Projection lighting lens and lighting equipment

Abstract

The present invention discloses a projection lighting lens and lighting equipment, including: a first lens element, which is a positive lens and includes a first plano-convex lens; a second lens element, which is a positive lens and includes a double lens; a third lens element, which is a positive lens and includes a meniscus lens; a fourth lens element, which is a negative lens and includes a double concave lens; a fifth lens element, which is a positive lens and includes a second plano-convex lens; wherein the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element are arranged in sequence from the object plane to the image plane along the light propagation direction, and the projection lighting lens is used to project the light of the projection object at the object plane through the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element to the image plane. It can be seen that the present invention can improve the brightness and uniformity of the projection image of the projection lighting lens by improving the structure of the projection lighting lens, thereby improving its projection effect.

Description

Technical Field

[0001] The present invention relates to the technical field of projection lighting, and in particular to a projection lighting lens and lighting equipment. Background Art

[0002] In scenes with lighting needs such as photography and stage, projection lighting lenses are often used, and a shaping and focusing device is usually used to focus the light emitted by photographic lighting fixtures or stage lighting fixtures into a sufficiently small light spot. The light spot is left empty or a pattern piece is placed. The projection lighting lens is placed behind the shaping and focusing device so that the object focal plane and the light spot and pattern piece coincide with each other. The projection lighting lens projects the light spot or pattern piece onto the illuminated surface to form a projection image to achieve special lighting effects.

[0003] However, it is found in practice that when using existing projection lighting lenses to achieve special lighting effects, there are usually problems such as low brightness and low uniformity of the projected image, which is not conducive to improving the projection effect of the projection lighting lens.

[0004] It can be seen that how to improve the brightness and uniformity of the projection image of the projection illumination lens, and thus improve its projection effect, is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The present invention provides a projection lighting lens and lighting equipment, which can improve the brightness and uniformity of the projection image of the projection lighting lens by improving the structure of the projection lighting lens, thereby improving the projection effect thereof.

[0006] In order to solve the above technical problems, a first aspect of an embodiment of the present invention discloses a projection illumination lens, wherein the projection illumination lens comprises:

[0007] A first lens element, wherein the first lens element is a positive lens and comprises a first plano-convex lens;

[0008] a second lens element, wherein the second lens element is a positive lens and the second lens element comprises a doublet;

[0009] a third lens element, wherein the third lens element is a positive lens and comprises a meniscus lens;

[0010] a fourth lens element, wherein the fourth lens element is a negative lens and comprises a biconcave lens;

[0011] a fifth lens element, wherein the fifth lens element is a positive lens and comprises a second plano-convex lens;

[0012] Among them, the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element are arranged in sequence from the object plane to the image plane along the light propagation direction, and the projection illumination lens is used to project the light passing through the projection object at the object plane onto the image plane after passing through the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element in sequence.

[0013] As an optional implementation, in the first aspect of the embodiment of the present invention, the surface of the first plano-convex lens facing the object plane is a plane, and the surface of the first plano-convex lens facing the image plane is a convex surface and its radius is a negative value;

[0014] The side of the double lens facing the object plane is convex and its radius is positive, and the side of the double lens facing the image plane is convex and its radius is negative;

[0015] The side of the meniscus lens facing the object plane is convex and its radius is positive, and the side of the meniscus lens facing the image plane is concave and its radius is positive;

[0016] The side of the biconcave lens facing the object plane is concave and its radius is negative, and the side of the biconcave lens facing the image plane is concave and its radius is positive;

[0017] A surface of the second plano-convex lens facing the object plane is a plane, and a surface of the second plano-convex lens facing the image plane is a convex surface with a negative radius.

[0018] As an optional implementation, in the first aspect of the embodiment of the present invention, the height of the projection object is less than or equal to 42.5 mm;

[0019] The system focal length of the projection illumination lens is equal to 134.566 mm;

[0020] When the aperture type of the numerical aperture of the projection illumination lens is an object-space cone angle, a half angle of the object-space cone angle is less than or equal to 14°.

[0021] As an optional implementation, in the first aspect of the embodiment of the present invention, the optical power fa1 of the first plano-convex lens is positive;

[0022] The optical power fa2 of the double lens is positive;

[0023] The focal power fa3 of the meniscus lens is positive;

[0024] The focal power fa4 of the biconcave lens is negative;

[0025] The optical power fa5 of the second plano-convex lens is positive.

[0026] As an optional implementation, in the first aspect of the embodiment of the present invention, the optical power fa1 of the first plano-convex lens is 0.006007±0.0005;

[0027] The optical power fa2 of the double lens is 0.006357±0.0005;

[0028] The focal power fa3 of the meniscus lens is 0.000644±0.0005;

[0029] The focal power fa4 of the biconcave lens is -0.017491±0.002;

[0030] The optical power fa5 of the second plano-convex lens is 0.009191±0.0005.

[0031] As an optional implementation, in the first aspect of the embodiments of the present invention, the radius of the side of the meniscus lens facing the object plane is less than or equal to the radius of the side of the meniscus lens facing the image plane, and / or the ratio of the radius of the side of the meniscus lens facing the image plane to the radius of the side of the meniscus lens facing the object plane satisfies a first preset ratio condition;

[0032] and / or,

[0033] The ratio of the radius of the side of the biconcave lens facing the image plane to the radius of the side of the biconcave lens facing the object plane satisfies a second preset ratio condition;

[0034] and / or,

[0035] The radius of the side of the dual lens facing the image plane is greater than the absolute value of the radius of the side of the dual lens facing the object plane, and / or the ratio of the radius of the side of the dual lens facing the image plane to the radius of the side of the dual lens facing the object plane satisfies a third preset ratio condition.

[0036] As an optional implementation, in the first aspect of the embodiment of the present invention, the refractive index nd1 of the first plano-convex lens is 1.6204±0.005, and the scattering coefficient vd1 thereof is 60.37±0.01; and / or,

[0037] The refractive index nd2 of the double lens is 1.6204±0.005, and the scattering coefficient vd2 thereof is 60.37±0.01; and / or,

[0038] The refractive index nd3 of the meniscus lens is 1.6727±0.005, and the scattering coefficient vd3 thereof is 32.18±0.01; and / or,

[0039] The refractive index nd4 of the biconcave lens is 1.7552±0.005, and the scattering coefficient vd4 thereof is 7.55±0.01; and / or,

[0040] The refractive index nd5 of the second plano-convex lens is 1.6385±0.005, and the scattering coefficient vd5 is 55.47±0.01.

[0041] As an optional implementation, in the first aspect of the embodiment of the present invention, for any lens in the projection illumination lens, the lens edge thickness corresponding to the lens is within a preset thickness range, and the center thickness corresponding to the lens is greater than or equal to a preset thickness threshold;

[0042] Among them, the preset thickness range is 3mm to 5mm, and the preset thickness threshold is 2mm.

[0043] As an optional implementation, in the first aspect of the embodiment of the present invention, in the direction from the object plane to the image plane, the air distance values ​​between a side of any preceding lens facing the image plane and a side of a subsequent adjacent lens of the preceding lens facing the object plane respectively satisfy corresponding preset distance conditions;

[0044] And, the distance value from the side of the first plano-convex lens facing the object plane to the object plane is less than a preset front working distance threshold; the distance value from the side of the second plano-convex lens facing the image plane to the image plane is greater than or equal to a preset rear working distance threshold, and the distance value from the side of the second plano-convex lens facing the image plane to the image plane is the straight-line distance between the vertex of the side of the second plano-convex lens facing the image plane and the image plane;

[0045] Among them, the preset front working distance threshold is 70mm, and the preset rear working distance threshold is 2500mm.

[0046] As an optional implementation, in the first aspect of the embodiment of the present invention, the light output field angle of the projection illumination lens is 36°.

[0047] A second aspect of an embodiment of the present invention discloses a lighting device, comprising a lighting device body and a projection lighting lens arranged on the lighting device body, wherein the projection lighting lens is any projection lighting lens described in the first aspect of the present invention.

[0048] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0049] The embodiment of the present invention can realize the projection of light passing through the projection object onto the image plane based on the structural design of the projection illumination lens by sequentially arranging the first plano-convex lens, the double lens, the meniscus lens, the double concave lens and the second plano-convex lens from the object plane to the image plane, and the projection image projected onto the image plane is clear, high in brightness and high in uniformity, which is conducive to improving the projection effect of the projection illumination lens. In addition, the projection illumination lens in the embodiment of the present invention has better imaging capability for projection objects with larger linear diameters, which is conducive to improving the utilization rate of light by the optical system or optical equipment (such as camera equipment, stage lighting equipment, etc.) used by the projection illumination lens, and further helps to improve the user experience of the projection illumination lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0051] Figure 1 It is a structural schematic diagram of a projection illumination lens disclosed in an embodiment of the present invention;

[0052] Figure 2 It is a schematic diagram of the optical path layout of a projection illumination lens disclosed in an embodiment of the present invention;

[0053] Figure 3 It is a schematic diagram of analysis results corresponding to field curvature and distortion and dispersion conditions at different object heights in an imaging quality analysis disclosed in an embodiment of the present invention;

[0054] Figure 4 It is a schematic diagram of analysis results corresponding to the uniformity of the light spot and the geometric MTF of the full-field polychromatic light in an imaging quality analysis disclosed in an embodiment of the present invention;

[0055] Figure 5 It is a schematic diagram of analysis results corresponding to field curvature and distortion and dispersion conditions at different object heights in another imaging quality analysis disclosed in an embodiment of the present invention;

[0056] Figure 6 It is a schematic diagram of analysis results corresponding to spot uniformity and full-field polychromatic light geometric MTF in another imaging quality analysis disclosed in an embodiment of the present invention.

[0057] In the figure: 10, projection illumination lens; 101, first lens element; 1011, first plano-convex lens; 102, second lens element; 1021, double lens; 103, third lens element; 1031, meniscus lens; 104, fourth lens element; 1041, double concave lens; 105, fifth lens element; 1051, second plano-convex lens. DETAILED DESCRIPTION

[0058] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or equipment that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or equipment.

[0060] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0061] The present invention discloses a projection lighting lens and a lighting device, which can improve the brightness and uniformity of the projection image of the projection lighting lens by improving the structure of the projection lighting lens, thereby improving the projection effect. Detailed descriptions are given below.

[0062] Embodiment 1

[0063] See also Figure 1 , Figure 1 : is a schematic diagram of the structure of the projection illumination lens disclosed in the embodiment of the present invention. Figure 1 The projection lighting lens described can be applied to lighting equipment. Optionally, the lighting equipment can be a stage lighting equipment or a photographic equipment, which is not limited in the embodiments of the present invention. Figure 1As shown, the projection illumination lens 10 comprises:

[0064] A first lens element 101, wherein the first lens element 101 is a positive lens and includes a first plano-convex lens 1011;

[0065] A second lens element 102, the second lens element 102 is a positive lens, and the second lens element 102 includes a double lens 1021;

[0066] A third lens element 103, the third lens element 103 is a positive lens, and the third lens element 103 includes a meniscus lens 1031;

[0067] A fourth lens element 104, wherein the fourth lens element 104 is a negative lens and includes a biconcave lens 1041;

[0068] The fifth lens element 105 is a positive lens, and the fifth lens element 105 includes a second plano-convex lens 1051.

[0069] Among them, the first lens element 101, the second lens element 102, the third lens element 103, the fourth lens element 104 and the fifth lens element 105 are arranged in sequence from the object plane to the image plane along the light propagation direction, and the projection illumination lens 10 is used to project the light of the projection object at the object plane onto the image plane after passing through the first lens element 101, the second lens element 102, the third lens element 103, the fourth lens element 104 and the fifth lens element 105 in sequence.

[0070] In an embodiment of the present invention, when the projection illumination lens 10 is actually used, the projection illumination lens 10 is behind the projection object, the projection object is closest to the first lens element 101 and the projection object is placed behind the light source. Furthermore, a shaping and focusing device can be provided between the light source and the projection object, and the light source can be a high-power LED integrated light source. Specifically, the light emitted by the light source is focused by the shaping and focusing device and then passes through the projection object. The light passing through the projection object is then projected onto the image plane (also referred to as the projection plane) after passing through the projection illumination lens 10, so as to project the image of the projection object onto the image plane. Furthermore, the projection object can be a pattern piece with a certain shape, which can be adjusted according to the actual needs of projection illumination, and a special lighting effect can be achieved by using a pattern piece with a certain shape.

[0071] Furthermore, in actual applications, there may be multiple projection objects, and different projection objects correspond to different projection shapes. During lighting projection, the lighting device may adaptively select a corresponding projection object or a combination of multiple projection objects according to the special lighting effects and / or application scenarios to be achieved, which is conducive to improving the flexibility of lighting projection and the matching degree between lighting projection and actual needs.

[0072] In the embodiment of the present invention, since a plano-convex lens (one side is flat and the other side is convex) is easy to process, the first lens element 101 and the fifth lens element 105 are respectively configured as plano-convex lenses, which is beneficial to reducing the cost of the projection illumination lens 10.

[0073] The first plano-convex lens 1011 has a surface facing the object plane that is flat, and a surface facing the image plane that is convex and has a negative radius;

[0074] The side of the double lens 1021 facing the object plane is convex and its radius is positive, and the side facing the image plane is convex and its radius is negative;

[0075] The side of the meniscus lens 1031 facing the object plane is convex and its radius is positive, and the side facing the image plane is concave and its radius is positive;

[0076] The biconcave lens 1041 has a concave surface facing the object plane and a negative radius, and a concave surface facing the image plane and a positive radius;

[0077] The second plano-convex lens 1051 has a surface facing the object plane that is a plane, and a surface facing the image plane that is a convex surface with a negative radius.

[0078] It should be noted that: in the optical path meridian cross-section diagram, the first surface of the lens is defined as the surface facing the object surface, and the second surface is defined as the surface facing the image surface. For a non-planar surface, if the center of the circle is on the left side of the surface, the radius of the surface is a negative value, and if the center of the circle is on the right side of the surface, the radius of the surface is a positive value.

[0079] It can be seen that the implementation of the embodiment of the present invention can realize the projection of light passing through the projection object onto the image plane based on the structural design of the projection illumination lens 10, through the first plano-convex lens 1011, the double lens 1012, the meniscus lens 1013, the double concave lens 1014 and the second plano-convex lens 1015 arranged in sequence from the object plane to the image plane, and the projection image projected onto the image plane is clear, high in brightness and high in uniformity, which is conducive to improving the projection effect of the projection illumination lens. In addition, the cost of the projection illumination lens 10 can also be reduced.

[0080] In an optional embodiment, the height of the projection object is less than or equal to 42.5 mm, that is, the maximum diameter of the projection object is 85 mm.

[0081] In this optional embodiment, the system focal length of the projection illumination lens 10 is equal to 134.566 mm, and the light conditions corresponding to F, D, and C are: F light-cyan light, 486.13 nm; D light-yellow light, 587.56 nm, C light-red light, 656.27 nm. And when the aperture type of the numerical aperture of the projection illumination lens 10 is the object cone angle, the half angle of the object cone angle is less than or equal to 14°.

[0082] Further, the focal power fa1 of the first plano-convex lens 1011 is positive, the focal power fa2 of the double lens 1021 is positive, the focal power fa3 of the meniscus lens 1031 is positive, the focal power fa4 of the biconcave lens 1041 is negative, and the focal power fa5 of the second plano-convex lens 1051 is positive. Further still, the focal power fa1 of the first plano-convex lens 1011 is 0.006007±0.0005, the focal power fa2 of the double lens 1021 is 0.006357±0.0005, the focal power fa3 of the meniscus lens 1031 is 0.000644±0.0005, the focal power fa4 of the biconcave lens 1041 is -0.017491±0.002, and the focal power fa5 of the second plano-convex lens (1051) is 0.009191±0.0005. Among them, a positive optical power indicates that the corresponding lens has the function of converging light, and a negative optical power indicates that the corresponding light-transmitting lens has the function of diffusing light.

[0083] Further optionally, the radius of the side of the meniscus lens 1031 facing the object plane is less than or equal to the radius of the side of the meniscus lens 1031 facing the image plane, and / or the ratio of the radius of the side of the meniscus lens 1031 facing the image plane to the radius of the side of the meniscus lens 1031 facing the object plane satisfies a first preset ratio condition. The first preset ratio condition may be that the ratio of the two is equal to 1.016239±0.05.

[0084] Further optionally, the ratio of the radius of the side of the biconcave lens 1041 facing the image plane to the radius of the side of the biconcave lens 1041 facing the object plane satisfies a second preset ratio condition, wherein the second preset ratio condition may be that the ratio of the two is equal to -1.0±0.05.

[0085] Further optionally, the radius of the side of the dual lens 1021 facing the image plane is greater than the absolute value of the radius of the side of the dual lens 1021 facing the object plane, and / or the ratio of the radius of the side of the dual lens 1021 facing the image plane to the radius of the side of the dual lens 1021 facing the object plane satisfies a third preset ratio condition. The third preset ratio condition may be that the ratio of the two is equal to -7.7586±0.5.

[0086] It should be noted that the relationship between the above-mentioned optical focal length and radius can be understood as the shape parameters of the corresponding lenses in the projection illumination lens 10 .

[0087] Further optionally, based on the above shape parameters, the edge thickness of any lens in the projection illumination lens 10 is within a preset thickness range, and the center thickness thereof is greater than or equal to a preset thickness threshold. Still further optionally, the preset thickness range may be 3 mm to 5 mm, and the preset thickness threshold may be 2 mm.

[0088] Further optionally, the material parameters of the corresponding lenses in the projection illumination lens 10 are as follows:

[0089] The refractive index nd1 of the first plano-convex lens 1011 is 1.6204±0.005, and the scattering coefficient vd1 thereof is 60.37±0.01; and / or,

[0090] The refractive index nd2 of the double lens 1021 is 1.6204±0.005, and the scattering coefficient vd2 thereof is 60.37±0.01; and / or,

[0091] The refractive index nd3 of the meniscus lens 1031 is 1.6727±0.005, and the scattering coefficient vd3 thereof is 32.18±0.01; and / or,

[0092] The refractive index nd4 of the biconcave lens 1041 is 1.7552±0.005, and the scattering coefficient vd4 thereof is 7.55±0.01; and / or,

[0093] The refractive index nd5 of the second plano-convex lens 1051 is 1.6385±0.005, and the scattering coefficient vd5 is 55.47±0.01.

[0094] Further optionally, in the direction from the object plane to the image plane, the air distance values ​​between a side of any preceding lens facing the image plane and a side of the subsequent adjacent lens of the preceding lens facing the object plane respectively satisfy corresponding preset distance conditions. Still further optionally, the corresponding air distance values ​​satisfying the corresponding preset distance conditions are specifically as follows:

[0095] The air distance between the first plano-convex lens 1011 facing the image plane and the double lens 1021 facing the object plane is d1=1±0.1 mm;

[0096] The air distance between the side of the double lens 1021 facing the image plane and the side of the meniscus lens 1031 facing the object plane is d2=1±0.1 mm;

[0097] The air distance between the side of the meniscus lens 1031 facing the image plane and the side of the biconcave lens 1041 facing the object plane is d3=11.5±0.3 mm;

[0098] The air distance between the side of the biconcave lens 1041 facing the image plane and the side of the second plano-convex lens facing the object plane is d4=51.1±0.5 mm.

[0099] Further optionally, the distance value from the side of the first plano-convex lens 1011 facing the object plane to the object plane is less than a preset front working distance threshold, the distance value from the side of the second plano-convex lens 1051 facing the image plane to the image plane is greater than or equal to a preset rear working distance threshold, and the distance value from the side of the second plano-convex lens 1051 facing the image plane to the image plane is a straight-line distance between the vertex of the side of the second plano-convex lens 1051 facing the image plane and the image plane. Still further optionally, the preset front working distance threshold is 70 mm, and the preset rear working distance threshold is 2500 mm.

[0100] Further optionally, the light output field angle of the projection illumination lens 10 is 36°.

[0101] It should be particularly noted that the first lens cell 101 , the second lens cell 102 , the third lens cell 103 , the fourth lens cell 104 and the fifth lens cell 105 can be scaled in equal proportions.

[0102] For example, it is assumed that the relevant parameters of the projection illumination lens 10 are shown in Table 1 below:

[0103] Table 1 Parameters of projection illumination lens 10

[0104] Face number n Surface type r d nd vd Semi-caliber 0(object plane) Spherical unlimited L y 1(aperture) Spherical unlimited 24.351 1.6204 60.37 61.7 2 Spherical -103.281 3.409 63.0 3 Spherical 109.274 20.316 1.6204 60.37 54.0 4 Spherical -847.814 1.000 54.0 5 Spherical 69.404 8.846 1.6727 32.18 43.3 6 Spherical 70.531 19.110 36.7 7 Spherical -87.045 3.240 1.7552 27.55 38.1 8 Spherical 87.045 31.070 34.7 9 Spherical unlimited 18.301 1.6385 55.47 40.1 10 Spherical -69.472 Lx 43.3 11 (Image plane) Spherical unlimited 0.000 y'

[0105] The specific description of Table 1 is as follows:

[0106] The surface number n is specifically used to indicate the order of the optical surfaces from the object side;

[0107] r is the radius of curvature of the optical surface, in mm;

[0108] d is the air distance value (i.e., interval) between the corresponding optical surface and the optical surface next to it, in mm;

[0109] nd is the D-line refractive index of the corresponding lens, and vd is the Abbe number corresponding to the material of the corresponding lens based on the D-line;

[0110] Lw is the front working distance, which represents the distance between the object plane of the projection object and the first surface of the first plano-convex lens 1011;

[0111] Lx is the rear working distance, which represents the straight-line distance between the vertex of the second surface of the second plano-convex lens 1051 and the projection plane (ie, the image plane).

[0112] Among them, the surface numbered 0 is the object surface, the surface numbered 1 is the system aperture surface, the surface numbered 11 is the image surface, the aperture value of the surface numbered 1 is the object height y, and the aperture value of the surface numbered 11 is the image height y ’ .

[0113] Other parameters are as follows: system focal length f=134.566, system barrel length 129.643mm, principal plane position 60.314mm (measured relative to surface 1). When the object height y is the maximum value of 42.5mm, and the aperture type of the numerical aperture is the object cone angle and the object cone angle is 28°, the optical path layout diagram formed by the light passing through the projection object through each lens of the projection illumination lens 10 can be as follows: Figure 2 As shown, Figure 2 The present invention discloses a schematic diagram of the optical path layout of a projection illumination lens.

[0114] Based on the above parameters, Lw is adjusted so that the image of the projected object is clearly projected onto the screen with Lx equal to 2500mm. According to the Gaussian object-image formula, the maximum front working distance can be 80.523mm, y ’ The distance is 823mm, and the field of view of the light is 36°. At this time, the corresponding imaging quality effect can be as follows: Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of analysis results corresponding to field curvature and distortion and dispersion conditions at different object heights in an imaging quality analysis disclosed in an embodiment of the present invention. Figure 4 1 is a schematic diagram of the analysis results corresponding to the uniformity of the light spot and the geometric MTF of the full-field polychromatic light in an imaging quality analysis disclosed in an embodiment of the present invention. Specifically, Figure 3 3-A in the figure is a schematic diagram of the field curvature and distortion results. Figure 3 3-B in the figure is a schematic diagram of the diffusion situation at different object heights. Figure 4 4-A in the figure is a schematic diagram of the uniformity of the light spot at different object heights. Figure 4 4-B in the figure is a schematic diagram showing the change of geometric MTF of full-field polychromatic light. Figure 3 and Figure 4 The imaging quality analysis results show that: the maximum distortion produced by the lighting equipment is less than 5%, the maximum diffuse spot RMS radius is less than 4mm (in the field of photographic imaging, generally only objects with holes are projected, and the diffuse spot RMS radius is qualified), the spot uniformity is greater than or equal to 80%, and when the spatial frequency is 0.1mm, most MTFs are greater than 0.6.

[0115] Based on the above parameters, Lw is adjusted so that the image of the projected object is clearly projected onto the screen with Lx equal to 5000mm. At this time, the front working distance value Lw is 77.01mm, y ’ is 1633.741mm, and the light field angle is 36°. At this time, the corresponding imaging quality effect can be as follows Figure 5 and Figure 6 As shown, Figure 5 is a schematic diagram of analysis results corresponding to field curvature and distortion and dispersion conditions at different object heights in another imaging quality analysis disclosed in an embodiment of the present invention, and Figure 6 1 is a schematic diagram of the analysis results corresponding to the uniformity of the light spot and the geometric MTF of the full-field polychromatic light in another imaging quality analysis disclosed in an embodiment of the present invention. Specifically, Figure 5 Figure 5-A is a schematic diagram of the field curvature and distortion results. Figure 5 Figure 5-B is a schematic diagram of the diffusion conditions at different object heights. Figure 6 Figure 6-A is a schematic diagram of the uniformity of the light spot at different object heights. Figure 6 6-B in Figure 6 is a schematic diagram showing the change of geometric MTF of full-field polychromatic light. Figure 5 and Figure 6 It can be seen that the maximum distortion produced by the lighting equipment is less than 5%, the maximum diffuse spot RMS radius is less than 6.5mm, the spot uniformity is greater than or equal to 80%, and when the spatial frequency is 0.1mm, most of the MTFs are greater than 0.8.

[0116] Based on the above parameters, Lw is adjusted so that the image of the projected object is clearly projected onto the screen with Lx of 25000mm, Lw is 74.182mm, and the image height y'=8139.820mm. In addition, the maximum distortion of the lighting equipment in the whole field of view is less than 3%, the maximum diffuse spot RMS radius in the whole field of view is less than 3.2mm, the uniformity of the system spot is greater than 85%, and when the spatial frequency is 0.01mm, the MTF of most fields of view is greater than 0.5.

[0117] Based on the above imaging quality analysis results, it can be known that the projection lighting lens 10 described in the embodiment of the present invention can ensure that the lighting equipment used by the projection lighting lens 10 can achieve a light output field angle of 36° through the above structural design, lens shape design, lens material design, lens thickness design and air spacing requirement design between lenses, and the maximum diameter of the projection object can reach 85mm, and the distance value from the second plano-convex lens 1051 to the image plane can achieve clear projection images, high brightness and high uniformity from 2500mm to infinity. In addition, the projection lighting lens 10 has a high projection imaging capability for high-power LED integrated light sources with relatively large light-emitting areas, improves the light projection efficiency of high-power LED integrated light sources with larger light-emitting surfaces, and has a certain resolution capability, which brings great convenience to the shooting scene.

[0118] Embodiment 2

[0119] The embodiment of the present invention discloses a lighting device, which includes a lighting device body and a projection lighting lens arranged on the lighting device body, and the projection lighting lens is the projection lighting lens described in Embodiment 1. Optionally, the lighting device can be a stage lighting device or a photographic device, which is not limited in the embodiment of the present invention.

[0120] The device embodiments described above are only illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, i.e., they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0121] Through the specific description of the above embodiments, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the above technical solution can be essentially or partly contributed to the prior art in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable rewritable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0122] Finally, it should be noted that the projection illumination lens and the illumination device disclosed in the embodiments of the present invention are only preferred embodiments of the present invention, and are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments.

Claims

1. A projection lighting lens, characterized in that: The projection illumination lens (10) comprises: A first lens element (101), wherein the first lens element (101) is a positive lens, and the first lens element (101) comprises a first plano-convex lens (1011); A second lens element (102), wherein the second lens element (102) is a positive lens, and the second lens element (102) includes a double lens (1021); A third lens element (103), wherein the third lens element (103) is a positive lens, and the third lens element (103) comprises a meniscus lens (1031); A fourth lens element (104), wherein the fourth lens element (104) is a negative lens, and the fourth lens element (104) comprises a biconcave lens (1041); A fifth lens element (105), wherein the fifth lens element (105) is a positive lens, and the fifth lens element (105) comprises a second plano-convex lens (1051); Wherein, the first lens element (101), the second lens element (102), the third lens element (103), the fourth lens element (104) and the fifth lens element (105) are arranged in sequence from the object plane to the image plane along the light propagation direction, and the projection illumination lens (10) is used to project the light of the projection object at the object plane onto the image plane after passing through the first lens element (101), the second lens element (102), the third lens element (103), the fourth lens element (104) and the fifth lens element (105) in sequence; the distance value from the side of the first plano-convex lens (1011) facing the object plane to the object plane is less than a preset front working distance threshold; the distance value from the side of the second plano-convex lens (1051) facing the image plane to the image plane is greater than or equal to a preset rear working distance threshold; Wherein, the light output field angle of the projection illumination lens (10) is 36°.

2. The projection illumination lens according to claim 1, characterized in that: The side of the first plano-convex lens (1011) facing the object plane is a plane, and the side of the first plano-convex lens (1011) facing the image plane is a convex surface with a negative radius; The side of the double lens (1021) facing the object plane is a convex surface with a positive radius, and the side of the double lens (1021) facing the image plane is a convex surface with a negative radius; The side of the meniscus lens (1031) facing the object plane is a convex surface and its radius is a positive value, and the side of the meniscus lens (1031) facing the image plane is a concave surface and its radius is a positive value; The side of the biconcave lens (1041) facing the object plane is a concave surface with a negative radius, and the side of the biconcave lens (1041) facing the image plane is a concave surface with a positive radius; The side of the second plano-convex lens (1051) facing the object plane is a plane, and the side of the second plano-convex lens (1051) facing the image plane is a convex surface with a negative radius.

3. The projection illumination lens according to claim 2, characterized in that: The height of the projection object is less than or equal to 42.5 mm; The system focal length of the projection illumination lens (10) is equal to 134.566 mm; When the aperture type of the numerical aperture of the projection illumination lens (10) is an object-space cone angle, the half angle of the object-space cone angle is less than or equal to 14°.

4. The projection illumination lens according to claim 2 or 3, characterized in that: The optical power fa1 of the first plano-convex lens (1011) is positive; The optical power fa2 of the double lens (1021) is positive; The optical power fa3 of the meniscus lens (1031) is positive; The optical power fa4 of the biconcave lens (1041) is negative; The optical power fa5 of the second plano-convex lens (1051) is positive.

5. The projection illumination lens according to claim 4, characterized in that: The optical power fa1 of the first plano-convex lens (1011) is 0.006007±0.0005; The optical power fa2 of the double lens (1021) is 0.006357±0.0005; The focal power fa3 of the meniscus lens (1031) is 0.000644±0.0005; The optical power fa4 of the biconcave lens (1041) is -0.017491±0.002; The optical focal length fa5 of the second plano-convex lens (1051) is 0.009191±0.0005.

6. The projection illumination lens according to claim 4 or 5, characterized in that: The radius of the side of the meniscus lens (1031) facing the object plane is less than or equal to the radius of the side of the meniscus lens (1031) facing the image plane, and / or the ratio of the radius of the side of the meniscus lens (1031) facing the image plane to the radius of the side of the meniscus lens (1031) facing the object plane satisfies a first preset ratio condition; and / or, The ratio of the radius of the side of the biconcave lens (1041) facing the image plane to the radius of the side of the biconcave lens (1041) facing the object plane satisfies a second preset ratio condition; and / or, The radius of the side of the dual lens (1021) facing the image plane is greater than the absolute value of the radius of the side of the dual lens (1021) facing the object plane, and / or the ratio of the radius of the side of the dual lens (1021) facing the image plane to the radius of the side of the dual lens (1021) facing the object plane satisfies a third preset ratio condition.

7. The projection illumination lens according to claim 6, characterized in that: The refractive index nd1 of the first plano-convex lens (1011) is 1.6204±0.005, and the scattering coefficient vd1 thereof is 60.37±0.01; and / or, The refractive index nd2 of the double lens (1021) is 1.6204±0.005, and the scattering coefficient vd2 is 60.37±0.01; and / or, The refractive index nd3 of the meniscus lens (1031) is 1.6727±0.005, and the scattering coefficient vd3 thereof is 32.18±0.01; and / or, The refractive index nd4 of the biconcave lens (1041) is 1.7552±0.005, and the scattering coefficient vd4 thereof is 7.55±0.01; and / or, The refractive index nd5 of the second plano-convex lens (1051) is 1.6385±0.005, and the scattering coefficient vd5 is 55.47±0.

01.

8. The projection illumination lens according to claim 7, characterized in that: For any lens in the projection illumination lens (10), the lens edge thickness corresponding to the lens is within a preset thickness range, and the center thickness corresponding to the lens is greater than or equal to a preset thickness threshold; Among them, the preset thickness range is 3mm to 5mm, and the preset thickness threshold is 2mm.

9. The projection illumination lens according to claim 8, characterized in that: In the direction from the object plane to the image plane, the air distance values ​​between a side of any preceding lens facing the image plane and a side of a subsequent adjacent lens of the preceding lens facing the object plane respectively satisfy corresponding preset distance conditions; And, the distance value from the side of the second plano-convex lens (1051) facing the image plane to the image plane is the straight-line distance between the vertex of the side of the second plano-convex lens (1051) facing the image plane and the image plane; Among them, the preset front working distance threshold is 70mm, and the preset rear working distance threshold is 2500mm.

10. A lighting device, characterized in that: The lighting device comprises a lighting device body and a projection lighting lens arranged on the lighting device body, and the projection lighting lens is the projection lighting lens according to any one of claims 1 to 9.

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