Medical lamp lens

Abstract

The utility model belongs to optical lens technical field, concretely relates to a medical lamp lens, including substrate, having opposite top surface and bottom surface, lens unit is integrally formed with substrate, include: lens cup body, forms in the substrate bottom surface, and bottom center is provided with the light inlet hole, light projection, forms in the substrate top surface, and is provided with the coaxial arrangement with the light inlet hole, wherein, the outer surface of light projection constitutes the light -emitting surface as a whole, the light -emitting surface is formed by the splicing of multiple parabolic cylinders that are rotationally symmetrical around the central axis, and all parabolic cylinders are continuously adjacent. The utility model utilizes each parabolic cylinder to carry out directional deflection and convergence to light, and then through the synergies of all cylinders, redistributes the light emitted by the rectangular LED chip in space, thereby forms the traditional rectangular image light spot, and reconstructs a circular light spot with clear boundary and high uniformity of illumination, so as to perfectly meet the key demand of light quality in high-end lighting field such as medical shadowless lamp.

Description

Technical Field

[0001] This utility model belongs to the field of optical lens technology, and specifically relates to a medical lamp lens. Background Technology

[0002] Light-emitting diodes (LEDs) have been widely used due to their high brightness and long lifespan. However, LED chips are typically rectangular in shape, and the emitted light has a specific spatial distribution, making it difficult to directly meet the requirements for the shape and uniformity of the illumination spot in specific scenarios. Therefore, optical lenses are usually placed in front of the LED light source to reshape its light pattern.

[0003] Depending on the optical target, these lenses are mainly divided into astigmatic and condensing types. Among them, condensing lenses can effectively converge light and improve the central illumination of the target area. This characteristic makes them highly favored in medical lighting equipment such as surgical shadowless lamps, which can provide the illuminated area with extremely high and uniform illumination to ensure clear surgical vision and precise operation.

[0004] However, since the physical shape of an LED chip is rectangular, when a traditional focusing lens (such as a single convex lens) is used to adjust the LED light, the rectangular shape of the LED chip will be clearly imaged on the illumination plane, thus forming a similar "spot" with obvious rectangular features.

[0005] The aforementioned rectangular light spot often has uneven illuminance distribution, with significant differences in brightness between the edge and center areas. It is also difficult to perfectly match the normally required circular illumination area, which severely restricts the uniformity of illuminance distribution within the surgical field of view and fails to meet the high standard requirements of surgical illumination for light spot uniformity. Utility Model Content

[0006] The purpose of this invention is to provide a medical lamp lens that solves the technical problem in the prior art where rectangular LED light sources produce rectangular light spots when imaged by traditional focusing lenses, resulting in uneven illumination.

[0007] This utility model discloses a medical lamp lens, comprising: The substrate has a top surface and a bottom surface that are opposite to each other; The lens unit, integrally formed with the substrate, includes: A lens cup is formed on the bottom surface of the substrate, and a light entrance hole is provided at the center of the bottom. A light-emitting protrusion is formed on the top surface of the substrate and is coaxially arranged with the light-incident hole; The outer surface of the light-emitting protrusion constitutes the light-emitting surface, which is composed of multiple parabolic cylindrical surfaces that are rotationally symmetrically distributed around its central axis, and all the parabolic cylindrical surfaces are continuously adjacent to each other.

[0008] This application employs a light-emitting surface composed of multiple rotationally symmetrically spliced ​​parabolic cylinders. Each parabolic cylinder directs and converges the light, and through the synergistic effect of all cylinders, the light emitted by the rectangular LED chip is spatially redistributed. This reconstructs the traditional rectangular imaging spot into a circular spot with clear boundaries and highly uniform illuminance, thus perfectly meeting the key light quality requirements of high-end lighting fields such as medical shadowless lamps.

[0009] Based on the above technical solution, the solution of this application can be further improved as follows: Preferably, the number of parabolic cylinders is 20 to 25; by adopting this solution, the target spot size is kept stable while the spot morphology is optimized, thus ensuring the reliability of the focusing effect.

[0010] Preferably, the top surface of the substrate is provided with a light-receiving hole, and the light-emitting protrusion is disposed in the light-receiving hole; by adopting this solution, the glare sensation when the observer is located at the side of the shadowless lamp is significantly reduced, avoiding the problem of eye glare and improving the visual comfort of the medical operating environment.

[0011] Preferably, the light-receiving aperture is frustum-shaped, with its sidewalls extending inward from the top surface of the substrate and connecting with the bottom edge of the light-emitting protrusion; this solution can precisely control the light-emitting angle and effectively intercept high-angle stray light.

[0012] Preferably, the lens unit includes: A positioning protrusion ring is formed on the top surface of the substrate and surrounds the outer periphery of the light-receiving hole, used for alignment and engagement with external components during installation; this design ensures that the optical axis of each lens unit is strictly aligned with the LED light source.

[0013] Preferably, the lens unit includes: A positioning block is located at the bottom of the lens cup; this solution serves a positioning function, improving the accuracy and portability of lens installation and ensuring lighting effect.

[0014] Preferably, there are multiple lens units, and the converging angles of each lens unit are different. In this scheme, the optical axis of the lens unit with the smallest convergence angle is taken as the reference optical axis, which is perpendicular to the substrate; the optical axes of the other lens units are all tilted inward relative to the reference optical axis, so that the light spots emitted by all the lens units are superimposed at a preset position; by adopting this scheme, the convergence and superposition of different uniform sub-spots in the target area are realized, forming a highly uniform and shadowless illumination field in the surgical area, so that there is no obvious illuminance unevenness in the overall illumination area after superposition.

[0015] Preferably, the substrate has mounting holes, and multiple lens units are arranged in a ring array around the mounting holes. This solution achieves high-density arrangement within a limited area, and also ensures uniform force distribution on the fasteners, effectively avoiding off-center load torque caused by uneven mass distribution, and ensuring a stable and reliable mechanical connection between the lens module and the lamp body.

[0016] Through the above technical solution, this utility model achieves the following beneficial effects: 1. This application constructs a light-emitting surface by splicing multiple rotationally symmetrical parabolic cylinders. Each parabolic cylinder is used to directionally deflect and converge light. Through the synergistic effect of all cylinders, the light emitted by the rectangular LED chip is spatially redistributed, thereby reconstructing the traditional rectangular imaging spot into a circular spot with clear boundaries and highly uniform illuminance. This perfectly meets the key light quality requirements of high-end lighting fields such as medical shadowless lamps. 2. By limiting the number of parabolic cylinders to 20 to 25, this application can reconstruct a circular light spot with soft edges, while avoiding excessive light energy diffusion caused by too many units. Thus, while optimizing the light spot morphology, it maintains the stability of the target light spot size and ensures the reliability of the light focusing effect. 3. By placing the light-emitting protrusion in the light-receiving aperture, this application can effectively intercept and block stray light emitted from the edge of the light-emitting protrusion at a large angle, thereby significantly reducing the glare when the observer is located at the side of the shadowless lamp, avoiding the problem of glare, and improving the visual comfort of the medical operating environment. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the medical lamp lens described in a specific embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the light-emitting surface in the lens of the medical lamp is shown. Figure 3 This is a comparison image of light spot imaging; Figure 4 for Figure 1 The diagram shown illustrates the usage status of the medical lamp lens: Explanation of reference numerals in the attached figures: 1. Substrate; 11. Mounting holes; 2. Lens unit; 21. Lens cup; 211. Light entrance aperture; 22. Light exit protrusion; 221. Parabolic cylinder; 23. Light receiving aperture; 24. Positioning protrusion ring; 25. Positioning block. Detailed Implementation

[0019] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0022] Example: like Figure 1 and Figure 2 As shown in the figure, this application discloses a medical lamp lens for optically reshaping the light emitted by a rectangular LED light source. Through a special light-emitting surface structure, the rectangular light spot is transformed into a circular light spot with uniform illuminance to meet the stringent requirements for light spot shape and illuminance uniformity in high-standard lighting occasions such as medical shadowless lamps. Its specific structure includes: a substrate 1 and a lens unit 2.

[0023] The substrate 1 has a top surface and a bottom surface facing away from each other, which are used to provide physical support for the lens unit 2, ensure the rigidity of the overall structure, and facilitate installation.

[0024] The lens unit 2 is responsible for the collection, transmission and redistribution of light. It is integrally formed with the substrate 1 and has the advantages of no assembly error, good optical performance consistency and low production cost. Specifically, it includes: lens cup 21 and light-emitting protrusion 22.

[0025] Specifically, a lens cup 21 is formed on the bottom surface of the substrate 1, and a light entrance hole 211 is provided at the center of the bottom; a light exiting protrusion 22 is formed on the top surface of the substrate 1 and is coaxially arranged with the light entrance hole 211. The outer surface of the light exiting protrusion 22 constitutes the light exiting surface, which is composed of multiple parabolic cylindrical surfaces 221 that are distributed in a rotationally symmetrical manner around its central axis, and all parabolic cylindrical surfaces 221 are continuously adjacent to each other.

[0026] It should be noted that the parabolic cylinder 221 refers to the surface formed by stretching a parabola along a direction perpendicular to its plane, which combines the optical properties of a parabola and the directional properties of a cylinder.

[0027] It is understandable that, such as Figure 3 As shown, each independent parabolic cylinder 221 can efficiently deflect and converge the light incident on its surface, thereby forming a rectangular light spot deflected at an angle on the irradiated plane; when multiple parabolic cylinders 221 are symmetrically spliced ​​together around a central axis, multiple rectangular light spots with different deflection angles will overlap and fill each other, thereby jointly shaping a circular light spot with clear boundaries and highly uniform internal energy distribution.

[0028] This invention employs a light-emitting surface composed of multiple rotationally symmetrically spliced ​​parabolic cylindrical surfaces 221. Each parabolic cylindrical surface 221 directs and converges the light, and through the synergistic effect of all the cylindrical surfaces, the light emitted by the rectangular LED chip is spatially redistributed. This reconstructs the traditional rectangular imaging spot into a circular spot with clear boundaries and highly uniform illuminance, thus perfectly meeting the key light quality requirements of high-end lighting fields such as medical shadowless lamps.

[0029] In some embodiments, such as Figure 2 As shown, the number of parabolic cylinders 221 is 20 to 25.

[0030] The above design ensures that the light-emitting surface has enough optical units to finely disperse the rectangular image of the LED, thereby reconstructing a circular light spot with soft edges. It also avoids excessive light diffusion caused by too many units, thus maintaining the stability of the target light spot size while optimizing the light spot morphology and ensuring the reliability of the light-gathering effect.

[0031] In some embodiments, such as Figure 2 As shown, a light-receiving hole 23 is provided on the top surface of the substrate 1, and a light-emitting protrusion 22 is provided in the light-receiving hole 23.

[0032] The above design effectively intercepts and blocks stray light emitted from the edge of the light-emitting protrusion 22 at large angles, thereby significantly reducing glare when the observer is positioned at the side of the shadowless lamp, avoiding eye strain and improving the visual comfort of the medical operating environment.

[0033] Based on the above embodiments, such as Figure 1 As shown, the light-receiving aperture 23 is frustum-shaped, and its sidewall extends inward from the top surface of the substrate 1 and connects with the bottom edge of the light-emitting protrusion 22.

[0034] Through the above design, the light emission angle can be precisely controlled and high-angle stray light can be effectively blocked. This not only limits the effective light to the target illumination area, but also completely eliminates glare interference when observing from the side, significantly improving the visual comfort and safety of the medical lighting environment.

[0035] Based on the above embodiments, such as Figure 2 As shown, lens unit 2 includes: A positioning protrusion 24 is formed on the top surface of the substrate 1 and surrounds the outer periphery of the light receiving hole 23 for alignment and engagement with external components during installation.

[0036] Through the above design, the lens can be quickly and accurately aligned with external components during installation, ensuring that the optical axis of each lens unit 2 is strictly aligned with the LED light source, thereby ensuring the regularity of the overall light spot shape and the uniformity of the illuminance distribution, while improving assembly efficiency and product consistency.

[0037] In some embodiments, such as Figure 2 As shown, the lens unit 2 includes a positioning block 25, which is located at the bottom of the lens cup 21 and plays a positioning role, improving the accuracy and portability of lens installation and ensuring the lighting effect.

[0038] In some embodiments, such as Figure 2 As shown, there are multiple lens units 2, and the converging angles of each lens unit 2 are different. Among them, the optical axis of the lens unit 2 with the smallest converging angle is used as the reference optical axis, which is perpendicular to the substrate 1; the optical axes of the other lens units 2 are all tilted inward relative to the reference optical axis, so that the light spots emitted by all lens units 2 are superimposed at a preset position.

[0039] It is understandable that, taking the optical axis of the lens unit 2 with the smallest converging angle as the reference optical axis, and the reference optical axis being perpendicular to the substrate 1, means that the light spot formed by the lens unit 2 will be perpendicularly irradiated onto the target area. Therefore, it will not be deformed due to off-axis, thus presenting a regular shape, and the outer aperture can form a near-circular effect, thereby improving the uniformity of illumination. Since the light spot size formed by the other lens units 2 is relatively large, the light spot deformation caused by their slight off-axis design is not obvious, so the large aperture formed is also relatively regular and the shape is approximately circular.

[0040] Understandably, the optical axes of the remaining lens units 2 are all tilted inward relative to the reference optical axis, so that the light spots emitted by all lens units 2 are superimposed at the preset position. This is intended to ensure that no matter how different lenses with different convergence angles are combined to light up (i.e., adjusting the size and illuminance of the light spot), the central area of ​​all light spots is "locked" in the same position, so that the core of the illumination area will not drift with the mode switching, and the doctor does not need to repeatedly adjust the position of the lamp head.

[0041] Through the above design, the convergence and superposition of different uniform sub-spots in the target area are realized, thereby forming a highly uniform and shadowless illumination field in the surgical area, so that there is no obvious uneven illumination in the overall illumination area after superposition.

[0042] Based on the above embodiments, a mounting hole 11 is provided on the substrate 1, and multiple lens units 2 are arranged in a ring array around the mounting hole 11.

[0043] For example, there are three lens units 2 in total, arranged in an equilateral triangle layout, which has the advantages of compact structure and easy installation.

[0044] The above design achieves high-density arrangement within a limited area, significantly improving the integration of the light source and the efficiency of space utilization. It also ensures that the fasteners are evenly stressed, effectively avoiding the off-center load torque caused by uneven mass distribution, and ensuring a stable and reliable mechanical connection between the lens module and the lamp body.

[0045] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A medical lamp lens, characterized in that, include: The substrate has a top surface and a bottom surface that are opposite to each other; The lens unit, integrally formed with the substrate, includes: A lens cup is formed on the bottom surface of the substrate, and a light entrance hole is provided at the center of the bottom. A light-emitting protrusion is formed on the top surface of the substrate and is coaxially arranged with the light-incident hole; The outer surface of the light-emitting protrusion constitutes the light-emitting surface, which is composed of multiple parabolic cylindrical surfaces that are rotationally symmetrically distributed around its central axis, and all the parabolic cylindrical surfaces are continuously adjacent to each other.

2. The medical lamp lens according to claim 1, characterized in that, The number of parabolic cylinders is 20 to 25.

3. The medical lamp lens according to claim 1, characterized in that, The substrate has a light-receiving hole on its top surface, and the light-emitting protrusion is disposed in the light-receiving hole.

4. The medical lamp lens according to claim 3, characterized in that, The light-receiving aperture is frustum-shaped, with its sidewalls extending inward from the top surface of the substrate and connecting with the bottom edge of the light-emitting protrusion.

5. The medical lamp lens according to claim 3, characterized in that, The lens unit includes: A positioning protrusion is formed on the top surface of the substrate and surrounds the outer periphery of the light-receiving hole, for alignment and engagement with external components during installation.

6. The medical lamp lens according to claim 1, characterized in that, The lens unit includes: A positioning block is located at the bottom of the lens cup.

7. The medical lamp lens according to any one of claims 1 to 6, characterized in that, The number of lens units is multiple, and the convergence angle of each lens unit is different. Among them, the optical axis of the lens unit with the smallest convergence angle is taken as the reference optical axis, and the reference optical axis is perpendicular to the substrate; the optical axes of the other lens units are all inclined inward relative to the reference optical axis, so that the light spots emitted by all the lens units are superimposed at a preset position.

8. The medical lamp lens according to claim 7, characterized in that, The substrate has mounting holes, and multiple lens units are arranged in a ring array around the mounting holes.

Images