CN116991027A - Optical device, point light source lamp and projection lens - Google Patents
Optical device, point light source lamp and projection lens Download PDFInfo
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- CN116991027A CN116991027A CN202311101209.2A CN202311101209A CN116991027A CN 116991027 A CN116991027 A CN 116991027A CN 202311101209 A CN202311101209 A CN 202311101209A CN 116991027 A CN116991027 A CN 116991027A
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/206—Control of light source other than position or intensity
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
Abstract
The invention discloses an optical device, a point light source lamp and a projection lens, wherein the optical device comprises: the condensing lens group is used for condensing light rays emitted by the light emitting surface of the spot light source lamp to form emergent light rays; the light-reflecting light-mixing cover is used for diffusely reflecting the emergent light rays of the condensing lens group to the projection object to be projected; the light rays diffusely reflected to the projection object are projected to the projection surface through the projection lens after passing through the aperture on the projection object, so as to form a projection image of the projection object. Therefore, the invention can design the optical device applied to the point light source lamp, is beneficial to improving the light utilization rate and the use safety, is simultaneously applicable to monochromatic light sources and polychromatic light sources, has strong compatibility, can realize uniform light mixing under the condition of polychromatic light sources, and improves the light mixing effect.
Description
Technical Field
The present invention relates to the field of optical projection technology, and in particular, to an optical device, a point light source lamp, and a projection lens.
Background
In the field of photography, stage and the like with projection lighting requirements, a projection lamp is often used, and the main principle of the projection lamp is that a light condensing system is used for condensing and irradiating light emitted by a lamp integrating a point light source (short for a point light source lamp) on a projection object, the projection object is projected onto a screen by using a projection lens, the clear shape of the projection object appears on the screen, a blank of the projection object is filled with light, when the projection object does not exist, the projection lens performs projection imaging on an aperture diaphragm on an object focal plane, an image of the aperture diaphragm appears on the screen, the middle of the image of the aperture diaphragm is filled with light to form a light spot, the uniformity of the light spot is high, the edge of the light spot is clear, the distortion is small, hard light in photography light filling illumination is formed, the projection beam has strong Tyr effect, and the projection distance is far.
In the prior art, in order to increase the brightness of the point light source lamp, the power of the LED is often increased to increase the lumen value of the lamp, so that the usage amount of the LED chip is increased, and the light emitting surface of the point light source lamp is also increased. In addition, with the development of photography and lighting industry, point light source lamps are no longer of a single color, and currently, double-color temperature types are presented, namely: the dual color temperature and the multiple color LED chips require a certain power ratio for each color LED chip in order to obtain constant illuminance. In summary, the light emitting surface of the point light source lamp has a larger line diameter, the light emitting model of the point light source lamp composed of the multicolor light source is close to lambertian, the light emitting angle is large, and the light mixing system is required to mix light before the light collecting system is used, so that light can be collected after the mixed light is uniform.
Practice finds that for point light source lamps with larger luminous surface, if the point light source lamps are used as illumination light sources of projection lenses, 2 methods are generally adopted: firstly, the condensing system is made into a large caliber, huge in size and heavy in weight, and the formed condensing light spots are large. When the light irradiates the area where the projection object is, the light blocking treatment is usually needed, the light utilization rate is not improved, and the light spots in a certain area are intercepted through the light blocking treatment so as to adapt to a small-caliber projection lens, the intercepted light irradiates on a light blocking diaphragm and is converted into a large amount of heat, the temperature of a condensing system is increased, the condensing system is damaged to a certain extent, and the use safety is not improved; secondly, consider that the light source is polychrome light source, for even light mixing, generally need increase the diffusion piece that has certain haze in spotlight system's light inlet department in order to strengthen light mixing, not only can reduce printing opacity efficiency, but also can increase heat dissipation pressure, also can cause certain harm to spotlight system like this, be unfavorable for improving safety in utilization.
It is important to provide an optical device for point light source lamp to improve the light utilization rate and the safety.
Disclosure of Invention
The invention provides an optical device, a projection lens and a lighting device, which can improve the light utilization rate and the use safety.
To solve the above technical problem, a first aspect of the present invention discloses an optical device, including:
the condensing lens group is used for condensing light rays emitted by the light emitting surface of the spot light source lamp to form emergent light rays;
the light-reflecting light-mixing cover is used for diffusely reflecting the emergent light rays of the condensing lens group to a projection object to be projected;
the light rays which are diffusely reflected to the projection object pass through the aperture on the projection object and then are projected to the projection surface through the projection lens, so that a projection image of the projection object is formed.
As an alternative embodiment, in the first aspect of the present invention, the inner surface of the reflective light-mixing cover is coated with a diffuse reflection layer.
In a first aspect of the present invention, the lenses in the condensing lens group are convex lenses, the number of lenses in the condensing lens group is greater than or equal to 1, the light incident surface of each lens in the condensing lens group is a plane and the light emergent surface is a convex surface;
when the number of lenses in the condensing lens group is larger than 1, in the light transmission direction, for any lens, the lens is used for condensing the light incident on the lens to form the emergent light of the lens; if the lens is not the last lens, the emergent light of the lens is emergent to the adjacent lens behind the lens for condensation; if the lens is the last lens, the emergent light of the lens is taken as the emergent light of the condensing lens group to be emergent to the reflective light mixing cover.
As an optional implementation manner, in the first aspect of the present invention, the condensing lens group includes:
the first convex lens is used for condensing the light rays emitted by the light emitting surface of the point light source lamp to form first emergent light rays, and the emergent angle of the first emergent light rays is smaller than that of the light rays emitted by the light emitting surface of the point light source lamp;
the second convex lens is used for condensing the first emergent light to form second emergent light, and the emergent angle of the second emergent light is smaller than that of the first emergent light;
the third convex lens is used for condensing the second emergent light to form third emergent light, and the emergent angle of the third emergent light is smaller than that of the second emergent light.
In a first aspect of the present invention, the first convex lens is an aspheric condensing convex lens, and the second convex lens and the third convex lens are spherical condensing convex lenses or aspheric condensing convex lenses;
and/or the number of the groups of groups,
and the material of at least one lens in the condensing lens group is high boron silicon or H-ZK11.
As an alternative embodiment, in the first aspect of the present invention, the optical device further includes:
the projected article;
and/or the number of the groups of groups,
the light condensing lens group, the light reflecting and mixing cover and the projection object are all arranged in the shell.
In a first aspect of the present invention, a first connection portion is disposed on a side of the housing relatively close to the condensing lens group, and the first connection portion is configured to be coupled to the point light source lamp;
and/or the number of the groups of groups,
a second connecting part is arranged on one side, relatively close to the reflective light mixing cover, of the shell, and the second connecting part is used for being coupled and connected with the projection lens;
and/or the number of the groups of groups,
a heat dissipation structure is arranged on the outer side of the shell;
and/or the number of the groups of groups,
the light-gathering lens is characterized in that a mounting bracket is arranged in the shell and used for mounting the light-gathering lens group and/or the light-reflecting light-mixing cover and/or the projection object.
As an optional implementation manner, in the first aspect of the present invention, a caliber radius of the first convex lens is smaller than a caliber radius of the second convex lens and a caliber radius of the third convex lens;
and/or the number of the groups of groups,
the curvature radius corresponding to the convex surface of the first convex lens is smaller than the curvature radius corresponding to the convex surface of the second convex lens and the curvature radius corresponding to the convex surface of the third convex lens;
and/or the number of the groups of groups,
the center thickness of the first convex lens is larger than that of the second convex lens, and the center thickness of the third convex lens;
and/or the number of the groups of groups,
the first convex lens, the second convex lens and the third convex lens have the same refractive index and the same dispersion coefficient;
and/or the number of the groups of groups,
the interval distance between the plane of the first convex lens and the light emitting surface of the point light source lamp is smaller than the interval distance between the convex surface of the first convex lens and the plane of the second convex lens and the interval distance between the convex surface of the second convex lens and the plane of the third convex lens.
In an optional implementation manner, in a first aspect of the present invention, a distance between a first opening plane of the reflective light-mixing cover facing the third convex lens and a convex surface of the third convex lens is 5mm to 10mm; the diameter of the first opening plane is 135-150 mm;
the cone angle of the reflective light mixing cover is 30-35 degrees;
the diameter of the reflective light mixing cover facing the second opening plane of the projection object is 87 mm-90 mm, and the interval distance between the second opening plane and the projection object is 10 mm-30 mm;
the depth of the light reflecting light mixing cover is 40 mm-50 mm.
The second aspect of the present invention discloses a point light source lamp, including:
the lamp comprises a lamp body and an optical device, wherein the lamp body and the optical device are sequentially arranged along light transmission, and the optical device is coupled and connected with the lamp body; wherein the optical device comprises the optical device of any one of the first aspects of the invention.
A third aspect of the present invention discloses a projection lens, including:
the projection lens comprises a projection lens body and an optical device, wherein the optical device is coupled with the projection lens body; wherein the optical device comprises the optical device of any one of the first aspects of the invention.
Compared with the prior art, the invention has the following beneficial effects:
the optical device disclosed by the invention comprises: the condensing lens group is used for condensing light rays emitted by the light emitting surface of the spot light source lamp to form emergent light rays; the light-reflecting light-mixing cover is used for diffusely reflecting the emergent light rays of the condensing lens group to the projection object to be projected; the light rays diffusely reflected to the projection object are projected to the projection surface through the projection lens after passing through the aperture on the projection object, so as to form a projection image of the projection object. Therefore, the invention can design the optical device applied to the point light source lamp, is beneficial to improving the light utilization rate and the use safety, is simultaneously suitable for a monochromatic light source and a polychromatic light source, has strong compatibility, can realize uniform light mixing without additionally adding a diffusion sheet with certain haze when the polychromatic light source is used, not only improves the light mixing effect, but also reduces the cost and the weight of the optical device. In addition, the aperture of the projection lens is moderate, the light spot formed by projection of the projection lens has high brightness and high uniformity, the imaging quality of a projection line is high, and great convenience is brought to illumination projection (such as special illumination or light filling).
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an optical device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a reflective hybrid mask according to an embodiment of the present invention;
FIG. 3 is a schematic view of light incident and light emergent of a reflective light-mixing cover according to an embodiment of the present invention;
FIG. 4 is a schematic view of another optical device according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a system architecture of an optical device for implementing illumination projection by using a point light source lamp according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of parameter identification of a reflective hybrid mask according to an embodiment of the present invention;
FIG. 7 is a schematic view of an optical path of an optical device according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a light intensity distribution according to an embodiment of the present invention.
In the figure: 10. an optical device; 101. a condensing lens group; 1011. a first convex lens; 1012. a second convex lens; 1013. a third convex lens; 102. a reflective light mixing cover; 1021. a diffuse reflection layer; 103. projecting the object; 104. a housing; 1041. a first connection portion; 1042. a second connecting portion; 1043. a heat dissipation structure; 1044. a mounting bracket; 20. a point light source lamp; 201. a light emitting surface; 30. and a projection lens.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, apparatus, article, or device that comprises a list of steps or elements is not limited to the list of steps or elements but may, in the alternative, include other steps or elements not expressly listed or inherent to such process, method, article, or device.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The invention discloses an optical device, a point light source lamp and a projection lens, which can be used for improving the light utilization rate and the use safety of the point light source lamp, are suitable for a monochromatic light source and a polychromatic light source, have strong compatibility, can realize uniform light mixing without additionally adding a diffusion sheet with certain haze when in the polychromatic light source, not only improve the light mixing effect, but also reduce the cost and the weight of the optical device. In addition, the caliber of the projection lens is moderate, the light spot formed by projection of the projection lens is high in brightness and uniformity, the imaging quality of the projection image is high, great convenience is brought to illumination projection (such as special illumination or light filling) and the use experience of a user is improved. The following will describe in detail.
Example 1
Referring to fig. 1, fig. 1 is a schematic structural diagram of an optical device according to an embodiment of the invention. The optical device 10 described in fig. 1 may be applied to a point light source lamp 20 (i.e. a lamp integrating a point light source), and combines with a projection lens 30 to realize illumination projection, so as to facilitate special illumination or light supplement, and further, the point light source lamp 20 may be a high-power LED point light source lamp. The optical device 10 and its use in combination with the point source light fixture 20, projection lens 30 are described in detail below in conjunction with fig. 1-8.
As shown in fig. 1, the optical device 10 may include:
a condensing lens group 101, wherein the condensing lens group 101 is used for condensing the light emitted by the light emitting surface 201 of the spot light source lamp 20 to form light emitting light;
the light-reflecting light-mixing cover 102 is used for diffusely reflecting the emergent light rays of the condensing lens group 101 to the projection object 103 to be projected.
The light that is diffusely reflected to the projection object 103 passes through the aperture on the projection object 103 and then is projected to the projection plane through the projection lens 30, so as to form a projection image of the projection object 103.
In the embodiment of the present invention, when the optical device 10 is applied to the point light source lamp 20 and combines with the projection lens 30 to realize illumination projection, the light-emitting surface 201 of the point light source lamp 20 is followed by the condensing lens group 101, the reflective light-mixing cover 102, the projection object 103 and the projection lens 30 in order according to the light transmission direction. The projection object 103 may be a pattern sheet with a certain pattern, or may be a partially hollowed-out metal sheet, which is an object to be projected by the projection lens 30, and the thickness and the line diameter of the projection object need to meet the depth of field requirement and the object height requirement of the projection lens 30.
In the embodiment of the present invention, the condensing lens group 101 condenses light to reduce the light emitting angle of the light emitted from the light emitting surface 201 of the point light source lamp 20 to a certain angle range. Since the outgoing light rays formed after the condensing lens group 101 condenses are not emitted in parallel, or the outgoing light rays are not converged according to a certain angle, many light rays still have a divergence shape with a certain angle, and these non-parallel light rays, non-converged light rays, redundant parallel light rays and the like will irradiate on other components (such as the outer shell of the optical device 10 or other fixing components, etc.), these light rays are not fully utilized, which is unfavorable for improving the light utilization rate, and the heat dissipation pressure of the optical device 10 is also increased. In addition, when the light source in the point light source lamp 20 is a multicolor light source, the light diffusely reflected by the reflective light-mixing cover 102 has randomness, so that the reflective light-mixing cover 102 can also increase the uniformity of mixed light, thereby improving the light-mixing effect, and the haze diffusion sheet does not need to be additionally added at the front end of the optical device 10, which is beneficial to reducing the weight of the optical device 10.
Alternatively, the reflective light-mixing cover 102 may be made of metal by spinning, the inner surface of which is coated with the diffuse reflection layer 1021, and the structure of the reflective light-mixing cover 102 may be as shown in fig. 2, and fig. 2 is a schematic structural diagram of a reflective light-mixing cover according to an embodiment of the present invention. The diffuse reflection layer 1021 in fig. 2 is used to achieve the diffuse reflection effect of the reflective light-mixing cover 102, which is not only beneficial to improving the light utilization rate and the use safety of the optical device 10, but also beneficial to improving the light-mixing effect of the polychromatic light emitted by the polychromatic light source, and the reflective light-mixing effect of the reflective light-mixing cover 102 can be shown with reference to fig. 3, and fig. 3 is a schematic light diagram corresponding to the incident light and the outgoing light of the reflective light-mixing cover disclosed in the embodiment of the invention. As can be seen from fig. 3, the non-uniform light incident to the reflective light-mixing cover 102 is parallel light, and the reflective light-mixing cover 102 reflects the incident light and mixes the light to form light that irradiates the area where the projection object 103 is located.
In an alternative embodiment, the lenses in the condensing lens group 101 are convex lenses, the number of lenses in the condensing lens group 101 is greater than or equal to 1, the light incident surface of each lens in the condensing lens group 101 is a plane and the light emergent surface is a convex surface. What needs to be specifically stated is: the condensing lens group 101 is configured to reduce the light emitting angle of the light emitted by the light emitting surface 201 of the point light source lamp 20 to a certain angle range, and the number of lenses included in the condensing lens group 101 can be adaptively selected according to actual requirements.
Further, when the number of lenses in the condensing lens group 101 is greater than 1, the lens is used to condense the light incident on the lens to form the outgoing light of the lens for any lens in the light transmission direction. If the lens is the first lens in the light transmission direction, the light incident on the lens is the light emitted from the light emitting surface 201 of the point light source lamp 20; if the lens is not the first lens in the light transmission direction, the light incident on the lens is the outgoing light of the lens adjacent to the lens before the lens, which is closer to the light emitting surface 201 of the point light source lamp 20 than the lens.
Further, if the lens is not the last lens, the emergent light of the lens is emitted to the adjacent lens behind the lens for condensation; if the lens is the last lens, the outgoing light of the lens is emitted to the reflective light-mixing cover 102 as the outgoing light of the condensing lens group 101.
It can be seen that this alternative embodiment is capable of achieving condensing of the light emitted from the light emitting surface 201 of the spot light source lamp 20 by means of one or more convex lenses, which is advantageous for improving the condensing effect and the condensing flexibility.
In this alternative embodiment, as shown in fig. 1, further alternatively, the condensing lens group 101 may include:
the first convex lens 1011, the first convex lens 1011 is used for condensing the light emitted by the light emitting surface 201 of the point light source lamp 20 to form a first light emitting light, and the light emitting angle of the first light emitting light is smaller than the light emitting angle of the light emitted by the light emitting surface 201 of the point light source lamp 20;
the second convex lens 1012 is used for condensing the first emergent light to form second emergent light, and the emergent angle of the second emergent light is smaller than that of the first emergent light;
the third convex lens 1013, the third convex lens 1013 is configured to condense the second light-emitting light to form a third light-emitting light, where an light-emitting angle of the third light-emitting light is smaller than that of the second light-emitting light.
Among them, as can be seen from the effects of the foregoing convex lenses, the first convex lens 1011, the second convex lens 1012, and the third convex lens 1013 are arranged in order in the light transmission direction.
In this alternative embodiment, further optionally, the first convex lens 1011 is an aspheric condensing convex lens, which plays a role of first condensing, and is used for reducing the light emergent angle (i.e. the light emergent angle) of the light emitted by the light emitting surface 201 of the point light source lamp 20 to a certain range, and reducing the probability of occurrence of total reflection as much as possible. Still further alternatively, the lens material of the first convex lens 1011 may be a material resistant to heat, thermal expansion and thermal shock, such as high boron silicon or H-ZK11.
In this alternative embodiment, further optionally, the second convex lens 1012 is a spherical condensing convex lens or an aspherical condensing convex lens, which plays a role of second condensing, and is used to further reduce the light emergent angle of the emergent light of the first convex lens 1011 to a certain range, and the probability of occurrence of total reflection needs to be reduced as much as possible. Still further alternatively, the second convex lens 1012 lens material may be a material with low thermal expansion and thermal shock resistance, such as high boron silicon or H-ZK11.
In this alternative embodiment, further optionally, the third convex lens 1013 is a spherical condensing convex lens or an aspherical condensing convex lens, which performs a third condensing function, and is used to further reduce the light exit angle of the light exit ray of the second convex lens 1012 to a certain range, so that the light spot of the light exit ray of the third convex lens 1013, which irradiates on the plane of the projection object 103 after passing through the reflective light mixing cover 102, approaches the caliber of the projection object 103, and the probability of total reflection needs to be reduced as much as possible. Still further alternatively, the lens material of the third convex lens 1013 may be a material which is resistant to temperature, small in thermal expansion, and resistant to thermal shock, such as high boron silicon or H-ZK11.
It can be seen that this alternative embodiment can further combine the light spot irradiated on the plane of the projection object 103 with the light-reflecting light-mixing cover 102 through the three light-condensing actions of the three convex lenses to approach the caliber of the projection object 103, which is beneficial to improving the light utilization rate, increasing the brightness of the illuminated area, and further improving the brightness of the projected projection image. In addition, the materials of the three convex lenses can be materials with low temperature resistance, low thermal expansion and thermal shock resistance, so that the light condensation performance of the convex lenses is improved, and the use safety of the convex lenses is improved.
In another alternative embodiment, as shown in fig. 4, the optical device 10 may further include:
the projection object 103, i.e. the projection object 103, is formed as a part of the optical device 10;
and/or the number of the groups of groups,
the housing 104, the condensing lens assembly 101, the reflective light-mixing cover 102 and the projection object 103 are disposed in the housing 104.
Alternatively, the housing 104 may be made of metal, which is advantageous for further improving heat dissipation.
It can be seen that this alternative embodiment can protect and fix the condensing lens set 101, the reflective light-mixing cover 102 and the projection object 103 by the housing 104, which is beneficial to further improving the use safety of the optical device 10.
In this alternative embodiment, as shown in fig. 4, a first connection portion 1041 is disposed on a side of the housing 104 relatively close to the condensing lens group 101, where the first connection portion 1041 is used for coupling connection with the point light source lamp 20;
and/or the number of the groups of groups,
a second connection portion 1042 is disposed on a side of the housing 104 relatively close to the light-reflecting light-mixing cover 102, and the second connection portion 1042 is used for coupling connection with the projection lens 30;
and/or the number of the groups of groups,
a heat dissipation structure 1043 is arranged outside the shell 104;
and/or the number of the groups of groups,
the casing 104 is provided with a mounting support 1044, and the mounting support 1044 is used for fixedly mounting or detachably mounting the condensing lens group 101 and/or the reflective light mixing cover 102 and/or the projection object 103, and optionally, the mounting support 1044 can release and compensate the elastic modulus of expansion caused by heat and contraction caused by cold of the internal part in a certain temperature range, and meanwhile has heat conducting performance, and has a contact area fully connected with the casing 104, namely: the mounting support 1044 is a support with thermal expansion and contraction compensation performance, and may be made of metal or a silica gel pad with high temperature resistance and high thermal conductivity. Thus, not only the installed components can be fixed, but also heat can be timely conducted and emitted through contact with the shell 104, so that the occurrence of failure of the corresponding components caused by overheating is reduced, and the performance of the optical device 10 is improved.
Alternatively, the first connecting portion 1041 and the second connecting portion 1042 may be a clamping structure, such as a bayonet. When the optical device 10 is coupled to the point light source 20 through the first connection portion 1041, the light emitting surface 201 of the point light source 20 needs to be as close to the plane of the first convex lens 1011 as possible, so that as many light rays emitted from the light emitting surface 201 of the point light source 20 are collected and converged by the first convex lens 1011 as possible. What needs to be specifically stated is: the light emitting surface 201 of the point light source lamp 20 needs to be as close to the plane of the first convex lens 1011 as possible, and meanwhile, enough assembly gap needs to be left between the two to reduce interference or assembly interference; and, when the optical device 10 is coupled to the projection lens 30 through the second connection portion 1042, it is necessary to ensure that the projection object 103 falls within the object focal plane and depth of field of the projection lens 30, so as to ensure that the projection and focusing can be performed.
The system architecture formed by the optical device 10, the point light source lamp 20 and the projection lens 30 in cooperation with each other can be shown in fig. 5, and fig. 5 is a schematic diagram of a system architecture of the optical device applied to the point light source lamp for realizing illumination projection according to an embodiment of the present invention. The working principle is as follows:
in normal operation, the LED point light sources in the point light source lamp 20 emit light, and after the light is emitted through the light emitting surface 201, the light is collected and illuminated on the projection object 103 after passing through the first convex lens 1011, the second convex lens 1012, the third convex lens 1013 and the reflective light mixing cover 102 in sequence, and then the light transmitted through the projection object 103 is projected onto the projection screen through the projection lens 30. The light passes through the hollowed-out portion of the projection object 103 and then projects on the projection screen as a bright portion, and the non-hollowed-out portion of the projection object 103 shields the light, and the corresponding projection portion on the projection screen is a dark line portion.
It can be seen that the coupling connection between the optical device 10 and the point light source lamp 20 can be realized by the first connecting portion 1041, and the coupling connection between the optical device and the projection lens 30 can be realized by the second connecting portion 1042, which is beneficial to improving the application convenience of the optical device 10 and the coupling connection efficiency. In addition, the heat dissipation structure 1043 disposed outside the housing 104 can further improve the heat dissipation performance of the optical device 10, thereby further improving the use safety of the optical device 10. In addition, the mounting bracket 1044 not only can fix the installed components, but also can timely conduct and emit heat through contact with the housing 104, so as to reduce failure of the corresponding components caused by overheating, and further facilitate improvement of performance of the optical device 10.
In yet another alternative embodiment, the caliber radius of the first convex lens 1011 is smaller than the caliber radius of the second convex lens 1012 and the caliber radius of the third convex lens 1013;
and/or the number of the groups of groups,
the radius of curvature corresponding to the convex surface of the first convex lens 1011 is smaller than the radius of curvature corresponding to the convex surface of the second convex lens 1012 and the radius of curvature corresponding to the convex surface of the third convex lens 1013;
and/or the number of the groups of groups,
the center thickness of the first convex lens 1011 is greater than the center thickness of the second convex lens 1012 and the center thickness of the third convex lens 1013;
and/or the number of the groups of groups,
the refractive index of the first convex lens 1011, the second convex lens 1012, and the third convex lens 1013 are the same and the dispersion coefficient is the same;
and/or the number of the groups of groups,
the separation distance between the plane of the first convex lens 1011 and the light emitting surface 201 of the point light source lamp 20 is smaller than the separation distance between the convex surface of the first convex lens 1011 and the plane of the second convex lens 1012 and the separation distance between the convex surface of the second convex lens 1012 and the plane of the third convex lens 1013.
Further, the materials and shapes of the second convex lens 1012 and the third convex lens 1013 can be identical, which reduces the mold opening cost of the optical device 10 and is beneficial to improving the mold opening efficiency.
For example, the system parameters of the optical device 10 may be as shown in table 1 below:
table 1 system parameter table of optical device 10
The radius R1 in table 1 is a plane radius of the corresponding convex lens, and the radius R2 is a curvature radius corresponding to the convex surface of the corresponding convex lens.
And, the structural parameter marks required by the reflective hybrid mask 102 are shown in fig. 6, wherein the spacing distance d1 between the first opening plane facing the third convex lens 1013 and the convex surface of the third convex lens 1013 is 5 mm-10 mm; the diameter w1 of the first opening plane is 135-150 mm; the cone angle alpha of the reflective light mixing cover 102 is 30-35 degrees; the diameter w2 of the reflective light mixing cover 102 facing the second opening plane of the projection object 103 is 87 mm-90 mm, and the spacing distance d2 between the second opening plane and the projection object 103 is 10 mm-30 mm; the depth h of the reflective light mixing cover 102 is 40 mm-50 mm. Wherein, the reflection model of the diffuse reflection layer of the reflective light mixing cover 102 is a lambertian model, and the reflectivity is more than 90%.
Based on the system parameters of the optical device 10 and the structural parameters of the reflective light-mixing cover 102, the optical path of the optical device 10 can be shown in fig. 7, and fig. 7 is a schematic diagram of the optical path of an optical device according to an embodiment of the invention. In addition, the light intensity distribution of the light spot and the light spot formed after the light beam is focused on the projection object 103 may be shown in fig. 8, where a in fig. 8 is used to represent the light spot formed after the light beam is focused on the projection object 103, and b in fig. 8 is used to represent the light intensity distribution of the light spot formed after the light beam is focused on the projection object 103.
As can be seen in connection with fig. 7 and 8: the light emitted by the light emitting surface 201 is concentrated and illuminated on the projection object 103 after passing through the first convex lens 1011, the second convex lens 1012, the third convex lens 1013 and the reflective light mixing cover 102, and the light spots on the projection object 103 are high in brightness and are concentrated at the aperture of the projection object 103, so that the light utilization rate is improved, and in addition, the brightness and the definition of the projection image can be improved.
It can be seen that the optical device 10 described in the embodiment of the invention is beneficial to improving the light utilization rate and the use safety, is suitable for a single-color or multi-color point light source lamp 20 with a light emitting surface 201 with a diameter less than or equal to 81mm, and the smaller the light emitting surface 201 is, the higher the corresponding light utilization rate is, and is suitable for a projection lens 30 for focusing or zooming a projection object 103 with an object height less than or equal to 42.5mm, and has strong compatibility.
In addition, for the single-color or multi-color point light source lamp 20 with the diameter of the light emitting surface 201 less than or equal to 81mm, on the premise of sufficient heat dissipation measures and performance, the electric power of the point light source lamp 20 can reach 5000W at maximum, the light radiation power can reach 2800W at maximum, and the light utilization rate is high.
In addition, even light mixing can be realized without additionally adding a diffusion sheet with certain haze when a multicolor light source is used, so that the light mixing effect is improved, and the cost and the weight of the optical device can be reduced. In addition, the aperture of the projection lens is moderate, the light spot formed by projection of the projection lens is high in brightness and uniformity, the imaging quality of a projection line is high, great convenience is brought to illumination projection (such as special illumination or light filling) and the use experience of a user is improved.
Example two
The embodiment of the invention discloses a point light source lamp, which can comprise:
the lamp body and the optical device are sequentially arranged along the light transmission direction and are coupled and connected with the lamp body; wherein, the lamp body is integrated with a monochromatic light source or a polychromatic light source, the lamp body is provided with a luminous surface, the optical device comprises any one of the optical devices described in the first embodiment, and further, the point light source lamp can also comprise a projection lens. In the embodiment of the present invention, please refer to the first embodiment for the description of the optical device and the projection lens, and the description of the embodiment of the present invention is not repeated.
Example III
The embodiment of the invention discloses a projection lens, which can comprise:
the projection lens body and the optical device are coupled and connected with the projection lens body; the optical device may comprise any of the optical devices described in embodiment one. In the embodiment of the present invention, please refer to the first embodiment for the description of the optical device and the projection lens, and the description of the embodiment of the present invention is not repeated.
The apparatus embodiments described above are merely illustrative, wherein the modules illustrated as separate components may or may not be physically separate, and the components shown as modules may or may not be physical, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above detailed description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course by means of hardware. Based on such understanding, the foregoing technical solutions may be embodied essentially or in part in the form of a software product that may be stored in a computer-readable storage medium including Read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), programmable Read-Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), one-time programmable Read-Only Memory (OTPROM), electrically erasable programmable Read-Only Memory (EEPROM), compact disc Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM) or other optical disc Memory, magnetic disc Memory, tape Memory, or any other medium that can be used for computer-readable carrying or storing data.
Finally, it should be noted that: the disclosure of the optical device, the point light source lamp and the projection lens in the embodiment of the invention is only a preferred embodiment of the invention, and is only used for illustrating the technical scheme of the invention, but not limiting the technical scheme; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme recorded in the various embodiments can be modified or part of technical features in the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (11)
1. An optical device, characterized in that the optical device (10) comprises:
the condensing lens group (101), the condensing lens group (101) is used for condensing the light emitted by the luminous surface of the spot light source lamp (20) to form the emergent light;
the light-reflecting light-mixing cover (102) is used for diffusely reflecting the emergent light rays of the condensing lens group (101) to a projection object (103) to be projected;
the light rays which are diffusely reflected to the projection object (103) pass through the aperture on the projection object (103) and then are projected to a projection surface through the projection lens (30) so as to form a projection image of the projection object (103).
2. The optical device according to claim 1, characterized in that the inner surface of the light-reflecting light-mixing cover (102) is coated with a diffuse reflecting layer (1021).
3. The optical device according to claim 1 or 2, wherein the lenses in the condenser lens group (101) are convex lenses, the number of lenses in the condenser lens group (101) is 1 or more, the light entrance surface of each lens in the condenser lens group (101) is a plane and the light exit surface is a convex surface;
when the number of lenses in the condensing lens group (101) is greater than 1, in the light transmission direction, for any lens, the lens is used for condensing the light incident on the lens to form the emergent light of the lens; if the lens is not the last lens, the emergent light of the lens is emergent to the adjacent lens behind the lens for condensation; if the lens is the last lens, the emergent ray of the lens is taken as the emergent ray of the condensing lens group (101) to be emergent to the reflective light mixing cover (102).
4. An optical device according to claim 3, characterized in that the condenser lens group (101) comprises:
the first convex lens (1011) is used for condensing the light emitted by the light emitting surface of the point light source lamp (20) to form first emergent light, and the emergent angle of the first emergent light is smaller than that of the light emitted by the light emitting surface of the point light source lamp (20);
a second convex lens (1012), wherein the second convex lens (1012) is used for condensing the first emergent light to form a second emergent light, and the emergent angle of the second emergent light is smaller than that of the first emergent light;
and the third convex lens (1013), the third convex lens (1013) is used for condensing the second emergent light to form a third emergent light, and the emergent angle of the third emergent light is smaller than that of the second emergent light.
5. The optical device according to claim 4, wherein the first convex lens (1011) is an aspherical condensing convex lens, and the second convex lens (1012) and the third convex lens (1013) are spherical condensing convex lenses or aspherical condensing convex lenses;
and/or the number of the groups of groups,
the material of at least one lens in the condensing lens group (101) is high boron silicon or H-ZK11.
6. The optical device according to claim 5, wherein the optical device (10) further comprises:
-said projection object (103);
and/or the number of the groups of groups,
the light-gathering lens group (101), the light-reflecting light-mixing cover (102) and the projection object (103) are all arranged in the shell (104).
7. The optical device according to claim 6, wherein a first connection portion (1041) is provided on a side of the housing (104) relatively close to the condenser lens group (101), and the first connection portion (1041) is configured to be coupled to the point light source lamp (20);
and/or the number of the groups of groups,
a second connecting part (1042) is arranged on one side, relatively close to the light reflecting and light mixing cover (102), of the shell (104), and the second connecting part (1042) is used for being coupled and connected with the projection lens (30);
and/or the number of the groups of groups,
a heat dissipation structure (1043) is arranged on the outer side of the shell (104);
and/or the number of the groups of groups,
a mounting bracket (1044) is arranged in the shell (104), and the mounting bracket (1044) is used for mounting the condensing lens group (101) and/or the reflective light mixing cover (102) and/or the projection object (103).
8. The optical device according to claim 7, wherein the diameter radius of the first convex lens (1011) is smaller than the diameter radius of the second convex lens (1012) and the diameter radius of the third convex lens (1013);
and/or the number of the groups of groups,
the radius of curvature corresponding to the convex surface of the first convex lens (1011) is smaller than the radius of curvature corresponding to the convex surface of the second convex lens (1012) and the radius of curvature corresponding to the convex surface of the third convex lens (1013);
and/or the number of the groups of groups,
the center thickness of the first convex lens (1011) is greater than the center thickness of the second convex lens (1012) and the center thickness of the third convex lens (1013);
and/or the number of the groups of groups,
the refractive index of the first convex lens (1011), the second convex lens (1012) and the third convex lens (1013) are the same and the dispersion coefficient is the same;
and/or the number of the groups of groups,
the distance between the plane of the first convex lens (1011) and the light emitting surface of the point light source lamp (20) is smaller than the distance between the convex surface of the first convex lens (1011) and the plane of the second convex lens (1012) and the distance between the convex surface of the second convex lens (1012) and the plane of the third convex lens (1013).
9. The optical device according to claim 8, wherein a distance between a first opening plane of the light-reflecting light-mixing cover (102) facing the third convex lens (1013) and a convex surface of the third convex lens (1013) is 5mm to 10mm; the diameter of the first opening plane is 135-150 mm;
the cone angle of the reflective light mixing cover (102) is 30-35 degrees;
the diameter of the reflective light mixing cover (102) facing the second opening plane of the projection object (103) is 87-90 mm, and the interval distance between the second opening plane and the projection object (103) is 10-30 mm;
the depth of the light reflecting light mixing cover (102) is 40 mm-50 mm.
10. A point source light fixture, the point source light fixture comprising:
the lamp comprises a lamp body and an optical device, wherein the lamp body and the optical device are sequentially arranged along the light transmission direction, and the optical device is coupled and connected with the lamp body; wherein the optical device comprises an optical device according to any one of claims 1 to 9.
11. A projection lens, the projection lens comprising:
the projection lens comprises a projection lens body and an optical device, wherein the optical device is coupled with the projection lens body; wherein the optical device comprises an optical device according to any one of claims 1 to 9.
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| CN117192739A (en) * | 2023-11-08 | 2023-12-08 | 深圳爱图仕创新科技股份有限公司 | Variable focus lens and lighting device |
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