Exposure machine

Abstract

The present invention discloses an exposure machine comprising a quantum dot LED screen and an image intensifier. The quantum dot LED screen has a light-emitting surface, which faces the image intensifier so that light emitted by the quantum dot LED screen is irradiated into the image intensifier. The image intensifier is configured to irradiate the light onto the image surface. The present invention can achieve a uniform light intensity distribution in the resulting image.

Description

Technical Field

[0001] The present invention relates to the field of exposure technology, and in particular to an exposure machine. Background Art

[0002] An exposure machine is a device that transfers image information from film or other transparent materials to a surface coated with a photosensitive material. It is also a core component of stereolithography 3D printing. Currently, the image modulators in most exposure machines are non-luminous and require a light source for operation. However, each light-emitting unit in a typical self-luminous image modulator has a wide beam angle, resulting in an uneven light intensity directly entering the lens, with higher intensity in the center and lower intensity at the edges.

[0003] The disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the present invention. It does not necessarily belong to the prior art of the present invention. In the absence of clear evidence that the above content has been disclosed on the application date of the present invention, the above background technology should not be used to evaluate the novelty and creativity of the present invention. Summary of the Invention

[0004] The present invention provides an exposure machine which can make the light intensity distribution of the formed image uniform.

[0005] An exposure machine includes a quantum dot LED screen and an image intensifier;

[0006] The quantum dot LED screen has a light-emitting surface;

[0007] The light emitting surface faces the image intensifier so as to irradiate the light emitted by the quantum dot LED screen into the image intensifier;

[0008] The image intensifier is used to irradiate light onto an image plane.

[0009] In some preferred embodiments, an imaging lens is further included; the imaging lens is arranged between the image intensifier and the image plane.

[0010] In some preferred embodiments, the image intensifier has a set numerical aperture for making the intensity of light emitted from the imaging lens uniform.

[0011] In some preferred embodiments, the image intensifier has a numerical aperture.

[0012] In some preferred embodiments, the image intensifier is in the form of a fiber optic image intensifier.

[0013] In some preferred embodiments, the fiber optic image intensifier comprises an optical fiber; the optical fiber has a set numerical aperture for making the intensity of light emitted from the image intensifier uniform.

[0014] In some preferred embodiments, the imaging lens is a lens that can reduce the size of an object image.

[0015] In some preferred embodiments, the image intensifier has a light emitting surface; the imaging lens has a light receiving surface and a light emitting surface; there is a specified distance between the light receiving surface of the imaging lens and the light emitting surface of the image intensifier; there is a specified distance between the light emitting surface of the imaging lens and the image plane.

[0016] In some preferred embodiments, the quantum dot LED screen is a device that serves as a light source and a spatial light modulator.

[0017] In some preferred embodiments, the light emitting surface is attached to the image intensifier.

[0018] In some preferred embodiments, the imaging lens is attached to the image intensifier to collect as much light as possible emitted from the image intensifier.

[0019] In some preferred embodiments, the quantum dot LED screen includes:

[0020] substrate;

[0021] an electrode disposed on the substrate;

[0022] Particles disposed on the electrode and capable of being driven by the electrode to emit light;

[0023] In some preferred embodiments, the particles are nanoparticles.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The quantum dot LED screen emits light through evenly distributed quantum dots; the light emitted by the quantum dot LED screen enters the image intensifier set up with the light-emitting surface of the quantum dot LED screen, and is received by the image intensifier as much as possible. The light emitted in the middle and the light emitted around the quantum dot LED screen can basically be received by the image intensifier; in this way, the intensity of the light emitted from the image intensifier has good uniformity, so that the light intensity distribution of the subsequent image is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a quantum dot LED screen according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic structural diagram of an exposure machine according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic structural diagram of a variant of an exposure machine according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic structural diagram of another variant of an exposure machine according to an embodiment of the present invention;

[0030] Figure 5 1 is a schematic structural diagram of a third variant of an exposure machine according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic structural diagram of a fourth variant of an exposure machine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention more clear, the following Figures 1 to 6 It should be understood that the specific embodiments described herein are only used to illustrate the present invention and are not intended to limit the present invention.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the term "connected" can be used for both fixing and circuit connection.

[0034] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0036] This embodiment provides an exposure machine, specifically a uniform light intensity exposure machine; the exposure machine of this embodiment includes a quantum dot LED screen 1 and an image intensifier 2.

[0037] The quantum dot LED screen 1 is a device containing quantum dot LEDs. Quantum dot LEDs can also be called QLEDs (Quantum LEDs).

[0038] refer to Figure 1 The quantum dot LED screen 1 includes a substrate 11, particles 12, electrodes 13 and a circuit 14.

[0039] The quantum dot LED screen 1 is a quantum dot display device. Quantum dots are individual particles 12, specifically nanoparticles, each of which is luminescent. There are multiple particles 12, each of which is disposed on a substrate 11. Specifically, the individual particles 12 are disposed on the substrate 11 by coating, or multiple particles 12 are plated on the substrate 11.

[0040] Electrodes 13 and circuitry 14 are provided on substrate 11. Electrodes 13 are controllable. Circuitry 14 supplies power to electrodes 13. When energized, electrodes 13 drive quantum dots, or particles 12, to emit light. Circuitry 14 controls which particles 12 emit light and which do not, giving quantum dot LED screen 1 active modulation properties. Therefore, quantum dot LED screen 1 functions as both a light source and a spatial light modulator.

[0041] The quantum dot LED screen 1 has a light-emitting surface 101 ; light emitted from the inside of the quantum dot LED screen 1 is emitted from the light-emitting surface 101 .

[0042] The image intensifier 2 utilizes an optical fiber array to reduce the light emitted from a large luminous area to a smaller area, thereby increasing the brightness of the light.

[0043] The light-emitting surface 101 of the quantum dot LED screen 1 is positioned facing the image intensifier 2 to direct light emitted by the quantum dot LED screen 1 into the image intensifier 2. Specifically, the light-emitting surface 101 of the quantum dot LED screen 1 faces a surface of the image intensifier 2, such as a larger surface 201. In this embodiment, the light-emitting surface 101 of the quantum dot LED screen 1 is positioned directly facing the image intensifier 2, for example, the light-emitting surface 101 is aligned with the surface 201 of the image intensifier 2, so that all light emitted by the quantum dot LED screen 1 is received by the image intensifier 2.

[0044] So, reference Figure 2 The image intensifier 2 can receive the light emitted by the quantum dot LED screen 1 and irradiate the light to the image plane 100, such as the surface of the workpiece; wherein the image intensifier 2 has a light emitting surface 202, and the light emitting surface 202 of the image intensifier 2 is in contact with the image plane 100.

[0045] According to the above, the quantum dot LED screen 1 emits light through evenly distributed quantum dots, serving as both a light source and a spatial light modulator; the light emitted by the quantum dot LED screen 1 enters the image intensifier 2 arranged opposite to the light-emitting surface 101 of the quantum dot LED screen 1, and is received by the image intensifier 2 as much as possible, especially when the light-emitting surface 101 of the quantum dot LED screen 1 is arranged directly opposite to the image intensifier 2, the light emitted in the middle and the light emitted around the quantum dot LED screen 1 can basically be received by the image intensifier 2; in this way, the intensity of the light emitted from the image intensifier 2 has good uniformity, so that the light intensity distribution of the subsequent image is uniform.

[0046] refer to Figure 3 The exposure machine of this embodiment further includes an imaging lens 3. The imaging lens 3 is used to form a desired image, that is, to form a target image, and can reduce or enlarge the object image.

[0047] Imaging lens 3 is disposed between image intensifier 2 and image plane 100. Light emitted from image intensifier 2 propagates to imaging lens 3, which then transmits the light to image plane 100, thereby achieving exposure. In other embodiments, imaging lens 3 is optional, and light emitted from image intensifier 2 is directly irradiated to image plane 100. The image formed on image plane 100 is determined by quantum dot LED screen 1 itself or by a computing device controlling quantum dot LED screen 1.

[0048] Image intensifier 2 has a numerical aperture. The numerical aperture of image intensifier 2 determines the cone angle of light received by image intensifier 2. Setting the numerical aperture of image intensifier 2 can filter the cone angle of light; specifically, light with a propagation angle less than the set numerical aperture will be received by image intensifier 2, while light with a propagation angle greater than the set numerical aperture will not be received by image intensifier 2.

[0049] refer to Figure 3 In this embodiment, the image intensifier 2 is a fiberoptic image intensifier; the quantum dot LED screen 1 is tightly fitted to the fiberoptic image intensifier 2. The fiberoptic image intensifier 2 includes an optical fiber 21, specifically multiple optical fibers (e.g., an optical fiber array). The optical fiber 21 has a set numerical aperture to ensure uniform intensity of light emitted from the image intensifier. For the optical fiber 21, the numerical aperture describes the cone angle of light entering and exiting the optical fiber. Therefore, the fiberoptic image intensifier 2, with its set numerical aperture, limits the cone angle of light entering and exiting the optical fiber.

[0050] refer to Figure 3 From the appearance, the optical fiber image intensifier 2 has a large end and a small end, which is similar to a boss structure. Figure 3 The first end 2A of the optical fiber image intensifier 2 is large, and the second end 2B is small; the first end 2A is used to collect light, and the second end 2B gathers and outputs the light to increase the light power density.

[0051] The image intensifier 2 has a set numerical aperture. The angle of the light emitted from the image intensifier 2 is within the set numerical aperture. The angle of the light is selected, that is, the cone angle of the light entering and exiting is limited, so that the emitted light can be received by the imaging lens 3, and the intensity of the light after imaging is consistent, further improving the uniformity of the light.

[0052] refer to Figure 3 The end surface (i.e., the light receiving surface) of the first end 3A of the imaging lens 3 receives light emitted from the second end 2B of the image intensifier 2. A specified distance exists between the imaging lens 3 and the image intensifier 2, and the light emitted from the image intensifier 2 is projected onto the imaging lens 3. The outer dimensions (e.g., outer diameter) of the first end 3A of the imaging lens 3 are larger than the outer dimensions of the second end 2B of the image intensifier 2, so as to receive light emitted from the edge of the second end 2B of the image intensifier 2 and collect as much light as possible from the image intensifier 2. The end surface (i.e., the light emitting surface) of the second end 3B of the imaging lens 3 is at a specified distance from the image plane 100, and the light emitted from the imaging lens 3 is projected onto the image plane 100. This can better improve light uniformity.

[0053] refer to Figure 4 In other embodiments, the end surface of the first end 3A of the imaging lens 3 is attached to the image intensifier 2, and there is a specified distance between the end surface of the second end 3B of the imaging lens 3 (that is, the light exit surface) and the image plane 100.

[0054] refer to Figure 5 In other embodiments, there is a specified distance between the end surface of the first end 3A of the imaging lens 3 and the image intensifier 2 , and the end surface of the second end 3B of the imaging lens 3 is in contact with the image plane 100 .

[0055] refer to Figure 6 In other embodiments, the end surface of the first end 3A of the imaging lens 3 is bonded to the image intensifier 2 , and the end surface of the second end 3B of the imaging lens 3 is bonded to the image plane 100 .

[0056] In this embodiment, the imaging lens 3 is a lens that can reduce the size of the object image, thereby reducing the exposure area, thereby increasing the light power density.

[0057] The exposure machine of the above embodiment can significantly improve the quality of exposure.

[0058] The above is a further detailed description of the present invention in conjunction with specific / preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. Those skilled in the art to which the present invention relates may make various substitutions or modifications to the described embodiments without departing from the scope of the present invention, and such substitutions or modifications should be considered to fall within the scope of protection of the present invention.

Claims

1. An exposure machine, characterized in that: Including quantum dot LED screen and image intensifier; The quantum dot LED screen has a light-emitting surface, and the light-emitting surface is directly facing the end surface of the first end of the image intensifier so as to irradiate the light emitted by the quantum dot LED screen into the image intensifier; The image intensifier is a fiber optic image intensifier, and its appearance is as follows: the first end is large for collecting light, and the second end is small for concentrating and outputting light to irradiate the light onto the image plane. It has a structure similar to a boss to increase the light power density. The fiber optic image intensifier has a plurality of optical fibers arranged at intervals. The optical fibers have a set numerical aperture for making the intensity of light emitted from the image intensifier uniform. The fiber optic image intensifier with the set numerical aperture limits the cone angle size of light entering and exiting.

2. The exposure machine according to claim 1, wherein: It also includes an imaging lens; the imaging lens is arranged between the image intensifier and the image plane.

3. The exposure machine according to claim 2, wherein: The imaging lens is a lens that can reduce the size of an object image.

4. The exposure machine according to claim 1, wherein: The quantum dot LED screen is a device that serves as a light source and a spatial light modulator.

5. The exposure machine according to claim 1, wherein: The light emitting surface is attached to the image intensifier; The image intensifier has a light emitting surface; there is a specified distance between the light emitting surface of the image intensifier and the image plane; The quantum dot LED screen includes: substrate; an electrode disposed on the substrate; Particles disposed on the electrode and capable of being driven by the electrode to emit light; The particles are nanoparticles.

6. The exposure machine according to claim 2, wherein: The image intensifier has a light emitting surface; the imaging lens has a light receiving surface and a light emitting surface; there is a specified distance between the light receiving surface of the imaging lens and the light emitting surface of the image intensifier; there is a specified distance between the light emitting surface of the imaging lens and the image plane.

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