Projection device with honeycomb lens and 3D printer

Abstract

The utility model discloses a projection device with a honeycomb type lens and a 3D printer. The projection device comprises a substrate, an optical support, a honeycomb type collimating lens group and an LCD screen. A plurality of UV lamp beads are arranged on the surface of the substrate; the optical support is arranged above the side, provided with the UV lamp beads, of the substrate. The honeycomb type collimating lens group is formed by arranging a plurality of lenses in a matrix honeycomb type, and the honeycomb type collimating lens group is arranged in the optical bracket; the multiple UV lamp beads are arranged in a matrix honeycomb mode, and the UV lamp beads correspond to the lenses in position in a one-to-one mode. The LCD screen is arranged above the side, provided with the lens, of the optical support. The projection device provided by the utility model can obtain grid-free parallel light and realize high-precision printing.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and more specifically to a projection device with a honeycomb lens and a 3D printer. Background Art

[0002] At present, there are three types of photocuring 3D printers, including SLA, DLP, LCD and other technology molding machines. The method used in SLA technology is to irradiate photosensitive resin with laser. This method uses laser G code, scans each model layer from point to line one by one, and then irradiates the photosensitive resin with laser fast laser. The light source used in DLP technology comes from the projector. The projector irradiates the model part as a flat image into the resin solution for solidification. Using this method, the surface is formed at one time, and the printing time depends only on the height of the object to be printed. LCD technology photocuring 3D printer has the advantages of high precision and low equipment price.

[0003] The lenses currently used in LCD technology light-curing 3D printers are spliced ​​lenses. There are splicing seams at the joints of the lenses, which will result in grid-like bright or dark spots, resulting in low consistency and uniformity of the overall light spots. Uneven light energy will lead to low precision and inability to achieve fast printing, resulting in low printing efficiency and high cost.

[0004] Therefore, it is an urgent problem for those skilled in the art to develop a projection device and a 3D printer with a honeycomb lens that can form grid-free parallel light and achieve high-precision printing. Utility Model Content

[0005] In view of this, the utility model provides a projection device and a 3D printer with a honeycomb lens which can form grid-free parallel light and realize high-precision printing.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A projection device with a honeycomb lens, comprising:

[0008] A substrate, a surface of which is provided with a plurality of UV lamp beads;

[0009] An optical bracket, the optical bracket is arranged above a side of the substrate where the UV lamp beads are arranged;

[0010] A honeycomb collimating lens group, wherein the honeycomb collimating lens group is composed of a plurality of lenses arranged in a matrix honeycomb pattern, and the honeycomb collimating lens group is disposed in the optical bracket; a plurality of UV lamp beads are arranged in a matrix honeycomb pattern, and the positions of the UV lamp beads and the lenses correspond one to one;

[0011] An LCD screen is arranged above a side of the optical bracket where the lens is arranged.

[0012] The beneficial effect of adopting the above technical solution is that in the utility model, multiple lenses are spliced ​​into a honeycomb shape, and parallel light without grid phenomenon can be obtained. The parallel light passes through the LCD screen to solidify the corresponding image product, and high-precision solidification can be achieved.

[0013] Preferably, the bottom of the optical bracket is provided with a plurality of light-transmitting holes, which correspond to the positions of the lens and UV lamp beads. The light emitted by the UV lamp beads can eliminate stray light through the light-transmitting holes, and at the same time, each UV lamp bead can independently and accurately project ultraviolet light to cure the photosensitive resin through the high-resolution LCD screen.

[0014] Preferably, a heat sink is provided on the side of the substrate away from the UV lamp beads, and the heat sink is in close contact with the substrate. The heat sink can dissipate heat from the UV lamp beads to ensure that the UV lamp beads can work normally below 65°C.

[0015] Preferably, a support is provided on one side of the heat sink close to the optical support, and the support is connected to the optical support. The support can limit the positions of the optical support and the heat sink.

[0016] Preferably, the wavelength of the UV lamp beads is 365nm to 405nm.

[0017] Preferably, the lens is polygonal.

[0018] Preferably, the focal length of the honeycomb collimating lens group is 15 mm. The utility model can achieve an ultra-short focal length, effectively reducing the size of the device. It solves the problem of high machine cost and high transportation cost caused by the long optical path focal length and large device size, thereby realizing a low-cost and high-value ultra-thin parallel light source.

[0019] Preferably, the substrate is an aluminum substrate or a copper substrate.

[0020] A 3D printer comprises the projection device with a honeycomb lens.

[0021] It can be seen from the above technical solutions that, compared with the prior art, the utility model discloses a projection device and a 3D printer with a honeycomb lens, and the beneficial effects thereof are:

[0022] (1) In the utility model, ultraviolet light passes through the honeycomb collimating lens group, and parallel light without grid phenomenon can be obtained at a 1-degree luminous angle, which can improve the accuracy of imaging and achieve high-precision curing of image products;

[0023] (2) The light spot formed by the ultraviolet light passing through the honeycomb collimating lens group in the utility model has high consistency, uniformity and precision, and can achieve fast printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0025] Figure 1 The accompanying drawing is a schematic diagram of the structure of the projection device provided by the utility model;

[0026] Figure 2 The accompanying drawing is a front view of the projection device provided by the utility model;

[0027] Figure 3 The accompanying drawing is a structural schematic diagram of the back side of the optical bracket provided by the utility model;

[0028] Figure 4 The accompanying drawing is a rear view of the optical bracket provided by the utility model;

[0029] Figure 5 The accompanying drawing is a top view of the honeycomb collimating lens group provided by the utility model.

[0030] Among them, in the figure,

[0031] 1-substrate; 2-UV lamp beads;

[0032] 3- Optical bracket;

[0033] 31-light transmission hole;

[0034] 4- Honeycomb collimating lens group;

[0035] 41- Lens;

[0036] 5-LCD screen; 6-heat sink; 7-support. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] The utility model discloses a projection device with a honeycomb lens, comprising:

[0039] A substrate 1, a surface of which is provided with a plurality of UV lamp beads 2;

[0040] An optical bracket 3, the optical bracket 3 is arranged above a side of the substrate 1 where the UV lamp beads 2 are arranged;

[0041] The lens 4, the honeycomb collimating lens group 4 is composed of a plurality of lenses 41 arranged in a matrix honeycomb pattern, and the honeycomb collimating lens group 4 is disposed in the optical bracket 3; the plurality of UV ultraviolet lamp beads 2 are arranged in a matrix honeycomb pattern, and the positions of the UV ultraviolet lamp beads 2 and the lenses 41 correspond one to one;

[0042] The LCD screen 5 is arranged above the side of the optical bracket 3 where the lens 41 is arranged.

[0043] In order to further optimize the above technical solution, a plurality of light-transmitting holes 31 are provided at the bottom of the optical bracket 3 , and the light-transmitting holes 31 correspond to the positions of the lenses 41 and the UV lamp beads 2 one by one.

[0044] In order to further optimize the above technical solution, a heat sink 6 is provided on the side of the substrate 1 away from the UV lamp beads 2, and the heat sink 6 is closely attached to the substrate 1. The heat sink 6 can ensure the normal operation of the UV lamp beads 2 on the substrate 1.

[0045] In order to further optimize the above technical solution, a support 7 is provided on one side of the heat sink 6 close to the optical support 3 , and the support 7 is connected to the optical support 3 .

[0046] In order to further optimize the above technical solution, the wavelength of the UV lamp bead 2 is 365nm~405nm.

[0047] In order to further optimize the above technical solution, the lens 41 is a polygon. Figure 5 As shown, it can be a hexagon.

[0048] In order to further optimize the above technical solution, the focal length of the honeycomb collimating lens group 4 is at least 15 mm. The focal length is the distance between the LCD screen 5 and the substrate 1, which achieves an ultra-short focal length and can reduce the size of the device.

[0049] In order to further optimize the above technical solution, the substrate 1 is an aluminum substrate or a copper substrate.

[0050] A 3D printer comprises a projection device having a honeycomb lens.

[0051] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0052] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A projection device having a honeycomb lens, characterized in that: include: A substrate (1), wherein a plurality of UV lamp beads (2) are arranged on the surface of the substrate (1); An optical bracket (3), the optical bracket (3) being arranged above a side of the substrate (1) on which the UV lamp beads (2) are arranged; A honeycomb collimating lens group (4), wherein the honeycomb collimating lens group (4) is composed of a plurality of lenses (41) arranged in a matrix honeycomb pattern, and the honeycomb collimating lens group (4) is disposed in the optical bracket (3); The plurality of UV lamp beads (2) are arranged in a matrix honeycomb pattern, and the positions of the UV lamp beads (2) and the lenses (41) correspond one to one; An LCD screen (5), wherein the LCD screen (5) is arranged above a side of the optical bracket (3) on which the lens (41) is arranged.

2. A projection device with a honeycomb lens according to claim 1, characterized in that: The bottom of the optical bracket (3) is provided with a plurality of light-transmitting holes (31), and the positions of the light-transmitting holes (31) correspond one-to-one to the positions of the lenses (41) and the UV lamp beads (2).

3. A projection device with a honeycomb lens according to claim 2, characterized in that: A heat sink (6) is provided on a side of the substrate (1) away from the UV lamp bead (2), and the heat sink (6) is in close contact with the substrate (1).

4. A projection device with a honeycomb lens according to claim 3, characterized in that: A support (7) is provided on one side of the heat sink (6) close to the optical support (3), and the support (7) is connected to the optical support (3).

5. The projection device with a honeycomb lens according to claim 1, characterized in that: The wavelength of the UV lamp bead (2) is 365nm-405nm.

6. The projection device with a honeycomb lens according to claim 1, characterized in that: The lens (41) is polygonal.

7. The projection device with a honeycomb lens according to claim 1, characterized in that: The focal length of the honeycomb collimating lens group (4) is 15 mm.

8. The projection device with a honeycomb lens according to claim 1, characterized in that: The substrate (1) is an aluminum substrate or a copper substrate.

9. A 3D printer, characterized in that: A projection device comprising a honeycomb lens as described in any one of claims 1 to 8.

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