CN216667547U

CN216667547U - Interference lens and projection atmosphere lamp

Info

Publication number: CN216667547U
Application number: CN202220141441.3U
Authority: CN
Inventors: 刘可贤; 黄勇; 王刚
Original assignee: Zhongshan Bolang Electronic Technology Co ltd
Current assignee: Zhongshan Bolang Electronic Technology Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-06-03
Anticipated expiration: 2032-01-19

Abstract

The application provides an interference lens and a projection atmosphere lamp. An interference lens comprising: the interference sheet comprises a first surface and a second surface which are opposite, and the first surface is a rough surface; the reflective film is arranged on the interference sheet; light rays are emitted into the interference sheet through the rough surface, reflected by the reflecting film and then emitted from the rough surface to form an interference pattern. The projection atmosphere lamp comprises the interference lens, the light source and the focusing lens, wherein after light emitted by the light source passes through the interference lens, an interference pattern reflected by a reflecting film in the interference lens is focused by the focusing lens and then projected on a medium. This application has realized the simplification of structure through set up the reflective membrane on interfering the piece, compares prior art and need not to set up solitary reflector and refraction lens, and consequently the utilization ratio of light energy is higher, and power consumption is less, and manufacturing cost is lower, and the projection effect is more excellent.

Description

Interference lens and projection atmosphere lamp

Technical Field

The application relates to the technical field of projection lamps, in particular to an interference lens and a projection atmosphere lamp.

Background

The projection atmosphere lamp is a lamp capable of projecting patterns on walls, floors and curtains. The atmosphere lamp is usually applied to stage entertainment scenes such as theaters, studios, bars, discos and the like, and can project monochromatic or multicolor patterns of water waves, starry sky or various lines, so that a warm and romantic immersive scene is created. With the continuous progress and development of society, the living standard of people is continuously improved, and the atmosphere lamp gradually enters every family.

Prior art atmosphere lamps typically utilize a light source to project a pattern through a decorative cover printed with the pattern. In order to overcome the problem of monotonous projection style, one or more water vein sheets capable of rotating relative to a light source are sometimes arranged in the atmosphere lamp, so that light is transmitted to a focusing mirror and then projected and imaged, and various effects such as starry river circulation, water wave rippling and the like are realized. Atmosphere lamp also can utilize interference piece and reflector to reflect sometimes, projects behind the focusing lens after the reflection and the projection formation of image. The light beam is refracted for a plurality of times, reflected and refracted again by the interference sheet and the reflector, then is amplified by the lens, and is driven to rotate by the motor, and finally, a soft and layered dynamic starry sky effect is presented.

In the schemes, the dynamic projection effect is realized by using the optical lens and the motor, however, the internal structure of the atmosphere lamp is complex, the loss of a light source is increased by the light beam after multiple refraction and reflection, and the imaging is dark or the light leakage of the shell is possibly caused, so that the use experience of a user is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve or at least partially solve the above technical problem, according to an aspect, the present application provides an interference lens suitable for a projection atmosphere lamp, comprising: the interference sheet comprises a first surface and a second surface which are opposite, wherein the first surface is a rough surface; the reflective film is arranged on the interference sheet; and light rays are emitted into the interference sheet through the rough surface, reflected by the reflective film and then emitted from the rough surface to form an interference pattern.

According to another aspect, the present application further provides a projection atmosphere lamp, which includes any one of the interference lenses, a light source and a focusing lens, wherein after light emitted from the light source passes through the interference lens, an interference pattern reflected by a reflective film in the interference lens is focused by the focusing lens and then projected on a medium.

Compared with the prior art, the atmosphere lamp of the application does not need to be provided with an independent reflector and an independent refraction lens, is more reasonable in layout and more compact in structure, and is favorable for saving materials and reducing cost. In addition, the light source can be prevented from light energy loss caused by multiple refraction and reflection, the light utilization rate is greatly improved, projected patterns are clearer, the light emitting efficiency and the projection effect are better, the energy consumption is saved, and the imaging quality is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application, reference will now be made briefly to the accompanying drawings. It is to be understood that the drawings in the following description are only intended to illustrate some embodiments of the present application, and that a person skilled in the art may also derive from these drawings many other technical features and connections etc. not mentioned herein.

Fig. 1 is a schematic structural diagram of a projection atmosphere lamp according to an embodiment of the present disclosure.

Fig. 2 is an enlarged view of a portion of fig. 1 of the present application at a.

Fig. 3 is a schematic structural diagram of a light source of a projection atmosphere lamp according to another embodiment of the present application.

Fig. 4 is an exploded schematic view of a projection atmosphere lamp according to yet another embodiment of the present application.

Reference numerals:

1. an interference lens; 11. an interference sheet; 12. a first surface/matte; 13. a second surface/flat; 14. a light-reflecting film; 15. a keyhole; 2. a light source; 3. a focusing lens; 4. a motor; 5. a transmission member; 51. a rotating shaft; 52. a key.

Detailed Description

The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application.

The inventor of the application finds that in the existing atmosphere lamp, the refraction lens is utilized to realize irregular refraction on the light path. However, the internal structure of these atmosphere lamps is complicated, and the light beam is refracted and reflected many times, so that the light source is lost, which may cause dark imaging or light leakage from the outer shell, and affect the user experience.

In view of this, the present application provides an interference lens and a projection atmosphere lamp, so as to simplify the structure, improve the utilization rate of the light source, and reduce the manufacturing cost and energy consumption.

Implementation mode one

The first embodiment of the present application proposes an interference lens 1, which is suitable for a projection atmosphere lamp, and as shown in fig. 1 and fig. 2, the interference lens 1 includes:

an interference sheet 11, which comprises a first surface 12 and a second surface 13 which are opposite, wherein the first surface 12 is a rough surface 12;

a reflective film 14 provided on the interference sheet 11;

wherein, the light enters the interference sheet 11 through the rough surface 12, is reflected by the reflective film 14 and then exits from the rough surface 12 to form an interference pattern.

As is clear to those skilled in the art, in physics, Interference (Interference) is a phenomenon in which two or more rows of waves overlap or cancel each other when they meet in space to form a new waveform. For example, when a beam splitter is used to split a monochromatic light beam into two beams, and then the beams are overlapped in a certain region of the space, it is found that the light intensity in the overlapped region is not uniformly distributed: the brightness varies with the position in space, the brightest place exceeds the sum of the two original light intensities, and the darkest place has zero light intensity, and the light intensity is distributed again as interference fringe.

The interference sheet 11 may be a transparent water-wave sheet, or a light-transmitting and refracting sheet structure with a water-wave pattern disc, and the material thereof may be glass, resin, PC, etc., and the specific choice does not limit the present application. Since the interference piece 11 has the rough surface 12, the optical path difference of the refracted light is different, and coherent light beams emitted from the rough surface 12 are superimposed on each other to form interference fringes of alternating light and dark.

The interference lens can be applicable to projection atmosphere lamp, and prior art's interference lens sets up usually between lamp shade and light source, and the light beam is earlier through interference piece formation interference fringe, and the back enlargies through the lamp shade, and space utilization is lower. Or, one side of interference piece is provided with lamp shade and light source, and the opposite side is provided with the reflector, and the light beam is refraction to the reflector through the air between interference piece, interference piece and the speculum earlier, then reflects to the interference piece through the reflector, forms the interference fringe through the interference piece again, enlargies through the lamp shade at last, and the structure is comparatively complicated, and there is the loss in multiple reflection, refraction in light.

In view of this, in one embodiment of the present application, the second surface 13 of the interference sheet 11 is a flat surface 13, and the light reflecting film 14 is disposed on the flat surface; optionally, a reflective film 14 is plated on the planar surface 13 of the interference patch 11. Thus, light enters the interference piece 11 through the rough surface 12, is reflected by the reflective film 14 at the second surface 13 of the interference piece 11, and then exits from the rough surface 12 to project an interference pattern. When the light beam irradiates the interference sheet 11, a part of the light beam is directly reflected by the rough surface 12 of the interference sheet 11, and another part of the light beam is refracted by the interference sheet 11, reflected by the reflective film 14 and then emitted from the rough surface 12, so as to project an interference pattern.

In another embodiment, the retroreflective film 14 is disposed inside the interference patch 11, i.e., the material of the interference patch 11 surrounds the retroreflective film 14, or the retroreflective film 14 is disposed between the first surface 12 and the second surface 13 of the interference patch 11. Thus, light enters the interference piece 11 through the rough surface 12, is reflected by the reflective film 14 inside the interference piece 11, and then exits from the rough surface 12 to project an interference pattern. In this case, the second surface 13 of the interference piece 11 may be a flat surface or a rough surface. When the second surface 13 of the interference plate 11 is rough, light can also enter the interference plate 11 through the second surface 13, and the light is reflected by the reflective film 14 inside the interference plate 11 and then exits from the second surface 13 to project an interference pattern.

Compared with the prior art, the structure of the whole projection atmosphere lamp can be simplified by adopting the interference sheet 11 provided with the reflective film 14, so that the layout is more reasonable, the structure is more compact, materials are saved, and the cost is reduced. In addition, compared with the arrangement of a reflector, the reflective film 14 is directly plated on the interference sheet 11, so that on one hand, the light can be prevented from being refracted by air between the interference sheet 11 and the emitting surface, the utilization rate of light energy is improved, the energy loss is reduced, and the imaging is prevented from being darker; on the other hand, the refractive indexes of air and the lens are different, the number of times of refraction is reduced, image distortion caused by multiple reflection and refraction can be avoided, and the imaging effect is guaranteed, so that the interference lens 1 can be better suitable for the application scene of a projection atmosphere lamp.

It is worth mentioning that the rough surface 12 may have a plurality of protrusions and grooves, wherein the distance D between the top of the highest protrusion and the bottom of the deepest groove accounts for 15% to 30% of the thickness D of the interference piece 11. In the case where the first surface 12 of the interference piece is a rough surface having a plurality of projections and recesses, "the thickness D of the interference piece 11" means an equivalent thickness of the interference piece 11 at an equivalent volume assuming that the first surface 12 is a flat surface. The plurality of protrusions and the plurality of grooves can increase the optical path difference of refracted light. The value range of D can be between 15% D and 30% D, the light and shade alternation of interference fringes in the interval is more obvious, and the incident light at the same angle can present different refracted light after passing through the interference sheet 11, so that the projected interference pattern has a better effect.

Second embodiment

The second embodiment of the present application provides a projection atmosphere lamp, which includes the above-mentioned interference lens 1, light source 2 and focusing lens 3, wherein after the light emitted from the light source 2 passes through the interference lens 1, the interference pattern reflected by the reflective film 14 in the interference lens 1 is focused by the focusing lens 3 and then projected on the medium.

Referring to fig. 1 and 2, when the light beam emitted from the light source 2 irradiates the interference sheet 11, a portion of the light beam is directly reflected by the rough surface 12 of the interference sheet 11, and another portion of the light beam is refracted by the interference sheet 11, reflected by the reflective film 14, and then emitted from the rough surface 12, so as to project an interference pattern. The interference pattern is focused by the focusing lens 3 and then projected on the medium.

The light source 2 of the present embodiment may be a monochromatic light source, or may be an RGB light source, i.e., a multicolor light source. The focusing lens may be a cylindrical gradient index lens having end focusing and imaging characteristics, or a lens group consisting of a plurality of lenses. The projected target medium can be a ceiling, a wall surface, a ground surface, and various other media such as water, a curtain and the like.

As described above, compared with the prior art, the structure of the whole projection atmosphere lamp can be simplified, so that the layout is more reasonable, the structure is more compact, the material is saved, and the cost is reduced. In addition, compared with the arrangement of a reflector, the method for directly plating the reflective film 14 on the interference sheet 11 can avoid air refraction between the interference sheet 11 and the emitting surface, improve the utilization rate of light energy, reduce energy loss and prevent dark imaging; on the other hand, the refractive indexes of air and the lens are different, the number of times of refraction is reduced, image distortion caused by multiple reflection and refraction can be avoided, and the imaging effect is guaranteed.

Compared with the prior art that the distance between the reflector and the interference wheel needs to be strictly controlled, the projection atmosphere lamp has the advantages that the reflector does not need to be arranged, irregular reflection is achieved through distance control, the structure of the whole projection atmosphere lamp is simple, the assembly manufacturing process can be reduced, and the cost is reduced. In addition, compared with multiple reflection and refraction in the prior art, the reflection and refraction times are reduced, the power consumption can be reduced by about 30% under the same illumination, the optical loss can be reduced to be within 10% from 40% in the prior art, and the energy-saving and environment-friendly effects are achieved. After light emitted by the light source 2 passes through the interference lens 1, interference patterns can be directly reflected, and the light is focused by the focusing lens 3 and then projected on a medium, so that the utilization rate of light energy is improved, and monochromatic or polychromatic light with almost the original light source light effect can be projected.

Referring to fig. 1 and 3, the divergence angle α of the light source 2 may be in a range of 45 ° to 70 °, and the first angle β formed by the central axis of the light exit region of the light source 2 and the interference lens 1 may be in a range of 20 ° to 70 °. Through the reasonable divergence angle alpha, the light source 2 and the interference piece 11 position that set up the light source 2, can control the interference pattern and through the homogeneity of size and distribution of focus back projection on the medium, improve the projection effect.

In one embodiment, the first angle β between the central axis of the light exit area of the light source 2 and the interference lens 1 is in the range of 40 ° to 50 °. The first angle beta is in the range of 40-50 degrees, so that the projection atmosphere lamp has a compact overall structure and better light extraction efficiency.

Preferably, the second angle γ formed by the focal plane F-F of the focusing lens 3 and the interference sheet 11 is complementary to the first angle β formed by the central axis of the light-emitting area of the light source 2 and the interference lens 1. The small-scale production test shows that when the second angle gamma and the first angle beta are complementary angles, the area utilization rate of the interference lens 1 is higher, the utilization rate of light energy can be improved by more than 30%, and the light loss can be effectively reduced.

Third embodiment

In order to bring an immersive experience to the user, the inventor of the present application performs an optimization design in the above embodiments to further improve the projection effect of the projection atmosphere lamp. Specifically, referring to fig. 1 and 4, the light emitted by the light source 2 may cover a partial area of the interference lens 1.

The projection atmosphere lamp can further comprise a motor 4 and a transmission piece 5 connected with the motor 4, and the interference lens 1 is arranged on the transmission piece 5 and can be driven by the transmission piece 5 to rotate.

This embodiment can drive interference lens 1 through the cooperation of motor 4 and driving medium 5 and rotate to realize various effects such as river circulation, water wave rippling, avoid the dull problem of projection pattern. In addition, compared with the case that the light emitted by the light source 2 can cover the whole area of the interference lens 1, the light emitted by the light source 2 in the present embodiment covers a part of the area of the interference lens 1, so that the projection on the medium has more changes when the interference lens 1 rotates, and the rotation of the projection is more vivid.

It is worth mentioning that the interference lens in the prior art is often provided with a through hole, and the transmission member is fixed in the through hole of the interference lens through a screw. This creates a shield, and the transmission shields the light passing through the interference lens, so that there is a dark area for the image. In view of this, referring to fig. 4, the interference lens 1 of the present embodiment may be provided with a key hole 15, the transmission member 5 may include a rotation shaft 51, the rotation shaft 51 is connected with the motor 4 to rotate on its own axis, an end of the rotation shaft 51 is provided with a key 52, and the key 52 and the key hole 15 are non-rotatably connected, that is, the key 52 cannot rotate relative to the key hole 15. In one embodiment, the keyhole 15 is provided in the center of the interference lens 1, or at the center of gravity of the interference lens 1, so that the rotation shaft 51 of the transmission 5 can support the interference lens 1 well, maintaining the balance of the interference lens 1 so that it is not easily deflected.

The transmission piece 5 and the interference lens 1 are connected through the key 52 and the key hole 15, so that an additional process is not needed, meanwhile, dark areas can be avoided, and the projection effect of the projection atmosphere lamp is improved. The key 52 may be connected to the keyhole 15 by means of screw fixation, snap connection, glue bonding, etc., and the specific choice of the key 52 may be a spline or a flat key. In one embodiment, the key 52 has a D-shaped cross-section or has two outer sides that are parallel to each other, while the keyhole 15 also has a D-shaped cross-section or two inner sides that are parallel to each other, respectively.

In the present embodiment, the key hole 15 may be a through hole as shown in fig. 4, or may be a blind hole, and the key hole 15 may be opened on the second surface 13 of the interference sheet 11. In one embodiment, when the key hole 15 is a blind hole, both the sidewall and the bottom wall of the key hole 15 may be plated with the reflective film 14. The reflective film 14 can eliminate dark field caused by the lack of the reflected light in the key hole 15 area, thereby improving the projection effect of the projection atmosphere lamp.

In practical use, a part of light beams emitted by the light source 2 is directly reflected by the rough surface 12 of the interference lens 1, the other part of the light beams is refracted by the interference lens 1, most of the refracted light beams are reflected by the reflective film 14 arranged on the flat surface 13 of the interference sheet 11 and then emitted from the rough surface 12, and the small part of the refracted light beams are reflected by the reflective film 14 arranged on the surface of the keyhole 15 and then emitted from the rough surface 12. During the reflection and refraction processes, countless light rays with different angles can be formed, interference patterns are formed by mutual superposition, and the interference patterns are focused by the focusing lens 3 and then projected on a medium. In the embodiment, the interference lens 1 can be driven to rotate by the motor 4 and the transmission part 5, so that various effects such as river circulation, water wave rippling and the like are realized, and the projection effect is improved.

Compared with the prior art, the structure of the whole projection atmosphere lamp can be simplified, the layout is more reasonable, the structure is more compact, materials are saved, and the cost is reduced. In addition, compared with the arrangement of a reflector, the reflective film 14 is directly plated on the interference sheet 11, so that on one hand, air refraction between the interference sheet 11 and the emitting surface can be avoided, the utilization rate of light energy is improved, the energy loss is reduced, and the imaging is prevented from being darker; on the other hand, the refractive index of air and lens is different, reduces the number of times of refraction and can avoid the image distortion that multiple reflection, refraction brought, guarantees the imaging effect, improves user and uses experience.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. An interference lens suitable for use in a projection atmosphere lamp, comprising:

the interference sheet comprises a first surface and a second surface which are opposite, wherein the first surface is a rough surface;

the reflective film is arranged on the interference sheet;

and light rays are emitted into the interference sheet through the rough surface, reflected by the reflective film and then emitted from the rough surface to form an interference pattern.

2. The interference lens of claim 1 wherein the roughened surface has a plurality of protrusions and grooves, wherein the distance between the top of the highest protrusion and the bottom of the deepest groove is 15% to 30% of the thickness of the interference sheet.

3. The interference lens of claim 1 wherein the second surface is a flat surface and the light-reflecting film is disposed on the flat surface.

4. A projection atmosphere lamp, comprising:

the interference lens of any one of claims 1 to 3;

a light source; and

a focusing lens;

after the light emitted by the light source passes through the interference lens, an interference pattern reflected by a reflecting film in the interference lens is focused by the focusing lens and then projected on a medium.

5. The projection atmosphere lamp of claim 4, wherein the divergence angle of the light source is between 45 ° and 70 °, and the first angle between the central axis of the light exit region of the light source and the interference patch is between 20 ° and 70 °.

6. The projection atmosphere lamp of claim 5, wherein the second angle that the focal plane of the focusing lens makes with the interference patch is a complementary angle to the first angle.

7. The projection atmosphere lamp of claim 4, further comprising a motor and a transmission member connected to the motor, wherein the interference lens is mounted on the transmission member and can be rotated by the transmission member.

8. The projection atmosphere lamp of claim 7, wherein the interference lens is provided with a key hole, the transmission comprises a rotating shaft connected with the motor to rotate along the axis of the rotating shaft, and a key is arranged at the end of the rotating shaft and is non-rotatably connected with the key hole.

9. The projection atmosphere lamp of claim 8, wherein the keyhole is a blind hole, the keyhole opening on the second surface of the interference patch.

10. The projection atmosphere lamp of claim 9, wherein both the sidewalls and the bottom wall of the keyhole are provided with the reflective film.