CN208222182U - Starry sky projector - Google Patents
Starry sky projector Download PDFInfo
- Publication number
- CN208222182U CN208222182U CN201820456317.XU CN201820456317U CN208222182U CN 208222182 U CN208222182 U CN 208222182U CN 201820456317 U CN201820456317 U CN 201820456317U CN 208222182 U CN208222182 U CN 208222182U
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- CN
- China
- Prior art keywords
- light source
- starry sky
- reflection mirror
- light
- mirror array
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Abstract
The utility model discloses a kind of starry sky projectors, successively include light source, condenser lens, pattern segments, beam splitting unit, collimation lens and reflection mirror array along optical path.Light beam can be divided into the different beamlet of multibeam propagation angle by the beam splitting unit, reflection mirror array is incident on after the different collimated collimateds of beamlet, reflection mirror array includes multiple small reflectors simultaneously, it in this way can be in the case where the small reflector limited amount that reflection mirror array is included, the quantity for increasing projection pattern, expands lighting area.Simultaneously by improving the brightness of LED light-emitting surface using hemispherical reflector using LED as light source, the inadequate disadvantage of LED luminance can solve.
Description
Technical field
The utility model relates to lighting technical fields, and in particular to a kind of starry sky projector.
Background technique
Starry sky projector is a kind of decoration that the patterns such as billions of stars or snowflake are projected out on wall, ceiling, lawn
Lighting device, with such as KTV box, outdoor is as that can play construction atmosphere, decorate landscape on garden, lawn, plant indoors
Effect has very extensive application in life.
Starry sky projector currently on the market is all using laser diode as light source, but laser diode is nearly all
RGB monochrome, it can not be effectively synthesized white, thus be difficult to form the pattern of white.And LED light source is used since brightness is inadequate
The pattern being projected out when starry sky projector is dim, and effect is excessively poor.In addition, existing starry sky projector generally comprises a song
Face reflection mirror array, the reflection mirror array be spliced by multiple small reflectors, and the quantity of small reflector, which determines, to be projected out
The quantity of pattern, the considerations of for volume and cost, the quantity for the small reflector array for including in reflection mirror array at present is also not
It is especially more, thus the number of patterns being projected out is limited, affects projection rendering effect.
Summary of the invention
The utility model provides a kind of starry sky projector, with solve it is existing in the prior art structure is complicated, volume compared with
Big and inconvenient problem with use.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is:
A kind of starry sky projector, along optical path successively include light source, condenser lens, pattern segments, beam splitting unit, collimation lens and
Light beam is divided into the different multiple beamlets of propagation angle by reflection mirror array, the beam splitting unit, and different beamlets are collimated
Reflection mirror array is again incident on after collimated, the reflection mirror array includes multiple small reflectors, the multiple small reflection
Mirror arranges to form a curved-surface reflection side.
Further, the beam splitting unit is made of multiple reflecting mirrors, and the reflecting surface of any two reflecting mirror is non-coplanar.
Further, the reflecting mirror in the beam splitting unit is equipped with 4, arranges in 2 rows 2 column, and two neighboring reflecting mirror
Between angle be greater than 120 degree and less than 180 degree.
Further, the light source is LED light source, is provided with hemispherical reflector on the outside of light source, the hemispherical is reflective
Bowl is equipped with light-transmitting opening, and the LED light source is located at the centre of sphere of hemispherical reflector.
Further, the corresponding centre of sphere angle of the light-transmitting opening is less than 90 degree.
Further, each small reflector in the reflection mirror array is rectangular, and side length is 1-10mm, the reflection
Lens array is pasted on a curved-surface structure and forms curved-surface reflection side.
It further, include multiple patterns in the pattern segments, the corresponding region of pattern is transparent area.
Further, further include the first driving mechanism being connect with the reflection mirror array, drive the reflection mirror array
Rotation.
Further, further include the second driving mechanism being connect with the beam splitting unit, drive the beam splitting unit mobile
Or rotation.
Further, the light source is laser remote excitation phosphor source, including the semiconductor along optical path gap setting
Laser and phosphor sheet, the light source outside are provided with hemispherical reflector, and it is anti-that the phosphor sheet is located at the hemispherical
At the sphere center position of light bowl.
Starry sky projector provided by the utility model successively includes light source, condenser lens, pattern segments, beam splitting list along optical path
Member, collimation lens and reflection mirror array.Light beam can be divided into the different beamlet of multibeam propagation angle by the beam splitting unit,
Reflection mirror array is incident on after the different collimated collimateds of beamlet, while reflection mirror array includes multiple small reflectors,
The quantity of projection pattern can be increased in the case where the small reflector limited amount that reflection mirror array is included in this way, expanded
Big lighting area.It, can simultaneously by improving the brightness of LED light-emitting surface using hemispherical reflector using LED as light source
To solve the inadequate disadvantage of LED luminance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one specific embodiment of the utility model starry sky projector；
Fig. 2 is the structural schematic diagram of one specific embodiment of the utility model beam splitting unit；
Fig. 3 is the structural schematic diagram of the utility model starry sky projector another specific embodiment.
It is as shown in the figure: 10, light source；110, LED chip；120, fluorescent powder；130, semiconductor laser；20, condenser lens；
30, pattern segments；40, beam splitting unit；410, reflecting mirror；50, collimation lens；60, reflection mirror array；610, small reflector；70, half
Spherical reflector；710, light-transmitting opening；810, the first driving mechanism；820, the second driving mechanism.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawing:
Fig. 1 is the structural schematic diagram of the starry sky projector first embodiment of the utility model.As shown in Figure 1, in this implementation
It successively include light source 10, condenser lens 20, pattern segments 30, beam splitting unit 40, collimation lens 50, reflecting mirror battle array along optical path in example
Column 60.In the present embodiment, light source 10 is LED light source, and the LED light source includes LED chip 110 and fluorescent powder 120, LED core
Piece 110 issues blue excitation light, and fluorescent powder 120 is yellow fluorescent powder, and the LED part blue excitation light being emitted is converted Huang by it
The yellow light of light, final unconverted blue light and fluorescent powder outgoing is mixed to form white light, this is a kind of encapsulating structure of white light LEDs,
The utility model is not limited to this, and to those skilled in the art, can find more different packing forms.
In the present embodiment, it is provided with hemispherical reflector 70 on the outside of light source 10, the inner wall of the hemispherical reflector 70 is
Spherical reflective surface, light source 10 are located at the centre of sphere of spherical reflective surface.Light-transmitting opening is equipped in the center of top of hemispherical reflector 70
710, the light-transmitting opening 710 can be open region, be also possible to not plate the region of reflectance coating, as long as the light that light source 10 can be allowed to be emitted
Through.The light being emitted from light source 10, a part are directly emitted from light-transmitting opening 710, and another part projects reflector 70
It then is reflected back toward fluorescent powder on spheric reflection wall, since fluorescent powder 120 has scattering process, the light for being reflected back fluorescent powder will be by
It scatters again, a part in scattering light is emitted from light-transmitting opening 710, and another part projects hemispherical reflector 70 again
It is reflected back on fluorescent powder 120 on spheric reflection wall and again, repeatedly, the light being finally emitted from light source 10 is in addition to being inhaled part
Most of except receipts all to export from light-transmitting opening 710, which improves the brightness of light source 10, solve LED light source luminance shortage
Problem.
In the present embodiment, the corresponding region of light-transmitting opening 710 can be arbitrary shape, such as round, ellipse, rectangle,
It is preferably circular.The diameter for defining light-transmitting opening 710 is the diameter that can completely include the smallest circular in region corresponding to light-transmitting opening,
The diameter of the light-transmitting opening 710 relative to reflector 70 centre of sphere shape in an angle, define the ball that the angle is light-transmitting opening 710
Heart angle.Preferably, the centre of sphere angle of light-transmitting opening 710 is less than 90 degree, and more preferably 60 degree.The light exported from light source 10, first through half
The light-transmitting opening 710 of spherical reflector 70, then line focus lens 20 focus in pattern segments 30.It is right by control light-transmitting opening 710
The centre of sphere angle answered can use the focusing that a lens realize emergent ray, if centre of sphere angle corresponding to light-transmitting opening 710 is too
Greatly, it is possible to multiple condenser lenses be needed just to be able to achieve the focusing of light.
In the present embodiment, condenser lens 20 is preferably biconvex lens, and convex front surface collects the angle and light-transmitting opening 710 of light
Corresponding centre of sphere angle matching, less than 60 degree of the angle (referring to full-shape) of rear convex surface convergence light, utilizes in this way by more preferably 30 degree
One lens can realize the collection and convergence of light, save cost.The present embodiment merely provides an optimal embodiment party
Case utilizes multiple condenser lenses certainly, to make the bigger mode of angle for collecting and converging light, should also be included in practical
Within novel protection scope.
In the present embodiment, it is preferred that the distance between light source 10 and condenser lens 20 L1With the focal length f of condenser lens 20
Between relationship are as follows: f < L1< 2f, the distance between condenser lens 20 and pattern segments 30 L2Between the focal length f of condenser lens 20
Relationship are as follows: L2> 2f, in this way, at the picture of amplification in pattern segments 30 after the light beam line focus lens 20 that light source 10 issues.
In the present embodiment, although light source 10 is illustrated by taking White LED light source as an example, the utility model is not
It is limited to this, to those skilled in the art, light source 10 can be substituted for the LED of the different colours such as red, green completely, thus
The projection pattern of different colours is obtained, this simple replacement should also be included within the protection scope of the utility model.
In the present embodiment, include pattern area and shading region in pattern segments 30, pattern area can allow light to penetrate, pattern area it
It is outside shading region, light can not penetrate.The light being emitted from light source 10, is first focused onto pattern segments 30, then through in pattern segments
Pattern area, form a branch of diverging light and continue back-propagation, with the increase of propagation distance, beam cross section is increasing.Scheming
Beam splitting unit 40 is provided in propagation path after case piece 30, it is preferred that the beam splitting unit 40 is by multiple reflecting mirrors
410 compositions, and any two reflecting mirror 410 is non-coplanar, in this way, by the reflection of beam splitting unit 40, by original light beam point
At the different multiple beamlets of propagation angle, the beam cross section of different beamlets be may be the same or different, due to reflecting mirror
The divergent state of light beam will not be changed, so every beam beamlet is still divergent beams.Beam splitting unit 40 in addition to select reflecting mirror,
Other optical elements, such as prism etc. can also be selected, light beam is divided into several beam propagation angles differences as long as being able to achieve
Light.Preferably, the quantity for the beamlet that beam splitting unit 40 is formed is more than 4 beams or 4 beams.
In the present embodiment, collimation lens 50 is arranged after beam splitting unit 40, multiple after 40 beam splitting of beam splitting unit
The beamlet of diverging, then collimated through collimation lens 50, become multiple collimated light beams.After the corresponding beam splitting of each collimated light beam
Beamlet, and the propagation angle of different collimated light beam is different.Beam splitting unit 40, can be by a big light there are also another effect
The light beam of area of beam is divided into the beamlet of multiple small beam cross sections, since the beam cross section of each beamlet is smaller, thus can be with
Small-bore collimation lens 50 is selected, to reduce the volume of whole system.
Multiple parallel beamlets after the collimated collimation of lens 50, are finally incident on reflection mirror array 60, form nothing
Several projection patterns.In the present embodiment, the reflection mirror array 60 includes multiple small reflectors 610, it is preferred that Mei Ge little
Reflecting mirror 610 is rectangular, and side length is 1-10mm, and the quantity of small reflector 610 is at 50 or more, due to each small reflector
610 all can project the pattern in pattern segments to form a picture, in order to obtain projection image as much as possible, small reflector 610
Quantity is The more the better.The multiple small reflector 610 can be regularly arranged, can also with disordered arrangements, all small reflectors 610
Reflecting surface forms a common reflecting surface, which is preferably curved surface, and the curved surface can be concave surface, is also possible to convex
Face, by the way that by small reflector array arrangement, at curved surface, the pattern that all small reflectors can be made to project away scatter, control is bent
The curvature in face can control the size of pattern dispersion range.It is a kind of Preferable scheme is that, by a large stretch of reflecting mirror, be cut into 4mm
Small reflector array, then paste on a curved surface member, can so form camber reflection lens array.If beam splitting list
Light beam 40 is divided into M beamlet by member, while when each beamlet is incident on reflection mirror array 60, and covers reflection
N number of small reflector unit in lens array 60, can finally be projected out M*N pattern image, and pattern is on the projection surface in this way
It scatter each other, forms the illuminating effect of babysbreath.In this way, the beam splitting by beam splitting unit 40 acts on, it can be in reflecting mirror battle array
In the case where the small reflector limited amount that column 60 are included, greatly increase the quantity of projection pattern.
Fig. 2 is the structural schematic diagram of a specific embodiment of the beam splitting unit 40 of the utility model.In Fig. 2, beam splitting
Unit 40 includes 4 reflecting mirrors 410, is in 2 row, 2 column close-packed arrays, and the angle between two neighboring reflecting mirror 410 is less than 180
Degree, i.e., four reflecting mirrors 410 are not on same plane, it is preferred that the angle between two neighboring reflecting mirror 410 is greater than 120
180 degree is spent and is less than, the direction of such light emergent ray after different reflecting mirrors 410 reflects is different, to form 4
The different beamlet of propagation angle, and beamlet intersects outgoing, can reduce the bore of collimation lens.In certain beam splitting unit 40
The quantity for the reflecting mirror 410 for including, which can according to need, to be configured, herein without limitation.
In the present invention, pattern segments 30 may include one or more patterns, if comprising multiple in pattern segments 30
Pattern can then further increase the quantity of final projection pattern, herein without limitation.
Fig. 3 is the structural schematic diagram of the utility model starry sky projector another specific embodiment, relative to first embodiment,
Light source 10 is replaced with into laser light source, including semiconductor laser 130 and phosphor powder layer 120 in the present embodiment.Laser light source phase
For LED light source, there is energy density more to concentrate the higher advantage of brightness, by way of remote excitation fluorescent powder, can make
The thermal release that the heat that fluorescent powder generates is generated with laser diode, is more advantageous to heat dissipation, so that light-source brightness be made to further increase.
In the case where using a laser as light source, it is anti-hemispherical can also to be not provided with if light-source brightness is sufficiently high, in light-source system
Light bowl 70, to save cost.To those skilled in the art, the excitation light source in the utility model embodiment can also be with
Change LED into, equally by the way of remote excitation fluorescent powder, above various situations should all be included in the protection model of the utility model
Within enclosing.
Starry sky projector described in the utility model further includes the first driving mechanism connecting with the reflection mirror array 60
810, first driving mechanism 810 drives the reflection mirror array 60 to rotate, to change the exit direction of light, to be formed
Dynamic projection effect.It is connected in addition, the second driving mechanism 820 also can be set in the utility model with beam splitting unit 40, passes through control
The movement of beam splitting unit 40 processed, also may be implemented dynamic projection effect.
In conclusion starry sky projector provided by the utility model, successively include along optical path light source 10, condenser lens 20,
Pattern segments 30, beam splitting unit 40, collimation lens 50 and reflection mirror array 60.Light beam can be divided into more by the beam splitting unit 40
The different beamlet of beam propagation angle, the different collimated lens 50 of beamlet are incident on reflection mirror array 60 after collimating, while anti-
Penetrating lens array 60 includes multiple small reflectors 610, in this way can be in the number of small reflector 610 that reflection mirror array 60 is included
It measures in limited situation, increases the quantity of projection pattern, expand lighting area.Simultaneously by using LED as light source 10, benefit
The brightness that LED light-emitting surface is improved with hemispherical reflector 70 can solve the inadequate disadvantage of LED luminance.
Although the embodiments of the present invention is illustrated in specification, these embodiments are intended only as mentioning
Show, should not limit the protection scope of the utility model.Various omissions are carried out in the range of not departing from the utility model aims, are set
It changes and change should be included in the protection scope of the utility model.
Claims (10)
1. starry sky projector, which is characterized in that along optical path successively include light source, condenser lens, pattern segments, beam splitting unit, collimation
Light beam is divided into the different multiple beamlets of propagation angle, different beamlets by lens and reflection mirror array, the beam splitting unit
Reflection mirror array is again incident on after collimated collimated, the reflection mirror array includes multiple small reflectors, the multiple small
Reflecting mirror arranges to form a curved-surface reflection side.
2. starry sky projector according to claim 1, which is characterized in that the beam splitting unit is made of multiple reflecting mirrors,
And the reflecting surface of any two reflecting mirror is non-coplanar.
3. starry sky projector according to claim 2, which is characterized in that the reflecting mirror in the beam splitting unit is equipped with 4,
It arranges and arranges in 2 rows 2, and the angle between two neighboring reflecting mirror is greater than 120 degree and is less than 180 degree.
4. starry sky projector according to claim 1, which is characterized in that the light source is LED light source, setting on the outside of light source
There is hemispherical reflector, the hemispherical reflector is equipped with light-transmitting opening, and the LED light source is located at the ball of hemispherical reflector
The heart.
5. starry sky projector according to claim 4, which is characterized in that the corresponding centre of sphere angle of the light-transmitting opening is less than 90
Degree.
6. starry sky projector according to claim 1, which is characterized in that each small reflector in the reflection mirror array
To be rectangular, and side length is 1-10mm, and the reflection mirror array is pasted on a curved-surface structure and forms curved-surface reflection side.
7. starry sky projector according to claim 1, which is characterized in that it include multiple patterns in the pattern segments, it is described
The corresponding region of pattern is transparent area.
8. starry sky projector according to claim 1, which is characterized in that further include connect with the reflection mirror array
One driving mechanism drives the reflection mirror array to rotate.
9. starry sky projector according to claim 1, which is characterized in that further include second connect with the beam splitting unit
Driving mechanism drives the beam splitting unit mobile or rotation.
10. starry sky projector according to claim 1, which is characterized in that the light source is laser remote excitation fluorescent powder
It is reflective to be provided with hemispherical including the semiconductor laser and phosphor sheet along optical path gap setting, on the outside of the light source for light source
Bowl, the phosphor sheet are located at the sphere center position of the hemispherical reflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820456317.XU CN208222182U (en) | 2018-04-02 | 2018-04-02 | Starry sky projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820456317.XU CN208222182U (en) | 2018-04-02 | 2018-04-02 | Starry sky projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208222182U true CN208222182U (en) | 2018-12-11 |
Family
ID=64503996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820456317.XU Expired - Fee Related CN208222182U (en) | 2018-04-02 | 2018-04-02 | Starry sky projector |
Country Status (1)
| Country | Link |
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| CN (1) | CN208222182U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108613048A (en) * | 2018-04-02 | 2018-10-02 | 佛山市南海区协隆电器有限公司 | Starry sky projector |
-
2018
- 2018-04-02 CN CN201820456317.XU patent/CN208222182U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108613048A (en) * | 2018-04-02 | 2018-10-02 | 佛山市南海区协隆电器有限公司 | Starry sky projector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181211 Termination date: 20200402 |