WO2021238291A1

WO2021238291A1 - Illumination lamp with abundant effects

Info

Publication number: WO2021238291A1
Application number: PCT/CN2021/074036
Authority: WO
Inventors: 蒋伟楷
Original assignee: 广州市浩洋电子股份有限公司
Priority date: 2020-05-28
Filing date: 2021-01-28
Publication date: 2021-12-02
Also published as: CN113739096B; CN113739096A

Abstract

Disclosed is an illumination lamp with abundant and attractive lighting effects for use in a stage lamp. The illumination lamp comprises a case and a lamp holder pivoted to the case, wherein the lamp holder can rotate at least at two latitudes relative to the case; a light source assembly (51) and a prism group are provided inside the lamp holder; the prism group comprises several beam splitter prisms (11, 12, 13, 14); and the beam splitter prisms (11, 12, 13, 14) are located in a light path, the beam splitter prisms (11, 12, 13, 14) are staggered in the direction of the light path, and at least some of the beam splitter prisms (11, 12, 13, 14) can rotate independently or in a linkage manner around respective center lines thereof. The light source assembly (51) is used to generate a light beam, several beam splitter prisms (11, 12, 13, 14) are provided in the direction of the light path and in staggered positions, and the beam splitter prisms (11, 12, 13, 14) are not completely overlapped in the direction of the light path and can be partially staggered or completely staggered. Therefore, under a refraction action of the beam splitter prisms (11, 12, 13, 14) on light, light spots formed by the plurality of beam splitter prisms (11, 12, 13, 14) are overlapped with each other to present various stage lighting effects, and when the beam splitter prisms (11, 12, 13, 14) rotate, the correspondingly generated light spots also rotate, so as to present more abundant and attractive lighting effects.

Description

A lighting fixture with rich effects

Technical field

The present invention relates to the technical field of lighting lamps, and more specifically, to a lighting lamp with rich effects.

Background technique

At present, the rendering effects of stage lights are becoming more and more diversified, and the pattern effects formed in the stage effects are gorgeous. Traditional stage lighting often uses prisms to achieve the effect of multiple patterns appearing at the same time. When the prism is working, place the prism in the main optical axis so that the center line of the prism coincides with the main optical axis of the stage light. The light splitting effect is achieved by switching between different prisms, but even so, only one prism is located in the light path at a certain moment, and multiple prisms cannot work at the same time, and the stage light effect produced is not rich enough. In recent years, there have been prism combinations in which two or more prisms work at the same time. The characteristics of these prism groups are: two or more prisms are located above the light source and the light hole at the same time, along the optical axis of the stage lighting. They are all located in different planes, moved into the optical path alternately or simultaneously moved into the optical path and stacked up and down. This method has played a certain role in the enrichment of stage lighting effects. However, today's market is changing with each passing day. The audience's requirements for stage lighting effects are getting higher and higher. A lamp with richer stage effects will be more popular in the market. Favor.

Summary of the invention

The present invention aims to overcome at least one of the above-mentioned shortcomings of the prior art and provide a lighting fixture with rich effects, which is used to solve the problem of further enriching the stage lighting effects.

The technical solution adopted by the present invention is: comprising a chassis and a lamp cap pivotally connected to the chassis, the lamp cap can be rotated in at least two dimensions relative to the chassis, and a light source assembly and a prism group are arranged in the lamp cap; The light source assembly includes a light source and a light concentrator, the light concentrator gathers the light emitted by the light source to form a light beam, so that most of the light emitted by the light source propagates along the main optical axis; the prism group includes several light splitters The prisms, the dichroic prisms are located in the optical path, the dichroic prisms are staggered in the direction of the light path, and at least part of the dichroic prisms can rotate independently or in conjunction with each other around their respective center lines.

In this technical solution, a light source assembly is used to generate light beams, and at the same time, a number of beam splitting prisms staggered in the light path direction are arranged. The beam splitting prisms do not completely overlap along the light path direction and can be partially or completely staggered. Therefore, the light is refracted by the beam splitting prism. Function, the light spots formed by multiple light splitting prisms are superimposed on each other, which can present a variety of stage lighting effects. At the same time, at least part of the beam splitting prisms in the technical solution can be independently rotated around their respective center lines, and two or more beam splitting prisms can also be linked to rotate. When the beam splitting prism rotates, the corresponding light spot will also rotate, so it can Shows a richer and more colorful lighting effect.

Further, there are at least two different dichroic prisms to produce at least two different refraction effects.

In this technical solution, different light-splitting prisms are arranged in the optical path to obtain different refraction effects. The light-splitting prisms can be tapered prisms or striped prisms, etc., by using prisms with not exactly the same number of prisms, and using different shapes. Prisms, prisms with not exactly the same cone angle and/or not exactly the same divergence angle, etc., you can get the number of spots with different patterns, the spots with different pattern arrangements, and the spots with different overall sizes, etc., superimposed on each other And relatively rotate, thus forming a variety of stage lighting refraction effects.

Preferably, the dichroic prism includes at least one cone prism and one strip prism; or the dichroic prism includes at least two cone prisms with different numbers of edges; or the dichroic prism includes at least two strips with different numbers of edges. Or the light-splitting prism includes at least two cone-shaped prisms with the same number of pyramids with different cone angles; or the light-splitting prism includes at least striped prisms with the same number of pyramids with different divergence angles. Cone prism refers to a dichroic prism with multiple edges extending from one vertex to the bottom surface, and the side surface formed between adjacent ribs is used as a light splitting prism; the cone angle of a cone prism refers to the angle between the side surface and the vertical line of the bottom surface , The cone angle is less than 90°; the strip prism refers to a plurality of mutually parallel edges, the edges are parallel to the bottom surface, the light splitting surface formed between adjacent edges and the light splitting surface formed between the outermost edge and the bottom surface As a beam splitter prism; the divergence angle of a strip prism refers to the angle between two adjacent beam splitters, and the divergence angle is greater than 90° and less than 180°.

In this technical solution, the combination of light splitting prisms is further optimized. When there are at least two light splitting prisms with different shapes in the optical path, the arrangement of the light spots formed by each light splitting prism is different, for example, the light spot formed by the cone prism is circular Arrangement, the light spots formed by the strip prisms are arranged in a straight line; when there are at least two dichroic prisms with different numbers of prisms in the optical path, the number of patterns in the light spots formed by each dichroic prism is different, and the number of dichroic surfaces of the prisms The number of patterns corresponds; when there are at least two cone prisms with different cone angles or two strip prisms with different divergence angles in the optical path, the size of the spot formed by each prism is different, and the cone angle of the cone prism is different. Smaller, the larger the spot size formed; the smaller the divergence angle of the strip prism, the larger the spot size formed. Therefore, in this technical solution, by selecting at least one beam splitting prism that is not exactly the same as other beam splitting prisms, it can be obtained that the refractive effect of at least one beam splitting prism is different from other beam splitting prisms, and very diverse lighting effects can be obtained through different prism combinations.

Preferably, the projections of the dichroic prisms in the optical path direction do not overlap each other.

This technical solution adopts dichroic prisms whose projections on the optical path do not overlap each other. The dichroic prisms are completely staggered. The light spots formed by each dichroic prism are independent of each other, and the generated light spots do not affect each other, which is more beneficial to light The master’s control of the stage lighting effects.

Preferably, the dichroic prisms are all cone-shaped prisms of equal edge length, and the angle difference of the cone angle α between at least two dichroic prisms is greater than zero.

In this technical solution, the beam splitting prisms in the optical path are preferably cone-shaped prisms of equal length, and at least two beam splitting prisms have different cone angles, so at least two sizes of spots are superimposed on each other to form a large spot. The light effect of the inner small spot.

Preferably, the number of the dichroic prisms is at least three, and the taper angles of the dichroic prisms ∝ _i , ∝ _i+1 , ∝ _i+2 and the refractive index n _i ′, n _i+1 ′, n _{i +2} ′ meets the following relationship: tan[α _i -arccos(n _i ′cos α _i )]=2tan[α _i+1 -arccos(n _i+1 ′cos α _i+1 )]-tan[ α _i+2 -arccos(n _i+2 ′cos α _i+2 )], where i is a positive integer and represents the i-th dichroic prism.

The present technical solution forms a plurality of light spot effects that are approximately concentric circles, and the radius difference between adjacent light spots is the same. tan[α _i -arccos(n _i ′cos α _i )] is the projection spot radius of the i-th beam splitting prism at 1 unit distance, when the refractive index of each beam splitting prism is the same, that is, n _i ′=n _{i+ When 1} ′=n _i+2 ′, the larger the cone angle of the dichroic prism, the smaller the spot radius formed. The cone angle of the first dichroic prism is the largest, and the first spot radius formed is the smallest; the cone angle of the second dichroic prism is second, and the second spot radius formed is larger than the first spot radius; The cone angles of the three dichroic prisms are smaller than that of the second dichroic prism, and the formed third spot radius is larger than the second spot radius, and so on. The light spot effect is: the radius difference between the third light spot and the second light spot is equal to the radius difference between the second light spot and the first light spot.

_{Further preferably, the cone angles ∝ 1} , ∝ _{2 of the} first dichroic prism and the second dichroic prism and the refractive index n ₁ ′, n ₂ ′ are in accordance with the following relationship: tan[α _2- arccos(n ₂ ′cos α ₂ )]=2tan[α ₁ -arccos(n ₁ ′cos α ₁ )].

What is formed in this technical solution is the effect of a plurality of equally spaced concentric circles, and the space between any two adjacent concentric circles is equal to the radius of the spot with the smallest radius. When the refractive index of each beam splitting prism is the same, that is, n _i ′=n ₁ ′=n ₂ ′, the cone angle of the first beam splitting prism is the largest, and the first spot radius R ₁ formed is the smallest; the second beam splitting prism The cone angle of the prism is second, and the second spot radius formed by R _{2 is} second. The cone angle of the third dichroic prism is smaller than the cone angle of the second dichroic prism, and the formed third spot radius R _{3 is} larger, and so on, the superimposed light spot effect is a plurality of approximately concentric light spots, and R _i+1 -R _i =R ₃ -R ₂ =R ₂ -R ₁ =R ₁ .

Further, there is a light transmission gap between the dichroic prisms, and the light generated by the light source is projected through the light transmission gap to form a central light spot. Part of the light is refracted by the dichroic prism and then exits. Part of the light does not pass through the dichroic prism, but directly exits through the gap between the prisms to form a central spot. The light passing through the dichroic prism is refracted by the dichroic prism. The resulting central spot is located at the center of the spot generated by each beam splitting prism.

Preferably, the dichroic prism can be moved in and out of the optical path. In this technical solution, a control device is set to move the beam splitting prism in and out, and the beam splitting prism is switched to determine whether to use the beam splitting prism to change the beam effect or adjust the number of beam splitting prisms in the light path to achieve different stage lighting effects.

Further preferably, the dichroic prisms are mounted on the same mounting board and moved in or out of the optical path at the same time. By installing the dichroic prisms on the same mounting board, a group of common control devices can simultaneously control the moving in or out of multiple dichroic prisms in the optical path, thereby improving the switching efficiency.

Further preferably, the material of the mounting plate is a light-transmitting material. The light-transmitting material allows light to pass through the gaps between the dichroic prisms on the mounting board to form a central spot effect.

Preferably, the dichroic prisms rotate together around the central axis of the optical path. By rotating the projected pattern as a whole, the beam splitter prisms can not only rotate around their own centerline, but also rotate around the central axis of the optical path together. As the position of the beam splitter prism changes, it can further create diverse and rich lighting effects.

Preferably, the dichroic prisms have mutually independent movement driving structures, which move in and out of the optical path independently of each other. As another preferred technical solution, each beam splitter prism adopts mutually independent mobile drive structures, and each beam splitter prism is independently controlled to move in and out of the optical path by using their respective drive structures, making the switching control of the prisms more flexible and convenient , The lighting effects are more gorgeous and changeable.

Preferably, the center lines of the dichroic prisms are all parallel to the center axis of the optical path. When the center line of the dichroic prism is parallel to the center axis of the optical path, the deformation of the light spot can be avoided, and the generated light spot is not stretched or compressed.

Preferably, the dichroic prism is located on the same plane perpendicular to the optical path. When the light-incident surface of the light-splitting prism is located on the same plane, the size and definition of each light spot generated can be consistent, and the unclear light spot caused by the height distribution of the light-incident surface of the light-splitting prism can be avoided. When the light incident surface is high and low, the light emitted from the light splitting surface of the prism at a low place may enter the prism at a high place again, which affects the final lighting effect.

Preferably, a pattern disc is arranged between the light source assembly and the prism group, and a light-transmitting pattern is arranged on the pattern disc. Patterns of light spots.

Preferably, a colored layer is provided on the surface of the dichroic prism. A color chip or a color film is attached to the surface of the dichroic prism, and the color of the emitted light can be controlled by changing the color of the color chip, and light spots of different colors can be formed.

Preferably, each light splitting surface of the light splitting prism is respectively provided with a colored layer. A further preferred solution is to set different color plates or plate different color films on each light-splitting surface of the light-splitting prism. Therefore, patterns of different colors can appear in the light spot formed by the same light-splitting prism, which is further enriched. Up the lighting effects.

Preferably, each light splitting surface of the light splitting prism is provided with a pattern. A further preferred solution is to set different patterns on each light-splitting surface of the light-splitting prism, so that the light spot formed on the same light-splitting prism is composed of different patterns, so that the lighting effect is more abundant.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The present invention provides a lighting fixture with rich effects. Through the refraction of light by the beam splitting prism, the light effect of superimposing and rotating light spots formed by multiple beam splitting prisms is realized;

(2) The present invention can further obtain light spots with different numbers of patterns, light spots with different pattern arrangements, light spots with different overall sizes, and various stage lighting effects superimposed on these different light spots;

(3) The present invention can also obtain light spot effects that are independent, independent of each other, and easy to control;

(4) The present invention can obtain the effect of an approximately concentric light spot with the same radius difference between adjacent light spots;

(5) The present invention can further obtain that the radius difference between adjacent light spots is the same, and the radius difference is the same as the radius of the light spot formed by the cone prism with the largest cone angle, thereby forming a superposition of a plurality of approximately concentric light spots. Effect.

Description of the drawings

FIG. 1 is a schematic diagram of the optical path structure of the lighting fixture of Embodiment 1. FIG.

FIG. 2 is a schematic diagram of the refraction of light by the cone prism in Embodiment 1. FIG.

FIG. 3 is a schematic diagram of the light spot effect of Embodiment 1. FIG.

4 is a schematic diagram of the prism group of Embodiment 2.

FIG. 5 is a schematic diagram of the light spot effect of Embodiment 2. FIG.

FIG. 6 is a schematic diagram of the prism group of Embodiment 3. FIG.

FIG. 7 is a schematic diagram of the light spot effect of Embodiment 3. FIG.

The figure contains: the first cone prism-11; the second cone prism-12; the third cone prism-13; the fourth cone prism-14; the first strip prism-21; the second strip prism- 22; third strip prism-23; fourth strip prism-24; first spot-31; second spot-32; third spot-33; fourth spot-34; fifth spot-41; sixth Spot-42; seventh spot-43; eighth spot-44; light source assembly-51; pattern plate-52; condenser lens group-53; light-emitting lens-54; incident angle-61; refraction angle-62.

Detailed ways

The drawings of the present invention are only used for exemplary description, and cannot be understood as a limitation of the present invention. In order to better illustrate the following embodiments, some components in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, some well-known structures in the drawings and their descriptions may be omitted. Understandable.

Example 1

As shown in Fig. 1, this embodiment 1 is an optical path structure of a lighting fixture including four cone-shaped prisms. The lighting fixture also includes a U-shaped support arm. The lamp holder is pivotally connected to the U-shaped support arm. The lamp holder is pivotally connected to the top of the chassis through the U-shaped support arm. The lamp holder can rotate in the first dimension around the U-shaped support arm. The chassis rotates in the second dimension. The lighting fixture of this embodiment 1 includes a light source assembly 51, a pattern plate 52, a condenser lens group 53, a prism group, and a light emitting lens 54 that are sequentially arranged along the optical path. The prism group is arranged between the condenser lens group 53 and the light emitting lens 54. Meanwhile, the condenser lens group 53 and the light-emitting lens 54 are both plano-convex lens groups. The incident surface of the prism group is located on the same surface perpendicular to the optical path. The prism group contains four cones that are staggered in the direction of the optical path and have different ridge numbers. The four cone prisms are respectively the first cone prism 11, the second cone prism 12, the third cone prism 13, and the fourth cone prism 14. Move in and out, and the prism can rotate around the central axis of the optical path together. The four light splitting prisms in the prism group are located on the same plane perpendicular to the light path, and the size and definition of each light spot obtained are the same, and the effect is better. In addition, the light entrance surface and each light exit surface of the beam splitting prism are smooth planes, so the distortion and blurring of the light on the concave or convex surface is avoided, and the light spot obtained after the light passes through the smooth plane is clear and not deformed, and the effect is better.

When light enters another transparent medium obliquely from one transparent medium, when the refractive indexes of the two mediums are different, the propagation direction will generally change, which will cause light refraction.

As shown in Fig. 2, in this embodiment 1, the cone angle α of the cone prism refers to the angle between the vertical line of the side surface and the bottom surface, and the angle β is the angle between the refracted light and the vertical line of the bottom surface. The vertex of the cone angle α points to the target plane. α _i represents the cone angle of the i-th prism, β _i represents the angle between the refracted light of the i-th prism and the vertical line of the bottom surface, n _i ′ represents the refractive index of the material of the i-th prism, and i is a positive integer; n _Empty ' represents the refractive index of air (usually 1). When the light enters the i-th prism and is refracted, the incident angle 61 is (90°-α _i ), and the refraction angle 62 is (90°-α _i +β _i ). According to the law of light refraction, α _i and β _i coincide The following relationship:

n _i ′sin(90°-α _i )=sin(90°-α _i +β _i )

You can get:

β _i ＝α _i -arccos(n _i ′cos α _i )··········①

Wherein, l represents the distance from the stage to the lamp, R _i represents an i-th light through the dichroic prism between the projection spot radius at a distance l, β _{_i,} R _i and l three satisfying the following relationship:

It can be concluded that R _i is:

R _i ＝l tan β _i ····················②

Substituting formula ① into formula ②, we get R _i as:

R _i ＝l tan[α _i -arccos(n _i ′cos α _i )]··········③

When the radii of adjacent spots conform to the following formula, multiple approximate concentric circles with equal spot radius differences can be formed:

R _i+2 -R _i+1 =R _i+1 -R _i ;

which is:

R _i ＝2R _i+1 -R _i+2 ;····················④

Substituting formula ③ into formula ④, the relationship between _{∝ i} , ∝ _i+1 , and ∝ _{i+2 is:}

tan[α _i -arccos(n _i ′cos α _i )]

= 2tan[α _i+1 -arccos(n _i+1 ′cos α _i+1 )]-tan[α _i+2 -arccos(n _i+2 ′cos α _i+2 )]

In the first embodiment, the effect that the distance between any two adjacent concentric circular spots is equal to the radius of the spot with the smallest radius, and conforms to the following relationship:

tan[α ₂ -arccos(n ₂ ′cos α ₂ )]=2tan[α ₁ -arccos(n ₁ ′cos α ₁ )]

In this embodiment 1, the material used for each beam splitting prism is the same, so the refractive index of each beam splitting prism is the same, that is, n′ ₁ =n′ ₂ =n′ ₃ =n′ ₄ , the first cone prism 11 Is a triangular pyramid prism of equal length, the second conical prism 12 is a hexagonal pyramid prism of equal length, the third conical prism 13 is a twelve pyramid prism of equal length, and the fourth conical prism 14 is Eighteen pyramidal prisms of equal length. When the cone angle of the first cone prism 11 is 83.95°, the cone angle of the second cone prism 12 is 78.16°, the cone angle of the third cone prism 13 is 72.86°, and the cone angle of the fourth cone prism 14 is The angle is 68.16°.

The first conical prism 11, the second conical prism 12, the third conical prism 13, and the fourth conical prism 14 are respectively provided with color plates of different colors on each light splitting surface, and each prism can surround its own The center lines of each other rotate independently or in conjunction with each other. The lighting fixture of this embodiment 1 is provided by the light source assembly 51. The reflector changes or converges the light path to a certain extent, and then passes through the pattern plate 52 to make the light path have a specific shape or a specific effect, which initially increases the diversity of light effects. After passing through the condensing lens group 53, the prism group, and the light emitting lens 54 in turn, the light exits. Through the difference of the pattern plate 52 and the moved prism group, it is possible to combine to produce a stage lighting effect with rich colors and brilliant effects.

As shown in FIG. 3, it is a schematic diagram of the light spot effect of the first embodiment. After the dichroic prisms are moved into the optical path through independent driving mechanisms, the light spot generated by the triangular pyramid prism is the first light spot 31 with _{a different color for each pattern, and the radius R 1 is} specifically a pattern of three different colors around a circle The light spot effect of the hexagonal pyramid prism is the second light spot 32 with _{a different color for each pattern, and the radius R 2 is} specifically a light spot effect in which six patterns of different colors are arranged in a circle. , The light spot generated by the twelve pyramid prism is the third light spot 33 with _{a different color for each pattern, with a radius R 3} , specifically a light spot effect in which twelve patterns of different colors are arranged in a circle, eighteen pyramids The light spot generated by the shaped prism is a fourth light spot 34 with _{a different color for each pattern and a radius R 4} , specifically a light spot effect in which 18 patterns of different colors are arranged in a circle. In the first embodiment, the first spot 31, the second spot 32, the third spot 33, and the fourth spot 34 are arranged approximately concentrically in spot circles. The fourth spot 34 is located on the outer circle of the third spot 33, and the third spot 33 is located on the outer circle of the third spot 33. The outer ring of two light spots 32, the second light spot 32 is located in the outer ring of the first light spot 31, and R ₄ -R ₃ =R ₃ -R ₂ =R ₂ -R ₁ =R ₁ , and the light generated by the light source also passes through the beam splitting prism The gap left between forms a central light spot, and the final lighting effect is the superimposition of four groups of light spots arranged in concentric circles and the central light spot. When the four dichroic prisms rotate in the same or opposite directions around their respective center lines, the first spot 31, the second spot 32, the third spot 33, and the fourth spot 34 rotate in the same or opposite directions to produce a variety of colors Bright patterns of light effects.

Example 2

The second embodiment is a lighting fixture including four strip prisms. As shown in FIG. 4, it is a schematic diagram of the prism group of the second embodiment. The difference between the second embodiment and the first embodiment is that the prism group includes four strip prisms that are staggered in the optical path direction and have different numbers of light splitting surfaces, namely the first strip prism 21 and the second strip prism 22. , The third strip prism 23 and the fourth strip prism 24, the first strip prism 21, the second strip prism 22, the third strip prism 23 and the fourth strip prism 24 are installed through a common transparent material mounting plate And the driving mechanism controls the movement of the prism group in and out of the optical path, and the prisms can rotate around the central axis of the optical path together. The first strip prism 21 is a double-sided strip prism, and the second strip prism 22 is a four-sided strip prism. The third strip prism 23 is a six-sided strip prism. The fourth strip prism 24 is an octahedron strip prism. The surfaces of the first strip prism 21, the second strip prism 22, the third strip prism 23 and the fourth strip prism 24 are all pasted with color sheets, and each prism can rotate independently or in conjunction with each other around its own centerline. , Can produce stage lighting effects with rich colors and brilliant effects.

As shown in FIG. 5, it is a schematic diagram of the light spot effect of the second embodiment. After the strip prism is moved into the optical path through a shared transparent mounting plate and a drive mechanism, the light spot generated by the double-sided strip prism is a colored fifth light spot 41, which is specifically arranged in a straight line with two patterns. The light spot effect produced by the tetrahedral strip prism is the colored sixth light spot 42, specifically a light spot effect with four patterns arranged in a straight line, and the light spot produced by the hexahedral strip prism is the colored seventh light spot 43 Specifically, it is a light spot effect in which six patterns are arranged in a straight line. The light spot generated by the octahedral prism is a colored eighth light spot 44, which is specifically a light spot effect in which eight patterns are arranged in a straight line. The linear spot centers of the fifth spot 41, the sixth spot 42, the seventh spot 43, and the eighth spot 44 are approximately coincident with each other. At the same time, there is a gap between the dichroic prisms, and the light generated by the light source passes through the gap to form a central spot. And projected on the target plane, the final lighting effect is the superposition effect of four groups of linearly arranged light spots and the central light spot. When the four strip prisms rotate around their respective center lines in the same or opposite directions, the fifth spot 41, the sixth spot 42, the seventh spot 43, and the eighth spot 44 rotate in the same or opposite directions, resulting in a variety of colors Bright patterns of light effects.

Example 3

The third embodiment is another lighting fixture that includes four beam splitting prisms. As shown in FIG. 6, it is a schematic diagram of the prism group of the third embodiment. The difference between the third embodiment and the first embodiment is that the prism group includes two cone-shaped prisms that are completely offset from each other in the direction of the optical path and the number of ridges are different, and two cone prisms that are completely offset from each other in the direction of the optical path and the number of beam splitting surfaces are different. The bar-shaped prisms are the second conical prism 12, the fourth conical prism 14, the second bar-shaped prism 22, and the fourth bar-shaped prism 24. The second conical prism 12 has a cone angle of 78.16°, etc. The prism-long hexagonal pyramid prism and the fourth pyramid-shaped prism 14 are the isometric-length eighteen pyramid prisms with a cone angle of 68.16°, the second strip-shaped prism 22 is a tetrahedral strip prism, and the fourth strip-shaped prism 24 is an octahedral prism.形prisms. Each strip prism and cone prism are respectively provided with color plates of different colors on each light-splitting surface, and each prism can rotate independently or in conjunction with each other around its own centerline.

As shown in FIG. 7, it is a schematic diagram of the light spot effect of the third embodiment. After the dichroic prisms are moved into the optical path through independent driving mechanisms, the light spot generated by the hexagonal pyramid prism is the second light spot 32 with different colors for each pattern, specifically a pattern of six different colors arranged in a circle Light spot effect. The light spot produced by the eighteenth pyramid prism is the fourth light spot 34 with different colors for each pattern. Specifically, it is a light spot effect in which 18 patterns of different colors are arranged in a circle. The tetrahedral strip prism produces The light spot of is the sixth light spot 42 with different colors for each pattern, specifically a light spot effect in which four patterns are arranged in a straight line. The light spot produced by the octahedral prism is the eighth light spot with different colors for each pattern 44. Specifically, it is a light spot effect in which eight patterns are arranged in a straight line. At the same time, the light generated by the light source also forms a central light spot through the gap left between the beam splitting prisms. Therefore, the light spot effect in this embodiment 3 is two sets of circles. The superimposed effect of two sets of linear light spots and central light spots. When the four dichroic prisms rotate in the same or opposite directions around their respective centerlines, the second spot 32, the fourth spot 34, the sixth spot 42 and the eighth spot 44 rotate in the same or opposite directions to produce a pattern of various colors Brilliant light effect.

Obviously, the above-mentioned embodiments of the present invention are merely examples to clearly illustrate the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the claims of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

A lighting fixture with rich effects, which is characterized in that it includes

A chassis and a lamp cap pivotally connected to the chassis, the lamp cap being rotatable in at least two dimensions relative to the chassis, and a light source assembly and a prism group are arranged in the lamp cap;

The light source assembly includes a light source and a light collector, the light collector gathers the light emitted by the light source to form a light beam, so that most of the light emitted by the light source propagates along the main optical axis;

The prism group includes a plurality of dichroic prisms, the dichroic prisms are located in the optical path, and the dichroic prisms are staggered in the direction of the optical path. At least part of the dichroic prisms can rotate independently or in conjunction with each other around their respective center lines.
The lighting fixture with rich effects according to claim 1, characterized in that there are at least two different dichroic prisms to produce at least two different refraction effects.
The lighting fixture with rich effects according to claim 1, wherein the dichroic prism includes at least one cone prism and one strip prism; or the dichroic prism includes at least two cone prisms with different numbers of ridges; Or the dichroic prism includes at least two strip prisms with different numbers of prisms; or the dichroic prism includes at least two cone prisms with the same number of cones with different cone angles; or the dichroic prism includes at least the same prisms with different divergence angles. Several strip prisms.
The lighting fixture with rich effects according to claim 1, wherein the projections of the dichroic prisms in the optical path direction do not overlap each other.
The lighting fixture with rich effects according to claim 1, wherein the dichroic prisms are all cone-shaped prisms of equal edge length, and the angle difference of the cone angle α between at least two dichroic prisms is greater than zero.
The lighting fixture with rich effects according to claim 5, characterized in that the number of the dichroic prisms is at least three, and the taper angles of the dichroic prisms ∝ i , ∝ i+1 , ∝ i+2 and The refractive indices n i ′, n i+1 ′, and n i+2 ′ meet the following relationship: tan[α i -arccos(n i ′cosα i )]=2 tan[α i+1 -arccos(n i+1 ′cosα i+1 )]-tan[α i+2 -arccos(n i+2 ′cosα i+2 )], where i is a positive integer and represents the i-th spectroscopic prism.
The lighting fixture with rich effects according to claim 6, characterized in that the cone angles of the first dichroic prism and the second dichroic prism ∝ 1 , ∝ 2 and the refractive index n 1 ′, n 2 The relationship between ′ is in accordance with the following relationship: tan[α 2 -arccos(n 2 ′cosα 2 )]=2tan[α 1 -arccos(n 1 ′cosα 1 )].
The lighting fixture with rich effects according to claim 1, characterized in that there is a light transmission gap between the dichroic prisms, and the light generated by the light source is projected through the light transmission gap to form a central spot.
The lighting fixture with rich effects according to claim 1, wherein the dichroic prism can be moved in and out of the light path.
The lighting fixture with rich effects according to claim 9, characterized in that the dichroic prisms are mounted on the same mounting board and move in or out of the light path at the same time.
The lighting fixture with rich effects according to claim 10, wherein the material of the mounting board is a light-transmitting material.
The lighting fixture with rich effects according to claim 1 or 10, wherein the dichroic prisms collectively rotate around the central axis of the optical path.
The lighting fixture with rich effects according to claim 9, characterized in that the beam splitting prisms have mutually independent moving drive structures, which move in and out of the light path independently of each other.
The lighting fixture with rich effects according to claim 1, wherein the center lines of the dichroic prisms are all parallel to the center axis of the light path.
The lighting fixture with rich effects according to claim 1, wherein the dichroic prism is located on the same plane perpendicular to the light path.
The lighting fixture with rich effects according to claim 1, characterized in that a pattern disc is arranged between the light source assembly and the prism group, the pattern disc is provided with a light-transmitting pattern, and the light emitted by the light source passes through the light-transmitting pattern. After the light pattern, the light is split by the dichroic prism.
The lighting fixture with rich effects according to claim 1, wherein the surface of the dichroic prism is provided with a colored layer.
The lighting fixture with rich effects according to claim 1, wherein each light splitting surface of the light splitting prism is respectively provided with a colored layer.
The lighting fixture with rich effects according to claim 1, wherein a pattern is provided on each light splitting surface of the light splitting prism.