by an embodiment of this application;

[0031] Description of the Drawings: 100 - First light source, 200 - Second light source, 310 - First lens group, 320 - Beam combining assembly, 330 - Processing lens group, 321 - Second lens group, 322 - Third lens group, 323 - Fourth lens group, 324 - First beam splitting assembly, 325 - Second beam splitting assembly, 326 - Third beam splitting assembly, 327 - Beam combining assembly, 11 - Image acquisition device, 12 - Release film, 13 - Base, 14 - Printing interval. Detailed Description of the Invention

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0034] The following is an introduction to an optical system of a 3D printing device provided by an embodiment of the present application. The 3D printing device is provided with a release film 12, a base 13, and an image acquisition device 11. A printing interval 14 for filling printing material is formed between the release film 12 and the base 13. Figures 1 - 3 Specifically, referring to

[0035] Specifically, referring to Figure 1 , the release film 12 is located above the base 13. The printing material refers to a liquid material that can react under the action of curing light to form a cured layer, such as resin. The release film 12 is used to provide a flat and stable printing surface, which helps to obtain a better printing effect. The printing interval 14 refers to the space formed between the surface of the release film 12 and the base 13, or the space formed between the surface of the release film 12 and the surface of the formed layer on the base 13. The formed layer refers to the material that has been cured and formed. During 3D printing operations, the layer thickness is controlled by controlling the height of the printing interval 14 to be filled, and the printing material is filled in the printing interval 14 and cured layer by layer through light curing. The release film 12 can transmit curing light and illumination light.

[0036] Referring to Figure 1, the optical system includes: a first light source 100 for emitting curing light to cure and form the printing material; a second light source for emitting illumination light; an optical path component disposed on the projection optical paths of the curing light and the illumination light; the curing light can be projected onto the printing space 14 after passing through the optical path component, and the illumination light can irradiate the release film 12, the base 13, and the printing space 14 after passing through the optical path component; the reflected light formed by the reflection of the illumination light by the release film 12, the base 13, or the formed layer in the printing space 14 can be projected onto the image acquisition device 11 through the optical path component.

[0037] Specifically, the wavelength band of the illumination light is the non-sensitive wavelength band of the printing material, such as yellow light. The optical path component is used to collimate, adjust the focal plane, and project the curing light and the illumination light, and project the reflected light of the curing light and / or the illumination light onto the image acquisition device 11. It can be understood that the reflected light of the illumination light carries the structural features of the illuminated area, and the structural features can be displayed in the image after being imaged by the image acquisition device 11. More specifically, through the optical path component, the pattern to be printed carried by the curing light can be projected onto the surface of the base 13 or the surface of the release film 12. Combining the illumination of the base 13 or the release film 12 by the illumination light, imaging of the base 13, the release film 12, and the pattern to be printed is performed. According to the surface structure image of the base 13 and the image clarity of the pattern to be printed, operations such as leveling the base 13 or aligning it with the pattern to be printed can be achieved. According to the structural image of the release film 12 and the image clarity of the pattern to be printed, operations such as leveling the release film 12 or aligning it with the pattern to be printed can be achieved; alternatively, after filling the printing material, the pattern to be printed by the curing light can be projected into the printing space 14 to focus and cure the printing material to achieve layer-by-layer printing; or, the curing light can be turned off and the illumination light can be turned on to monitor the product structure through the imaging of the formed layer, and printing errors can be detected in a timely manner.

[0038] In summary, the optical system of the present application is provided with a first light source 100 for emitting curing light, a second light source for emitting illumination light, and an optical path component, and the illumination light is set to be the non-sensitive wavelength band of the printing material to avoid the influence on the printing material during illumination and the optical crosstalk on the cured printing; the curing light can be projected onto the printing space 14 after passing through the optical path component to achieve the plastic curing of the filling material, the illumination light can irradiate the release film 12, the base 13, and the printing space 14 after passing through the optical path component, and the reflected light formed by the reflection of the illumination light by the release film 12, the base 13, or the formed layer in the printing space 14 can be projected onto the image acquisition device 11 through the optical path component, so that the features of the release film 12, the base 13, or the formed layer carried by the reflected light are imaged and displayed, facilitating operations such as automatic debugging, curing light alignment, and real-time monitoring of the formed layer structure by combining illumination and image acquisition, significantly reducing the equipment debugging difficulty, and improving the debugging accuracy, alignment accuracy, and product monitoring real-time performance.

[0039] In some embodiments, the reflected light of the curing light can be projected onto the image acquisition device 11 through the optical path assembly, so that the image acquisition device 11 can clearly image the pattern to be printed based on the reflected light of the curing light, ensuring the contour clarity and imaging accuracy of the pattern to be printed, and further improving the debugging and alignment accuracy.

[0040] In some embodiments, the reflected light of the illumination light and / or the curing light is coaxial with the image acquisition device 11 to reduce the imaging influence of problems such as imaging distortion on the release film 12, the base 13, the formed layer or the pattern to be printed, and ensure the accuracy of image analysis.

[0041] In some embodiments, the curing light and the illumination light can be combined after passing through the optical path assembly, making the optical axis of the illumination light converge with the optical axis of the curing light, improving the illumination effect of the illumination light on the projection area of the curing light, and further improving the debugging and alignment effect based on the curing light.

[0042] Based on some or all of the above embodiments, in some embodiments, refer to Figure 1 , the optical path assembly includes a first lens group 310, a beam combining assembly 320, and a processing lens group 330; the curing light can be projected onto the printing interval 14 after passing through the beam combining assembly 320 and the processing lens group 330 for material curing; the illumination light can be projected onto the release film 12, the base 13, and the printing interval 14 after passing through the beam combining assembly 320 and the processing lens group 330 to illuminate the printing area. The beam combining assembly can adjust the projection direction, focal plane position, etc. of the curing light and the illumination light, so that they are projected onto the processing lens group 330, and then projected onto the printing interval 14, the base 13 or the release film 12.

[0043] Specifically, the reflected light of the illumination light can be projected onto the image acquisition device 11 after passing through the processing lens group 330, the beam combining assembly 320, and the first lens group 310. The beam combining assembly can transmit the reflected light of the illumination light and form an image after being adjusted by the first lens group 310. The first lens group 310 can improve the field brightness of the image acquisition device 11 and optimize the imaging clarity and accuracy.

[0044] In a preferred embodiment, the first lens group 310, the beam combining assembly 320, and the processing lens group 330 are arranged coaxially to improve the accuracy of the projection positions of the illumination light and the curing light, and the imaging accuracy.

[0045] In some embodiments, the integrated beam assembly 320 includes a second lens group 321 and a first beam splitting assembly 324. The curing light can be projected onto the processing lens group 330 after passing through the second lens group 321 and the first beam splitting assembly 324. The reflected light of the curing light can be projected onto the image acquisition device 11 after passing through the processing lens group 330, the first beam splitting assembly 324, and the first lens group 310. The second lens group 321 and the first beam splitting assembly 324 are sequentially arranged on the optical path between the first light source 100 and the processing lens group 330, and are used for processing and projecting the curing light. The processing lens group 330, the first beam splitting assembly 324, and the first lens group 310 are sequentially arranged on the optical path between the release film 12 and the image acquisition device 11. Through the light processing of the second lens group 321, the stability and imaging clarity of the curing light can be improved. The first beam splitting assembly 324 can reflect the curing light to the processing lens group 330 and transmit the reflected light of the curing light to form an image in the image acquisition device 11. Alternatively, the first beam splitting assembly 324 can transmit the curing light to the processing lens group 330 and reflect the reflected light of the curing light to form an image in the image acquisition device 11.

[0046] In a preferred embodiment, the second lens group 321, the first beam splitting assembly 324, and the processing lens group 330 are coaxially arranged, and the first lens group 310, the first beam splitting assembly 324, and the processing lens group 330 are coaxially arranged.

[0047] In some embodiments, referring to Figure 2 , the integrated beam assembly 320 further includes a third lens group 322 and a second beam splitting assembly 325. The illumination light can be projected onto the processing lens group 330 after passing through the third lens group 322 and the second beam splitting assembly 325; the reflected light of the illumination light can be projected onto the image acquisition device 11 after passing through the processing lens group 330, the first beam splitting assembly 324, the second beam splitting assembly 325, and the first lens group 310. The third lens group 322 and the second beam splitting assembly 325 are sequentially arranged on the optical path between the second light source and the processing lens group 330, and are used for processing and projecting the illumination light. The processing lens group 330, the first beam splitting assembly 324, the second beam splitting assembly 325, and the first lens group 310 are arranged on the optical path between the release film 12 and the image acquisition device 11. The second beam splitting assembly 325 can reflect the illumination light and transmit the reflected light of the illumination light (as Figure 2 shown), or can transmit the illumination light and reflect the reflected light of the illumination light (not shown). The first beam splitting assembly 324 can also project the reflected light of the illumination light so that it is received by the image acquisition device 11 through the first lens group 310. It can be understood that the first beam splitting assembly 324 can be arranged on the optical path between the second beam splitting assembly 325 and the first lens group 310 (not shown), or the second beam splitting assembly 325 can be arranged on the optical path between the first beam splitting assembly 324 and the first lens group 310 (as Figure 2As shown). Through the light processing of the third lens group 322, the stability of the illumination light and the imaging clarity can be improved. The second beam splitting component 325 can project the illumination light onto the processing lens group 330 and project the reflected light of the illumination light onto the image acquisition device 11 for imaging, realizing the equipment debugging and alignment of combined illumination light illumination imaging.

[0048] In the preferred embodiment, the third lens group 322, the second beam splitting component 325, and the processing lens group 330 are coaxially arranged, and the first lens group 310, the first beam splitting component 324, the second beam splitting component 325, and the processing lens group 330 are coaxially arranged.

[0049] In some embodiments, referring to Figure 3 , the beam combining assembly 320 includes a beam combining component 327, a fourth lens group, and a third beam splitting component 326. The illumination light and the curing light can be combined after passing through the beam combining component 327; the illumination light and / or the curing light can be projected onto the processing lens group 330 through the beam combining component 327, the fourth lens group, and the third beam splitting component 326; the reflected light of the illumination light and / or the curing light can be projected onto the image acquisition device 11 after passing through the processing lens group 330, the third beam splitting component 326, and the first lens group 310. The beam combining component 327, the fourth lens group, and the third beam splitting component 326 are arranged on the optical path between the first light source 100 and the processing lens group 330, and on the optical path between the second light source and the processing lens group 330; the processing lens group 330, the third beam splitting component 326, and the first lens group 310 are arranged on the optical path between the release film 12 and the image acquisition device 11. The beam combining component 327 can transmit the curing light and reflect the illumination light (as Figure 3 shown), or can transmit the illumination light and reflect the curing light (not shown). The third beam splitting component 326 can reflect the curing light and / or the guiding light and transmit the reflected light of the curing light and / or the guiding light (as Figure 3 shown), or the third beam splitting component 326 can transmit the curing light and / or the guiding light and reflect the reflected light of the curing light and / or the guiding light (not shown). By setting the beam combining component 327, the combination of the illumination light and the curing light is realized, and the light is processed by the fourth lens group to improve the stability of the illumination light and the curing light and the pattern clarity, and then the light is projected onto the processing lens through the third beam splitting component 326, and the reflected light of the illumination light and the curing light is projected to form an image in the image acquisition device 11.

[0050] The present application also provides a 3D printing device, which is provided with a release film 12, a base 13, an image acquisition device 11, and the optical system as described above. A printing interval 14 for filling printing material is formed between the release film 12 and the base 13.

[0051] In some embodiments, the image acquisition device 11 can image based on the reflected light of the illumination light and the reflected light of the curing light. Through the imaging of the pattern to be printed carried by the curing light and the base 13 and the release film 12, the alignment adjustment of the curing light can be achieved, and through the imaging of the illumination light and the curing light on the surface of the forming film or the forming base, the surface flatness of the forming film and the forming base can be adjusted based on the imaging clarity of the pattern to be printed to meet the leveling requirements. In addition, by illuminating the forming layer with the illumination light and imaging, the curing effect and shape of the forming layer can be monitored in real time, and printing defects and errors can be detected in a timely manner.

[0052] It should be noted that: the above-mentioned sequence of the embodiments of the present application is only for description and does not represent the superiority or inferiority of the embodiments. And the above-mentioned specific embodiments of the present application have been described. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order from that in the embodiments and still achieve the desired results. Additionally, the processes depicted in the drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0053] The various embodiments in the present application are described in a progressive manner. The same or similar parts among the various embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments. In particular, for the device, equipment, and storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiments.

[0054] Those of ordinary skill in the art can understand that all or part of the steps to implement the above embodiments can be completed by hardware, or can be completed by a program instructing relevant hardware. The program can be stored in a computer-readable storage medium. The above-mentioned storage medium can be a read-only memory, a magnetic disk, an optical disk, etc.

[0055] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An optical system of a 3D printing device, the 3D printing device being provided with a release film (12), a base (13) and an image acquisition device (11), a printing interval (14) for filling a printing material being formed between the release film (12) and the base (13), characterized in that, The optical system includes: A first light source (100) for emitting curing light to cure and form the printing material; A second light source (200) for emitting illumination light, and the wavelength band of the illumination light is the non-sensitive wavelength band of the printing material; An optical path assembly disposed on the projection optical paths of the curing light and the illumination light; the curing light can be projected onto the printing interval (14) after passing through the optical path assembly, and the illumination light can irradiate the release film (12), the base (13), and the printing interval (14) after passing through the optical path assembly; the reflected light formed by the reflection of the illumination light by the release film (12), the base (13), or the formed layer in the printing interval (14) can be projected onto the image acquisition device (11) through the optical path assembly.

2. The optical system according to claim 1, wherein The reflected light of the curing light can be projected onto the image acquisition device (11) through the optical path assembly.

3. The optical system according to claim 1, characterized in that, The reflected light of the illumination light and / or the curing light is coaxial with the image acquisition device (11).

4. The optical system according to claim 1, characterized in that, The curing light and the illumination light can be combined into a beam after passing through the optical path assembly.

5. The optical system according to any one of claims 1 to 4, characterized in that, The optical path assembly includes a first lens group (310), a beam combining assembly (320), and a processing lens group (330); The curing light can be projected onto the printing interval (14) after passing through the beam combining assembly (320) and the processing lens group (330); The illumination light can be projected onto the release film (12), the base (13), and the printing interval (14) after passing through the beam combining assembly (320) and the processing lens group (330); The reflected light of the illumination light can be projected onto the image acquisition device (11) through the processing lens group (330), the beam combining assembly (320), and the first lens group (310).

6. The optical system according to claim 5, characterized in that, The beam combining assembly (320) includes a second lens group (321) and a first beam splitting assembly (324), and the curing light can be projected onto the processing lens group (330) after passing through the second lens group (321) and the first beam splitting assembly (324); The reflected light of the curing light can be projected onto the image acquisition device (11) through the processing lens group (330), the first beam splitting assembly (324), and the first lens group (310).

7. The optical system according to claim 6, wherein The beam combining assembly (320) further includes a third lens group (322) and a second beam splitting assembly (325), and the illumination light can be projected onto the processing lens group (330) after passing through the third lens group (322) and the second beam splitting assembly (325); The reflected light of the illumination light can be projected onto the image acquisition device (11) through the processing lens group (330), the first beam splitting assembly (324), the second beam splitting assembly (325), and the first lens group (310).

8. The optical system according to claim 5, wherein The beam combining assembly (320) includes a beam combining component (327), a fourth lens group (323), and a third beam splitting assembly (326), and the illumination light and the curing light can be combined into a beam after passing through the beam combining component (327); The illumination light and / or the curing light can be projected onto the processing lens group (330) through the beam combining assembly (327), the fourth lens group (323), and the third beam splitting assembly (326); The reflected light of the illumination light and / or the curing light can be projected onto the image acquisition device (11) after passing through the processing lens group (330), the third beam splitting assembly (326), and the first lens group (310).

9. The optical system according to claim 5, wherein The first lens group (310), the beam shaping assembly (320), and the processing lens group (330) are arranged coaxially.

10. A 3D printing device, characterized in that, The 3D printing device is provided with a release film (12), a base (13), an image acquisition device (11), and an optical system according to any one of claims 1-9. A printing interval (14) for filling printing material is formed between the release film (12) and the base (13).

Images