CN114216078A

CN114216078A - Lighting lamp

Info

Publication number: CN114216078A
Application number: CN202010918799.8A
Authority: CN
Inventors: 张权; 陈辉; 陈彬
Original assignee: YLX Inc
Current assignee: YLX Inc
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2022-03-22

Abstract

The embodiment of the invention provides an illuminating lamp, which comprises a light source, a lens array, a collimating optical element and a reflector array, wherein the lens array comprises a plurality of lens units and is used for dividing light emitted by the light source into a plurality of sub-beams and converging the sub-beams respectively, the distance between the converging point of the sub-beams and the focal plane of the collimating optical element is less than or equal to 10% of the focal length of the collimating optical element, the collimating optical element is used for collimating the sub-beams, and the reflector array is used for receiving the collimated sub-beams to reflect the sub-beams to form a light spot array. The illuminating lamp disclosed by the invention is simple in structure, convenient to install, small in size and beneficial to realizing miniaturization of the illuminating lamp, and can effectively avoid the generation of stray light, improve the contrast of projected light spot patterns and improve the decorative illuminating effect.

Description

Lighting lamp

Technical Field

The invention relates to the technical field of illumination, in particular to an illumination lamp.

Background

In the field of lighting, light fixtures are used to emit a beam of light to provide a lighting effect desired by a user. With the improvement of living standard of people, the demand of decorative lighting is higher and higher. The starry sky decoration lamp can project a large number of starry or snowflake-shaped light spots, can play a role in creating atmosphere and decorating landscape, and is widely applied to occasions such as parks, KTVs, stages, courtyards, lawns and the like.

In order to increase the number of projected light spots, the conventional starry sky decoration lamp usually surrounds a light collecting device with a plurality of plane mirrors around a light emitting point to form a plurality of equivalent virtual light emitting points, and the more plane mirrors, the more equivalent virtual light emitting points, and the more light spots projected finally. However, the above solution has the following disadvantages: firstly, the planar reflector is inconvenient to mount, the number is limited, and the occupied space is large; secondly, gaps between the plane reflectors and the fixed structure can form a lot of stray light, so that the contrast of the light spot pattern is poor, and the light spot effect is influenced.

Disclosure of Invention

The embodiment of the invention provides an illuminating lamp, which aims to solve the technical problem.

The embodiment of the invention provides an illuminating lamp, which comprises a light source, a lens array, a collimating optical element and a reflector array, wherein the lens array comprises a plurality of lens units and is used for dividing light emitted by the light source into a plurality of sub-beams and converging the sub-beams respectively, the distance between the converging point of the sub-beams and the focal plane of the collimating optical element is less than or equal to 10% of the focal length of the collimating optical element, the collimating optical element is used for collimating the sub-beams, and the reflector array is used for receiving the collimated sub-beams to reflect the sub-beams to form a light spot array.

In one embodiment, the divergence angle of the light emitted by the light source is less than or equal to 60 degrees.

In one embodiment, the size of at least one lens unit is different from the size of the other lens units.

In one embodiment, at least one lens unit has a focal length different from the focal lengths of the other lens units, and the plurality of lens units are located in a non-identical plane.

In one embodiment, the lens array includes a middle region and a peripheral region, the size and focal length of the lens cells located in the middle region are larger than the size and focal length of the lens cells located in the peripheral region, and the distance from the focal plane of the lens cells located in the middle region is larger than the distance from the focal plane of the lens cells located in the peripheral region.

In one embodiment, the lighting fixture further comprises a diaphragm located at the focal plane, the diaphragm comprising a plurality of through holes corresponding to the convergence points of the plurality of sub-beams, respectively.

In one embodiment, the lighting fixture further comprises a polygon prism located between the diaphragm and the collimating optical element, the polygon prism comprises at least two prism units, the incident surfaces or the emergent surfaces of the at least two prism units have different inclination angles, and at least one sub-beam is incident on the at least two prism units.

In one embodiment, the lighting fixture further comprises a color filter between the diaphragm and the collimating optics, the color filter covering the optical path of the at least one sub-beam.

In one embodiment, the lighting fixture further comprises a reflector located between the diaphragm and the collimating optics for collecting and reflecting part of the light rays of the sub-beams towards the collimating optics.

In one embodiment, the lighting fixture further comprises a convex lens between the diaphragm and the collimating optics for collecting light rays that are not reflected by the reflector.

In one embodiment, an angle enlarging element is provided between the light source and the at least one lens unit.

In one embodiment, the light source includes at least two sub light sources and a light combining device, the at least two sub light sources are respectively located at different sides of the light combining device, and the light combining device is configured to combine the lights emitted by the plurality of sub light sources into one beam.

In one embodiment, the light source includes a plurality of sub-light sources, the plurality of sub-light sources are arranged in an array, and each sub-light source corresponds to one lens unit.

In one embodiment, the lighting fixture further comprises a driving device for driving the lens array to rotate.

The embodiment of the invention provides an illumination lamp, which comprises a light source, a lens array, a collimating optical element and a reflector array, wherein the light source is used for emitting parallel or nearly parallel light, the lens array comprises a plurality of lens units and is used for dividing the light emitted by the light source into a plurality of sub-beams and respectively converging the sub-beams, the sub-beams are focused on a focal plane or the vicinity of the focal plane of the collimating optical element, the collimating optical element is used for collimating the sub-beams, and the reflector array is used for receiving the collimated sub-beams to form a light spot array through reflection. The invention divides the light emitted by the light source into a plurality of sub-beams through the lens array, and focuses the plurality of sub-beams on the focal plane of the collimating optical element or the vicinity of the focal plane, the convergence point of each sub-beam is equivalent to a light emitting point, and then the plurality of sub-beams are collimated into a plurality of sub-collimated beams through the collimating optical element, so that the reflector array reflects the sub-beams to form the light spot array.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a lighting fixture according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a lighting fixture according to a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of a lighting fixture according to a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of a lighting fixture according to a fourth embodiment of the present invention;

fig. 5 is a schematic structural diagram of a lighting fixture according to a fifth embodiment of the present invention;

fig. 6 is a schematic structural diagram of a lighting fixture according to a sixth embodiment of the present invention;

fig. 7 is a schematic structural diagram of a lighting fixture according to a seventh embodiment of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the attached drawings. It is to be understood that the described embodiments are merely exemplary of some, and not necessarily all, embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, belong to the protection scope of the present invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The first implementation mode comprises the following steps:

referring to fig. 1, fig. 1 is a schematic structural diagram of a lighting fixture 100 according to an embodiment of the present invention. The lighting fixture 100 includes a light source, a lens array 120, a collimating optical element 130, and a reflector array 140.

The light source is used for emitting light, the lens array 130 includes a plurality of lens units, which are used for dividing the light emitted from the light source into a plurality of sub-beams and respectively converging the plurality of sub-beams, the plurality of sub-beams are focused on a focal plane of the collimating optical element 130, the collimating optical element 130 is used for collimating the plurality of sub-beams, and the reflector array 140 is used for receiving the collimated plurality of sub-beams to form a light spot array by reflection.

Specifically, in the present embodiment, the light source may include a point light source 111 and an optical collection system 112, the point light source 111 emits light with a certain divergence angle, and the point light source 111 has a larger divergence angle, and the divergence angle thereof is typically 120 degrees and 160 degrees. The optical collection system 112 receives the light emitted by the point light source 111 and compresses it into light of a small divergence angle, for example, into light of a divergence angle of 60 degrees or less, i.e., the light emitted by the light source has a divergence angle of 60 degrees or less. It will be appreciated that the smaller the divergence angle of the light emitted from the light source, the more effective the subsequent optics processing, preferably the light emitted from the light source is a parallel or near-parallel beam. The point light source 111 may be an LED or a laser fluorescent light source emitting white light, and when the point light source 111 is a laser fluorescent light source, the point light source 111 may include a blue laser diode and a yellow fluorescent sheet, the fluorescent sheet converts a blue laser part emitted from the laser diode into yellow light, and finally the unconverted blue laser and the yellow light emitted from the phosphor are mixed to form white light. The optical collection system 112 may be a convex lens, a convex lens group, a reflective cup or a TIR lens, which collects light with a divergent angle emitted from the point light source 111 and collimates the light into parallel light, and when the optical collection system 112 is a convex lens group, the number of the convex lenses may be 2-4, and the specific number may be determined according to practical requirements, for example, the optical collection system 112 is a convex lens group, and the convex lens group includes two convex lenses, namely a convex lens 1121 and a convex lens 1122. Although the light source is illustrated as emitting white light in this embodiment, it is fully possible for those skilled in the art to replace the light source with a light source emitting red, green, or other different colors, so as to obtain a projection spot with a different color, and such a simple replacement is also included in the scope of the present invention.

Further, in order to improve the brightness of the light spot projected by the lighting fixture 100, the light source may include at least two sub light sources and a light combining device, where the at least two sub light sources are respectively located at different sides of the light combining device, and the light combining device is configured to combine the lights emitted by the plurality of sub light sources into one beam.

In one embodiment, the light source comprises a first sub light source, a second sub light source and a light combining device, wherein the first sub light source and the second sub light source emit parallel or near-parallel light with different color bands, the first sub light source comprises a first point light source and a first optical collecting system, the first point light source is a laser fluorescence light source emitting yellow light, the first optical collecting system is two convex lenses, and the first optical collecting system collects the yellow light emitted by the first point light source at a certain angle and collimates the yellow light into yellow parallel light; the second sub-light source comprises a second point light source and a second optical collecting system, the second point light source is an LED light source emitting blue light, the second optical collecting system comprises two convex lenses, the light combining device is a dichroic sheet transmitting the blue light and reflecting yellow light, the first point light source and the second point light source are respectively arranged on two sides of the light combining device, the optical axes of the first point light source and the second point light source form an included angle of 45 degrees with the light combining device, and the light combining device combines yellow parallel light emitted by the first point light source and blue parallel light emitted by the second point light source into a white parallel light beam.

In another embodiment, the light source includes a third sub-light source, a fourth sub-light source, a fifth sub-light source and a light combining device, the third sub-light source, the fourth sub-light source and the fifth sub-light source emit parallel or near-parallel light with different color bands, respectively, wherein the third sub-light source includes a third point light source and a third optical collecting system, the third point light source is an LED light source emitting red light, the third optical collecting system is two convex lenses, and the third optical collecting system collects red light emitted by the third point light source at a certain angle and collimates the red light into red parallel light; the fourth sub-light source comprises a fourth point light source and a fourth optical collecting system, the fourth point light source is an LED light source emitting blue light, the fourth optical collecting system is two convex lenses, and the fourth optical collecting system collects the blue light emitted by the fourth point light source at a certain angle and collimates the blue light into blue parallel light; the fifth sub-light source comprises a fifth point light source and a fifth optical collecting system, the fifth point light source is an LED light source emitting green light, the fifth optical collecting system is two convex lenses, and the fifth optical collecting system collects the green light emitted by the fifth point light source at a certain angle and collimates the green light into green parallel light; the light combination device comprises a dichroic sheet and a dichroic sheet which are arranged in an X shape, the dichroic sheet can transmit blue light and reflect red light, the dichroic sheet transmits blue light and reflects green light, and red parallel light emitted by a third point light source, blue parallel light emitted by a fourth point light source and green parallel light emitted by a fifth point light source are combined into a white parallel light beam by the light combination device.

In the two schemes, the emitted lights of the plurality of sub-light sources are combined into one beam by the light combining device, so that the brightness of the light spots projected by the lighting lamp 100 is improved. It can be understood that the number and color of the plurality of sub-light sources may be determined according to the actual situation, and are not limited to the above two schemes, and the color of the light beam combined by the light combining device is not limited to white light, but may be other colors.

Of course, the light source may also include a plurality of sub-light sources, the plurality of sub-light sources are arranged in an array, and each sub-light source corresponds to one lens unit. The number of the sub light sources is the same as that of the lens units, each sub light source comprises a point light source, and the point light sources are arranged on the same base and located on the same plane. As mentioned above, the point light sources may be LEDs emitting white light or laser fluorescent light sources, and the light emitting side of each point light source is provided with an optical collecting system for collecting light emitted from the point light source and compressing the light into light with a small divergence angle. Preferably, the light emitted by each point light source is collected by the optical collection system and compressed to form parallel or nearly parallel light beams. Each sub-light source corresponds to one lens unit, so that the lens single light receives and processes the light emitted by the corresponding sub-light source. The light source adopts a plurality of sub light sources arranged in a matrix, so that the brightness of light spots projected by the lighting lamp 100 can be improved, and the problem that light emitted from a point light source in a large angle is yellow due to dispersion after being collected by the optical collection system when a single sub light source is used can be solved, so that the color of the light spots projected by the lighting lamp 100 is uniform.

The lens array 120 includes a plurality of lens units disposed on the light emitting side of the light source for receiving the light emitted from the light source and dividing the light into a plurality of sub-beams. In the present embodiment, the lens array 120 is a fly-eye lens array, the lens units of the lens array 120 are closely arranged in the same plane, and each lens unit receives and converges a part of the light emitted from the light source, so as to form a sub-beam. The shape of the plurality of lens cells may be rectangular, hexagonal, or other polygonal shape. The plurality of lens units may have the same size, and each lens unit receives light emitted from the light source with the same light quantity, so that the light quantity of each sub-beam is the same, and the brightness of the light spot array projected by the lighting fixture 100 can be uniformly distributed. Of course, the sizes of the lens units may be different, that is, the size of at least one lens unit is different from the sizes of the other lens units, and with such an arrangement, the lens unit with a larger size may receive light emitted from the light source with a larger light quantity, and the lens unit with a smaller size may receive light emitted from the light source with a smaller light quantity, so that the brightness and the size of a part of light spots in the light spot array projected by the lighting fixture 100 are larger than those of other light spots, and an effect of staggered distribution of the light spots with the larger size and the light spots with the smaller size is achieved.

The collimating optical element 130 may be a collimating lens, the plurality of sub-beams are focused on a focal plane of the collimating optical element 130, a convergence point (image point) of each sub-beam is equivalent to a light emitting point, the sub-beams emitted to the collimating optical element 130 may be equivalently emitted by the light emitting point, after the plurality of sub-beams are refracted and collimated by the collimating optical element 130, a divergence angle of the beams becomes smaller, so as to form a plurality of sub-collimated beams, and because the plurality of sub-beams are incident on the collimating optical element 130 at different angles, the plurality of sub-beams are refracted and collimated by the collimating optical element 130, so as to form a plurality of sub-collimated beams propagating along different angles. Of course, in practical settings, the convergence point of the plurality of sub-beams may deviate from the focal plane of the collimating optical element 130 to a certain extent, such that the plurality of sub-beams are focused near the focal plane of the collimating optical element 130, which is acceptable, for example, to make the distance between the convergence point of the plurality of sub-beams and the focal plane of the collimating optical element 130 less than or equal to 10% of the focal length of the collimating optical element 130. It can be understood that the closer the convergence point of the sub-beams is to the focal plane of the collimating optical element 130, the better the collimating effect of the sub-beams after passing through the collimating optical element 130 can be obtained. The collimating lens may be spherical or aspherical, preferably an aspherical collimating lens, which may achieve a better degree of collimation.

The mirror array 140 includes a plurality of plane mirrors arranged in an array along a curved surface, which may be a concave surface, a convex surface, or a cylindrical surface. After the plurality of sub-collimated light beams emitted from the light collimating element 130 are incident on the mirror array 214, each plane mirror respectively receives a small part of light in each sub-collimated light beam and reflects the small part of light to a distant target projection surface, because the plurality of plane mirrors are arranged along a curved surface, the normal direction of each plane mirror is slightly changed, so that the directions of a plurality of reflected light beams reflected by the plane mirrors are also different, thereby forming an array of a plurality of light spots on the target projection surface, the number of the light spots is approximately multiplied by the number of the sub-light beams divided by the lens array and the number of the plane mirrors receiving the sub-collimated light beams, and the number of the light spots can be increased by multiple times, thereby realizing the lighting effect of 'starry sky'.

The lighting fixture 100 may further include a driving device connected to the lens array 120 to drive the lens array 120 to rotate, so as to change the propagation direction of the plurality of sub-beams divided by the lens array 120, and form a dynamic light spot array effect after being reflected by the reflector array 140. Preferably, the driving device drives the lens array 120 to rotate along the central axis of the lens array 120, so that the special effect of rotating the surrounding light spots around the center can be achieved.

In addition, the lighting fixture 100 may also include a driving mechanism connected to the reflector array 140 to drive the reflector array 40 to rotate or periodically move, so as to change the emitting direction of the reflected light, thereby forming a dynamic light spot array effect.

In the first embodiment of the present invention, the lens array 120 divides the light emitted from the light source into a plurality of sub-beams, and the plurality of sub-beams are focused on or near the focal plane of the collimating optical element 130, the convergence point of each sub-beam is equivalent to a light emitting point, and then the plurality of sub-beams are collimated into a plurality of sub-collimated beams by the collimating optical element 130, so that the reflector array 140 reflects to form a light spot array, the proposal can realize the increase of the number of projected light spots only by means of the splitting of the light emitted by the light source by one lens array 120, reduces the number of devices to be installed, and do not have the clearance that makes the space increase, simple structure, simple to operate, it is small, be favorable to realizing illumination lamps and lanterns 100's miniaturization, thereby also can avoid stray light's production effectively because of not having gapped existence, improved the contrast of projecting the facula pattern, promote decorative lighting effect.

The second embodiment:

fig. 2 is a schematic structural diagram of a lighting fixture 200 according to a second embodiment of the present invention. In fig. 3, the same components as those in fig. 1 are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in fig. 2, the lighting fixture 200 includes a light source, a lens array 220, a collimating optic 130, and a reflector array 140. The lighting fixture 200 is different from the lighting fixture 100 provided in the first embodiment in that the lens units of the lens array 220 are located in different planes, and the focal length of at least one lens unit is different from the focal lengths of the other lens units, that is, the focal length of at least one lens unit has a larger focal length, and the focal length of at least one lens unit has a smaller focal length. In order to collimate the plurality of sub-beams split by the plurality of lens units by the collimating optical element 130 and then respectively form collimated beams, when necessary, the convergence point of each sub-beam is located at the focal plane of the collimating optical element 130, because the focal lengths of the lens units are different, the lens unit with the larger focal length is arranged to be farther away from the collimating optical element 130, the lens unit with the smaller focal length is arranged to be closer to the collimating optical element 130, so that the convergence points of the sub-beams split by each lens unit are all located at the focal plane of the collimating optical element 130, and then the sub-beams can be collimated by the collimating optical element 130.

Further, the lens array 220 includes a middle area and a peripheral area, the size and focal length of the lens unit 221 located in the middle area are larger than those of the lens unit 222 located in the peripheral area, and the distance from the focal plane of the lens unit located in the middle area is larger than that of the lens unit located in the peripheral area. Since the lens unit 221 located in the middle region has a larger size, the lens unit 221 can receive light emitted from a light source with a larger light quantity, the sub-beams divided by the lens unit 221 are reflected by the mirror array 140 to form light spots with a larger brightness and size than the sub-beams divided by the lens unit 222, and the sub-beams are reflected by the mirror array 140 to form light spots with a larger brightness and size, and since the lens unit 221 is located in the middle region and the lens units 221 are located in the peripheral region, the effect that a plurality of smaller and darker light spots surround the larger and brighter light spots is achieved.

In order to obtain a larger-sized spot, an angle enlarging element, which may be a diffusion sheet, a single fly-eye or a double fly-eye lens, having a size equal to or smaller than that of the lens unit 221 is disposed between the light source and the lens unit 221 of the intermediate region. The distance between the angle-enlarging element and the lens unit 221 is smaller than the distance between the angle-enlarging element and the light source, for example, the distance between the angle-enlarging element and the lens unit 221 is less than half of the distance between the angle-enlarging element and the light source, and preferably, the angle-enlarging element is disposed adjacent to the light-incident side of the lens unit 221, so that the incident of the rear light beam diverged by the angle-enlarging element on the adjacent lens unit can be avoided, and the interference of the light beam emitted by the light source divided by the lens array 220 can be reduced. The light passing through the angle enlarging element is diffused by the angle enlarging element, so that a larger light spot is formed after being reflected by the mirror array 140. It is understood that the angle enlarging element is not limited to be disposed between the light source and the lens unit 221 in the middle region, and may also be disposed between the light source and other lens units, and the number of the angle enlarging element may also be multiple, and the number of the angle enlarging element corresponds to the number of the lens units, so that the multiple sub-beams form a spot with a larger size after being reflected by the mirror array 140.

The third embodiment is as follows:

fig. 3 is a schematic structural diagram of a lighting fixture 300 according to a third embodiment of the present invention. In fig. 3, the same components as those in fig. 1 are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in fig. 3, the lighting fixture 300 includes a light source, a lens array 120, a collimating optic 130, a mirror array 140, and an aperture 160. The lighting fixture 300 is different from the lighting fixture 100 provided in the first embodiment in that the lighting fixture 300 further includes a diaphragm 160 disposed between the lens array 120 and the collimating optical element 130, the diaphragm 160 is located on the focal plane of the collimating optical element 130, and the diaphragm 160 includes a plurality of through holes respectively corresponding to the convergence points of the plurality of sub-beams. In this embodiment, by providing the diaphragm 160 on the focal plane of the collimating optical element 130, each sub-beam is converged and then passes through the through hole of the diaphragm 160, so that stray light generated by reflection on the surface of the lens unit of the lens array 120 and formed by penetrating through the joint of the lens unit or caused by other optical devices can be shielded, thereby reducing the influence of the stray light on the light spots projected by the lighting fixture 300 and improving the contrast of the light spot array.

The shape of the through hole of the diaphragm 160 may be circular, oval, pentagram, cross-star, heart, triangle, square, regular hexagon, snowflake or other shapes, so that the light spot projected by the lighting fixture 300 forms a corresponding shape. The shape of the through hole of the diaphragm 160 may be determined according to a specific decoration effect, and one or more than two shapes may be selected and combined, which is not limited herein.

The fourth embodiment:

fig. 4 is a schematic structural diagram of a lighting fixture 400 according to a fourth embodiment of the present invention. In fig. 4, the same components as those in fig. 3 are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in fig. 4, the light fixture 400 includes a light source, a lens array 120, a collimating optic 130, a mirror array 140, an aperture 160, and a polygon 170. The lighting fixture 400 is different from the lighting fixture 300 provided in the third embodiment in that the lighting fixture 400 further includes a polygon mirror 170 located between the diaphragm 160 and the collimating optical element 130, the polygon mirror 170 includes at least two prism units, the incident planes or the emergent planes of the at least two prism units have different inclination angles, at least one sub-beam is incident on the at least two prism units, and each prism unit is used for refracting light rays to different directions. For example, in fig. 4, the prism 170 includes a first prism unit located at the upper side and a second prism unit located at the lower side, the light emitting surface of the first prism unit is inclined downward along the direction of the optical axis, the light emitting surface of the second prism unit is inclined upward along the direction of the optical axis, the upper half of the sub-beams passing through the middle area of the lens array 120 are incident on the first prism unit, the lower half of the sub-beams are incident on the second prism unit, the two sub-beams are respectively refracted to different directions, and after being collimated by the collimating optical element 130 and reflected by the mirror array 140, different small spot arrays are respectively formed. In this embodiment, the polygon mirror 170 is disposed between the diaphragm 160 and the collimating optical element 130, so as to refract different parts of at least one sub-beam to different directions, and further split the sub-beam, thereby increasing the number of light spots projected by the lighting fixture 400.

The fifth embodiment:

fig. 5 is a schematic structural diagram of a lighting fixture 500 according to a fifth embodiment of the present invention. In fig. 5, the same components as those in fig. 3 are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in fig. 5, the light fixture 500 includes a light source, a lens array 120, a collimating optic 130, a mirror array 140, an aperture 160, and a color filter 180. The lighting fixture 500 is different from the lighting fixture 300 provided in the third embodiment in that the lighting fixture 500 further includes a color filter 180 located between the diaphragm 160 and the collimating optical element 130, and the color filter 180 covers the optical path of at least one sub-beam. The color filter 180 is capable of transmitting light of a certain color while filtering light of other colors. For example, the color filter 180 is a red filter covering the optical path of a sub-beam, the sub-beam passes through the red filter and becomes red light, the sub-beam of the red light forms a red spot after being collimated by the collimating optical element 130 and reflected by the mirror array 140, and the other sub-beams that do not pass through the color filter 180 still form a white spot, so that the lighting fixture 500 finally projects the red and white spots. The type and number of the color filters 180 may be determined according to a specific decoration effect, and are not particularly limited herein. In this embodiment, the color filter 180 is disposed between the diaphragm 160 and the collimating optical element 130 to filter part of the sub-beams into different colors, so that the lighting fixture 500 projects an array of light spots with different color distributions, thereby improving the diversity of the decorative effect.

Embodiment six:

fig. 6 is a schematic structural diagram of a lighting fixture 600 according to a sixth embodiment of the present invention. In fig. 6, the same components as those in fig. 3 are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in fig. 6, a light fixture 600 includes a light source, a lens array 120, collimating optics 130, a mirror array 140, an aperture 160, and a reflector. The lighting fixture 600 differs from the lighting fixture 300 according to the third embodiment in that the lighting fixture 600 further includes a light reflecting device located between the diaphragm 160 and the collimating optical element 130, and the light reflecting device includes at least two reflective mirrors, and the at least two reflective mirrors are disposed around the plurality of sub-beams passing through the diaphragm 160 and are used for collecting and reflecting part of the light rays of the part of the sub-beams to the collimating optical element 130. In fig. 6, it is shown that the light reflecting device includes a reflective mirror 191 and a reflective mirror 192, of the plurality of sub-beams passing through the diaphragm 160, a part of the light rays of the sub-beam located at the upper position is reflected by the reflective mirror 191 and then guided to the collimating optical element 130, and a part of the light rays of the sub-beam located at the lower position is reflected by the reflective mirror 192 and then guided to the collimating optical element 130, according to the principle that the optical path is reversible, the two light rays reflected by the reflective mirror 191 and the reflective mirror 192 to the collimating optical element 130 are equivalent to those emitted by the virtual light emitting points S4 and S5, and by properly setting the position of the collimating optical element 130, the virtual light emitting points S4 and S5 are located on the focal plane of the collimating optical element 130, so that the two light rays form a collimated light beam after passing through the collimating optical element 130, and then are reflected by the reflective mirror array 140 to form a small spot array. In this embodiment, a light reflecting device is disposed between the diaphragm 160 and the collimating optical element 130, so that part of the light rays of the partial sub-beams are reflected by the light reflecting device and then guided to the collimating optical element 130, and the other part of the light rays directly irradiate the collimating optical element 130, because the two part of the light rays have different angles of incidence to the collimating optical element 130, the two part of the light rays respectively form two collimated light beams after passing through the collimating optical element 130, and are reflected by the reflector array 140 to form two small spot arrays, thereby increasing the number of the spots projected by the lighting fixture 600.

Embodiment seven:

fig. 7 is a schematic structural diagram of a lighting fixture 700 according to a seventh embodiment of the present invention. In fig. 7, the same components as those in fig. 6 are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in fig. 7, the lighting fixture 700 includes a light source, a lens array 120, collimating optics 130, a mirror array 140, a diaphragm 160, a reflector, and a convex lens 193. The lighting fixture 700 differs from the lighting fixture 600 provided in the sixth embodiment in that the lighting fixture 700 further includes a convex lens 193 located between the diaphragm 160 and the collimating optical element 130.

In the lighting fixture 600 according to the sixth embodiment, a part of the light beams of the sub-light beams is reflected by the light reflecting device and guided to the collimating optical element 130, the optical path of the part of the light beams is larger than the optical path of the light beam directly incident on the collimating optical element 130, and the virtual light emitting points S4, S5 are located between the focal plane of the collimating optical element 130 and the lens array 130, so that when the virtual light emitting points S4, S5 are located at the focal plane of the collimating optical element 130, the convergence points S1, S2, S3 of each sub-light beam are located between the focal plane of the collimating optical element 130 and the collimating optical element 130, and by setting, the distance between the convergence point of each sub-light beam and the focal plane of the collimating optical element 130 is less than or equal to 10% of the focal length of the collimating optical element 130, and a convex lens is provided between the diaphragm 160 and the collimating optical element 130, so that the convex lens collects and refracts the light beams that are not reflected by the light reflecting device 193, and then projected to the collimating optical element 130, and the equivalent virtual light emitting point of the light collected and refracted by the convex lens 193 is located on the side of the focal plane of the collimating optical element 130 away from the collimating optical element 130 according to the principle that the optical path is reversible. Through reasonable design, the virtual light-emitting points S4 and S5 of the light reflected by the light-reflecting device and the equivalent virtual light-emitting point of the light collected and refracted by the convex lens 193 have the same optical path and are all located on the focal plane of the collimating optical element 130, so that all the light rays can obtain ideal collimation degree through the collimating optical element 130, and the size and the brightness of the light spot projected by the lighting fixture 600 are ensured.

The above embodiments are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A lighting fixture, comprising:

a light source;

a lens array including a plurality of lens units for dividing light emitted from the light source into a plurality of sub-beams and condensing the plurality of sub-beams, respectively;

a collimating optical element, wherein the distance between the convergence point of the plurality of sub-beams and the focal plane of the collimating optical element is less than or equal to 10% of the focal length of the collimating optical element, and the collimating optical element is used for collimating the plurality of sub-beams;

and the reflector array is used for receiving the collimated sub-beams to reflect and form a light spot array.

2. The light fixture of claim 1 wherein the light source emits light having a divergence angle less than or equal to 60 degrees.

3. The light fixture of claim 1 wherein at least one lens unit has a size that is different from the size of the other lens units.

4. The light fixture of claim 3 wherein at least one lens unit has a focal length that is different from the focal lengths of the other lens units, the plurality of lens units being in a non-common plane.

5. The light fixture of claim 4 wherein the lens array comprises a middle region and a peripheral region, the lens units in the middle region having a size and a focal length that are greater than the size and the focal length of the lens units in the peripheral region, and the lens units in the middle region having a distance from the focal plane that is greater than the distance from the focal plane of the lens units in the peripheral region.

6. A lighting fixture as recited in claim 1, further comprising a diaphragm located at said focal plane, said diaphragm comprising a plurality of through-holes respectively corresponding to convergence points of said plurality of sub-beams.

7. A lighting fixture as recited in claim 6, further comprising a polygon prism disposed between said aperture and said collimating optics, said polygon prism comprising at least two prism units, said at least two prism units having entrance or exit surfaces with different tilt angles, at least one of said sub-beams being incident on at least two of said prism units.

8. The light fixture of claim 6 further comprising a color filter between the aperture and the collimating optics, the color filter covering the optical path of at least one of the sub-beams.

9. A light fixture as recited in claim 6, further comprising light reflecting means located between said aperture and said collimating optics, said light reflecting means being configured to collect and reflect a portion of said sub-beams of light to said collimating optics.

10. A light fixture as recited in claim 9, further comprising a convex lens between the stop and the collimating optics, the convex lens being configured to collect light that is not reflected by the reflector.

11. A lighting fixture as recited in claim 5, wherein an angle-enlarging element is disposed between said light source and at least one of said lens units.

12. The lighting fixture of claim 1, wherein the light source comprises at least two sub-light sources and a light combining device, the at least two sub-light sources are respectively located at different sides of the light combining device, and the light combining device is configured to combine lights emitted from the plurality of sub-light sources into a bundle.

13. The lighting fixture of claim 1, wherein the light source comprises a plurality of sub-light sources, the plurality of sub-light sources are arranged in an array, and each sub-light source corresponds to one lens unit.

14. A lighting fixture as recited in any one of claims 1-13, further comprising a drive device, said drive device being configured to rotate said lens array.