High-power ultraviolet dodging lighting device

Abstract

The invention discloses a high-power ultraviolet dodging lighting device, which sequentially comprises an optical fiber device, a dodging device and a relay lens group along a light beam propagation direction, and is characterized in that a light beam emitted by the optical fiber device is dodged by the dodging device, is amplified by the relay lens group and then reaches an irradiation surface; the relay lens group comprises a first lens, a second lens, a third lens and a fourth lens, the first lens and the second lens are used for amplifying light spots, and the third lens and the fourth lens are used for improving the uniformity of the amplified light spots. The embodiment of the invention can improve the illumination uniformity and the light source utilization rate, simplify the structure, and can be widely applied to the technical field of optical devices.

Description

Technical Field

[0001] The present invention relates to the technical field of optical devices, and in particular to a high-power ultraviolet uniform light illumination device. Background Art

[0002] Traditional UV lighting components have complex structures, low light source utilization, high energy consumption and high cost of use. In today's world of energy conservation and environmental protection, they are in urgent need of improvement and optimization. In addition, the illumination of traditional lighting components is uneven, resulting in uneven thickness of the light spot lines, which causes great trouble in actual use. Summary of the invention

[0003] In view of this, in order to solve one of the above problems, an object of an embodiment of the present invention is to provide a high-power ultraviolet uniform light illumination device, which can improve the illumination uniformity and light source utilization rate and simplify the structure.

[0004] An embodiment of the present invention provides a high-power ultraviolet uniform light illumination device, which includes an optical fiber device, a uniform light device and a relay lens group in sequence along the propagation direction of the light beam. The light beam emitted by the optical fiber device is uniformed by the uniform light device and reaches the irradiation surface after being magnified by the relay lens group; the relay lens group includes a first lens, a second lens, a third lens and a fourth lens, the first lens and the second lens are used to magnify the light spot, and the third lens and the fourth lens are used to improve the uniformity of the magnified light spot.

[0005] Optionally, the output end face of the optical fiber device is a regular shape, and the regular shape includes a rectangle or a square.

[0006] Optionally, the light homogenizing device comprises a square rod, and the incident surface and the output surface of the square rod comprise a rectangle or a square.

[0007] Optionally, the wavelength range of the light beam emitted by the optical fiber device includes 350nm-450nm.

[0008] Optionally, the power of the light beam emitted by the optical fiber device is less than or equal to 200W.

[0009] Optionally, the numerical aperture range of the optical fiber device includes 0.2-0.3.

[0010] Optionally, the output end face of the optical fiber device matches the incident end face of the light homogenizing device.

[0011] Optionally, the relay lens group includes a double telecentric lens group.

[0012] Optionally, the object-side telecentricity of the relay lens assembly is less than 0.1°, and the image-side telecentricity of the relay lens assembly is less than 0.1°.

[0013] Optionally, the first lens comprises a meniscus positive power lens, the second lens comprises a meniscus positive power lens, the third lens comprises a plano-convex positive power lens, and the fourth lens comprises a bi-convex positive power lens.

[0014] The implementation of the embodiments of the present invention includes the following beneficial effects: the high-power ultraviolet uniform light illumination device of the embodiment includes an optical fiber device, a uniform light device and a relay mirror group in sequence along the propagation direction of the light beam. The light beam emitted by the optical fiber device is uniformed by the uniform light device to improve the uniformity of the illumination, and is magnified by the relay mirror group before reaching the irradiation surface. The relay mirror group includes a first lens, a second lens, a third lens and a fourth lens. The first lens and the second lens are used to magnify the light spot and improve the utilization rate of the light source. The third lens and the fourth lens are used to improve the uniformity of the magnified light spot and further improve the uniformity of the illumination. The high-power ultraviolet uniform light illumination device includes an optical fiber device, a uniform light device and a relay mirror group. The components have a simple structure and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a high-power ultraviolet uniform light illumination device provided by an embodiment of the present invention;

[0016] Figure 2 This is a light path diagram of a high-power ultraviolet uniform light illumination device provided by an embodiment of the present invention;

[0017] Figure 3 Schematic diagram of transmittance of a high-power ultraviolet uniform light illumination device provided by an embodiment of the present invention;

[0018] Figure 4 Schematic diagram of uniformity of a high-power ultraviolet uniform light illumination device provided by an embodiment of the present invention;

[0019] Figure 5 It is a schematic diagram of uniformity of another high-power ultraviolet uniform light illumination device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The step numbers in the following embodiments are only provided for the convenience of explanation and description, and the order between the steps is not limited in any way. The execution order of each step in the embodiment can be adaptively adjusted according to the understanding of those skilled in the art.

[0021] like Figure 1As shown, an embodiment of the present invention provides a high-power ultraviolet uniform light illumination device, which includes an optical fiber device (G1), a uniform light device (G2) and a relay lens group (G3) in sequence along the propagation direction of the light beam. The light beam emitted by the optical fiber device (G1) is uniformed by the uniform light device (G2) and is magnified by the relay lens group (G3) before reaching an irradiation surface (S1); the relay lens group (G3) includes a first lens (L1), a second lens (L2), a third lens (L3) and a fourth lens (L4). The first lens (L1) and the second lens (L2) are used to magnify the light spot, and the third lens (L3) and the fourth lens (L4) are used to improve the uniformity of the magnified light spot.

[0022] It should be noted that the specific structures of the optical fiber device (G1), the light homogenizing device (G2) and the relay mirror assembly (G3) and the distances therebetween are determined according to actual applications and are not specifically limited in this embodiment.

[0023] See also Figure 2 The light beam emitted by the optical fiber device (G1) is homogenized by the light homogenizing device (G2), and is amplified by the relay lens group (G3) before reaching the irradiation surface (S1).

[0024] Optionally, the first lens includes a meniscus positive power lens, the second lens includes a meniscus positive power lens, the third lens includes a plano-convex positive power lens, and the fourth lens includes a biconvex positive power lens.

[0025] It should be noted that the specific structures and optical powers of the first lens, the second lens, the third lens and the fourth lens are determined according to actual applications, and are not specifically limited in this embodiment.

[0026] Optionally, the relay lens assembly includes a double telecentric lens assembly.

[0027] Optionally, the object-side telecentricity of the relay lens assembly is less than 0.1°, and the image-side telecentricity of the relay lens assembly is less than 0.1°.

[0028] In the double telecentric lens group, the incident light and the exit pupil are projected to their respective infinity. This design makes its field of view completely unaffected by changes in the object position or sensor position, and will not suffer from cos4θ attenuation. The side of the relay lens group close to the light homogenizer is the object telecentricity, and the side of the relay lens group close to the irradiation surface is the image telecentricity. The object telecentricity and image telecentricity of the relay lens group are determined according to the actual application, and this embodiment does not make specific restrictions.

[0029] It should be noted that after the incident light passes through the second lens of the relay lens group, a real image is formed between the second lens and the third lens.

[0030] Optionally, the output end face of the optical fiber device is a regular shape, and the regular shape includes a rectangle or a square.

[0031] It should be noted that the output end face of the optical fiber device is determined according to the actual application, and this embodiment does not impose any specific restrictions. The output end face of the optical fiber device includes but is not limited to a circle, a rectangle, or a square. The specific size of the output end face of the optical fiber device is determined according to the actual application, and this embodiment does not impose any specific restrictions.

[0032] Optionally, the light homogenizing device comprises a square rod, and the incident surface and the output surface of the square rod comprise a rectangle or a square.

[0033] It should be noted that the light homogenizing device is determined according to the actual application, and this embodiment does not make any specific restrictions. The light homogenizing device includes but is not limited to a square rod or a round rod, the incident surface and the exit surface of the square rod are the same or different, and the incident surface and the exit surface of the square rod both include a rectangle or a square. The specific dimensions of the incident surface and the exit surface of the square rod are determined according to the actual application, and this embodiment does not make any specific restrictions.

[0034] Optionally, the output end face of the optical fiber component matches the incident end face of the light homogenizing component.

[0035] The output end face of the optical fiber device matches the incident end face of the light homogenizing device, which can better guide the output light of the optical fiber device into the light homogenizing device. For example, the output end face of the optical fiber device is a rectangle, the incident end face of the light homogenizing device is a rectangle, the length and width of the rectangle of the output end face of the optical fiber device are consistent with the length and width of the rectangle of the incident end face of the light homogenizing device, and the sizes of the two rectangles are matched.

[0036] Optionally, the wavelength range of the light beam emitted by the optical fiber device includes 350nm-450nm.

[0037] Optionally, the power of the light beam emitted by the optical fiber device is less than or equal to 200W.

[0038] It should be noted that the wavelength range of the light beam emitted by the optical fiber device and the power of the light beam emitted by the optical fiber device are determined according to the actual application, and this embodiment does not impose specific restrictions. The wavelength of the light beam emitted by the optical fiber device is a part of the wavelength of ultraviolet light. The power of the light beam emitted by the optical fiber device is determined according to the requirements of the lighting device and the power range of the optical fiber device, the light homogenizing device and the relay mirror group.

[0039] Optionally, the numerical aperture range of the optical fiber device includes 0.2-0.3.

[0040] The numerical aperture of the optical fiber device is determined according to actual application, and this embodiment does not impose any specific limitation.

[0041] The high-power ultraviolet uniform light illumination device is described below with reference to a specific embodiment.

[0042] See also Figure 1, along the direction of light beam propagation, there are optical fiber device (G1), light homogenizing device (G2), relay lens group (G3) and irradiation surface (S1). The light output end face of the optical fiber device (G1) is a rectangle of 1.4mm*0.25mm. The light homogenizing device (G2) is a square rod with a length of 55mm, and the light input end face and the light output end face are rectangles of 2.5mm*1.45mm. The relay lens group (G3) includes the first lens (L1) to the fourth lens (L4), wherein the first lens (L1) is a meniscus positive power lens, the second lens (L2) is a meniscus positive power lens, the third lens (L3) is a plano-convex positive power lens, the fourth lens (L4) is a biconvex positive power lens, and the irradiation surface (S1) is a rectangle of 20.8mm*11.8mm, 130mm away from the fourth lens (L4).

[0043] The optical data of the relay lens group (G3) are as follows:

[0044] Surface number Face type R d n v 1 Spherical -35 6.8 1.46 67.8 2 Spherical -11.22 15.3 3 Spherical -44.8 7.2 1.46 67.8 4 Spherical -18.792 50.2 5 Spherical Infinity 7.5 1.46 67.8 6 Spherical -58.9 110 7 Spherical 170.12 11 1.46 67.8 8 Spherical -170.12

[0045] Among them, R represents the radius of curvature of the lens, d represents the lens thickness or air space, n represents the refractive index of the glass, and v represents the Abbe number of the glass.

[0046] The fiber numerical aperture of the fiber optic device (G1) is 0.2, the light source power is 1W, refer to Figure 3 , the light source utilization rate of the irradiated surface exceeds 98%. Figure 4 and Figure 5 , the illumination uniformity on the illuminated surface is high, exceeding 94%.

[0047] The implementation of the embodiments of the present invention includes the following beneficial effects: the high-power ultraviolet uniform light illumination device of the embodiment includes an optical fiber device, a uniform light device and a relay mirror group in sequence along the propagation direction of the light beam. The light beam emitted by the optical fiber device is uniformed by the uniform light device to improve the uniformity of the illumination, and is magnified by the relay mirror group before reaching the irradiation surface. The relay mirror group includes a first lens, a second lens, a third lens and a fourth lens. The first lens and the second lens are used to magnify the light spot and improve the utilization rate of the light source. The third lens and the fourth lens are used to improve the uniformity of the magnified light spot and further improve the uniformity of the illumination. The high-power ultraviolet uniform light illumination device includes an optical fiber device, a uniform light device and a relay mirror group. The components have a simple structure and reduce costs.

[0048] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A high-power ultraviolet uniform light illumination device, characterized in that: The optical fiber device, the light homogenizing device and the relay lens group are included in sequence along the propagation direction of the light beam. The light beam emitted by the optical fiber device is homogenized by the light homogenizing device and reaches the irradiation surface after being magnified by the relay lens group. The relay lens group includes a first lens, a second lens, a third lens and a fourth lens. The first lens and the second lens are used to magnify the light spot, and the third lens and the fourth lens are used to improve the uniformity of the magnified light spot.

2. The high-power ultraviolet uniform light illumination device according to claim 1, characterized in that: The output end face of the optical fiber device is a regular shape, and the regular shape includes a rectangle or a square.

3. The high-power ultraviolet uniform light illumination device according to claim 1, characterized in that: The light homogenizing device comprises a square rod, and the incident surface and the exit surface of the square rod comprise a rectangle or a square.

4. The high-power ultraviolet uniform light illumination device according to claim 1, characterized in that: The wavelength range of the light beam emitted by the optical fiber device includes 350nm-450nm.

5. The high-power ultraviolet uniform light illumination device according to claim 1, characterized in that: The power of the light beam emitted by the optical fiber device is less than or equal to 200W.

6. The high-power ultraviolet uniform light illumination device according to claim 1, characterized in that: The numerical aperture of the optical fiber device ranges from 0.2 to 0.

3.

7. The high-power ultraviolet uniform light illumination device according to claim 1, characterized in that: The output end face of the optical fiber device matches the incident end face of the light homogenizing device.

8. The high-power ultraviolet uniform light illumination device according to claim 1, characterized in that: The relay lens assembly includes a double telecentric lens assembly.

9. The high-power ultraviolet uniform light illumination device according to claim 8, characterized in that: The object-side telecentricity of the relay lens assembly is less than 0.1°, and the image-side telecentricity of the relay lens assembly is less than 0.1°.

10. The high-power ultraviolet uniform light illumination device according to claim 1, characterized in that: The first lens includes a meniscus positive power lens, the second lens includes a meniscus positive power lens, the third lens includes a plano-convex positive power lens, and the fourth lens includes a biconvex positive power lens.

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