CN102566236B - Light source device, light source generating method and laser projector comprising light source device - Google Patents
Light source device, light source generating method and laser projector comprising light source device Download PDFInfo
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- CN102566236B CN102566236B CN201210055604.7A CN201210055604A CN102566236B CN 102566236 B CN102566236 B CN 102566236B CN 201210055604 A CN201210055604 A CN 201210055604A CN 102566236 B CN102566236 B CN 102566236B
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Abstract
The invention discloses a light source device, a light source generating method and a laser projector comprising the light source device. The light source device comprises a light source. The light source comprises a first light source, a second light source and a third light source which have different main wavelengths. The light source device further comprises a collimation part, a convergence part and a beam shaping part, wherein the collimation part is positioned at the emergency sides of the first light source, the second light source and the third light source and is used for carrying out collimation processing on the received light sources to obtain parallel beams; the convergence part is used for carrying out convergence processing on the first light source, the second light source and the third light source which are subjected to collimation processing; the beam shaping part is used for carrying out beam shaping processing on the first light source, the second light source and the third light source from the convergence part, so that the first light source, the second light source and the third light source enters a receiving part along the same direction. According to the invention, the number of parts in the light source device can be effectively reduced, an optical path is simplified, the energy utilization rate is improved and the light source device is simple to install and maintain.
Description
Technical field
The present invention relates to Color Laser Projection Technology, particularly relate to a kind of light supply apparatus, light source generation method and comprise the laser projection of this light supply apparatus.
Background technology
In recent years, laser projection because its principle is simple, manufacture difficulty is low, rich color and the advantage such as visual impact is little and be widely used in multiple occasion, such as television projection, micro projection and some commercial and entertainment systems etc.
As everyone knows, optical frame at least needs to be made up of the light wave of different predominant wavelength, such as blue, green and red light wave.Based on current technology, the light source of another kind of wavelength can be generated under normal circumstances using a kind of light source of wavelength as exciting light, then again with the light source time division emission of other wavelength, demonstrate various picture on the projection screen.The blue laser such as sent using blue semiconductor laser, as exciting light, excites green light fluorescent powder to produce green glow.
Fig. 1 is structure and the principle schematic of light supply apparatus in prior art.See Fig. 1, light source here comprises: the first light source 101, secondary light source (not shown) and the 3rd light source 116 that wavelength is different.This light supply apparatus comprises: collimating mirror 102, catoptron group 103, first collector lens 104, first dichroic sheet 105, second collector lens 106, fluorescent wheel 107, first deviation mirror 109a, the second deviation mirror 109b, the first catoptron 110a, the second catoptron 110b, the second dichroic sheet 111, the 3rd collector lens 112, optical wand 113, the 4th collector lens 114 and the 3rd deviation mirror 115.
Wherein the first dichroic sheet 105 allow the first light source and the 3rd light source through, secondary light source is reflected, the second dichroic sheet 111 allow the first light source through, secondary light source and the 3rd light source are reflected.
Further, in the subregion of fluorescent wheel 107, be coated with fluorescent powder, when with the first light source 101 for exciting light, be coated with fluorescent powder region produce secondary light source.Because fluorescent wheel is rotatable, the first light source irradiation, to the zones of different of fluorescent wheel 107, can produce the light of different wave length.
In FIG, the light beam with first wave length of the first light source 101 outgoing is that divergent shape is incident to collimating mirror 102, and this beam collimation is become parallel beam by collimating mirror 102; The reflex of catoptron makes the optical axis 90-degree rotation of this parallel beam, and the first collector lens 104 is assembled, to the first dichroic sheet 105 outgoing the parallel beam after rotation optical axis; The light beam of the first light source, through after the first dichroic sheet 105, is assembled after process through the second collector lens 106, is arrived fluorescent wheel 107.
Fluorescent wheel 107 rotates under the driving of CD-ROM drive motor 117.For the fluorescent wheel 107 in rotation, if when the first light source 101 is incident in phosphor area, excitated fluorescent powder launches the secondary light source with second wave length, this secondary light source is with the direction outgoing in contrast to the first light source incidence direction, after arriving the first dichroic sheet 105, its optical axis is rotated by 90 degrees under reflex, then after the first deviation mirror 109a, the first catoptron 110a, the second deviation mirror 109b, incident to the second dichroic sheet 111; Because the second dichroic sheet 111 pairs of secondary light sources reflect, then light beam directive the 3rd collector lens 112 of secondary light source, finally focuses in optical wand 113.In brief, when the first light source 101 is incident in the phosphor area of fluorescent wheel 107, what optical wand 113 was collected is the secondary light source with second wave length.
If when the first light source 101 is incident in the penetrating region of uncoated fluorescent powder on fluorescent wheel 107, first light source 101 transmission fluorescent wheel 107, through the 4th collector lens 114, second catoptron 110b and the 3rd deviation mirror 115 convergence, reflect and turn to after, transfer to the 3rd collector lens 112 through the second dichroic sheet 111, finally focus in optical wand 113.That is, when the first light source 101 is incident in the penetrating region of fluorescent wheel 107, what optical wand 113 was collected is first light source with first wave length.
There is the 3rd light source 116 of the 3rd wavelength to be parallel to the direction outgoing of the optical axis of the first light source, after the convergence of the second collector lens 106, arrive the first dichroic sheet 105, due to the first dichroic sheet 105 allow the 3rd light source through, then the 3rd light source is again after the first deviation mirror 109a, the first catoptron 110a, the turning to, reflect and turn to of the second deviation mirror 109b, arrives the second dichroic sheet 111; Second dichroic sheet 111, by the optical axis 90-degree rotation of the 3rd light source 116, through the 3rd collector lens 112, finally focuses in optical wand 113.
Based on above structure and principle, by controlling the lighting time of the first light source and the 3rd light source, controlling the rotational speed of fluorescent wheel simultaneously, the first light source can be realized, secondary light source, the 3rd light source timesharing enter in optical wand 113, obtain the hot spot of different colours, and then form display frame.
Although above-mentioned existing light supply apparatus makes laser projection be achieved, can find very intuitively from Fig. 1, the optics in this light supply apparatus is too much, light path is long.Light beam often through an optics, all can lose part energy, and the length of light path also can affect the energy loss of light beam.Therefore, after each light source transmits in the light supply apparatus shown in Fig. 1, energy has and reduces largely, and capacity usage ratio is lower.
And in existing light supply apparatus, the more one-piece construction that causes of optics quantity is comparatively complicated, and volume also can be correspondingly larger.Such light supply apparatus obviously cannot adapt to more and more significantly small form factor requirements.
In addition, in order to ensure the normal operation of light supply apparatus, must ensure the correctness of self installation site of each optics and relative position, assembly difficulty is larger; When optics wherein breaks down, cannot find problem place the short time, maintenance difficulty is higher.
Therefore, there are a kind of needs of light supply apparatus to capacity usage ratio can be improved.
Summary of the invention
Embodiments of the invention provide a kind of light supply apparatus, light source generation method and comprise the laser projection of this light supply apparatus, can improve capacity usage ratio.
In an embodiment of the present invention, light supply apparatus comprises light source, this light source comprises the first light source, secondary light source and the 3rd light source with different predominant wavelength, this light supply apparatus comprises further: collimating components, convergence parts, beam shaping parts and light-receiving member, and wherein said light-receiving member, convergence parts and beam shaping parts are installed with one heart; Described collimating components is positioned at the emitting side of the first light source, secondary light source and the 3rd light source, for carrying out collimation process to the light source received, obtains parallel beam; The first light source after the process of described convergence parts collimation, secondary light source and the 3rd light source carry out convergence process and to described beam shaping part transfers; Described beam shaping parts carry out beam shaping process to from the first light source of described convergence parts, secondary light source and the 3rd light source, are incident to described light-receiving member in the same direction to make the first light source, secondary light source and the 3rd light source.
In one embodiment of the invention, the center line connecting direction of described convergence parts and beam shaping parts is first direction; Described collimating components is further by direction outgoing parallel or consistent with described first direction to the first light source after collimation process, secondary light source and the 3rd light source edge.
Wherein, described convergence parts comprise: lens ring, and the first light source, secondary light source and the 3rd light source after collimation process are converted to convergent beam by parallel beam, and to described beam shaping part transfers;
Described beam shaping parts comprise negative focal length lens, carrying out beam shaping process to from the first light source of described convergence parts, secondary light source and the 3rd light source, obtaining propagating reduced to being less than or equal to receive threshold and along the light beam of described first direction outgoing.
Described lens ring is Fresnel Lenses, and described Fresnel Lenses comprises groove on the surface towards described collimating components, and comprises light face on the surface of described collimating components dorsad.
Described Fresnel Lenses can be positive Fresnel Lenses.
Described Fresnel Lenses comprises according to the distribution of the light beam of the first light source, secondary light source and the 3rd light source outgoing and quantity and the N number of annular eyeglass arranged, N be greater than or equal to 1 natural number, as N=1, Fresnel Lenses is convex lens.
Wherein, the n-th annular eyeglass of described Fresnel Lenses and described negative focal length lens form the n-th panntographic system, n=1,2,3,4 ..., N; The multiplying power of described n-th panntographic system increases with the increase of n.
Wherein, the first light source and secondary light source with annular beam outgoing to described collimating components, wherein the light beam of the first light source and secondary light source with first direction place plane for interphase; 3rd light source is with circular beam exit to described collimating components, and wherein this circular light beam is positioned within the inner ring of the annular beam of the first light source and secondary light source; Or the first light source and secondary light source are with annular beam outgoing to described collimating components, and the 3rd light source is with circular beam exit to described collimating components, and wherein the annular beam of the first light source is between the annular beam and the circular light beam of the 3rd light source of secondary light source; Or the first light source and secondary light source are with annular beam outgoing to described collimating components, and the 3rd light source is with circular beam exit to described collimating components, and wherein the annular beam of secondary light source is between the annular beam and the circular light beam of the 3rd light source of the first light source; The central point of described annular beam and circular light beam drops on the extended line of first direction.
Wherein, described light-receiving member comprises: collector lens and optical wand, and collector lens carries out convergence process for treating the light source entering described light-receiving member, and described optical wand is for collecting the light source of the convergence process through collector lens.
Or described light-receiving member comprises: fly's-eye lens, for receiving and collecting the light source waiting to enter described light-receiving member.
In the light source generation method of the embodiment of the present invention, for comprising in the light supply apparatus of light source, collimating components, convergence parts, beam shaping parts and light-receiving member, light source comprises the first light source, secondary light source and the 3rd light source with different predominant wavelength, the method comprises: carry out collimation by collimating components to the light source received and process, obtain parallel beam; Carry out convergence by the first light source after the process of described convergence parts collimation, secondary light source and the 3rd light source to process, and to described beam shaping part transfers; Carry out beam shaping process by described beam shaping parts to from the first light source of described convergence parts, secondary light source and the 3rd light source, be incident to described light-receiving member in the same direction to make the first light source, secondary light source and the 3rd light source.
Laser projection of the present invention, comprising: bare engine module, control module, electric power driving module and aforesaid light supply apparatus, and wherein, described bare engine module is made up of even optical illumination parts, display chip and projection lens; Described light supply apparatus provides available light source for laser projection; Described bare engine module receives the light source that described light supply apparatus provides, even optical illumination parts are wherein to the further even light of light source, display chip generates picture under the real-time control of control module, and the picture generated goes out picture to display through projection lens projects again; Described electric power driving module provides driving electric energy for described light supply apparatus and display chip.
In exemplary optical device of the present invention, by collimating components, assemble parts and beam shaping parts, each light source with different wave length is carried out to collimation process, assembles process and beam shaping process, namely bootable for be incident to light-receiving member in the same direction.The number of components comprised in this light supply apparatus is less, and light path is shorter.Compared with existing light supply apparatus, light supply apparatus of the present invention can reduce the energy loss of laser beam in transmitting procedure effectively, thus improves capacity usage ratio.
Correspondingly, when light utilization efficiency is high, the laser projection in the present invention just can provide that rich color, stereovision are strong, picture shows image clearly.
In addition, convergence parts in the present invention and beam shaping parts such as can comprise Fresnel Lenses and negative focal length lens, all belong to the optics that optical principle is simple, price is lower, this just makes light supply apparatus in the present invention compared with existing light source, has obviously cost advantage.
The present invention had both been applicable to the laser projection generally used, and can also be applicable to compound eye laser projection, versatility is stronger.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.Apparently, the accompanying drawing in below describing is only some embodiments of the present invention, for those of ordinary skills, can also obtain other embodiment and accompanying drawing thereof according to these accompanying drawing illustrated embodiments.
Fig. 1 is structure and the principle schematic of light supply apparatus in prior art.
Fig. 2 is the illustrative principles schematic diagram of the light supply apparatus according to the embodiment of the present invention.
Fig. 3 is the structural representation of the light supply apparatus according to the embodiment of the present invention.
Fig. 4 is the schematic diagram of the laser projection according to the embodiment of the present invention.
Embodiment
Carry out clear, complete description below with reference to accompanying drawing to the technical scheme of various embodiments of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope that the present invention protects.
Fig. 2 is the illustrative principles schematic diagram of the light supply apparatus according to the embodiment of the present invention.As shown in Figure 2, light supply apparatus in the invention process comprises: comprise there is different wave length the first light source 201, secondary light source 208, the 3rd light source 216 incident light source, collimating components 202, assembles parts 217, beam shaping parts 218 and light-receiving member 221.
Wherein, convergence parts 217 and beam shaping parts 218 are installed with one heart;
Collimating components 202 is positioned at the emitting side of the first light source 201, secondary light source 208 and the 3rd light source 216, for carrying out collimation process to the light source received, obtains parallel beam;
The first light source 201, secondary light source 208 and the 3rd light source 216 assembled after the process of parts 217 collimation carries out convergence process, and transmits to beam shaping parts 218;
Beam shaping parts 218 carry out beam shaping process to from assembling the first light source 201 of parts 217, secondary light source 208 and the 3rd light source 216, are incident to described light-receiving member 221 in the same direction to make the first light source 201, secondary light source 208 and the 3rd light source 216.
Above-mentioned light supply apparatus, by collimating components, assembles parts and beam shaping parts, and each light source with different wave length is carried out to collimation process, assembles process and beam shaping process, namely bootable for be incident to light-receiving member in the same direction.The number of components comprised in this light supply apparatus is less, and light path is shorter.Compared with existing light supply apparatus, light supply apparatus of the present invention can reduce the energy loss of laser beam in transmitting procedure effectively, thus improves capacity usage ratio.And change to light path the convergence parts that play a crucial role in the light supply apparatus of the embodiment of the present invention and beam shaping parts only require concentric installation, matching requirements are very simple; When any component failure wherein, even if investigate one by one all parts, find out time that guilty culprit needs and difficulty all comparatively prior art have obvious reduction.
According to the present invention, the center line connecting direction assembling parts 217 and beam shaping parts 218 is first direction; Collimating components 202 will collimate the first light source 201 after processing, secondary light source 208 with the 3rd light source 216 along the direction outgoing parallel or consistent with first direction further.
Assemble parts 217 and such as can comprise lens ring, the first light source 201, secondary light source 208 and the 3rd light source 216 after collimation process are converted to convergent beam by parallel beam, and transmit to beam shaping parts 218.
Lens ring can be Fresnel Lenses, this Fresnel Lenses comprises groove towards the surface of collimating components 202, the surface of collimating components 202 dorsad comprises light face, convergence process can be carried out to the first light source 201, secondary light source 208 and the 3rd light source 216, be converted to convergent beam by parallel beam, then transmit to beam shaping parts 218 again; Beam shaping parts 218 can comprise negative focal length lens, carry out beam shaping process to from assembling the first light source 201 of parts 217, secondary light source 208 and the 3rd light source 216, the propagation diameter that namely convergent beam is converted to light beam by beam shaping parts 218 is less than or equal to the receive threshold of light-receiving member 221 and makes the light beam after shaping along first direction outgoing.
Light-receiving member 221 can with convergence parts 217 and beam shaping parts 218 be concentric installs; First light source 201 of propagation reduced, secondary light source 208 and the 3rd light source 216 transmit along first direction to light-receiving member 221 by beam shaping parts 218.
In one embodiment of the invention, light source generation method is for comprising in the light supply apparatus of light source, collimating components, convergence parts, beam shaping parts and light-receiving member, light source comprises the first light source, secondary light source and the 3rd light source with different predominant wavelength, the method comprises: carry out collimation by collimating components to the light source received and process, obtain parallel beam; Convergence process is carried out by the first light source, secondary light source and the 3rd light source after assembling the process of parts collimation, and to beam shaping part transfers; Carrying out beam shaping process by beam shaping parts to from assembling the first light source of parts, secondary light source and the 3rd light source, being incident to described light-receiving member in the same direction to make the first light source, secondary light source and the 3rd light source.
In one embodiment of the invention, laser projection comprises: foregoing light supply apparatus, bare engine module, control module and electric power driving module.Wherein, bare engine module is made up of even optical illumination parts, display chip and projection lens.Light supply apparatus provides available light source for laser projection.Bare engine module receives the light source that light supply apparatus provides, and even optical illumination parts are wherein to the further even light of light source, and display chip generates picture under the real-time control of control module, and the picture of generation goes out picture to display through projection lens projects again.Electric power driving module provides driving electric energy for light supply apparatus and display chip.
Concrete scheme in the embodiment of the present invention will be described in detail below.
Fig. 3 is the structural representation of the light supply apparatus according to the embodiment of the present invention.
See Fig. 3, in the present embodiment, incident light source comprises the first light source 301, secondary light source 308 and the 3rd light source 316 for having different wave length separately.These three light sources can in homonymy outgoing.Specifically, these three light sources can send laser beam according to following mode:
Mode 1, first light source 301 and secondary light source 308 with annular beam outgoing to collimating components, wherein the light beam of the first light source 301 and secondary light source 308 with first direction place plane for interphase; 3rd light source 316 is with circular beam exit to collimating components, and wherein this circular light beam is positioned within the inner ring of aforementioned toroidal light beam.
Mode 2, first light source 301 and secondary light source 308 with annular beam outgoing to collimating components, 3rd light source is with circular beam exit to collimating components, and wherein the annular beam of the first light source 301 is between the annular beam and the circular light beam of the 3rd light source 316 of secondary light source 308.
Mode 3, first light source 301 and secondary light source 308 with annular beam outgoing to collimating components, 3rd light source is with circular beam exit to collimating components, and wherein the annular beam of secondary light source 308 is between the annular beam and the circular light beam of the 3rd light source 316 of the first light source 301.
The central point of above-mentioned annular beam and circular light beam all drops on the extended line of first direction.
Convergence parts in the present embodiment such as can comprise Fresnel Lenses.A surface of Fresnel Lenses is light face, and another is the ascending multiple concentric circless of imprinting on the surface, and when observing from the side, imprinting has on concentrically ringed surface and is formed with multiple groove.Like this, Fresnel Lenses effectively can assemble process to infrared, Uv and visible light.
When adopting with three kinds of light sources of one of above-mentioned three kinds of modes outgoing and comprising the convergence parts of Fresnel Lenses, the light supply apparatus in the present embodiment comprises: collimating lens system 302, Fresnel Lenses 317, negative focal length lens 318, collector lens 312 and optical wand 313.Fresnel Lenses 317, negative focal length lens 318, collector lens 312 and optical wand 313 are installed all with one heart.Below the center line connecting direction of all parts installed with one heart is called first direction.
Collimating lens system 302 comprises at least one collimation lens, all be positioned at the emitting side of the first light source 301, secondary light source 308 and the 3rd light source 316, collimation process is carried out to the light beam of the first light source 301 received, secondary light source 308 and the 3rd light source 316, obtain parallel beam, and along direction outgoing that is parallel with first direction or that overlap.
Fresnel Lenses 317 all has larger diameter under normal circumstances, therefore can receive whole light beams of collimating lens system outgoing.Fresnel Lenses 317 is including groove on the surface towards the side of collimating lens system 302, the surface of collimating lens system 302 dorsad comprises light face, thus can assemble the first light source 301, secondary light source 308 and the 3rd light source 316, be converted to convergent beam that diameter reduces to some extent and along first direction outgoing.
Fresnel Lenses 317 in the present embodiment can be such as positive Fresnel Lenses.In addition, N number of annular eyeglass can be set on this Fresnel Lenses according to the distribution of the light beam of the first light source 301, secondary light source 308 and the 3rd light source 316 outgoing and quantity, N be greater than or equal to 1 natural number, wherein eyeglass centered by the 1st annular eyeglass, farthest, and the focal length of center eyeglass is f to N number of annular mirror sheet distance center eyeglass
1, the focal length of the n-th annular eyeglass is f
n, n is greater than or equal to 1 and is less than or equal to N, and n is natural number.In the present invention, the focal distance f of the n-th annular eyeglass
nincrease along with the increase of n, f
1minimum, f
nmaximum.When N is 1, Fresnel Lenses is convex lens.
Because center eyeglass and each annular eyeglass have different focal lengths, they are also different to the refraction angle of light beam, and the first light source 301, secondary light source 308 and the 3rd light source 316 so just can be made to be combined into a branch of light beam at negative focal length lens 318 place.
Negative focal length lens 318 is such as concavees lens, these lens carry out beam shaping process to the first light source 301 transmitted with convergent beam form, secondary light source 308 and the 3rd light source 316, obtain diameter and be less than or equal to the receive threshold of light-receiving member for incident beam diameter, by the light beam of each light source from negative focal length lens 318 outgoing, can all be incident to collector lens 312 and optical wand 313.
Under the emission mode of each light source in the present embodiment, the first light source 301, secondary light source 308 and the 3rd light source 316, after collimating lens system 302, first arrive Fresnel Lenses 317, to be converged after process directive negative focal length lens 318 again.Then, after the beam shaping process of negative focal length lens 318, formed and propagate reduced to the light beam being less than or equal to receive threshold, then along first direction to collector lens 312 outgoing.
Collector lens 312 is treated the light source entering light-receiving member and is carried out convergence process, and the light beam being about to receive focuses to optical wand 313, obtains meeting optical wand 313 and receives the light beam required, and to optical wand 313 outgoing; Optical wand 313 collects the light beam of collector lens 312 outgoing, using the light source as laser projection.Collector lens 312 in the present embodiment and optical wand 313 form light-receiving member.
In the present embodiment, the transmission light path of each light source is:
First light source 301, secondary light source 308 and the 3rd light source 316 are transformed into parallel beam after the collimation process of collimating lens system 302, and are incident to Fresnel Lenses 317; The light beam of the first light source 301, secondary light source 308 and the 3rd light source 316, by towards the groove on the surface of collimating lens system 302, is assembled and is projected to negative focal length lens 318 by Fresnel Lenses 317; After the process of convergence again of negative focal length lens 318, form reduced to the parallel beam being less than or equal to receive threshold, then arrive in collector lens 312 and optical wand 313.
In the present embodiment, there is the first light source of different wave length, secondary light source is separated outgoing with the 3rd light source, as long as adjust the outgoing time of each light source according to actual demand, can realize showing different colors at different time, to meet the requirement of laser projection.
In the transmitting procedure of each light source, in the present embodiment, the N number of annular eyeglass of Fresnel Lenses 317 and negative focal length lens 318 form N and overlap panntographic system, the light source-guide of different wave length is become different light paths, but finally all light sources all enter into light-receiving member with close diameter.
Form the first panntographic system by the center eyeglass of Fresnel Lenses 317 and negative focal length lens 318 in the present embodiment, this panntographic system processes the 3rd light source; Form second respectively to N panntographic system by second of Fresnel Lenses 317 to N number of annular eyeglass and negative focal length lens 318, the first light source and secondary light source are processed.
Because the first light source is in the outer ring of the 3rd light source, therefore the multiplying power of the first panntographic system is less than the 2nd to the multiplying power of N panntographic system.In the present invention, the multiplying power of the n-th panntographic system increases with the increase of n, wherein, n=1,2,3,4 ..., N.
From front, the present embodiment can realize light path by means of only three optical elements and guide, and energy loss is very limited, and the lifting amplitude of capacity usage ratio is larger; Further, the minimizing of number of components and the designing requirement of installation with one heart, make installation, debugging and maintenance difficulty all greatly reduce.
In the present embodiment, light-receiving member and the Fresnel Lenses 317 in the light path of front end and negative focal length lens 318 is concentric installs, the optics now without the need to introducing other again can complete the guiding to the first light source, secondary light source and the 3rd light source.
In addition, the light-receiving member that the collector lens in the light supply apparatus of the present embodiment and optical wand form also can be replaced by fly's-eye lens, for receiving and collecting the light source of light-receiving member to be entered.
Fig. 4 is the schematic diagram of the laser projection according to the embodiment of the present invention.See Fig. 4, laser projection comprises: foregoing light supply apparatus 400, bare engine module 401, electric power driving module 402 and control module 403.Wherein, bare engine module 401 is made up of even optical illumination parts, display chip and projection lens.Light supply apparatus 400 provides available light source for laser projection.The light source that bare engine module 401 provides for receiving described light supply apparatus, even optical illumination parts are wherein to the further even light of light source, display chip generates picture under the real-time control of control module 403, and the picture of generation goes out picture to display through projection lens projects again.Described electric power driving module 402 provides driving electric energy for light supply apparatus and display chip.
By each embodiment provided by the invention, by each light sources transmit of different predominant wavelength in the process of light-receiving member, only used optical principle and comparatively simply assemble parts and beam shaping parts, and the negligible amounts of these parts, effectively simplify the structure of light supply apparatus, shorten light path, thus improve capacity usage ratio, and then improve the image quality of laser projection.
Convergence parts in the present invention and beam shaping parts such as can comprise lens ring and negative focal length lens, all belong to the optics that optical principle is simple, price is lower, this just makes light supply apparatus in the present invention compared with existing light source, has obviously cost advantage.
In addition, the diversity requirements of light path change can be met in each embodiment of the present invention by comparatively simple structure, design ingenious, but installation, modulation and maintenance difficulty are all lower.
Light supply apparatus in each embodiment of the present invention had both been applicable to the laser projection generally used, and can also be applicable to compound eye laser projection, had higher versatility.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if belong within the scope of the claims in the present invention and equivalent technologies thereof to these amendments of the present invention and modification, then the present invention also comprises these change and modification.
Claims (7)
1. a light supply apparatus, comprises light source, and this light source comprises the first light source, secondary light source and the 3rd light source with different predominant wavelength, and it is characterized in that, this light supply apparatus comprises further:
Collimating components, convergence parts, beam shaping parts and light-receiving member, wherein said light-receiving member, convergence parts and beam shaping parts are installed with one heart; The center line connecting direction of described convergence parts and beam shaping parts is first direction;
Described collimating components is positioned at the emitting side of the first light source, secondary light source and the 3rd light source, for carrying out collimation process to the light source received, obtains parallel beam along the direction outgoing parallel or consistent with described first direction;
Described convergence parts comprise: lens ring, and the first light source, secondary light source and the 3rd light source after collimation process are converted to convergent beam by parallel beam, and to described beam shaping part transfers;
Described beam shaping parts comprise negative focal length lens, beam shaping is carried out to from the first light source of described convergence parts, secondary light source and the 3rd light source, obtain propagating reduced to the parallel beam being less than or equal to receive threshold, and be incident to described light-receiving member along described first direction; Described receive threshold is the receive threshold of described light-receiving member for incident beam diameter;
Wherein, described lens ring is Fresnel Lenses, and described Fresnel Lenses comprises according to the distribution of the light beam of the first light source, secondary light source and the 3rd light source outgoing and quantity and the N number of annular eyeglass arranged, N be greater than or equal to 1 natural number;
N-th annular eyeglass of described Fresnel Lenses and described negative focal length lens form the n-th panntographic system, n=1,2,3,4 ..., N;
The multiplying power of described n-th panntographic system increases with the increase of n.
2. light supply apparatus according to claim 1, is characterized in that, described Fresnel Lenses comprises groove on the surface towards described collimating components, and comprises light face on the surface of described collimating components dorsad.
3. light supply apparatus according to claim 2, is characterized in that, described Fresnel Lenses is positive Fresnel Lenses.
4., according to one of any described light supply apparatus of claims 1 to 3, it is characterized in that, the first light source and secondary light source with annular beam outgoing to described collimating components, wherein the light beam of the first light source and secondary light source with first direction place plane for interphase; 3rd light source is with circular beam exit to described collimating components, and wherein this circular light beam is positioned within the inner ring of the annular beam of the first light source and secondary light source;
Or the first light source and secondary light source are with annular beam outgoing to described collimating components, and the 3rd light source is with circular beam exit to described collimating components, and wherein the annular beam of the first light source is between the annular beam and the circular light beam of the 3rd light source of secondary light source;
Or the first light source and secondary light source are with annular beam outgoing to described collimating components, and the 3rd light source is with circular beam exit to described collimating components, and wherein the annular beam of secondary light source is between the annular beam and the circular light beam of the 3rd light source of the first light source;
The central point of described annular beam and circular light beam drops on the extended line of first direction.
5. light supply apparatus according to claim 1, it is characterized in that, described light-receiving member comprises: collector lens and optical wand, and collector lens carries out convergence process for treating the light source entering described light-receiving member, and described optical wand is for collecting the light source of the convergence process through collector lens; Or,
Described light-receiving member comprises: fly's-eye lens, for receiving and collecting the light source waiting to enter described light-receiving member.
6. a light source generation method, for comprising in the light supply apparatus of light source, collimating components, convergence parts, beam shaping parts and light-receiving member, described light source comprises the first light source, secondary light source and the 3rd light source with different predominant wavelength, and the method comprises:
Carry out collimation by collimating components to the light source received to process, obtain parallel beam;
Convergence process is carried out by the first light source, secondary light source and the 3rd light source after assembling the process of parts collimation, and to beam shaping part transfers;
Carrying out beam shaping by beam shaping parts to from assembling the first light source of parts, secondary light source and the 3rd light source, obtaining propagating reduced to the parallel beam being less than or equal to receive threshold and being incident to described light-receiving member in the same direction; Described receive threshold is the receive threshold of described light-receiving member for incident beam diameter;
Wherein, described convergence parts comprise lens ring, described beam shaping parts comprise negative focal length lens, described lens ring is Fresnel Lenses, described Fresnel Lenses comprises according to the distribution of the light beam of the first light source, secondary light source and the 3rd light source outgoing and quantity and the N number of annular eyeglass arranged, N be greater than or equal to 1 natural number;
N-th annular eyeglass of described Fresnel Lenses and described negative focal length lens form the n-th panntographic system, n=1,2,3,4 ..., N;
The multiplying power of described n-th panntographic system increases with the increase of n.
7. a laser projection, is characterized in that, this laser projection comprises: bare engine module, control module, electric power driving module and according to the light supply apparatus one of claim 1 to 5 Suo Shu, wherein,
Described bare engine module is made up of even optical illumination parts, display chip and projection lens;
Described light supply apparatus provides available light source for laser projection;
Described bare engine module receives the light source that described light supply apparatus provides, even optical illumination parts are wherein to the further even light of light source, display chip generates picture under the real-time control of control module, and the picture generated goes out picture to display through projection lens projects again;
Described electric power driving module provides driving electric energy for described light supply apparatus and display chip.
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| CN106647124A (en) * | 2013-02-04 | 2017-05-10 | 深圳市光峰光电技术有限公司 | Laser light source, wavelength conversion light source, light composition light source and projection display equipment |
| CN103279005B (en) * | 2013-05-13 | 2015-08-19 | 深圳市绎立锐光科技开发有限公司 | LASER Light Source, wavelength convert light source, conjunction radiant and optical projection system |
| CN106681010A (en) * | 2016-12-06 | 2017-05-17 | 华中科技大学 | Semiconductor laser beam Fresnel focusing device |
| CN112596075B (en) * | 2020-11-26 | 2022-03-25 | 兰州大学 | Multi-excitation-wavelength spectrometer type fluorescence laser radar system |
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