Light adjusting component and optical system for blue light therapy device

Abstract

The application provides a light adjusting component and an optical system for a blue light therapy instrument, wherein the light adjusting component comprises an optical lens combination, the optical lens combination comprises a pair of optical lens units, two optical lens units of the pair of optical lens units are mirror-symmetrically arranged, and the light spot of the light of the treatment light source projected on a treatment area through the light adjusting component is in a rectangular shape. The application provides an optical system with a rectangular light spot with clear boundaries, which is used for infant jaundice treatment, the treatment light spot range is just clear and uniformly radiated on the treatment area to achieve effective treatment effect, which can not only avoid the situation that too much light overflows, resulting in low utilization and light pollution, but also avoid the situation that there are dark areas and four corners that cannot be covered in the prior art, and can also avoid the situation that the light spot splicing produces a situation that the light and dark difference of the superposition place and the non-superposition place is large and the uniformity is poor.

Description

Technical Field

[0001] This invention relates to the field of blue light therapy devices, and in particular to a light adjustment component and an optical system for blue light therapy devices. Background Technology

[0002] Currently available blue light therapy devices often suffer from several shortcomings in clinical application. For example, the treatment area is insufficient to cover the entire infant's body, resulting in a small treatment area for breaking down jaundice and poor therapeutic effects. Some products on the market use a cumbersome method of stacking illumination units to achieve a large treatment area, making the device too large and heavy, inconvenient to use. Furthermore, traditional optical illumination schemes often lack clear beam boundaries, or even have excessively diffused edges, easily causing glare for medical staff and leading to visual fatigue. This invention designs a lens that combines wide-angle beam amplification and polarization, using a symmetrical arrangement of two rows of this lens to obtain a clearly defined rectangular beam. This results in a rectangular treatment area beam that closely approximates the shape of a human body in a lying position, satisfying the therapeutic effect without causing unnecessary light spillage and light pollution. Traditional solutions in this area suffer from drawbacks: the device is too large, making it inconvenient to use; excessive light spillage leads to low utilization and light pollution; and the illuminated area obtained by splicing beams cannot achieve a perfectly rectangular shape, resulting in dark areas and insufficient uniformity. Therefore, existing technologies still need to be improved. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a light adjustment component and an optical system for a blue light therapy device.

[0004] To solve the above technical problems, the present invention adopts the following technical solution:

[0005] The present invention provides a light adjustment component, which includes an optical lens assembly, the optical lens assembly including a pair of optical lens units, the two optical lens units of the pair of optical lens units being arranged in a mirror symmetrical manner, and the light from the treatment light source passing through the light adjustment component and projecting onto the treatment area forming a rectangular light spot.

[0006] Furthermore, the light adjustment component, wherein the optical lens unit is rectangular in shape from the perspective of the light-emitting side, specifically, is a rounded rectangle, and has a major axis and a minor axis, wherein the major axis and the minor axis are perpendicular to each other.

[0007] Furthermore, in the light adjustment component, the two optical lens units of the optical lens assembly are arranged in a mirror-symmetrical manner along the minor axis.

[0008] In a preferred embodiment, the light adjustment component includes an integrated optical lens group, which is composed of multiple optical lens combinations arranged in a linear array along the long axis. This linear array of mirror-symmetric optical lens combinations achieves a sufficiently high radiation intensity.

[0009] Specifically, in the light adjustment component, the optical lens unit has an "n" shaped cross-section along its long axis.

[0010] Specifically, in the light adjustment component, the optical lens unit has an "n" shaped cross-section in the short axis direction.

[0011] Specifically, in the light adjustment component, the lens thickness of the optical lens unit on the side closer to the center of the treatment area is greater than the lens thickness on the side farther from the center of the treatment area. That is, the lens thickness of the optical lens unit is thicker on the side closer to the center of the treatment area, and thinner on the side closer to the edge of the treatment area.

[0012] Specifically, in the light adjustment component, the mirror surface on the light-incident side of the optical lens unit is an inwardly concave free-form optical surface, and the mirror surface on the light-outceasing side of the optical lens unit is an outwardly convex free-form optical surface.

[0013] The present invention provides an optical system for a blue light therapy device, including a treatment light source and a light adjustment component as described above, wherein the light from the treatment light source is projected onto the treatment area through the light adjustment component in a rectangular shape.

[0014] In a preferred embodiment, the optical system for the blue light therapy device has a rectangular treatment area, and the treatment light source is located directly above the center of the treatment area.

[0015] In a preferred embodiment, the optical system for the blue light therapy device uses an LED light source as the treatment light source.

[0016] The relevant structural parameters of the product of this invention can be designed by those skilled in the art based on the size of the rectangular treatment area, the height of the treatment light source from the treatment area, and the performance requirements of equal illuminance in the treatment area. For example, based on the geometric relationship in optics: I = E * d^2 (where I is the point light intensity, E is the point illuminance, and d is the irradiation distance), and combined with the performance requirements of equal illuminance for the entire treatment area, the emission angle of the optical lens in the long axis direction can be calculated. This angle is divided into N equal parts, and after differentiation, the light intensity distribution curve at each angle can be obtained. After obtaining the light intensity distribution curve, the appropriate lens material can be selected, and the corresponding free optical curves of the incident and emitting sides can be optimized to form a lens structure in the long axis direction. Furthermore, in order to enhance the clarity of the irradiation area boundary, a light intensity bias design is implemented in the short axis direction. Similarly, the light intensity curve is obtained based on the geometric model and the relationship I = E * d^2. Similarly, combined with the selection of materials, the lens structure composed of the corresponding free optical curves of the incident and emitting sides can be obtained. Combining the free optical curves of the incident and emitting sides generated in different directions can obtain the free optical surfaces of the incident and emitting sides, thereby obtaining a closed lens structure. Then, the optical lens combination is formed by mirror symmetry in the short axis direction to obtain structural symmetry, thereby achieving a symmetrical relationship of light intensity distribution, which is necessary to obtain a uniform illumination effect in the treatment area.

[0017] Compared to existing technologies, this invention provides a light adjustment component and an optical system for a blue light therapy device. The light adjustment component includes an optical lens assembly comprising a pair of optical lens units arranged mirror-symmetrically. Light from the therapeutic light source, projected onto the treatment area through the light adjustment component, forms a rectangular light spot. The optical system for the blue light therapy device includes a therapeutic light source and the aforementioned light adjustment component. Light from the therapeutic light source, projected onto the treatment area through the light adjustment component, forms a rectangular light spot. This invention provides an optical system with a clearly defined rectangular light spot for treating infantile jaundice using a blue light therapy device. The treatment spot area is precisely and uniformly radiated across the treatment area, achieving an effective therapeutic effect. This not only avoids the problem of excessive coverage by large circular light spots in existing technologies (which resemble the circumcircle of the rectangular treatment area), resulting in excessive light spillage, low utilization, and light pollution, but also avoids the issue of multiple circular light spots failing to achieve a rectangular illumination area, and the resulting dark areas and uncovered corners when splicing inscribed circles. Furthermore, it avoids the significant brightness difference and poor uniformity between overlapping and non-overlapping areas caused by spot splicing in existing technologies. This invention achieves effective illumination over a large area with a smaller light-emitting unit, unlike traditional jaundice therapy devices that require a large lamp body to achieve a large illumination spot, thus greatly improving ease of use. This invention is used in blue light therapy devices to achieve an approximately rectangular lighting effect. The lighting effect is uniform and the boundaries are clear. Unlike traditional multi-spot superposition schemes, the final irradiated light will overflow or the treatment area will have uneven brightness. This invention does not produce stray light that overflows into the environment and there is no glare pressure in the environment where it is used. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the irradiation structure of an existing therapeutic device.

[0019] Figure 2 This is a schematic diagram of the light spot effect in the treatment area of ​​another existing therapeutic device.

[0020] Figure 3 This is a schematic diagram of the light spot effect in the treatment area of ​​another existing therapeutic device.

[0021] Figure 4 This is a schematic diagram of the light spot effect in the treatment area of ​​an existing therapeutic device.

[0022] Figure 5 A schematic diagram of the structure of the light adjustment component of the optical system for a blue light therapy device provided by the present invention. Figure 1 .

[0023] Figure 6A schematic diagram of the structure of the light adjustment component of the optical system for a blue light therapy device provided by the present invention. Figure 2 .

[0024] Figure 7 This is a schematic diagram of the irradiation structure of the blue light therapy device provided by the present invention.

[0025] Figure 8 This is a schematic diagram of the structure of the optical lens unit of the optical system for a blue light therapy device provided by the present invention.

[0026] Figure 9 This is a schematic diagram of the optical lens unit of the optical system for a blue light therapy device provided by the present invention from the perspective of the light-emitting side.

[0027] Figure 10 This is a schematic diagram of the structure of the blue light therapy device provided by the present invention, which performs N-level segmented irradiation in the L1 direction.

[0028] Figure 11 This is a schematic diagram of the light intensity distribution curve in the L1 direction of the blue light therapy device provided by the present invention.

[0029] Figure 12 This is a schematic diagram of the optical structure of the optical lens unit of the optical system for a blue light therapy device provided by the present invention in the L1 direction.

[0030] Figure 13 This is a schematic diagram of the structure of the blue light therapy device provided by the present invention, which performs N-level segmented irradiation in the L2 direction.

[0031] Figure 14 This is a schematic diagram of the light intensity distribution curve in the L2 direction of the blue light therapy device provided by the present invention.

[0032] Figure 15 This is a schematic diagram of an optical lens unit in the L2 direction of the optical system for a blue light therapy device provided by the present invention.

[0033] Figure 16 This is a schematic diagram of the blue light therapy device provided by the present invention, which is divided into N equal sections in different directions.

[0034] Figure 17 This is a schematic diagram of a mirror-symmetric structure of an optical lens assembly for an optical system used in a blue light therapy device, as provided by the present invention.

[0035] Figure 18 This is a schematic diagram of the light intensity distribution curve of an optical lens assembly for an optical system of a blue light therapy device provided by the present invention.

[0036] Figure 19A schematic diagram of the isoilluminance line distribution of the optical system for a blue light therapy device provided by the present invention, with the maximum illuminance at the center of the light spot in the treatment area being 100%. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0038] It should be noted that when a component is referred to as being "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or may have an intervening component present. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or may have an intervening component present.

[0039] It should also be noted that the directional terms such as left, right, up, and down in the embodiments of the present invention are only relative concepts or are based on the normal use state of the product, and should not be considered as restrictive.

[0040] In existing technologies, some optical illumination units are infinitely pieced together, with the light-emitting area of ​​the lamp head being roughly the same size as the treatment area, such as... Figure 1 As shown, this achieves the required illumination area and uniformity, but the instrument will be relatively large, which is inconvenient for use. Some illumination spots are large circular spots, such as... Figure 2 As shown, excessive coverage by large circular light spots, equivalent to the circumcircle of the rectangular treatment area, results in excessive light spillage, leading to low utilization and light pollution. Some irradiation spots are composed of multiple circular light spots pieced together, such as... Figure 3 As shown, the illumination area obtained by stitching together multiple circular light spots cannot be completely rectangular; stitching together inscribed circles will result in dark areas and uncovered corners. Some illumination spots are formed by stitching together multiple circular light spots, but these are stitched together with circumscribed circles, such as... Figure 4 As shown, splicing circumscribed circles can cause light spot overflow, resulting in light pollution. Regardless of the splicing method, there will always be significant differences in brightness between overlapping and non-overlapping areas, leading to poor uniformity. Therefore, this invention provides an optical system for blue light therapy devices that can project an approximately rectangular light spot to match a rectangular treatment area (working platform). This not only provides a wide effective irradiation area but also avoids unnecessary light spot overflow and ensures good irradiation uniformity.

[0041] like Figure 5 , Figure 6 , Figure 7As shown, the present invention provides a light adjustment component and an optical system for a blue light therapy device including the light adjustment component. The light adjustment component 100 includes an optical lens assembly 110, which includes a pair of optical lens units 111. The two optical lens units 111 of the pair of optical lens units 111 are arranged in a mirror-symmetrical manner. The optical system for the blue light therapy device includes a treatment light source and the light adjustment component 100. The light from the treatment light source passes through the light adjustment component 100 and projects a rectangular spot onto the treatment area, specifically, a rounded rectangle. The optical system for the blue light therapy device provided by the present invention is located in the main body 10 of the therapy device. The treatment area is usually rectangular. In order to obtain a spot that illuminates only the treatment area, the present invention uses an approximately rectangular freeform surface lens, controlling the surface design of the long and short sides to achieve the desired light distribution, that is, a rectangular irradiation spot, or more specifically, a rounded rectangle irradiation spot, thereby maximizing the fit to the treatment area (working platform). Further, as... Figure 8 , Figure 9 As shown, the optical system for a blue light therapy device provided by this invention has an optical lens unit 111 that is rectangular in shape from the light-emitting side, possessing a major axis a and a minor axis b, which are perpendicular to each other. Further, in the optical system for a blue light therapy device provided by this invention, the two optical lens units 111 of the optical lens assembly 110 are mirror-symmetrically arranged along the minor axis b. To achieve a clear illumination boundary in the treatment area, the long side boundary of the treatment area is determined by the minor axis b of the lens. Therefore, the two optical lens units 111 employ a polarizing design along the minor axis b, creating a significant difference in brightness between the treatment area and the non-treatment area. The optical lens unit 111 achieves large-angle light amplification along its major axis a and small-angle polarization along its minor axis b.

[0042] To achieve uniform irradiance, the two optical lens units 111 of the optical lens assembly 110 are mirror-symmetrically arranged along the minor axis b to obtain a symmetrical and uniform effect. For optimal therapeutic effect, the optical system for a blue light therapy device provided by this invention includes an integrated optical lens group 100 composed of multiple optical lens assemblies 110, which are arranged in a linear array along the major axis a. This linear array of mirror-symmetrical optical lens assemblies 110 achieves a sufficiently high radiation intensity. Specifically, in the optical system for a blue light therapy device provided by this invention, the cross-section of the optical lens unit 111 along the major axis a is shaped like an "n". Specifically, in the optical system for a blue light therapy device provided by this invention, the cross-section of the optical lens unit 111 along the minor axis b is shaped like an "n". Specifically, in the optical system for a blue light therapy device provided by the present invention, the lens thickness of the optical lens unit 111 on the side closer to the center of the treatment area is greater than the lens thickness on the side farther from the center of the treatment area; that is, the lens thickness of the optical lens unit 111 is thicker on the side closer to the center of the treatment area and thinner on the side closer to the edge of the treatment area. Specifically, in the optical system for a blue light therapy device provided by the present invention, the mirror surface on the light-incident side of the optical lens unit 111 is an inwardly concave free-form optical surface, and the mirror surface on the light-exit side of the optical lens unit 111 is an outwardly convex free-form optical surface. Preferably, in the optical system for a blue light therapy device provided by the present invention, the treatment area is a rectangular treatment area, and the treatment light source is located directly above the center of the treatment area. Preferably, in the optical system for a blue light therapy device provided by the present invention, the treatment light source is an LED light source.

[0043] This invention provides an optical system with a clearly defined rectangular light spot for treating infantile jaundice using a blue light therapy device. The treatment spot area is precisely and uniformly radiated across the treatment area, achieving an effective therapeutic effect. This not only avoids the problem of excessive coverage by large circular light spots in existing technologies (which resemble the circumcircle of the rectangular treatment area), resulting in excessive light spillage, low utilization, and light pollution, but also avoids the issue of multiple circular light spots failing to achieve a rectangular illumination area, and the resulting dark areas and uncovered corners when splicing inscribed circles. Furthermore, it avoids the significant brightness difference and poor uniformity between overlapping and non-overlapping areas caused by spot splicing in existing technologies. This invention achieves effective illumination over a large area with a smaller light-emitting unit, unlike traditional jaundice therapy devices that require a large lamp body to achieve a large illumination spot, thus greatly improving ease of use. This invention is used in blue light therapy devices to achieve an approximately rectangular lighting effect. The lighting effect is uniform and the boundaries are clear. Unlike traditional multi-spot superposition schemes, the final irradiated light will overflow or the treatment area will have uneven brightness. This invention does not produce stray light that overflows into the environment and there is no glare pressure in the environment where it is used.

[0044] The relevant structural parameters of the optical lens unit 111 of the present invention can be designed by those skilled in the art based on the size of the rectangular treatment area, the height of the treatment light source from the treatment area, and the performance requirements of iso-illuminance in the treatment area. For example, based on the geometric relationship in optics: I=E*d^2 (I is the point light intensity, E is the point illuminance, and d is the irradiation distance), combined with the performance requirements of iso-illuminance in the entire treatment area, the emission angle of the optical lens in the long axis a direction can be calculated separately. This angle can be divided into N equal parts, and after differentiation, the light intensity distribution curve at each angle can be obtained. After obtaining the light intensity distribution curve, by selecting the appropriate lens material, the corresponding free optical curves of the incident and emitting sides can be optimized and combined with the lens structure in the long axis a direction. Furthermore, in order to enhance the clear boundary effect of the irradiation area, the short... The light intensity bias design is achieved in the direction of axis b. Similarly, the light intensity curve is obtained based on the geometric model and the relationship I=E*d^2. By combining the selected materials, the lens structure composed of the free optical curves of the light-incident side and the light-outcident side can be obtained. By combining the free optical curves of the light-incident side and the light-outcident side generated in different directions, the free optical surfaces of the light-incident side and the light-outcident side can be obtained, thus obtaining a closed lens structure. Then, the optical lens combination 110 is formed by mirror symmetry in the direction of the short axis b to obtain structural symmetry, thereby achieving a symmetrical relationship of light intensity distribution, so as to obtain a uniform illumination effect in the treatment area.

[0045] This invention calculates the position of the normal by establishing a geometric relationship between light rays emitted from a light source at different angles and the target angle of each ray, thereby finding the tangent point. Numerous tangent points are connected to form a curve. (The normal is perpendicular to the tangent; finding the normal leads to the tangent point). In other words, connecting the tangent points on a cut surface with a curve yields a free curve for that cut surface. Multiple cut surfaces at different angles result in multiple free curves; stitching these free curves together creates a freeform surface.

[0046] Specifically, to obtain a light spot that illuminates only the treatment area, a near-rectangular light spot must be designed. Correspondingly, a near-rectangular freeform lens must be designed, with the surface shape of both the long and short sides controlled to achieve the desired light distribution. For example... Figure 7 As shown, firstly, the length L1 and width L2 of the treatment area are obtained. The treatment light source is located directly above the center of the rectangular treatment area. The placement height H of the treatment light source from the treatment area is obtained, which yields the maximum emission angle in directions such as L1 and L2. Based on this, a mathematical geometric model is established, and the emission angle is divided into N equal parts, as shown below. Figure 10 As shown. Then, the light intensity distribution curve in the L1 direction can be obtained through the relationship I=E*d^2, as shown. Figure 11 As shown, its light intensity distribution curve is batwing-shaped. Based on the light intensity distribution curve in the L1 direction, and combined with the selected lens material, the corresponding free optical curve S2 on the incident side and the free optical curve S1 on the exiting side can be optimized. Thus, the free optical curve S2 on the incident side and the free optical curve S1 on the exiting side are combined to form a lens structure along the long axis a, as shown... Figure 12 As shown.

[0047] Similarly, to achieve light intensity bias design in the short axis bL2 direction, the emission angle in the L2 direction is divided into N equal parts, such as... Figure 12 As shown, the light intensity curve is also obtained based on the geometric model and the relationship I=E*d^2, as follows. Figure 14 As shown. Based on the light intensity distribution curve along the L2 direction, and combined with the selected lens material, the corresponding free optical curve S4 on the incident side and the free optical curve S3 on the exiting side can be optimized. Thus, the free optical curve S4 on the incident side and the free optical curve S3 on the exiting side are combined to form a lens structure along the long axis a, as shown. Figure 15 As shown. To further optimize, the tangential direction between directions L1 and L2 is also divided into N geometric relationships, as follows: Figure 16As shown, the free optical curves of the incident and exit sides from different directions are then combined to obtain the corresponding free optical surfaces of the incident and exit sides, resulting in the closed lens structure of the optical lens unit 111. To achieve uniform irradiance, the two optical lens units 111 of the optical lens assembly 110 are mirror-symmetrically arranged along the minor axis b to achieve a symmetrical and uniform effect, as shown... Figure 17 As shown, symmetrical light intensity distribution is achieved, such as... Figure 18 As shown. To achieve a better therapeutic effect, the optical system for a blue light therapy device provided by this invention includes a light adjustment component 100 comprising an integrated optical lens group. The integrated optical lens group consists of multiple optical lens assemblies 110, which are arranged in a linear array along the long axis a. By linearly arranging multiple mirror-symmetric optical lens assemblies 110, a sufficiently large radiation intensity can be obtained, such as... Figure 5 , Figure 6 As shown. Figure 19 As shown, based on the isoilluminance test results, the red circle represents the 10% isoilluminance line, and the green circle represents the 80% isoilluminance line. The final treatment spot uniformity reached over 0.8. The figure shows the maximum illuminance at the center as 100%.

[0048] In summary, this invention provides an optical system with a clearly defined rectangular light spot for treating infantile jaundice using a blue light therapy device. The treatment spot area is precisely and uniformly radiated across the treatment area, achieving an effective therapeutic effect. This not only avoids the excessive coverage of large circular light spots in existing technologies, which, as the outer circle of the rectangular treatment area, results in excessive light spillage, leading to low utilization and light pollution, but also avoids the situation in existing technologies where multiple circular light spots, when pieced together, cannot achieve a perfectly rectangular illumination area. Furthermore, it avoids the issues of dark areas and uncovered corners resulting from splicing in inner circles. It also avoids the large brightness differences and poor uniformity in overlapping and non-overlapping areas caused by spot splicing in existing technologies. This invention achieves effective illumination over a large area with a smaller light-emitting unit, unlike traditional jaundice therapy devices that require a large lamp body to achieve a large illumination spot, thus greatly improving ease of use. This invention is used in blue light therapy devices to achieve an approximately rectangular lighting effect. The lighting effect is uniform and the boundaries are clear. Unlike traditional multi-spot superposition schemes, the final irradiated light will overflow or the treatment area will have uneven brightness. This invention does not produce stray light that overflows into the environment and there is no glare pressure in the environment where it is used.

[0049] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A light adjustment component, characterized in that, The system includes an optical lens assembly (110), which includes a pair of optical lens units (111). The two optical lens units (111) of the pair of optical lens units (111) are arranged in a mirror symmetrical manner. The light spot projected onto the treatment area by the light adjustment component (100) is rectangular. The optical lens unit (111) is rectangular in shape from the perspective of the light-emitting side. Specifically, the optical lens unit (111) is rounded rectangular in shape from the perspective of the light-emitting side. It has a major axis (a) and a minor axis (b). The major axis (a) and the minor axis (b) are perpendicular to each other. The cross-section of the optical lens unit (111) in the direction of the major axis (a) is "n" shaped. The cross-section of the optical lens unit (111) in the direction of the minor axis (b) is "n" shaped. The lens thickness of the side of the optical lens unit (111) closer to the center of the treatment area is greater than the lens thickness of the side farther from the center of the treatment area.

2. The light adjustment component according to claim 1, characterized in that, The two optical lens units (111) of the optical lens assembly (110) are arranged in a mirror-symmetric manner along the minor axis (b).

3. The light adjustment component according to claim 2, characterized in that, The light adjustment component (100) includes an integrated optical lens group, which is composed of multiple optical lens combinations (110) arranged in a linear array along the long axis (a).

4. The light adjustment component according to claim 3, characterized in that, The light-incident side of the optical lens unit (111) is a concave free-form optical surface, and the light-exit side of the optical lens unit (111) is a convex free-form optical surface.

5. An optical system for a blue light therapy device, comprising a therapeutic light source, characterized in that, It also includes a light adjustment component (100) as described in any one of claims 1-4, wherein the light from the treatment light source is projected onto the treatment area through the light adjustment component (100) in a rectangular shape.

6. The optical system for a blue light therapy device according to claim 5, characterized in that, The treatment area is rectangular, and the treatment light source is located directly above the center of the treatment area.

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