CN104345535B

CN104345535B - LASER Light Source and projection arrangement

Info

Publication number: CN104345535B
Application number: CN201410535060.3A
Authority: CN
Inventors: 杨毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-10-12
Filing date: 2014-10-12
Publication date: 2016-06-22
Anticipated expiration: 2034-10-12
Also published as: CN104345535A

Abstract

The present invention proposes a kind of LASER Light Source and projection arrangement, including diode laser matrix, for launching laser to first direction；Wavelength convert rotating disk, this wavelength convert rotating disk includes the wavelength conversion layer being along the circumferential direction distributed being positioned in its card；Also include reflection unit, for by the laser-bounce launched in the first direction the wavelength conversion layer converging at wavelength convert rotating disk, the laser light incident reflected in the angle of incidence of wavelength conversion layer more than the first angle；Also include driving device, be used for driving wavelength convert rotating disk to rotate。The LASER Light Source of the present invention makes the laser light incident being reflected device reflection in the angle of wavelength conversion layer more than the first angle by arranging the orientation of reflection unit, thus having got out of the way the aperture within the first angle makes Stimulated Light to export, and this makes the light path of Stimulated Light and laser be distinguished。Compared with prior art, the LASER Light Source structure in the present invention is more compact, and volume is less。

Description

LASER Light Source and projection arrangement

Technical field

The present invention relates to light source field, particularly relate to use the light source of laser technology and use the projection arrangement of this LASER Light Source。

Background technology

Currently, light source technology is applied to numerous areas, and applying maximum light sources is Halogen light and fluorescent lamp。The maximum problem of these light sources is luminance shortage。In recent years, LED light source quickly grows, and utilizes blue LED to excite the yellow fluorescent powder being coated on LED surface to produce white light, and this light source has begun to commercially popularize。But it has a problem in that the power of single LEDs light source is relatively low, the problem that still there is luminance shortage。

And high-luminance light source domain, conventional is high voltage mercury lamp and xenon source, and such light source relies on ultrashort lamp arc to have significantly high brightness (energy density), but has a problem in that its life-span only has 1000 hours, and use cost is significantly high。

Occurring in that a kind of semiconductor light source at present, its structure is as shown in Figure 1。The exciting light 121 that excitation source (not shown in FIG.) sends is incident in lens 103 through the transmission of light splitting optical filter 111 and focuses on wavelength convert rotating disk 102 through the refraction of lens 103。Wavelength convert rotating disk 102 includes the wavelength conversion layer 101 being along the circumferential direction distributed, and this wavelength convert rotating disk 102 is driven and uniform rotation by motor 104 so that the diverse location of wavelength conversion layer 101 is periodically positioned under the exciting of exciting light 121 and continuous illumination。Collimate after being collected from the Stimulated Light 122 of wavelength conversion layer 101 outgoing by lens 103, the final outgoing through the reflection of light splitting optical filter 111。In this light source, light splitting optical filter 111 transmission exciting light reflects Stimulated Light simultaneously, its role is to the light path by exciting light and Stimulated Light and is separated。If not this light splitting optical filter, then Stimulated Light is by all to the outgoing of excitation source direction thus causing serious light loss。

But, because of the existence of light splitting optical filter, whole light-source structure becomes complicated and huge, and this is unfavorable for the development trend of current light source miniaturization。It addition, the remaining exciting light in emergent light can be filtered out by light splitting optical filter, this is also a part of light loss。

Summary of the invention

The present invention proposes a kind of LASER Light Source, including diode laser matrix, for launching laser to first direction；Wavelength convert rotating disk, this wavelength convert rotating disk includes the wavelength conversion layer being along the circumferential direction distributed being positioned in its card, and diode laser matrix and wavelength convert rotating disk are in Different Plane；In projection in the first direction, the multiple laser diodes in diode laser matrix are all be arranged in around wavelength convert rotating disk with circle-shaped, so that whole light source looks over the profile with sub-circular in a first direction；And in projection in a first direction, multiple laser diodes and wavelength convert rotating disk lay respectively at the both sides of this circle；Also include reflection unit, for by the laser-bounce launched in the first direction the wavelength conversion layer converging at wavelength convert rotating disk, the laser light incident reflected in the angle of incidence of wavelength conversion layer more than the first angle；Also include driving device, be used for driving wavelength convert rotating disk to rotate。

The present invention also proposes a kind of projection arrangement, including the above-mentioned LASER Light Source lighting source for this projection arrangement, also includes the light that LASER Light Source sends by light valve and is modulated producing image。

The LASER Light Source of the present invention makes the laser light incident being reflected device reflection in the angle of wavelength conversion layer more than the first angle by arranging the orientation of reflection unit, thus having got out of the way the aperture within the first angle makes Stimulated Light to export, and this makes the light path of Stimulated Light and laser be distinguished。Compared with background technology, the LASER Light Source structure in the present invention is more compact, and volume is less。

Accompanying drawing explanation

Fig. 1 illustrates the structural representation of light source in prior art；

Fig. 2 A and 2B represents first embodiment of the invention schematic diagram in the two directions；

Fig. 3 A illustrates the structural representation of another embodiment of the present invention；

Fig. 3 B illustrates the front view of the first smooth collecting lens in Fig. 3 A illustrated embodiment；

Fig. 4 illustrates the structural representation of another embodiment of the present invention；

Fig. 5 A illustrates the structural representation of another embodiment of the present invention；

Fig. 5 B illustrates the structural representation of another embodiment of the present invention；

Fig. 6 illustrates the structural representation of another embodiment of the present invention。

Detailed description of the invention

The present invention proposes a kind of LASER Light Source, and its structural representation is as shown in Figure 2 A and 2 B。The left side of Fig. 2 A and 2B indicates the schematic diagram of rectangular coordinate system respectively: being upwards x direction in Fig. 2 A, be to the right z direction, vertical paper is outwards y direction；Being upwards y direction in Fig. 2 B, be to the right x direction, vertical paper is outwards z direction。Fig. 2 A and 2B uses same coordinate system, and this indicates the observed bearing of the schematic diagram in Fig. 2 A and 2B。It should be noted that in the present invention that the legend of all embodiments is all by identical coordinate system, the coordinate system identified in figure below all illustrates the observed bearing of corresponding embodiment, and this is not repeated explanation in narration below。

As shown in Figure 2 A, in the present embodiment, LASER Light Source includes diode laser matrix (representing two therein with laser diode 201), for launching laser (using laser beam 221 as a citing) to first direction (z direction)；Also including wavelength convert rotating disk 202, this wavelength convert rotating disk 202 includes the wavelength conversion layer 202a (see Fig. 2 B) being along the circumferential direction distributed being positioned in its card。LASER Light Source also includes reflection unit (representing two therein with reflecting mirror 204), for the laser launched in the first direction 221 reflects and converges at the wavelength conversion layer 202a of wavelength convert rotating disk, the laser 221 reflected is incident in the angle of incidence of wavelength conversion layer 202a more than the first angle；Also include driving device 203, be used for driving wavelength convert rotating disk 202 to rotate。

In the present embodiment, reflection unit includes multiple with laser diode reflecting mirror one to one (representing two therein with reflecting mirror 204), the orientation of each reflecting mirror is adjusted by laser beam incident thereon is reflexed to the same point on wavelength conversion layer 202a, and so all laser can converge on wavelength conversion layer 202a and it be excited and produces Stimulated Light。Stimulated Light is isotropic emission, preferably, the surface of wavelength convert rotating disk 202 is reflecting surface (such as wavelength convert rotating disk 202 has reflectance coating as reflective aluminum plate or its surface), the Stimulated Light then launched to-y direction can be reflected by the reflecting surface of wavelength convert rotating disk and transfer to the outgoing of+y direction, and this is favorably improved the collection efficiency of Stimulated Light。

In the present embodiment, driving device 203 drives wavelength convert rotating disk 202 to rotate, and this makes the light that is periodically excited of the diverse location on wavelength conversion layer 202a excite, and this can effectively be avoided some point of wavelength conversion layer to be excited and overheating failure by continuous print。Laser 221 is reflected by reflection unit 204, the laser 221 reflected is incident in the angle of incidence of wavelength conversion layer 202a more than the first angle, such major part being advantageous in that in Stimulated Light can cause damage from outgoing in the aperture less than the first angle without overlapping with the light path of laser 221, for instance in Fig. 2 A, Stimulated Light 222 is from outgoing in the aperture less than the first angle。

The LASER Light Source of the present embodiment does not adopt the optical texture of big tablet filter 111 light splitting in Fig. 1 to distinguish the light path of exciting light (laser) and Stimulated Light, but make the laser light incident being reflected device reflection in the angle of wavelength conversion layer 202a more than the first angle by arranging the orientation of reflection unit, thus having got out of the way the aperture within the first angle makes Stimulated Light to export so that the light path of Stimulated Light and laser is distinguished。Compared with the background technology in Fig. 1, the LASER Light Source structure in the present embodiment is more compact, and volume is less。

In the present embodiment, as shown in Figure 2 B, in projection in the first direction, the multiple laser diodes 201 in diode laser matrix are arranged in wavelength convert rotating disk 202 around, so can further promote the compactedness of system。

In the present embodiment, it is preferred that on the wavelength conversion layer 202a of wavelength convert rotating disk, along the circumferential direction distribution has multiple sections, and at least a part of which one section includes material for transformation of wave length。Such being advantageous in that, these multiple sections can have different wavelength convert attributes, and so when wavelength convert rotating disk 202 driven device 203 is driven rotation, these multiple sections can be incident and produce the Stimulated Light of different colours by laser 221 periodically successively。The Stimulated Light of these periodically variable different colours can as the light source light of projection arrangement。

Further, laser is blue laser, at least includes scattering section, scattering section includes scattering material in multiple sections of wavelength conversion layer。When this scattering section turns to the convergent point of blue laser, blue laser is scattered material institute's scattering and outgoing forms blue emergent light, and wherein the effect of scattering material is in that to eliminate the coherence of laser。Preferably, scattering section is also possible that at least one in blue wavelength transition material, green wavelength transition material, dark green material for transformation of wave length, yellow green material for transformation of wave length, yellow wavelengths transition material, so when blue laser is incident in scattering section, part blue laser is directly scattered outgoing, and part blue laser is absorbed by above-mentioned material for transformation of wave length and produces the Stimulated Light of respective color, this partially-excited light can mix outgoing with the blue laser being scattered directly outgoing。This partially-excited light has certain correcting for the color of blue laser so that the color of the mixed light of outgoing is closer to the blue light color of standard。

Certainly, wavelength conversion layer is likely to and only includes a section, for instance only including a green segment containing green wavelength transition material, so this LASER Light Source is by outgoing green glow。Such as only including a section containing yellow wavelengths transition material again, so this LASER Light Source is by outgoing gold-tinted；If now laser is blue light, this LASER Light Source be also possible to outgoing gold-tinted and there is no absorbed remaining blue light thus outgoing white mixed light。

What deserves to be explained is, the reflecting mirror 204 in the present embodiment is the reflecting mirror for laser, and it is likely to reflection Stimulated Light and is likely to transmission Stimulated Light。If its transmission Stimulated Light, then, within the outgoing scope of Stimulated Light is just not limited only to the first angle, the Stimulated Light beyond the first angle is likely to the outgoing through reflecting mirror 204。Now, although reflecting mirror 204 is provided with the selection attribute to optical wavelength of optical filter, but the present embodiment still has the advantage that compact conformation volume is little compared with the structure shown in Fig. 1。

In actual applications, choosing of the first angle has certain rule。If choosing excessive, then the input path of laser designs and assembles all highly difficult；If choosing too small, the emergent light exit aperture on wavelength conversion layer is subjected to impact。Preferably, the first general value of angle is between 45 degree to 70 degree。

The structural representation of an alternative embodiment of the invention is as shown in Figure 3A。With the embodiment shown in Fig. 2 A the difference is that, in the present embodiment, also include the first smooth collecting lens 305。The front view of the first smooth collecting lens 305 as shown in Figure 3 B, includes internal 305b, outside two regions of 305a in its effective aperture。As shown in Figure 3A, be reflected device 304 reflection laser 321 be incident in the first smooth collecting lens 305 effective aperture perimeter 305a and by its refraction and converge on the wavelength conversion layer of wavelength convert rotating disk, it is incident in (including Stimulated Light or Stimulated Light and the mixed light of the exciting light being scattered, represent with the dotted line with arrow in figure 3 a) the interior zone 305b of the effective aperture of the first smooth collecting lens 305 from most of light of wavelength conversion layer outgoing and is collected and outgoing by it。

Knowledge according to geometric optics is appreciated that, the light of the perimeter 305a being incident in the first smooth collecting lens can be incident in wavelength conversion layer with bigger angle after superrefraction, the scope controlling perimeter 305a just can control the angular range of incident laser so that it is meets the requirement more than the first angle。It is to say, in the present embodiment, by the scope of the interior zone in the effective aperture of control the first smooth collecting lens 305 and perimeter, it is possible to achieve control the incident angle range of laser 321 so that it is meet the angle of incidence requirement more than the first angle。Simultaneously, from the light (including Stimulated Light or Stimulated Light and the mixed light of the exciting light being scattered) of wavelength conversion layer outgoing, major part is incident in the interior zone 305b of the effective aperture of the first smooth collecting lens 305 and is collected and outgoing by it, has thus successfully distinguished the light path of laser and Stimulated Light。

Certainly in the present embodiment, reflecting mirror 304 can also be the optical filter of reflection laser transmission Stimulated Light, and the part more than the first angle outgoing in such Stimulated Light can also pass through reflecting mirror 304 and outgoing collected by light path below。

The present embodiment, compared with the embodiment shown in Fig. 2 A, employs the collection of first smooth collecting lens convergence and Stimulated Light to realize laser, and light efficiency is higher, and system design is more simple and compact。

Originally executing in example, it is preferred that also include the light shaping device in the light path between the smooth collecting lens of diode laser matrix to first or light scattering device。Light shaping device is probably microlens array or optical diffraction original paper (DOE), for the laser facula being incident in wavelength conversion layer is shaped to predetermined shape, such as square or rectangular, and the laser facula being incident in wavelength conversion layer can be scattering into circle or the ellipse of substantially gaussian by light scattering device。In a word, no matter light shaping device or the laser facula being incident in wavelength conversion layer can be spread to reduce laser power density by light scattering device, this is helpful for the lifting of the conversion efficiency of wavelength conversion layer。

The structural representation of an alternative embodiment of the invention is as shown in Figure 4。The present embodiment is the modified model of the embodiment shown in Fig. 3 A。Compared with the embodiment shown in Fig. 3 A, the LASER Light Source of the present embodiment also includes the second smooth collecting lens 406 being positioned at the first smooth collecting lens 405 light path rear end, includes two regions internal, outside in the effective aperture of the second smooth collecting lens 406；Reflection unit 404 is the reflection plated film of the perimeter being positioned at the second smooth collecting lens 406, and the interior zone of the effective aperture of the second smooth collecting lens is for collecting the light from the first smooth collecting lens 405 outgoing。So, second smooth collecting lens 406 is just integrated with reflection unit 404, laser reflection unit 404 on the perimeter of the second smooth collecting lens reflects and is incident in the perimeter of the first smooth collecting lens, further collimates from the light of the interior zone outgoing of the first smooth collecting lens 405 through the interior zone of the second smooth collecting lens or focuses on outgoing simultaneously。Obviously, the LASER Light Source structure so formed is more compact。

In the above-described embodiments, in a first direction (z direction) diode laser matrix is arranged in around wavelength convert rotating disk to ensure；The laser that laser diode sends will not be blocked by wavelength convert rotating disk。It practice, which limit the quantity of laser diode, also limit the general power of laser and the total brightness of light source。In order to improve this problem, in another embodiment (its structural representation is as shown in Figure 5A), diode laser matrix includes at least one the first laser diode 511, the card being positioned at wavelength conversion layer 502a survey of the laser traverse wavelength convert rotating disk 502 that this first laser diode 511 is launched。In the present embodiment, the wavelength conversion layer 502a card surveyed that is positioned at of wavelength convert rotating disk 502 is transparent。Such as its material is clear glass, such laser diode 511 launch laser 513 just can this clear glass of transmission and be incident in reflection unit 512 and be reflected off and with other laser converge and wavelength conversion layer 502a。Embodiment shown in Fig. 5 B then illustrates another laser and surveys the mode of card in wavelength conversion layer。In this embodiment, the wavelength conversion layer 502a card surveyed that is positioned at of wavelength convert rotating disk has three void region 502b1, has join domain 502b2 to carry and drive the rotation in region at wavelength conversion layer place between void region。When wavelength convert rotating disk rotates, may be passed through three void region 502b1 at most of the time inner laser 513 and be incident in reflection unit 512 and be reflected off thus converging at wavelength conversion layer 502a with other laser。

In the aforementioned embodiment, in projection in the first direction, multiple laser diodes in diode laser matrix are all be arranged in around wavelength convert rotating disk with circle-shaped, and so whole light source (z direction) in a first direction looks over the profile (light shell outer cover 241 of the such as sub-circular shown in Fig. 2 B) with sub-circular。In actual applications, squarish or rectangular configuration are also often application, in embodiment as shown in Figure 6, in projection in the first direction, multiple laser diodes in diode laser matrix are arranged in around wavelength convert rotating disk with oblong-shaped, and this obviously has no effect on the working method of the light source crossed described in above-described embodiment。The demand of profile can be changed by the arrangement mode of obvious laser diode according in practical application。

The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention。

Claims

1. a LASER Light Source, it is characterised in that including:

Diode laser matrix, for launching laser to first direction；

Wavelength convert rotating disk, this wavelength convert rotating disk includes the wavelength conversion layer being along the circumferential direction distributed being positioned in its card；Described diode laser matrix and wavelength convert rotating disk are in Different Plane；In projection in the first direction, the multiple laser diodes in described diode laser matrix are all be arranged in around described wavelength convert rotating disk with circle-shaped, so that whole light source looks over the profile with sub-circular in a first direction；And in projection in a first direction, the plurality of laser diode and wavelength convert rotating disk lay respectively at the both sides of this circle；

Reflection unit, for by the laser-bounce launched in the first direction the wavelength conversion layer converging at described wavelength convert rotating disk, the laser light incident reflected in the angle of incidence of wavelength conversion layer more than the first angle；

Also include driving device, be used for driving wavelength convert rotating disk to rotate。

2. LASER Light Source according to claim 1, it is characterised in that on the wavelength conversion layer of described wavelength convert rotating disk, along the circumferential direction distribution has multiple sections, and at least a part of which one section includes material for transformation of wave length。

3. LASER Light Source according to claim 2, it is characterised in that described laser is blue laser, at least includes scattering section, scattering section includes scattering material in multiple sections of described wavelength conversion layer。

4. LASER Light Source according to claim 3, it is characterized in that, described scattering section also includes at least one in blue wavelength transition material, green wavelength transition material, dark green material for transformation of wave length, yellow green material for transformation of wave length, yellow wavelengths transition material。

5. the LASER Light Source according to any one in Claims 1-4, it is characterized in that, also include the first smooth collecting lens, two regions internal, outside are included in the effective aperture of this first smooth collecting lens, the laser light incident being reflected device reflection in the perimeter of the effective aperture of the first smooth collecting lens and converges on the wavelength conversion layer of wavelength convert rotating disk, is incident in the interior zone of the effective aperture of the first smooth collecting lens from most of light of wavelength conversion layer outgoing and is collected and outgoing by it。

6. LASER Light Source according to claim 5, it is characterised in that also include the light shaping device in the light path between the smooth collecting lens of diode laser matrix to first or light scattering device。

7. LASER Light Source according to claim 5, it is characterised in that also include the second smooth collecting lens being positioned at the first smooth collecting lens light path rear end, include two regions internal, outside in the effective aperture of the second smooth collecting lens；Described reflection unit is the reflection plated film of the perimeter being positioned at the second smooth collecting lens, and the interior zone of the effective aperture of the second smooth collecting lens is for collecting the light from the first smooth collecting lens outgoing。

8. the LASER Light Source according to any one in Claims 1-4, it is characterized in that, described diode laser matrix includes at least one the first laser diode, the card being positioned at wavelength conversion layer survey of the laser traverse wavelength convert rotating disk that this first laser diode is launched。

9. a projection arrangement, it is characterised in that include the LASER Light Source according to any one of claim 1 to 8 lighting source for this projection arrangement, also includes the light that LASER Light Source sends by light valve and is modulated producing image。