CN221056813U - Projection device and optical lens thereof - Google Patents

Abstract

The application relates to a projection device and an optical lens thereof, comprising a collimating lens group and a projection lens group; the collimating lens group comprises a first collimating lens with positive focal power, a second collimating lens with positive focal power, a third collimating lens with negative focal power and a fourth collimating lens with positive focal power which are sequentially arranged, and the collimating lens group is used for converting light rays of the light source into parallel light in a matching way; the projection lens group comprises a first projection lens, a second projection lens, a third projection lens, a fourth projection lens, a fifth projection lens and a sixth projection lens which are sequentially arranged and are used for amplifying and projecting parallel light of the collimation lens group in a matching way. On one hand, the structure is simple, the relative position is easy to adjust, and the appearance of the whole optical system is reduced; on the other hand, under the premise of ensuring the collimation effect, the four collimation lenses are matched with the six projection lenses, so that the projection performance such as projection angle, projection brightness, definition, distortion and the like can be ensured to avoid distortion, and the pattern effect can be better presented in a projection mode.

Description

Projection device and optical lens thereof

Technical Field

The present application relates to the field of lens pattern projection, and in particular, to a projection apparatus and an optical lens thereof.

Background

The pattern projection device is widely applied to various scenes, a light source such as an LED light source is used for irradiating a projection Film with patterns in a collimation mode, the projection Film is also called Film (Film), then the patterns on the projection Film are projected onto a target through projection optics to form clear patterns, the effects of advertisement display, special illumination spots and the like are achieved, and the attention of specific objects can be improved or other functions can be achieved.

Chinese patent publication No. CN212322049U discloses a lens and a projection lamp, the lens including a collimator lens group and a light distribution lens group sequentially arranged along an optical axis; the collimating lens group is provided with positive focal power and comprises a first collimating lens and a second collimating lens arranged between the first collimating lens and the light distribution lens group, and is used for collimating and converging divergent light emitted by the light source to the light distribution lens group; the light distribution lens group is provided with positive focal power and is used for projecting light to one side of the light distribution lens group back alignment straight lens group according to a preset light emergent angle, and the light distribution lens group can translate along an optical axis to control the light emergent angle of the lens.

However, this technique is excessively low in cost, and therefore, the projection performance such as the projection angle, the projection brightness, the sharpness, and the distortion is sacrificed, and the pattern effect is not exhibited well.

The Chinese patent with the publication number of CN212433474U discloses a Logo projection lamp lens, which comprises a lens barrel, a lens group, a space ring and a pressing ring, wherein the lens group, the space ring and the pressing ring are arranged in the lens barrel, the space ring is arranged between lenses included by the lens group and used for separating two adjacent lenses, the pressing ring is used for fixing the lens group, and the combined focal length F of the lens group is 24.2mm.

However, the structure of this technical design is relatively complex, resulting in a relatively large profile.

Disclosure of utility model

Based on this, it is necessary to provide a projection apparatus and an optical lens thereof.

In one embodiment, a projection device optical lens includes a collimating lens group and a projection lens group;

The collimating lens group comprises a first collimating lens with positive focal power, a second collimating lens with positive focal power, a third collimating lens with negative focal power and a fourth collimating lens with positive focal power which are sequentially arranged, and the first collimating lens, the second collimating lens, the third collimating lens and the fourth collimating lens are used for being matched to convert incident light rays of a light source into parallel light;

The projection lens group comprises a first projection lens, a second projection lens, a third projection lens, a fourth projection lens, a fifth projection lens and a sixth projection lens which are sequentially arranged, wherein the first projection lens, the second projection lens, the third projection lens, the fourth projection lens, the fifth projection lens and the sixth projection lens are used for being matched with amplifying, projecting and imaging the parallel light from the collimating lens group;

The fourth collimating lens is adjacent to the first projection lens, and a gap is reserved between the fourth collimating lens and the first projection lens and is used for placing a projection film;

And a gap is reserved between the fourth projection lens and the fifth projection lens and is used for placing a diaphragm.

The optical lens of the projection equipment is only provided with two lens groups, so that on one hand, the structure is simple, the relative position is easy to adjust, and the appearance of the whole optical system is reduced; on the other hand, under the premise of ensuring the collimation effect, the four collimation lenses are matched with the six projection lenses, so that the projection performance such as projection angle, projection brightness, definition, distortion and the like can be ensured to avoid distortion, and the pattern effect can be better presented in a projection mode.

In one embodiment, the first collimating lens is a plano-convex lens or a positive meniscus lens, the second collimating lens is a biconvex lens, the third collimating lens is a negative meniscus lens, and the fourth collimating lens is a biconvex lens or a plano-convex lens.

In one embodiment, the first collimating lens, the second collimating lens, the third collimating lens and the fourth collimating lens are arranged with adjustable distance therebetween.

In one embodiment, the first projection lens has positive power, the second projection lens has positive power, the third projection lens and the fourth projection lens have positive power as a whole, the fifth projection lens has negative power, and the sixth projection lens has positive power.

In one embodiment, the first projection lens is a biconvex lens, the second projection lens is a positive meniscus lens, the third projection lens and the fourth projection lens are a cemented lens combination, the fifth projection lens is a negative meniscus lens, and the sixth projection lens is a positive meniscus lens.

In one embodiment, the first projection lens, the second projection lens, the third projection lens and the fourth projection lens are arranged with adjustable distance therebetween; and/or the number of the groups of groups,

The distance between the fifth projection lens and the sixth projection lens can be adjusted.

In one embodiment, the second projection lens is disposed opposite the sixth projection lens; or alternatively

Imaging of the cemented lens combination passes through the diaphragm aperture of the diaphragm.

In one embodiment, the projection device optical lens further comprises the diaphragm.

In one embodiment, the optical lens of the projection device further includes a first bracket and a second bracket;

The first collimating lens, the second collimating lens, the third collimating lens and the fourth collimating lens are arranged on the first bracket, and the relative positions of the collimating lens group and the light source are integrally adjusted through the first bracket;

The first projection lens, the second projection lens, the third projection lens, the fourth projection lens, the diaphragm, the fifth projection lens and the sixth projection lens are all arranged on the second support, the relative positions of the first projection lens, the second projection lens, the third projection lens and the fourth projection lens and the collimating lens group are integrally adjusted through the second support, the relative positions of the diaphragm and the light source are adjusted through the second support, and the relative positions of the fifth projection lens, the sixth projection lens and the diaphragm are integrally adjusted through the second support.

In one embodiment, the optical lens of the projection device further comprises the light source, and the light source is an LED light source.

In one embodiment, a projection device includes a body and any of the projection device optical lenses of the embodiments mounted on the body.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present application, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following descriptions are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural diagram of an optical lens of a projection device according to an embodiment of the application.

Fig. 2 is a schematic view of the collimating lens group of the embodiment shown in fig. 1.

FIG. 3 is a schematic view of the projection lens assembly of the embodiment of FIG. 1.

Fig. 4 is a schematic structural diagram of another embodiment of an optical lens of a projection device according to the present application.

FIG. 5 is a schematic view of the projection lens assembly of the embodiment of FIG. 4.

Fig. 6 is a schematic structural diagram of another embodiment of an optical lens of a projection device according to the present application.

Fig. 7 is a schematic structural diagram of another embodiment of an optical lens of a projection device according to the present application.

Fig. 8 is a schematic application diagram of the embodiment shown in fig. 7.

Reference numerals: the projection device optical lens 100, the light source 200, the collimating lens group 300, the projection lens group 400, the projection film 500, the projection position 600, the first collimating lens 310, the second collimating lens 320, the third collimating lens 330, the fourth collimating lens 340, the first projection lens 410, the second projection lens 420, the third projection lens 430, the fourth projection lens 440, the fifth projection lens 450, the sixth projection lens 460, and the stop 470.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and the like are used in the description of the present application for the purpose of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" on a second feature may be that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through intermedial media. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

Unless defined otherwise, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in the description of the present application includes any and all combinations of one or more of the associated listed items.

The application discloses a projection device and an optical lens thereof, which comprise part of technical features or all technical features of the following embodiments; that is, the projection apparatus and the optical lens thereof include a part of or all of the following structures. In one embodiment of the application, an optical lens of a projection device comprises a collimating lens group and a projection lens group; the collimating lens group comprises a first collimating lens with positive focal power, a second collimating lens with positive focal power, a third collimating lens with negative focal power and a fourth collimating lens with positive focal power which are sequentially arranged, and the first collimating lens, the second collimating lens, the third collimating lens and the fourth collimating lens are used for being matched to convert light rays of a light source into parallel light; the projection lens group comprises a first projection lens, a second projection lens, a third projection lens, a fourth projection lens, a fifth projection lens and a sixth projection lens which are sequentially arranged, wherein the first projection lens, the second projection lens, the third projection lens, the fourth projection lens, the fifth projection lens and the sixth projection lens are used for being matched with amplifying and projecting parallel light of the collimating lens group; the fourth collimating lens is adjacent to the first projection lens, and a gap is reserved between the fourth collimating lens and the first projection lens and is used for placing a projection film; and a gap is reserved between the fourth projection lens and the fifth projection lens and is used for placing a diaphragm. The optical lens of the projection equipment is only provided with two lens groups, so that on one hand, the structure is simple, the relative position is easy to adjust, and the appearance of the whole optical system is reduced; on the other hand, under the premise of ensuring the collimation effect, the four collimation lenses are matched with the six projection lenses, so that the projection performance such as projection angle, projection brightness, definition, distortion and the like can be ensured to avoid distortion, and the pattern effect can be better presented in a projection mode.

The projection device and the optical lens thereof will be described in detail with reference to fig. 1 to 8.

In one embodiment, as shown in fig. 1, a projection device optical lens 100 includes a collimating lens group 300 and a projection lens group 400; the collimating lens group 300 is used for converting incident light into parallel light; the projection lens group 400 is used for magnifying the parallel light for projection imaging.

Referring to fig. 2 and 6, the collimating lens group 300 includes a first collimating lens 310 with positive power, a second collimating lens 320 with positive power, a third collimating lens 330 with negative power, and a fourth collimating lens 340 with positive power, which are sequentially disposed, and the first collimating lens 310, the second collimating lens 320, the third collimating lens 330, and the fourth collimating lens 340 are used to cooperatively convert incident light of the light source 200 into parallel light.

In one embodiment, the first collimating lens 310 is a plano-convex lens or a positive meniscus lens, the second collimating lens 320 is a biconvex lens, the third collimating lens 330 is a negative meniscus lens, and the fourth collimating lens 340 is a biconvex lens or a plano-convex lens.

Specifically, in this embodiment, the plano-convex lens is a lens with a positive focal length, one side of the plano-convex lens is a plane mirror, and the other side of the plano-convex lens is a spherical mirror, and the plano-convex lens is used for collecting parallel light rays to a point or refracting a point light source into a collimated light beam, and in this embodiment, the first collimating lens 310 is used for converting the point light source into parallel light, but such parallel light rays are not parallel enough and need to be adjusted in cooperation with other collimating lenses.

In other embodiments, the first collimating lens 310 may also use a positive meniscus lens instead of a plano-convex lens, the meniscus lens may be used as a condenser of the illumination system, and the thickness setting may also be used to eliminate chromatic aberration, while the design of the positive meniscus lens may be used to collect light spots or refract a point light source into a collimated beam, and the focal length may also be reduced when used together with other collimating lenses, so as to increase the numerical aperture of the optical lens of the projection device. Further, in a specific application, the first collimating lens 310 of the present embodiment is a positive meniscus lens, and the concave surface of the first collimating lens faces the light source 200 to convert the point light source into parallel light.

In this embodiment, the second collimating lens 320 is a biconvex lens, and is used for relaying imaging and converging light beams.

In this embodiment, the third collimating lens 330 is a negative meniscus lens, and the center of the third collimating lens 330 is thinner than the edges thereof, so as to cause the light to diverge or converge, and further, in this embodiment, the third collimating lens 330 is a negative meniscus lens, and the convex surface of the third collimating lens is directed toward the second collimating lens 320, that is, toward the light source 200.

In this embodiment, the fourth collimating lens 340 is a plano-convex lens. It will be appreciated by those skilled in the art that the specific materials, sizes, focal points, and focal lengths of the first collimating lens 310, the second collimating lens 320, the third collimating lens 330, and the fourth collimating lens 340 may be set according to actual requirements, and may be flexibly adjusted according to design requirements, which is not limited in the embodiments of the present application.

In order to reduce the volume of the finished product, in one embodiment, the first collimating lens 310, the second collimating lens 320, the third collimating lens 330 and the fourth collimating lens 340 are arranged with adjustable pitches. The arrangement, in which the respective collimating lenses of the collimating lens group 300, including the first collimating lens 310, the second collimating lens 320, the third collimating lens 330 and the fourth collimating lens 340, have adjustable pitches therebetween, is beneficial to ensuring the projection performance so as to avoid distortion, thereby being beneficial to better presenting the pattern effect in a projection manner, being easy to adjust the position under the premise of integrally controlling the position in cooperation with the overall structural design, and having the advantage of small volume as a whole, and being particularly suitable for the miniaturized optical lens 100 of the projection device.

Referring to fig. 3, the projection lens assembly 400 includes a first projection lens 410, a second projection lens 420, a third projection lens 430, a fourth projection lens 440, a fifth projection lens 450 and a sixth projection lens 460, which are sequentially disposed, wherein the first projection lens 410, the second projection lens 420, the third projection lens 430, the fourth projection lens 440, the fifth projection lens 450 and the sixth projection lens 460 are used to match and amplify the parallel light from the collimating lens assembly 300 for projection imaging; in one embodiment, the first projection lens 410 has positive power, the second projection lens 420 has positive power, the third projection lens 430 and the fourth projection lens 440 together have positive power, the fifth projection lens 450 has negative power, and the sixth projection lens 460 has positive power. The structural design is favorable for quickly adjusting the projection condensing position, and ensures projection performances such as projection angle, projection brightness, definition, distortion and the like, thereby avoiding projection distortion and ensuring accurate and quick presentation of pattern effects.

In one embodiment, the first projection lens 410 is a biconvex lens, the second projection lens 420 is a positive meniscus lens, the third projection lens 430 and the fourth projection lens 440 are cemented lens combinations, the fifth projection lens 450 is a negative meniscus lens, and the sixth projection lens 460 is a positive meniscus lens. In this embodiment, the second projection lens 420 is disposed opposite to the sixth projection lens 460.

In order to further reduce the volume of the product, in one embodiment, as shown in fig. 4 and 5, the first projection lens 410, the second projection lens 420, the third projection lens 430 and the fourth projection lens 440 can be arranged with adjustable pitches. The structural design is easy to realize position adjustment on the premise of overall control position, and is favorable for ensuring the projection performance so as to avoid distortion, thereby being favorable for better presenting the pattern effect in a projection mode; on the other hand, the volume of the projection lens group 400 is reduced in cooperation with the overall structural design, so that the volume of the optical lens 100 of the projection device is reduced.

To further reduce the final volume, in one embodiment, the spacing between the fifth projection lens 450 and the sixth projection lens 460 may be adjustable. In one embodiment, the first projection lens 410, the second projection lens 420, the third projection lens 430 and the fourth projection lens 440 are disposed with adjustable spacing therebetween; and, the interval between the fifth projection lens 450 and the sixth projection lens 460 can be adjusted. The rest of the embodiments are analogized and will not be described in detail. Such a structural design is beneficial to ensuring the projection performance so as not to be distorted, thereby being beneficial to better presenting the pattern effect in a projection mode, and being beneficial to reducing the volume of the optical lens 100 of the projection device in cooperation with the overall structural design.

In one embodiment, as shown in fig. 4 and 5, a gap exists between the fourth projection lens 440 and the fifth projection lens 450 for placing the diaphragm 470. In this embodiment, the imaging of the cemented lens combination passes through the aperture of the aperture 470. In one embodiment, the optical lens 100 of the projection device further includes the diaphragm 470, and the optical lens 100 of the projection device controls imaging through the diaphragm 470 therein, and the specific imaging mode may refer to the conventional technology. Further, in an embodiment of a specific application, an adjustable mounting position is further provided between the fourth projection lens 440 and the fifth projection lens 450 in the optical lens 100 of the projection device, the adjustable mounting position is used for mounting the diaphragm 470, and the adjustable mounting position is adjustably set with respect to the positions of the fourth projection lens 440 and the fifth projection lens 450.

In one embodiment, as shown in fig. 6, the optical lens 100 of the projection device further includes the light source 200. The first collimating lens 310 is disposed adjacent to the light source 200, and the light emitted from the light source 200 enters the first collimating lens 310 as incident light. In one embodiment, the light source 200 is an LED light source; in one embodiment, the optical lens 100 of the projection device further includes the light source 200, and the light source 200 is an LED light source. The rest of the embodiments are analogized and will not be described in detail. The LED light source has the advantages of low energy consumption, high brightness of emergent light, more concentrated direction, easy control of the direction and the like.

Referring to fig. 7, in various embodiments, the fourth collimating lens 340 is adjacent to the first projection lens 410, and a gap exists between the fourth collimating lens 340 and the first projection lens 410 for placing the projection film 500. The type of the projector 500 is not limited, and further, in an embodiment of a specific application, a slot is further provided between the fourth collimating lens 340 and the first projection lens 410 in the optical lens 100 of the projection device, and the slot is used for placing the projector 500 in an inserting manner.

In one embodiment, as shown in fig. 8, the optical lens 100 of the projection device is applied, the incident light emitted by the light source 200 is converted into parallel light by the collimating lens group 300, and is irradiated onto the projection lens 500, and is incident on the projection lens group 400, and the projection lens group 400 amplifies and focuses the light containing the image of the projection lens 500 at the projection position 600.

In one embodiment, the optical lens 100 of the projection device further includes a first bracket and a second bracket, and the positions of the collimating lens group 300 and the projection lens group 400 are respectively adjusted by the first bracket and the second bracket. With such a structural design, the optical lens 100 of the projection device has a simple structure, is easy to adjust the relative position, and is beneficial to reducing the appearance of the whole optical system.

The first collimating lens 310, the second collimating lens 320, the third collimating lens 330 and the fourth collimating lens 340 are all disposed on the first bracket, and the relative positions of the collimating lens group 300 and the light source 200 are integrally adjusted by the first bracket; or the positions of the first collimating lens 310, the second collimating lens 320, the third collimating lens 330 and the fourth collimating lens 340 are respectively adjusted by the first bracket, that is, the relative positions of the first collimating lens 310, the second collimating lens 320, the third collimating lens 330 and the fourth collimating lens 340 and the light source 200 are respectively adjusted by the first bracket. Such a structural design facilitates rapid adjustment of the collimating lens group 300 to accommodate variations in the light source 200.

The first projection lens 410, the second projection lens 420, the third projection lens 430, the fourth projection lens 440, the fifth projection lens 450 and the sixth projection lens 460 are all disposed on the second bracket, the relative positions of the first projection lens 410, the second projection lens 420, the third projection lens 430 and the fourth projection lens 440 and the collimating lens group 300 are integrally adjusted by the second bracket, and the relative positions of the fifth projection lens 450 and the sixth projection lens 460 and the projection position 600 are integrally adjusted by the second bracket. Such a structural design is beneficial to quickly adjusting the projection lens group 400, and is beneficial to ensuring projection performance such as projection angle, projection brightness, definition, distortion and the like so as not to be distorted on the premise of ensuring collimation effect, thereby being beneficial to better presenting pattern effect in a projection mode.

For the embodiment having the aperture 470, the first projection lens 410, the second projection lens 420, the third projection lens 430, the fourth projection lens 440, the aperture 470, the fifth projection lens 450 and the sixth projection lens 460 are all disposed on the second bracket, the relative positions of the first projection lens 410, the second projection lens 420, the third projection lens 430 and the fourth projection lens 440 and the collimator lens assembly 300 are integrally adjusted by the second bracket, the relative positions of the aperture 470 and the light source 200 are integrally adjusted by the second bracket, or the relative positions of the fifth projection lens 450 and the sixth projection lens 460 and the aperture 470 are integrally adjusted by the second bracket.

With continued reference to fig. 1 to 8, the optical lens 100 of the projection apparatus is illustrated, the light source 200 is an LED light source, the optical lens 100 of the projection apparatus includes two groups of lenses, and the collimating lens group 300 and the projection lens group 400 are respectively arranged from the light outlet of the LED to the projection surface.

The collimating lens group 300 includes four lenses, which are in sequence: the collimator comprises a first collimating lens 310 with positive focal power, a second collimating lens 320 with positive focal power, a third collimating lens 330 with negative focal power and a fourth collimating lens 340 with positive focal power, wherein the first collimating lens 310 is a plano-convex lens or a positive meniscus lens, the second collimating lens 320 is a biconvex lens, the third collimating lens 330 is a negative meniscus lens, and the fourth collimating lens 340 is a biconvex lens or a plano-convex lens.

The projection lens group 400 has six lenses, which are in turn: the first projection lens 410 with positive optical power, the second projection lens 420 with positive optical power, the third projection lens 430 with positive optical power, the fourth projection lens 440 with negative optical power, the fifth projection lens 450 with negative optical power and the sixth projection lens 460 with positive optical power are combined, wherein the first projection lens 410 is a biconvex lens, the second projection lens 420 is a positive meniscus lens, the third projection lens 430 and the fourth projection lens 440 are combined by a cemented lens, the fifth projection lens 450 is a negative meniscus lens, and the sixth projection lens 460 is a positive meniscus lens. A gap exists between the fourth projection lens 440 and the fifth projection lens 450 for placing a diaphragm 470, and the imaging of the cemented lens combination passes through the diaphragm aperture of the diaphragm 470.

The collimating lens group 300 collimates the light emitted from the LED light source into parallel light to be projected onto the pattern of the projector sheet 500, i.e., film, and then the film pattern is projected onto the projection location 600, e.g., screen, through the projection lens group 400, i.e., the projection lens.

Specifically, the optical lens 100 of the projection device of the present application can be matched with a film projection screen of 5mm to 30mm, and the above embodiments are adopted to provide specific parameters of each lens, including a first collimating lens 310, a second collimating lens 320, a third collimating lens 330, a fourth collimating lens 340, a first projection lens 410, a second projection lens 420, a third projection lens 430, a fourth projection lens 440, a fifth projection lens 450 and a sixth projection lens 460, as shown in the following table.

Surface serial number	Radius of curvature/mm	Spacing/mm	Refractive index nd	Dispersion Vd	Caliber/mm
						Luminous surface		2.64			3
1	-118.06	7.9	1.639	55.45	5.8
						2	-11.5	0.3			8.2
3	46.1	5.7	1.639	55.45	10
						4	-24.8	0.3			10
5	30.67	1.6	1.673	32.17	10
						6	15.37	2.59			9.2
7	94.37	4.65	1.639	55.45	10
						8	-20.47	2.5			10
9	Positive infinity	13.26			8
						10	62.7	5	1.804	46.57	10
11	-24.41	0.2			10
						12	11.63	4.5	1.804	46.57	8
13	51.2	0.73			8
						14	-235.9	1.2	1.805	25.46	6.6
16	6.55	4.42	1.804	46.57	5.1
						17	19.02	2.08			3.8
Diaphragm	Positive infinity	4.8			2.6
						19	-5	2.61	1.487	70.44	4.4
20	-10.45	0.2			7.1
						21	-54.5	4.5	1.804	46.57	9.6
22	-17.79	10			10.7

In the above table, the interval is the intersection point of the central axis and the vertex of the lens, the distance between the central axis and other intersection points or other positions, the interval or the thickness is a common parameter in the optical design industry, the object of the optical model research is each surface, and the interval refers to the interval between two adjacent curved surface vertexes on the axis or the interval between two curved surface vertexes on the symmetry axis. The distance between the lenses may be expressed in terms of a spacing, such as the back surface of the first lens and the front surface of the second lens, and the thickness of the lenses, i.e., the spacing between the front and back surfaces of the lenses, may also be expressed in terms of a spacing.

The intersection point 1 is an intersection point between one surface of the first collimating lens 310 adjacent to the light source 200 and the central axis, the interval between the intersection point 1 and the intersection point between the light emitting surface of the light source 200 and the central axis is 2.64mm, the intersection point 2 is an intersection point between one surface of the first collimating lens 310 adjacent to the second collimating lens 320 and the central axis, the interval between the intersection points 1 and 2 is the thickness of the first collimating lens 310 on the central axis, and other intersection points are similar. Wherein the refractive index of the first collimating lens 310 is 1.639 and the dispersion is 55.45.

Intersection 3 is an intersection of a side of the second collimating lens 320 adjacent to the first collimating lens 310 and the central axis, and intersection 4 is an intersection of a side of the second collimating lens 320 adjacent to the third collimating lens 330 and the central axis; the refractive index of the second collimating lens 320 is 1.639 and the dispersion is 55.45, but the aperture is different from that of the first collimating lens 310. Other intersections, etc.

Similarly, the intersection 19 is an intersection between a surface of the fifth projection lens 450 adjacent to the aperture 470 and the central axis, and the intersection 20 is an intersection between a surface of the fifth projection lens 450 adjacent to the sixth projection lens 460 and the central axis.

The intersection point 21 is an intersection point between a surface of the sixth projection lens 460 adjacent to the fifth projection lens 450 and the central axis, and the intersection point 22 is an intersection point between a surface of the sixth projection lens 460 adjacent to the projection position 600 and the central axis. The intersection 22 is typically spaced from the projection location 600 by more than 10 mm, and in particular applications, the intersection 22 is typically spaced from the projection location 600 by more than 1000 mm or more than 10000 mm, i.e., 10 meters.

In the conventional projection lamp, for example, a logo projection lamp is usually formed by bonding one lens and two lenses, the aperture is generally smaller than F2.4, usually about F2.4-F2.8, the projection angle is about 15 degrees-30 degrees, and the definition is usually not higher than 10lp/mm.

In contrast, the optical lens 100 of the projection device manufactured by the above embodiment has the aperture reaching F1.8-F2.3, or even reaching F1.6-F2.3, and the brightness is improved by about 30% -50% through trial and test; the projection angle is about 50-55 degrees, and the definition is higher than 30lp/mm.

Taking a film with a diameter of 15mm as an example, when the projection angle is 53 degrees, the distortion is about 1.52 percent, the uniformity is better than 86 percent, and the aperture can reach F1.6 to F2.3.

Therefore, the optical lens 100 of the projection device of the present application has the advantage of high definition compared with the conventional product, and improves the uniformity of brightness and the projection angle of the picture, the projection picture angle is large, the 50-55 ° large-angle projection can be realized, and the optical lens has better distortion and uniformity under the large-angle projection, and the definition and the uniformity of brightness of the picture are greatly improved compared with the conventional product, thereby being beneficial to the pattern projection meeting more details.

In one embodiment, a projection device includes a body and the projection device optical lens 100 of any embodiment, the projection device optical lens 100 being mounted on the body. According to the projection equipment, the optical lens is only provided with two lens groups, so that on one hand, the structure is simple, the relative position is easy to adjust, and the appearance of the whole optical system is reduced; on the other hand, under the premise of ensuring the collimation effect, the four collimation lenses are matched with the six projection lenses, so that the projection performance such as projection angle, projection brightness, definition, distortion and the like can be ensured to avoid distortion, and the pattern effect can be better presented in a projection mode.

It should be noted that other embodiments of the present application further include a projection device and an optical lens thereof, where the projection device is formed by combining technical features of the above embodiments.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be determined from the following claims.

Claims (10)

1. An optical lens (100) of a projection device, comprising a collimating lens group (300) and a projection lens group (400);

The collimating lens group (300) comprises a first collimating lens (310) with positive focal power, a second collimating lens (320) with positive focal power, a third collimating lens (330) with negative focal power and a fourth collimating lens (340) with positive focal power which are sequentially arranged, wherein the first collimating lens (310), the second collimating lens (320), the third collimating lens (330) and the fourth collimating lens (340) are used for being matched to convert incident light rays of the light source (200) into parallel light;

The projection lens group (400) comprises a first projection lens (410), a second projection lens (420), a third projection lens (430), a fourth projection lens (440), a fifth projection lens (450) and a sixth projection lens (460) which are sequentially arranged, wherein the first projection lens (410), the second projection lens (420), the third projection lens (430), the fourth projection lens (440), the fifth projection lens (450) and the sixth projection lens (460) are used for being matched to amplify, project and image the parallel light from the collimating lens group (300);

Wherein the fourth collimating lens (340) is adjacent to the first projection lens (410), and a gap exists between the fourth collimating lens (340) and the first projection lens (410) for placing a projection film (500);

A gap exists between the fourth projection lens (440) and the fifth projection lens (450) for placing a diaphragm (470).

2. The projection device optical lens (100) of claim 1, wherein the first collimating lens (310) is a plano-convex lens or a positive meniscus lens, the second collimating lens (320) is a biconvex lens, the third collimating lens (330) is a negative meniscus lens, and the fourth collimating lens (340) is a biconvex lens or a plano-convex lens.

3. The projection device optical lens (100) of claim 2, wherein the first collimating lens (310), the second collimating lens (320), the third collimating lens (330) and the fourth collimating lens (340) are arranged with adjustable spacing therebetween.

4. The projection device optical lens (100) of claim 1, wherein the first projection lens (410) has positive optical power, the second projection lens (420) has positive optical power, the third projection lens (430) and the fourth projection lens (440) together have positive optical power, the fifth projection lens (450) has negative optical power, and the sixth projection lens (460) has positive optical power.

5. The projection device optical lens (100) of claim 4, wherein the first projection lens (410) is a biconvex lens, the second projection lens (420) is a positive meniscus lens, the third projection lens (430) and the fourth projection lens (440) are a cemented lens combination, the fifth projection lens (450) is a negative meniscus lens, and the sixth projection lens (460) is a positive meniscus lens.

6. The projection device optical lens (100) of claim 5, wherein the first projection lens (410), the second projection lens (420), the third projection lens (430) and the fourth projection lens (440) are adjustably positioned with respect to each other; or alternatively

-A spacing adjustable arrangement between the fifth projection lens (450) and the sixth projection lens (460); or alternatively

-Said second projection lens (420) is arranged opposite to said sixth projection lens (460); or alternatively

The imaging of the cemented lens combination passes through a diaphragm aperture of the diaphragm (470).

7. The projection device optical lens (100) of any of claims 1 to 6, further comprising the aperture (470).

8. The projection device optical lens (100) of claim 7, further comprising a first mount and a second mount;

the first collimating lens (310), the second collimating lens (320), the third collimating lens (330) and the fourth collimating lens (340) are all arranged on the first bracket, and the relative positions of the collimating lens group (300) and the light source (200) are integrally adjusted through the first bracket;

The first projection lens (410), the second projection lens (420), the third projection lens (430), the fourth projection lens (440), the diaphragm (470), the fifth projection lens (450) and the sixth projection lens (460) are all arranged on the second support, the relative positions of the first projection lens (410), the second projection lens (420), the third projection lens (430), the fourth projection lens (440) and the collimating lens group (300) are integrally adjusted through the second support, and the relative positions of the diaphragm (470) and the light source (200) are integrally adjusted through the second support, and the relative positions of the fifth projection lens (450), the sixth projection lens (460) and the diaphragm (470) are integrally adjusted through the second support.

9. The projection device optical lens (100) of claim 7, further comprising the light source (200), and wherein the light source (200) is an LED light source.

10. A projection device characterized by comprising a body and the projection device optical lens (100) of any one of claims 1 to 9 mounted on the body.