Outer optical cover for long and narrow channel illumination
By designing the inclined plane region of the outer optical cover and the microlens array in the narrow channel lighting, the problems of uneven lighting and glare were solved, achieving efficient illuminance uniformity and light energy directionality, thus meeting the actual needs of the farm.
Patent Information
- Application Number
- CN202511280899.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2025-11-07
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing lighting solutions are difficult to achieve effective directional lighting on the facade of narrow passageways, resulting in low facade illuminance utilization, limited improvement in uniformity, and problems such as overly bright cages near the light fixtures and darker facades on the passageway sides.
Design an external optical cover, including forming oblique plane regions on both sides of the shell, combining anisotropic elliptical microlens array and azimuth-selective refractive prism strip, and controlling the lateral and longitudinal angles of light through synergistic design to preferentially directional illuminate the corridor facade.
Without increasing system power and lamp density, it significantly improves the uniformity of facade illuminance, alleviates excessive brightness and abrupt contrast changes on both sides near the lamps, controls lateral high-angle glare, and meets the needs of farming behavior and animal welfare.
Smart Images
Figure CN120907111A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of illumination optics, in particular to an outer optical cover for long and narrow passage illumination. BACKGROUND
[0002] The stacked cage chicken house is usually in a long strip layout, has multiple layers (such as 3-5 layers), multiple columns (such as 4-6 columns), a long and narrow passage, a limited layer height (about 0.5-0.7 m per layer), and the like. The lamps are arranged longitudinally along the passage, and the chickens mainly obtain illumination through the vertical surface of the cage facing the passage, while the ground horizontal illuminance has less effect on the production behavior. This scenario presents different requirements for the light distribution than general indoor lighting: the illuminance and uniformity of the vertical surface of the passage (within the height range of the chickens' activity and feeding) should be prioritized, while the over-brightness and glare of the cages on both sides near the lamp should be suppressed.
[0003] Defects of existing lighting solutions:
[0004] 1. General diffuser cover / ground glass cover: wide light distribution is obtained through surface roughening or bulk scattering, which can weaken the hot spot to some extent, but a large amount of energy is lost in the lateral and ground directions, making it difficult to achieve effective "directional lighting" in the vertical surface direction of the passage, resulting in low utilization rate of vertical surface illuminance and limited uniformity improvement.
[0005] 2. Symmetrical lens / cover (such as spherical, cylindrical, or simple aspherical): the design goal is mainly to achieve horizontal plane uniformity, lacking control of azimuthal angle selectivity, often resulting in over-brightness of cages on both sides near the lamp and dark vertical surface on the sides of the passage, and large illuminance gradient in the up-down height direction.
[0006] 3. Single microstructure light guide (such as regular microlens array or prism film): usually achieves angle shaping in one dimension (lateral or longitudinal), lacks coordination with the outer shape geometry, and is difficult to simultaneously consider "lateral suppression" and "longitudinal direction", which is prone to produce glare at high lateral angles or form striped non-uniformity in the longitudinal direction.
[0007] 4. "Stacking" solution by increasing power or density of lamp positions: although it can improve the average illuminance, it will amplify the over-brightness, glare, and energy consumption near the lamp, and impose higher requirements on electrical and heat dissipation, which is not in line with the energy saving and animal welfare orientation. SUMMARY
[0008] The main purpose of the present application is to solve the problems mentioned above.
[0009] To solve the above problems, the present application proposes an outer optical cover for long and narrow passage illumination, comprising:
[0010] The outer optical cover is a convex shell relative to the optical axis, and each of the left and right sides forms a slanted plane transversely, and the two slanted planes are symmetrically arranged relative to the optical axis; the reference plane of the slanted plane is defined as the optical mother plane without microstructure in this area, and the included angle between the outer normal of the reference plane and the transverse positive direction is configured to deviate the light emitted through this area in the transverse direction to the passage direction;
[0011] The outer surface of the outer optical cover includes a central arc surface area and left and right slanted plane areas:
[0012] An anisotropic elliptical microlens array is formed on the central arc surface area, and the long axis of the elliptical microlens array is aligned along the passage direction during assembly to expand the emission angle in the passage longitudinal direction and converge the emission angle in the transverse direction;
[0013] An azimuth-selective refractive prism band is formed on each of the left and right slanted plane areas to suppress high-angle emission in the transverse direction and guide the light beam to face the passage vertical surface;
[0014] The elliptical microlens array is an anisotropic structure, including regularly or quasi-randomly arranged microlens units;
[0015] The refractive prism bands arranged on the left and right slanted plane areas extend in the transverse direction and are used to selectively regulate the emission angle distribution within the azimuth angle range;
[0016] The combination of the structures is used for narrow passage lighting in cage houses, and is suitable for cage layouts with multiple layers, multiple columns and limited layer height, so that the chickens obtain light through the passage vertical surface.
[0017] In an embodiment, the included angle between the outer normal of the reference plane of the slanted plane and the transverse positive direction is 10°-25°.
[0018] In an embodiment, the elliptical axis ratio of the elliptical microlens array is 1.6-2.2, the feature size of the microlens unit is 0.9-1.3mm×0.5-0.8mm, and the vertex height is 40-80μm.
[0019] In an embodiment, the elliptical microlens is a near-spherical surface or a weak aspherical surface, the conic constant k ∈ [0, -0.6], and each microlens is provided with a rounded corner R ≥ 10μm.
[0020] In an embodiment, the bandwidth of the refractive prism band is 6-12mm, the prism vertex angle is 80°-100°, and the pitch is 0.6-1.2mm.
[0021] In an embodiment, a transition round corner is provided between the left and right slanted plane areas and the central arc surface area, and the transition radius R = 0.5-2.0mm.
[0022] In an embodiment, the refractive prism band only covers the area corresponding to the lateral azimuth angle ±40°-±60° of the outer optical cover, and the top and bottom areas are not provided with the prism band.
[0023] In an embodiment, the outer optical cover is made of transparent PMMA or PC, and the inner surface is a polished or weakly matt surface with a surface roughness Ra=50-150 nm.
[0024] In an embodiment, the outer edge of the outer optical cover is provided with a mounting direction mark, so that the major axis of the elliptical microlens array is aligned in the channel direction during installation.
[0025] In an embodiment, the elliptical microlens array adopts a quasi-random perturbation distribution with a position and / or size perturbation amplitude of ±5%-±10% to suppress diffraction artifacts and color edges.
[0026] In the case of a long and narrow channel and a stacked cage chicken house corridor, an outer optical cover is constructed, which can preferentially direct light energy to the vertical lighting area of the corridor side cage under the premise of not increasing the system power and lamp density.
[0027] The vertical illuminance is high in the azimuth and height directions, which significantly relieves the over-brightness and contrast mutation on both sides of the near lamp.
[0028] While controlling the lateral high-angle glare and invalid dispersion, good light efficiency and mass manufacturability are maintained.
[0029] The technical solution of the present application cooperates the "shell geometric orientation" and "partition microstructure" to control the lateral exit angle in an azimuth-selective manner, and at the same time, the longitudinal width is widened, which breaks through the bottleneck that only diffusion or single microstructure can hardly balance uniformity and glare.
[0030] The technical solution of the present application preferentially distributes light energy to the vertical lighting area, which is different from the traditional indoor lighting paradigm which takes horizontal plane uniformity as the target, and highlights the actual needs of meeting breeding behavior and animal welfare. BRIEF DESCRIPTION OF DRAWINGS
[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0032] Figure 1 is a schematic diagram of the three-dimensional assembly structure of the outer optical cover of the present application;
[0033] Figure 2is the assembled front view schematic diagram of the outer optical cover of the present application;
[0034] Figure 3 is the perspective view schematic diagram of the outer optical cover of the present application;
[0035] Figure 4 is the front view schematic diagram of the outer optical cover of the present application;
[0036] Figure 5 is the second perspective view schematic diagram of the outer optical cover of the present application.
[0037] The reference signs are explained as follows:
[0038] 1, outer optical cover; 2, central arc surface; 3, inclined plane. DETAILED DESCRIPTION
[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0040] In order to achieve the above-mentioned application purposes, as shown in the drawings, Figures 1-5 the present application provides that the outer optical cover is an outer convex shell relative to the optical axis, and each of the left and right sides forms an inclined plane along the transverse direction. The two inclined planes are symmetrically arranged relative to the optical axis. The reference surface of the inclined plane is defined as the optical mother surface when the region is not provided with a microstructure. The included angle between the outer normal of the inclined plane and the positive direction of the transverse direction is configured to deviate the light emitted through the region in the transverse direction to the passage direction, but the included angle is not limited to a specific single value.
[0041] The outer surface of the outer optical cover includes a central arc surface region and left and right inclined plane regions:
[0042] An anisotropic elliptical microlens array is formed on the central arc surface region. The long axis of the elliptical microlens array is aligned along the passage direction during assembly, so as to expand the emission angle in the passage longitudinal direction and converge the emission angle in the transverse direction.
[0043] Azimuth-selective refractive prism bands are respectively formed on the left and right inclined plane regions, so as to suppress high-angle emission in the transverse direction and guide the light beam to face the passage vertical surface.
[0044] The elliptical microlens array is an anisotropic structure, which includes regularly or quasi-randomly arranged microlens units.
[0045] The refractive prism bands arranged on the left and right inclined plane regions extend in the transverse direction and are used for selectively regulating the emission angle distribution in the azimuth angle range.
[0046] The structural combination is used for lighting of a narrow corridor in a cage house, and is suitable for cage layout with multiple layers, multiple columns and limited layer height, so that chickens obtain light through a corridor facade.
[0047] As a further limitation:
[0048] The shell shape: relative to the optical axis, the outer convex shell forms symmetrical inclined areas (referred to as "inclined plane areas") in the left and right sides along the transverse direction, and the central part is a continuous curved surface area.
[0049] Functional division: the central curved surface area is responsible for longitudinal angle expansion and transverse convergence, forming a long strip-shaped effective light spot along the strike direction, and the inclined plane area undertakes transverse energy deflection and high-angle suppression, and migrates energy from the two sides of the near lamp to the corridor facade.
[0050] The central curved surface microstructure cooperates with the partition microstructure: an anisotropic elliptical microlens array is arranged, the long axis of the ellipse is aligned with the channel direction during installation, realizing bidirectional angle shaping of longitudinal expansion and transverse convergence; the microlens can be a near-spherical surface or a weak aspherical surface, and quasi-random perturbation can be used to suppress diffraction artifacts.
[0051] The microstructure of the inclined plane area: a direction-selective refractive prism band is arranged to threshold inhibit and guide deflection of transverse high-angle emission, reduce glare and invalid leakage, and direct the light beam to the effective height band of the corridor facade.
[0052] Orientation and installation alignment: by setting installation direction indicators on the outer edge, the elliptical long axis of the microlens array is ensured to be consistent with the channel direction, and the inclined plane area faces the corridor side, ensuring that the structure functions, and the optical cover is installed in cooperation with a linear light source or a strip-shaped lamp, so that the light distribution long axis expands along the corridor direction.
[0053] Parameters and dependent claims
[0054] The independent claims in this technical document do not contain rigid numerical limitations, and only the core idea is protected by structural and functional description;
[0055] The following dependent claims introduce parameter intervals to converge the embodiments, but the independent claims are not limited by parameters;
[0056] The angle between the outer normal of the inclined plane reference surface and the transverse direction is located in the range of 10°-25°, the axis ratio, unit size and height parameters of the elliptical microlens array are located in the range of engineering manufacturability, and the bandwidth, top angle and pitch of the prism band fall within the interval conducive to suppressing transverse high angles.
[0057] The specific working principle is as follows,
[0058] Transverse suppression and energy migration: the combination of the left and right inclined planes with the base plane orientation of the prism belt refracts and limits the transverse high-angle exit, making the illumination peak near the two sides of the lamp lower, and part of the energy is folded to the passageway facade.
[0059] Longitudinal orientation and expansion: the central arc surface superimposes the anisotropic elliptical microlens array, forming a larger expansion angle in the longitudinal direction, elongating the effective spot along the passageway direction, and reducing the illumination fluctuation along the way; in the transverse direction, it maintains relative convergence to avoid invalid overflow.
[0060] Uniformity improvement mechanism: through the "peak clipping" angle shaping, the azimuth and height of the illumination in the passageway facade area are smoothed in two dimensions; quasi-random disturbance disperses the regular interference caused by stripes, further improving visual uniformity and comfort.
[0061] For ease of understanding, the following is further defined;
[0062] Materials and forming: the optical cover is made of transparent PMMA or PC, and the inner surface is polished or weakly extinguished; the microstructure is formed by mold etching or electrospark / ultra-precision cutting; the edges of the microlens are rounded to improve wear resistance and anti-pollution.
[0063] Structural details: a transition fillet is provided between the central arc surface and the inclined plane to reduce stress and the probability of forming defects; the prism belt covers the transverse middle-high azimuth angle area of the outer optical cover, and the top and bottom areas are not provided with prisms to retain the longitudinal expansion.
[0064] Installation scenario: linear lamps are arranged along the passageway direction, and the long axis of the optical cover is aligned with the passageway; under different floor heights and column distances, the best uniformity and glare balance are obtained by selecting the parameter intervals in the dependent claims.
[0065] Testing and evaluation: on the facade of the cage position on both sides of the center line of the passageway, the illumination is sampled at heights of 0.2-3.0 m and several measuring points along the way; the differences in facade illumination uniformity (such as minimum / maximum ratio, uniformity index) and glare index (subjective evaluation or threshold angle method) between the cover without microstructure, the single diffusion cover and the cover of the present application are compared.
[0066] In this technical solution, the "shell geometric orientation" and "partitioned microstructure" are designed in coordination to control the transverse exit angle in an azimuth-selective manner, while expanding in the longitudinal direction, breaking the bottleneck that only diffusion or a single microstructure can not balance uniformity and glare. The light energy is distributed with the facade lighting area as the priority target surface, which is different from the traditional indoor lighting paradigm that takes horizontal plane uniformity as the target, and highlights the actual needs of meeting breeding behavior and animal welfare.
[0067] Specifically, the included angle between the outer normal of the inclined plane reference surface and the transverse positive direction is 10°-25°.
[0068] Specifically, the elliptical micro-lens array has an elliptical axis ratio of 1.6-2.2, a feature size of the micro-lens unit of 0.9-1.3mm x 0.5-0.8mm, and a vertex height of 40-80μm.
[0069] CLAIM 4
[0070] Specifically, the elliptical micro-lens is a near-spherical or weak aspherical surface, with a conic constant k∈[0,-0.6], and each micro-lens is provided with a rounded corner R≥10μm.
[0071] Specifically, the refractive prism band has a band width of 6-12mm, a prism vertex angle of 80°-100°, and a pitch of 0.6-1.2mm.
[0072] Specifically, a transition radius R=0.5-2.0mm is provided between the left and right inclined plane regions and the central arc surface region.
[0073] Specifically, the refractive prism band only covers the region corresponding to a lateral azimuth angle of ±40°-±60° of the outer optical cover, and the top and bottom regions are not provided with the prism band.
[0074] Specifically, the outer optical cover is made of transparent PMMA or PC, and the inner surface is a polished or weakly-extinguished surface with a surface roughness Ra=50-150nm.
[0075] Specifically, an installation direction mark is provided on the outer edge of the outer optical cover, so that the major axis of the elliptical micro-lens array is aligned in the channel direction during installation.
[0076] Specifically, the elliptical micro-lens array adopts a quasi-random perturbation distribution, with a position and / or size perturbation amplitude of ±5%-±10%, to suppress diffraction artifacts and color fringes.
[0077] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.
Claims
1. An outer optical cover for the illumination of a long and narrow passage, characterized in that, The outer optical cover is a convex shell relative to the optical axis, and each of the left and right sides of the outer optical cover is formed with a slanted plane along the transverse direction, and the two slanted planes are symmetrically arranged relative to the optical axis; the reference plane of the slanted plane is defined as the optical mother plane without microstructure in the area, and the included angle between the outer normal of the slanted plane and the positive direction of the transverse direction is configured to deviate the light emitted through the area to the passage direction in the transverse direction; The outer surface of the outer optical cover comprises a central arc surface area and left and right slanted plane areas: An anisotropic elliptical microlens array is formed on the central arc surface area, and the major axis of the elliptical microlens array is aligned along the passage direction in the assembly to expand the emission angle in the passage longitudinal direction and converge the emission angle in the transverse direction; A direction-selective refractive prism band is formed on each of the left and right slanted plane areas to suppress the high-angle emission in the transverse direction and guide the light beam to face the passage vertical surface; The elliptical microlens array is an anisotropic structure, comprising regularly or quasi-randomly arranged microlens units; The refractive prism bands arranged on the left and right slanted plane areas extend along the transverse direction and are used for selectively regulating the emission angle distribution within a range of azimuth angles; The combination of the structures is used for the lighting of the narrow passage in the cage house, and is suitable for cage layouts with multiple layers, multiple columns and limited layer height, so that the chickens obtain light through the passage vertical surface. The included angle between the outer normal of the reference plane of the slanted plane and the positive direction of the transverse direction is 10°-25°.
2. An outer optical cover for the illumination of a long and narrow passage according to claim 1, characterized in that, The elliptical axis ratio of the elliptical microlens array is 1.6-2.2, the characteristic size of the microlens unit is 0.9-1.3mm×0.5-0.8mm, and the vertex height is 40-80μm.
3. An outer optical cover for the illumination of a long and narrow passage according to claim 2, characterized in that, The elliptical microlens is a near-spherical surface or a weak aspherical surface, the conic constant k is in the range of [0,-0.6], and each microlens is provided with a rounded corner R≥10μm.
4. An outer optical cover for the illumination of a long and narrow passage according to claim 3, characterized in that, The bandwidth of the refractive prism band is 6-12mm, the prism vertex angle is 80°-100°, and the pitch is 0.6-1.2mm.
5. An outer optical cover for the illumination of a long and narrow passage according to claim 4, characterized in that, A transition round corner is provided between the left and right slanted plane areas and the central arc surface area, and the transition radius R is 0.5-2.0mm.
6. An outer optical cover for the illumination of a long and narrow passage according to claim 5, characterized in that, The refractive prism band only covers the area of the outer optical cover corresponding to the transverse azimuth angle ±40°-±60 7. An outer optical cover for the illumination of a long and narrow passage according to claim 6, characterized in that, °, and the top and bottom areas are not provided with the prism band. The outer optical cover is made of transparent PMMA or PC, and the inner surface is a polished or weakly matt surface with a surface roughness Ra of 50-150nm.
8. An outer optical cover for the illumination of a long and narrow passage according to claim 7, characterized in that, An installation direction mark is provided on the outer edge of the outer optical cover, so that the major axis of the elliptical microlens array is aligned along the passage direction in the installation.
9. An outer optical cover for the illumination of a long and narrow passage according to claim 8, characterized in that, The elliptical microlens array adopts quasi-random perturbation distribution, and the position and / or size perturbation amplitude is ±5%-±10% to suppress diffraction artifacts and color edges.
10. An outer optical cover for the illumination of a long and narrow passage according to claim 9, characterized in that,