CN102937773B - Light source device and projecting device using same - Google Patents
Light source device and projecting device using same Download PDFInfo
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- CN102937773B CN102937773B CN201210289553.4A CN201210289553A CN102937773B CN 102937773 B CN102937773 B CN 102937773B CN 201210289553 A CN201210289553 A CN 201210289553A CN 102937773 B CN102937773 B CN 102937773B
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Abstract
The invention provides a projecting device, a light source device and a light source component. The light source device comprises an exciting light source, a wavelength conversion unit, a filtering unit, a mechanical drive unit and a driving unit, wherein the exciting light source is used for generating an exciting light; the wavelength conversion unit comprises at least a first wavelength conversion area; the filtering unit comprises at least a first filtering area which is arranged corresponding to the first wavelength conversion area; the mechanical drive unit connects the wavelength conversion unit with the filtering unit; and the driving unit is used for driving one of the wavelength conversion unit, the filtering unit and the mechanical drive unit so as to enable the first wavelength conversion area and the first filtering area to move synchronously. Through the method, the filtering unit and the wavelength conversion unit are driven by the same driving unit through the mechanical drive unit, and the devices are easy to achieve, high in synchronism and the like.
Description
Technical field
The present invention relates to the light sources technical field of illumination and display, particularly relate to a kind of light supply apparatus and use the projection arrangement of this light supply apparatus.
Background technology
At present, projector is widely used in the various application scenarios such as film broadcasting, meeting and publicity.As everyone knows, in the light source of projector, fluorescence colour wheel is often adopted to provide sequence of colored lights.Wherein, by not homochromy section of fluorescence colour wheel in turn and be periodically arranged on the travel path of exciting light, and then the fluorescent material utilizing exciting light to come on not homochromy section of fluorescence excitation colour wheel, to produce the fluorescence without color.But the spectral range produced due to fluorescent material is wider, makes the excitation of part fluorescence not enough, and then cause the colour gamut of light source large not.In this case, generally need to be filtered fluorescence by optical filter, to improve the excitation of fluorescence.But, because the spectral range of the fluorescence of different colours partly overlaps, same optical filter cannot be utilized to filter, therefore need the optical filter that the fluorescence for different colours provides different.
In a kind of solution of prior art, each monochromatic optical filter is put and is made into a filter wheel on the drive means, the rear end light path that filter wheel is placed on fluorescence colour wheel makes both color one_to_one corresponding.Make filter wheel and fluorescence colour wheel carry out precise synchronization by circuit control mode, ensure that a monochromatic light is positioned in light path by the respective filter of filter wheel during filter wheel.Adopt said method to be difficult to the precise synchronization reaching two colour wheels, exist and be difficult to the shortcoming such as realization and synchronous effect difference.
Therefore, need the projection arrangement a kind of light supply apparatus being provided and using this light supply apparatus, with the above-mentioned technical matters existing for the synchronous architecture of the fluorescence colour wheel and optical filter colour wheel that solve projector light source in prior art.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of light supply apparatus and uses the projection arrangement of this light supply apparatus, provides the synchronous architecture of Wavelength converter and filtering apparatus, and improves synchronous effect.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of light supply apparatus, comprising: exciting light sources, for generation of an exciting light; Wavelength converter, described Wavelength converter comprises at least first wave length transition zone; Filtering apparatus, comprises at least corresponding with first wave length transition zone the first filter area arranged; Mechanical driving device, links together Wavelength converter and filtering apparatus; Drive unit, for driving described Wavelength converter and described filtering apparatus, to make described wavelength-converting region and described first filter area be synchronized with the movement, and described wavelength-converting region is periodically arranged on the travel path of described exciting light, and then converts described excitation wavelength to Stimulated Light; First optical module, incide described first filter area for guiding described Stimulated Light, described first filter area filters described Stimulated Light, to improve the excitation of described Stimulated Light.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of projection arrangement adopting above-mentioned light supply apparatus.
The invention has the beneficial effects as follows: the situation being different from prior art, filtering apparatus in light supply apparatus of the present invention is connected by mechanical driving device with Wavelength converter, and drive filtering apparatus, Wavelength converter or mechanical driving device thrin by same drive unit, first wave length transition zone and the first filter area are synchronized with the movement, have and be easy to realize Wavelength converter and filtering apparatus is synchronized with the movement and synchronism advantages of higher.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of light supply apparatus of the present invention.
Fig. 2 is the front view of the first embodiment of Wavelength converter in light supply apparatus of the present invention and filtering apparatus.
Fig. 3 is the front view of the second embodiment of Wavelength converter in light supply apparatus of the present invention and filtering apparatus.
Fig. 4 is the structural representation of the second embodiment of light supply apparatus of the present invention;
Fig. 5 is the structural representation of the 3rd embodiment of light supply apparatus of the present invention;
Fig. 6 is an embodiment of the optical filtering curve of optical filter in the light supply apparatus shown in Fig. 5;
Fig. 7 is the light path schematic diagram in the light supply apparatus shown in Fig. 5 in reflective optical collector;
Fig. 8 is another embodiment of the optical filtering curve of optical filter in the light supply apparatus shown in Fig. 5;
Fig. 9 is another embodiment of reflective optical collector in the light supply apparatus shown in Fig. 5;
Figure 10 is the light supply apparatus medium wavelength conversion equipment shown in Fig. 5 and the coupling efficiency of reflective optical collector and the graph of a relation of ratio D;
Figure 11 is the structural representation of the 4th embodiment of light supply apparatus of the present invention.
Embodiment
Refer to Fig. 1 to Fig. 2, Fig. 1 is the structural representation of the first embodiment of light supply apparatus of the present invention.Fig. 2 is the front view of the first embodiment of wavelength converter device in light supply apparatus of the present invention and filtering apparatus.As shown in Figure 1, the light supply apparatus 100 of the present embodiment mainly comprises exciting light sources 101, rotation axis 102, first light collecting device 109, Wavelength converter 106, filtering apparatus 107, drive unit 108.
Exciting light sources 101 is for generation of an exciting light.In the Wavelength converter of the present embodiment light supply apparatus 100 and the first embodiment of filtering apparatus, exciting light sources 101 is a ultraviolet or near ultraviolet laser instrument or ultraviolet or near ultraviolet light emitting diode, to produce ultraviolet or near ultraviolet excitated light.
As shown in Figure 2, Wavelength converter 106 is a ring texture, comprises at least one wavelength-converting region.In the first embodiment of Wavelength converter 106 and filtering apparatus 107, Wavelength converter 106 comprises the ruddiness transition zone of the circumferential subsection setup around its ring texture, green glow transition zone, blue light transition zone and gold-tinted transition zone.Above-mentioned wavelength-converting region is respectively arranged with different material for transformation of wave length (such as fluorescent material or nano material).The ultraviolet incided on it or near ultraviolet excitated light wavelength conversion can be become the Stimulated Light of respective color by above-mentioned material for transformation of wave length.Specifically, ruddiness transition zone converts the ultraviolet incided on it or near ultraviolet excitated light to ruddiness Stimulated Light, green glow transition zone converts the ultraviolet incided on it or near ultraviolet excitated light to green glow Stimulated Light, blue light transition zone converts the ultraviolet incided on it or near ultraviolet excitated light to blue light Stimulated Light, and gold-tinted transition zone then converts the ultraviolet incided on it or near ultraviolet excitated light to gold-tinted Stimulated Light.Wavelength converter 106 is arranged on the travel path of the exciting light that stimulated luminescence source 101 sends, and Wavelength converter 106 stimulated luminescence excites, change also transmission stimulated luminescence.
As shown in Figure 2, filtering apparatus 107 is a ring texture, and it is positioned at the light emission side of Wavelength converter 106 stimulated luminescence and is intervally arranged with light wavelength conversion device 106.Filtering apparatus 107 comprises at least one filter area.In the first embodiment of Wavelength converter and filtering apparatus, filtering apparatus 107 comprises the ruddiness filter area of the circumferential subsection setup around its ring texture, green glow filter area, blue light filter area and gold-tinted filter area.Above-mentioned filter area is corresponding with the wavelength-converting region of each color on Wavelength converter 106 to be arranged.In the present embodiment light supply apparatus, the filter area of same color and wavelength-converting region are just right.Above-mentioned filter area has different filter ranges, and then filters to the Stimulated Light of respective color, to improve the excitation of Stimulated Light.
As shown in Figure 1, rotation axis 102 is the mechanical driving devices in the present embodiment light supply apparatus.Wavelength converter 106 and filtering apparatus 107 interval are fixed to rotation axis 102.Wavelength converter 106 and filtering apparatus 107 realize being synchronized with the movement by the connection of rotation axis 102.
First light collecting device 109 between Wavelength converter 106 and filtering apparatus 107, for collecting and optically focused Stimulated Light, to reduce the angle of divergence of Stimulated Light.
Drive unit 108 can drive rotation axis 102 or Wavelength converter or filtering apparatus to rotate, and is fixed on the filtering apparatus 107 on rotation axis and Wavelength converter 106 synchronous axial system under the drive of rotation axis 102.
In the course of work of the Wavelength converter shown in light supply apparatus 100 application drawing 2 shown in Fig. 1 and filtering apparatus, the ultraviolet that exciting light sources 101 produces or near ultraviolet excitated light incide on Wavelength converter 106.Wavelength converter 106 and filtering apparatus 107 synchronous axial system under the driving of drive unit 108, and then make each filter area synchronous axial system on each wavelength-converting region on Wavelength converter 106 and filtering apparatus 107.In the rotation process of Wavelength converter 106 and filtering apparatus 107, each wavelength-converting region on Wavelength converter 106 successively and be periodically arranged on the travel path of ultraviolet that exciting light sources 101 produces or near ultraviolet excitated light, makes ultraviolet or near ultraviolet excitated light under the effect of each wavelength-converting region, convert the Stimulated Light of different colours successively to.The Stimulated Light of different colours is collected through the first light collecting device 109, optically focused incide filtering apparatus 107.
Now, to be fixed on same rotation axis 102 due to Wavelength converter 106 and both filtering apparatus 107 and is driven by same drive unit make both be synchronized with the movement, and the wavelength-converting region of Wavelength converter 106 and the same color on filtering apparatus 107 and filter area just right, it is hereby ensured that the Stimulated Light of the different colours produced by each wavelength-converting region of Wavelength converter 106 is collected through the first light collecting device 109 and incides on the filter area of the same color on filtering apparatus 107 after optically focused, and then carry out optical filtering to improve excitation by the filter area of same color.
In the light supply apparatus 100 of the present embodiment, both Wavelength converter 106 and filtering apparatus 107 are fixed on to drive on same rotation axis 102 and by same drive unit and make the two be synchronized with the movement, simultaneously the wavelength-converting region of same color and filter area just right, therefore the wavelength-converting region of same color and filter area are synchronized with the movement, and have to be easy to realize Wavelength converter and filtering apparatus is synchronized with the movement and synchronism advantages of higher.
Further, because the Stimulated Light produced by wavelength convert is generally approximate Lambertian distribution, if this Stimulated Light is directly incident on filter area, then its incident angle all exists from 0 degree to 90 degree.But, penetrance drift along with the increase of incident angle of filter area, therefore first light collecting device, 109 pairs of Stimulated Light are set in the present embodiment further and carry out collection optically focused, make Stimulated Light incide the incident angle of filter area less, further increase filter effect.In the preferred embodiment of the present embodiment light supply apparatus, by adjusting the first light collecting device, the energy that the incident angle inciding filtering apparatus 107 of Stimulated Light can be made to be less than or equal within the scope of 60 degree accounts on 90% of gross energy.More preferably, by adjusting the first light collecting device, the incident angle inciding filtering apparatus 107 energy be less than or equal within the scope of 30 degree of Stimulated Light is made to account for more than 90% of gross energy.In the present embodiment light supply apparatus, the first light collecting device 109 can be lens, solid or hollow tapered light rod, lens combination, hollow or solid compound condenser etc.In addition, in the first embodiment of Wavelength converter and filtering apparatus, wavelength-converting region on Wavelength converter 106 can be ruddiness transition zone, green glow transition zone, blue light transition zone, gold-tinted transition zone, and the one or more combination in any in the transition zone of other color of light, and the light source selecting other suitable is as the exciting light sources of light supply apparatus of the present invention.During wavelength-converting region adjustment on Wavelength converter 106, the color of the Stimulated Light that the filter area on filtering apparatus 107 then produces according to the wavelength-converting region on Wavelength converter 106 carries out corresponding configuration, and the present invention is not restricted this.
Fig. 3 is the front view of the second embodiment of Wavelength converter in light supply apparatus of the present invention and filtering apparatus.Implement, in embodiment, light wavelength conversion device 106 to comprise a blue light photic zone at second of Wavelength converter and filtering apparatus.When the Wavelength converter shown in light supply apparatus of the present invention 100 application drawing 3 shown in Fig. 1 and filtering apparatus, exciting light sources 101 is a blue light-emitting diode (LED, Light Emitting Diode) or blue laser (LD, Laser Diode) to produce blue-light excited light.Except blue light photic zone, light wavelength conversion device also comprises ruddiness transition zone, green glow transition zone and gold-tinted transition zone.Filtering apparatus comprises ruddiness filter area, green glow filter area, gold-tinted filter area, and the balance photic zone corresponding with the blue light photic zone of light wavelength conversion device or blue light filter area (not shown).In order to the balance of rotating, balance photic zone has the same or analogous weight with other filter areas.
Under the driving of drive unit 108, Wavelength converter 106 and filtering apparatus 107 synchronous axial system, make each wavelength-converting region on Wavelength converter 106 and blue light photic zone successively and be periodically arranged on the travel path of the blue-light excited light that exciting light sources 101 produces.Wherein, each wavelength-converting region converts the blue-light excited light incided on it Stimulated Light of corresponding color to and carries out transmission, and blue light photic zone is then transmitted into the blue-light excited light be mapped on it.Blue light photic zone can be arranged suitable scattering mechanism, to destroy the collimation of blue-light excited light.
The Stimulated Light of different colours or blue-light excited light are collected through the first light collecting device 109, optically focused incide filtering apparatus 107; Transmission and in balanced transmission district or blue light filter area transmit blue after the Stimulated Light of different colours filter area to corresponding color of filtering apparatus 107 filters.
Both Wavelength converter 106 and filtering apparatus 107 to be fixed on same rotation axis 102 and to drive rotation axis 102 to make the two be synchronized with the movement by same drive unit, simultaneously the wavelength-converting region of same color is just right with filter area, blue light photic zone with balance photic zone or blue light filter area just right.
In addition, in the second embodiment of Wavelength converter and filtering apparatus, on Wavelength converter 106 except blue light photic zone, Wavelength converter also comprises by ruddiness transition zone, green glow transition zone, gold-tinted transition zone, and the one or more combination in any in the transition zone of other color of light.Or except blue light photic zone and at least one wavelength-converting region, Wavelength converter 106 can also comprise other color of light photic zones, such as ruddiness photic zone; Now, light supply apparatus of the present invention is except comprising blue-light excited radiant, light supply apparatus also comprises red illumination light source and control device, just open when making red illumination light source only on the travel path that ruddiness photic zone is arranged at the red illumination light that red illumination light source produces by the control of control device, just open when blue-light excited light source is only on the travel path that blue light photic zone and other color of light transition zones are arranged at the blue-light excited light that blue-light excited light source produces.When the wavelength-converting region on Wavelength converter and photic zone adjustment, filtering apparatus 107 carries out corresponding configuration with the corresponding filter area of the stimulated luminescence of the different colours from Wavelength converter 106 outgoing with the color of Stimulated Light then produced according to the wavelength-converting region on Wavelength converter 106 from the exciting light of Wavelength converter 106 transmission or balance photic zone corresponding to illumination light or filter area and the number of photic zone, and the present invention is not restricted this.
Refer to Fig. 4, Fig. 4 is the structural representation of the second embodiment of light supply apparatus of the present invention.The light supply apparatus 400 of the present embodiment mainly comprises exciting light sources 401, rotation axis 403, first light collecting device 405, Wavelength converter 407, filtering apparatus 409, drive unit 411, lens 413 and light directing arrangement 415.
The light supply apparatus 400 of the present embodiment is with the difference of the light supply apparatus 100 shown in Fig. 1, and Wavelength converter 407 is set to reflective, and namely the light path of exciting light and Stimulated Light is positioned at the same side of Wavelength converter 407.Reflective Wavelength converter compares the Wavelength converter of the transmission-type in Fig. 1, than being easier in manufacture craft.By dorsad at Wavelength converter 407 being coated with reflection horizon and realizing to make the side outgoing from Wavelength converter 407 towards exciting light of Stimulated Light and exciting light in the side of exciting light, this is known technology, does not repeat them here.Light directing arrangement 415 directs excitation light enters Wavelength converter 407 through the first light collecting device 405, and the light of guide wavelength conversion equipment 407 outgoing is from another light path outgoing of light path being different from exciting light.
In the course of work of the light supply apparatus 400 shown in Fig. 4, the exciting light that light source 401 produces incides on the light directing arrangement 415 in the light path being positioned at filtering apparatus 409 outgoing Stimulated Light.In the present embodiment, light directing arrangement is optical filter 415.Optical filter 415 relative to the incident direction of exciting light and the exit direction of Stimulated Light all in 45 degree of settings, for reflected excitation light and transmission Stimulated Light.Under the reflex of optical filter 415, the direction of propagation of exciting light rotates 90 degree, is incident to filtering apparatus 409.Compare the filtering apparatus in the light supply apparatus 100 shown in Fig. 1, each filter area of filtering apparatus 409 is also set to transmission exciting light.Exciting light is collected through the first light collecting device 405 and is incident to Wavelength converter 407 after filtering apparatus 409 transmission.The Stimulated Light that Wavelength converter 407 produces is incident to filtering apparatus 409 after the first light collecting device 405 is collected, after filtering apparatus 409 filters, be incident to lens 413, through Stimulated Light transmission filter mating plate 415 outgoing that lens 413 are collected.
In the present embodiment, because Wavelength converter 407 is set to reflective, the light path part of exciting light and Stimulated Light overlaps, and makes the structure of light supply apparatus compacter.
In the present embodiment, light directing arrangement 415 also can be the reflex housing with light hole.Then corresponding, exciting light is transmitted through filtering apparatus 409 from the light hole of reflex housing, and is incident to Wavelength converter 407 through the first light collecting device 405 after filtering apparatus 409 transmission.And the light of Wavelength converter 407 outgoing successively through first light collecting device 405 collect and filtering apparatus 409 filtration after collected by reflex housing after from the light path outgoing different from exciting light input path.
Refer to Fig. 5, Fig. 5 is the structural representation of the 3rd embodiment of light supply apparatus of the present invention.The light supply apparatus 500 of the present embodiment mainly comprises exciting light sources 501, rotation axis 503, first optical module 505, Wavelength converter 507, filtering apparatus 509, drive unit 511, lens 513 and light directing arrangement 515.
In the present embodiment, the first optical module 505 can be lens or lens combination.Preferably, the first optical module 505 comprises reflective optical collector, and because the volume of lens combination is comparatively large, and light path is longer, and the small volume of reflective optical collector, the more compact structure of light supply apparatus can be made less.This reflective optical collector 505 has two ports, is respectively used to light beam L2 that the is incident and outgoing of outgoing Wavelength converter.For convenience of description, hereafter the entry port of indication refers to the port for incident beam L2, and exit ports refers to the port for outgoing beam L2.Wherein the area of entry port is less than the area of exit ports.Because the Stimulated Light approximate Lambertian of Wavelength converter 507 outgoing distributes, and the blue excitation light scattering outgoing that corresponding blue excitation light on Wavelength converter 507 and the blue light reflective areas arranged are reflected, dispersion angle is comparatively large, make light beam L2 after the entry port incidence of this reflective optical collector 505 can therein after anti-raw multiple reflections from exit ports outgoing.
Reflective optical collector 505 can be excellent, the hollow or solid compound condenser etc. of solid or hollow tapered light, the principle that wherein solid reflective optical collector mainly utilizes light beam wall to occur to be totally reflected within it is to make light beam multiple reflections therein, and hollow reflective optical collector mainly utilizes the reflection horizon that within it wall is arranged to make light beam multiple reflections therein.Because the area of reflective optical collector to the entry port of light beam L2 is less than the area of exit ports, according to optical extend conservation known light beam L2 at the optical axis being approximately parallel to this reflective optical collector 505 when the exit ports place of reflective optical collector 505, to reach the object of collimated light beam, this is less than the distance with entry port near referring to the distance of the exit ports of reflective optical collector 505.When the exit ports of light beam L2 and reflective optical collector 505 distance more hour, the effect of collimation is better.In the present embodiment, reflective optical collector 505 is hollow.
The light supply apparatus 500 of the present embodiment is with the difference of the light supply apparatus 400 shown in Fig. 4, in light supply apparatus shown in Fig. 4, the light directing arrangement 415 of 400 is positioned in the light path of transmission outgoing Stimulated Light of filtering apparatus 409, and the light directing arrangement 515 in the light supply apparatus 500 shown in Fig. 5 is positioned at reflective optical collector 505; And the surface of reflective optical collector 505 is provided with light hole, for transmission exciting light sources 501 produce exciting light L1 to light directing arrangement 515.By making a call to a duck eye to form light hole on the surface of reflective optical collector 505.In the present embodiment, light directing arrangement 515 is optical filter.
In the course of work of the light supply apparatus 500 shown in Fig. 5, exciting light L1 passes the light hole on reflective optical collector 505 and is incident on the optical filter 515 in reflective optical collector 505, and reflexes to Wavelength converter 507 through this optical filter 515.The light L2 of Wavelength converter 507 outgoing is collected and transmission filter mating plate 515 by reflective optical collector 505, is incident to filtering apparatus 509, outgoing after filtering apparatus 509 filters.
As shown in Figure 6, Fig. 6 is an embodiment of the optical filtering curve of optical filter 515, the optical filtering curve that wherein optical filtering curve 601 is the incident angles of the incident light being incident in optical filter 515 when being the first predetermined angle, the optical filtering curve that optical filtering curve 603 is the incident angles of the incident light being incident in optical filter 515 when being the second predetermined angle, wherein the second predetermined angle is greater than the first predetermined angle.As can be seen from Figure, when the incident angle of the incident light being incident in optical filter 515 increases, optical filtering curve drifts about toward shortwave direction.By the design of the optical filtering curve to optical filter 515, the wavelength coverage of exciting light is made to be positioned at the range of drift of optical filtering curve, to make exciting light be reflected for during incident angle incidence optical filter 515 to be less than or equal to the first predetermined angle, to be more than or equal to the second predetermined angle for transmission during incident angle incidence optical filter 515.
Concrete example.As shown in Figure 7, Fig. 7 is the light path schematic diagram in reflective optical collector 505 in the light supply apparatus shown in Fig. 5.Optical filter 515 is positioned at the exit ports place near reflective optical collector 505, because the light L2 in this place's Wavelength converter 507 outgoing is close to the optical axis being parallel to reflective optical collector 505, the angles of optical filter 515 can be arranged so that light beam L2 is incident in optical filter 515 with the incident angle being more than or equal to 30 degree.Meanwhile, the incident angle of adjustment exciting light L1, makes exciting light L1 be incident on optical filter 515 with the incident angle being less than or equal to 10 degree, reflexes to Wavelength converter 507 through optical filter 515.Light beam L2 after multiple reflections, when arriving at optical filter 515, due to angle drift characteristic, makes the exciting light in light beam L2 can transmission filter 515 in reflective optical collector 505.And the wavelength coverage of Stimulated Light is because being greater than the wavelength coverage of exciting light and then equal transmissive optical filter 515.
In the present embodiment, the incident angle that light L2 due to Wavelength converter outgoing is incident in optical filter 515 is larger, and the incident angle being incident in the exciting light L1 of optical filter 515 is less, make this optical filter that angle drift characteristic can be utilized to carry out reflected excitation light L1 and the light L2 of transmission peak wavelength conversion equipment 507 outgoing, to make the blue excitation light also transmissive filtration mating plate 515 in the light L2 of Wavelength converter 507 outgoing.Therefore, in the present embodiment, Wavelength converter 507 can arrange blue light reflective areas, and filtering apparatus 509 be arranged corresponding blue light filter area, to make the blue sequential light of light supply apparatus outgoing.And in the light supply apparatus shown in Fig. 4, due to optical filter 415 reflect blue, make blue light can not from outgoing the light path of Stimulated Light outgoing, therefore when the light supply apparatus shown in Fig. 4 uses blue excitation light, Wavelength converter can not arrange blue light reflective areas, make light supply apparatus can not the blue sequential light of outgoing.In the present embodiment, optical filter 507 also can distinguish the light path of the light of exciting light and Wavelength converter outgoing by the angle drift degree difference of optical filter to different polarized lights.As shown in Figure 8, Fig. 8 is another embodiment of the optical filtering curve of optical filter 515 in the light supply apparatus shown in Fig. 5.In the present embodiment, exciting light sources is LASER Light Source, be polarized light by exciting light and the light of Wavelength converter outgoing is nonpolarized light, and along with the increase of angle, the characteristic that the optical filtering curve of polaroid drifts about toward shortwave direction carries out differentiation light path to this two-beam road.Be described as follows.
P polarized light is the polarized light of polarization direction in the plane that incident direction and reflection direction are formed, the polarized light of the plane that s polarized light is formed perpendicular to incident direction and reflection direction for polarization direction.When the incident angle that the light comprising p polarized light and s polarized light is incident in optical filter increases, due to the effect of the rete of optical filter, optical filter can drift about to shortwave direction to the stopband of light, and the stopband of p polarized light can become narrower than the stopband of s polarized light, the transmittance curve passband edge making p polarized light corresponding with s polarized light staggers certain distance.Along with the incident angle being incident in optical filter is larger, the stopband of p polarized light differs with the resistance band of s polarized light and becomes large, and the distance of the transmittance curve passband edge that p polarized light is corresponding with s polarized light is larger.The wavelength corresponding to position that p polarized light and the transmittance curve passband edge corresponding to s polarized light stagger, can be changed by rete design.Therefore, in the present embodiment, exciting light sources 501 is LASER Light Source, because LASER Light Source is polarized light, make exciting light be incident in optical filter 507 with s polarized light, and the wavelength coverage corresponding to position that the s polarized light of optical filter 507 and the transmittance curve passband edge corresponding to p polarized light are staggered is the wavelength coverage of the laser of LASER Light Source 501 outgoing.
As shown in Figure 8, the optical filtering curve P1 in Fig. 8 is the optical filtering curves of optical filter 507 pairs of p polarized lights when incident angle is the first angle.Optical filtering curve P2 is optical filter 507 pairs of p polarized lights after relative first angle of incident angle increases, and is optical filtering curve during the second angle, its relatively optical filtering curve P1 drift about toward shortwave direction.Optical filtering curve S 1 is the optical filtering curves of optical filter 507 pairs of s polarized lights when incident angle is the first angle.Optical filtering curve S 2 is optical filter 507 pairs of s polarized lights after relative first angle of incident angle increases, and be optical filtering curve during the second angle, its optical filtering curve S relatively 1 is drifted about toward shortwave direction.And the spectrum of exciting light is positioned at the stopband of optical filtering curve S 1 and is positioned at the passband of optical filtering curve S 2, P1 and P2 simultaneously, therefore, exciting light with the incident optical filter 507 of the angle being less than or equal to the first angle, and is reflected onto Wavelength converter 507.And the light of Wavelength converter 507 outgoing comprises Stimulated Light and exciting light, all be incident in optical filter 507 to be more than or equal to the second angle, wavelength coverage due to Stimulated Light is greater than the wavelength coverage of exciting light, therefore transmissive filters mating plate 507, and the exciting light of Wavelength converter 507 outgoing is owing to being incident in optical filter 507 to be more than or equal to the second angle, therefore the passband after the optical filtering curves shift of optical filter is positioned at, and then transmission filter mating plate 507.
Compare and come to distinguish light path to light beam L1 and light beam L2 by the angle drift characteristic of optical filter, distinguished the light path of light beam L1 and light beam L2 by the angle drift degree difference of optical filter to different polarized lights in the present embodiment, because light path is reversible, in the former, the part exciting light that light path along exciting light L1 incidence returns optical filter 515 through light hole and outgoing, can cause part light loss.And in the present embodiment, light path along exciting light L1 incidence returns in the part exciting light of optical filter 515 and comprises p polarized light and s polarized light, and the s polarized light in this part exciting light of optical filter 515 reflection, transmission p polarized light, make to only have s polarized light to be wasted in this part exciting light, p polarized light is not wasted, and therefore light loss is less.
In the present embodiment, light directing arrangement 507 can be also catoptron, compares optical filter, and the cost of catoptron is lower.Catoptron is positioned on the part emitting light path of the light L2 of Wavelength converter outgoing.As shown in Figure 9, Fig. 9 is another embodiment of reflective optical collector in the light supply apparatus shown in Fig. 5.In the present embodiment, exciting light sources is LASER Light Source, carries out differentiation light path by exciting light from the different of optical extend of the emergent light of Wavelength converter to this two-beam.Because the optical extend of laser is less, and the optical extend of the light of Wavelength converter 507 outgoing is larger, by placing catoptron 915, exciting light is reflexed to Wavelength converter 507, and the light of Wavelength converter 507 outgoing is transmitted through filtering apparatus from the medium around this catoptron 915.And the part light reflected by catoptron 915 in the light of Wavelength converter 507 outgoing is final from the outgoing of reflective optical collector 505 after interreflection in reflective optical collector 505.
In the present embodiment, catoptron 915 also can be placed on the emitting light path of filtering apparatus, on the position of the optical filter 415 in the light supply apparatus namely shown in Fig. 4.Compare the light supply apparatus shown in Fig. 4, catoptron 915 is placed on the position of the optical filter 415 in the light supply apparatus shown in Fig. 4 by this enforcement, because the optical extend of the light beam L2 through filtering apparatus transmission is larger, and the area of catoptron 915 is less, the blue excitation light making considerable part also can from around the medium transmission outgoing around catoptron 915, and then can the blue sequential light of outgoing.
But compare position catoptron 915 being placed on the optical filter 415 in the light supply apparatus shown in Fig. 4, in the light supply apparatus shown in Fig. 4, each filter area due to filtering apparatus 409 all needs to be set to transmission exciting light, when other sections except blue light reflective areas in Wavelength converter 407 are positioned in the input path of exciting light, such as green glow transition zone, do not absorbed by Wavelength converter 407 owing to there being part blue excitation light, therefore the mixed light L2 of the green Stimulated Light of Wavelength converter 407 meeting outgoing and blue excitation light, and filtering apparatus 409 transmit blue, catoptron 815 can only reflect the mixed light L2 of seldom part, some blue light can be mixed in the green glow of therefore final outgoing, this causes color saturation in the light of outgoing not enough.And in the present embodiment, because exciting light does not need transmission filter electro-optical device 509, therefore reflection blue exciting light can be all set at filtering apparatus 409 except on other filter areas of blue light filter area, to only transmit required color, avoid mixing in required color exciting light that part do not absorb by Wavelength converter 507 and the problem of color saturation deficiency that causes.Therefore, requiring higher occasion to color saturation, catoptron can be selected to be placed in reflective optical collector.
In the present embodiment, reflective optical collector also can be solid.Comparing hollow reflective optical collector utilizes the reflection horizon of going up to reflect to make light beam therein, because solid reflective optical collector utilizes the principle of light beam anti-raw total reflection therein to make the even light of light beam and collimation, light utilization ratio can be made higher, and light loss is less.Corresponding, light hole can be plate filter coating at surface one place of reflective optical collector, reflects Stimulated Light for transmission exciting light.Can by reflective optical collector with the optical filter 515 shown in Fig. 5 for separatrix is divided into two parts, when being grouped together by these two parts, between these two parts, the position of optical filter 515 plates filter coating.Further, filter coating also can be replaced by air-gap.Packing ring can be placed when above-mentioned two parts of combined reflected formula optical collector on this combination part, make to occur air-gap in the middle of these two parts.But unlike, the angles of air-gap in reflective optical collector is different from the optical filter in the light supply apparatus shown in Fig. 5.Below illustrate.
When arranging air-gap, principle relies on the exciting light of incidence reflection formula optical collector to incide on air-gap with the angle being greater than critical angle, to be totally reflected on this air-gap, and then is reflected onto Wavelength converter 507.And the light L2 of Wavelength converter outgoing is incident to this air-gap with the angle being less than critical angle and this air-gap of transmission.Due to the light L2 of Wavelength converter outgoing when near the exit ports place of reflective optical collector close to the optical axis of this reflective optical collector parallel, dispersion angle is less, therefore, air-gap is preferably arranged on the exit ports place near reflective optical collector, and makes the angle of the optical axis of air-gap and reflective optical collector larger.
In the present embodiment, when exciting light is laser, air-gap also can arrange less, comes to distinguish light path to the light of exciting light and Wavelength converter outgoing with the difference of the optical extend utilizing the light of laser and Wavelength converter outgoing.Exciting light incides on air-gap and is totally reflected, and is reflected onto Wavelength converter.The light of Wavelength converter outgoing is transmitted through filtering apparatus from the medium around this air-gap.
In the present embodiment, light directing arrangement also can be placed on outside reflective optical collector, between reflective optical collector and filtering apparatus.Accordingly, without the need to arranging light hole on the surface of reflective optical collector.But compare above embodiment, the volume of the light supply apparatus in this scheme needs larger, and because the distance of reflective optical collector and filtering apparatus is farther, the light beam being incident in filtering apparatus after making reflective optical collector outgoing after light directing arrangement is dispersed more, causes segment beam do not enter filtering apparatus and lose.
In the present embodiment, the light L2 of Wavelength converter 507 outgoing is when entering the entry port place of reflective optical collector, and the light utilization efficiency of light loss light supply apparatus is more at least higher.The one side claiming light beam L2 to be incident in entry port is incidence surface, find through experiment, when the area of incidence surface is not less than the area of the hot spot on Wavelength converter 507, when the ratio D of the external diameter of a circle at the hot spot place on the hot spot on Wavelength converter 507 and the distance of incidence surface and Wavelength converter 507 is larger, larger in the light loss at the entry port place of reflective optical collector.As shown in Figure 10, Figure 10 is Wavelength converter 507 and the reflective coupling efficiency of optical collector 505 and the graph of a relation of ratio D.Transverse axis in figure is the ratio of hot spot on Wavelength converter 507 and the distance of incidence surface and the external diameter of a circle at hot spot place, the longitudinal axis is the coupling efficiency of Wavelength converter 507 and reflective optical collector 505, this coupling efficiency is higher, then light loss is fewer.Preferably, ratio D is not more than 0.025, is not less than 95.9% to make coupling efficiency.Certainly, be not very high occasion to the brightness requirement of light source, ratio D can be also other numerical value, as being not more than 0.06, is not less than 90% to make coupling efficiency.
Refer to Figure 11, Figure 11 is the structural representation of the 4th embodiment of light supply apparatus of the present invention.The light supply apparatus 1100 of the present embodiment mainly comprises exciting light sources 1101, cogwheel gearing 1102, optical module, Wavelength converter 1106, filtering apparatus 1107, drive unit 1108.
The light supply apparatus 1100 of the present embodiment is with the difference of the light supply apparatus 100 shown in Fig. 1, and what be connected with both filtering apparatus 1107 by Wavelength converter 1106 is cogwheel gearing 1102.Cogwheel gearing 1106 is mechanical driving devices of the present embodiment light supply apparatus 1100.
In the light supply apparatus 1100 of the present embodiment, cogwheel gearing 1106 comprises two gears of mutual Vertical Meshing, and this gear hub is made by light transmissive material.Wavelength converter 1106 and filtering apparatus 1107 are fixed to the axle center of two gears of cogwheel gearing 1102 respectively; Wavelength converter 1106 is mutually vertical with filtering apparatus 1107.
Optical module comprises the second light collecting device 1103, catoptron 1104 and beam condensing unit 1105.
In the course of work of the light supply apparatus 1100 shown in Figure 11, the exciting light that exciting light sources 1101 produces incides on Wavelength converter 1106.Wavelength converter 1106 and filtering apparatus 1107 by cogwheel gearing synchronous axial system under the driving of drive unit, and then make each filter area synchronous axial system on each wavelength-converting region on Wavelength converter 1106 and filtering apparatus.Each wavelength-converting region stimulated luminescence of Wavelength converter 1106 excites, change the stimulated luminescence of also transmission different colours.After the second light collecting device 1103, catoptron 1104 and beam condensing unit 1105 are guided, filtering apparatus 1107 is incided by the stimulated luminescence of the different colours of Wavelength converter 1106 transmission.
Second light collecting device 1103 and beam condensing unit 1105 are respectively used to collect and optically focused the Stimulated Light of Wavelength converter 1106 transmission, to reduce the angle of divergence of Stimulated Light.Second light collecting device 1103, beam condensing unit 1105 can be all lens, solid or hollow tapered light rod, lens combination, or solid or hollow compound condenser.
Catoptron 1104 for reflecting Stimulated Light, to change the direction of propagation of Stimulated Light.In the present embodiment, catoptron 1104 is 45 degree of settings relative to the incident direction of Stimulated Light.In the present embodiment, under the reflex of catoptron 204, the direction of propagation of Stimulated Light rotates 90 degree, is incident on filtering apparatus 1107.Now, due to the mutually vertical and synchronous axial system of Wavelength converter 1106 and filtering apparatus 1107, it is hereby ensured that the Stimulated Light of the different colours produced by each wavelength-converting region of Wavelength converter 1106 incides on the filter area of the same color on filtering apparatus 1107 after the reflection of catoptron 1104, and then carry out optical filtering to improve excitation by the filter area of same color.
In the present embodiment light supply apparatus, the catoptron 1104 in optical module is used for changing the direction of propagation of Stimulated Light, actually uses, and can also come the direction of propagation of other change Stimulated Light, as prism, curved reflector etc. by selectors.When selecting curved reflector to change the direction of propagation of Stimulated Light, curved reflector itself possesses the characteristic of optically focused, and beam condensing unit 1105 just need not be adopted in light supply apparatus again to carry out optically focused.
When Wavelength converter also comprises exciting light photic zone, this exciting light photic zone is arranged on the travel path of exciting light at the driving periodical of drive unit, this exciting light photic zone transmission exciting light.Now, filtering apparatus also comprises the balance photic zone that arrange corresponding to exciting light photic zone or exciting light filter area.Optical module is also for guiding the exciting light from exciting light photic zone to incide balance photic zone or exciting light filter area, and balance photic zone or exciting light transmission area are respectively used to filter and transmission this exciting light.
In addition, when utilizing cogwheel gearing as mechanical driving device, gear in cogwheel gearing in the present embodiment light supply apparatus can select the ring texture of hollow, and Wavelength converter and filtering apparatus are fixed with each gear with hollow annular structure is concentric respectively; Now, Wavelength converter and filtering apparatus are equivalent to the wheel hub of gear, do not require that gear possesses light transmission features.Except the gear of two Vertical Meshing in the present embodiment light supply apparatus, two can be selected as required in other angle meshed gears as cogwheel gearing; Or select to be greater than gear set that two adjacent gear are engaged with each other as cogwheel gearing.During mechanical driving device conversion, as guiding the optical module of stimulated luminescence also to need to adjust, the present invention does not limit this.
In the present embodiment, Wavelength converter also can be set to reflective, to make the structure of whole light supply apparatus compacter.Corresponding, catoptron 1104 replaces with optical filter, and exciting light sources is positioned at the side of optical filter Wavelength converter dorsad.Optical filter is used for transmission exciting light and reflects Stimulated Light to filtering apparatus to Wavelength converter.Or catoptron 1104 also can replace with the reflex housing with light hole, exciting light sources is positioned at the side of optical filter Wavelength converter dorsad.The exciting light that exciting light sources produces is through light hole to Wavelength converter, and this reflex housing is used for the light of Wavelength converter outgoing to reflex to filtering apparatus.
Except the cogwheel gearing 1102 in transmission shaft 102, second embodiment in the first embodiment of said light source device; everyly both light wavelength conversion device and filtering apparatus can be coupled together and under the driving of same drive unit, make all mechanical driving devices that the two is synchronized with the movement all in protection scope of the present invention, such as mechanical driving device can also be driving belt etc.
Instructions of the present invention has enumerated Wavelength converter and filtering apparatus example arranged in parallel in the first embodiment of light supply apparatus, has enumerated Wavelength converter and the mutual vertically disposed example of filtering apparatus in the second embodiment of light supply apparatus.Except the relative position relation of the Wavelength converter enumerated in above two kinds of examples and filtering apparatus, in practical application, those skilled in the art can also adjust according to the relative position of actual conditions to Wavelength converter and filtering apparatus, as long as guarantee that the wavelength-converting region of the same color of Wavelength converter is synchronous with the filter area of the same color of filtering apparatus.
First embodiment of light supply apparatus of the present invention and the Wavelength converter of the second embodiment and filtering apparatus all move in a circle, in addition, Wavelength converter and the filtering apparatus of light supply apparatus also can be mutually coaxially nested and spaced cylinder, or the Wavelength converter of light supply apparatus and filtering apparatus also can be parallel to each other or the movable plate of vertical or in a certain angle mutual setting mutually.This Wavelength converter comprises at least first wave length transition zone, and this filtering apparatus comprises at least the first filter area.The Wavelength converter of this cylinder shape or mobile tabular is connected by mechanical driving device with filtering apparatus, and drive unit driving device gearing, Wavelength converter and filtering apparatus thrin, make the first wave length transition zone of Wavelength converter and the first filter area synchronous axial system or movement of filtering apparatus.The stimulated luminescence of the first wave length transition zone from Wavelength converter is guided to the first filter area of filtering apparatus by optical element.Further, before stimulated luminescence arrives filtering apparatus, light supply apparatus also comprises the light collecting device be arranged on stimulated luminescence travel path.
In sum, filtering apparatus in light supply apparatus of the present invention is connected by mechanical driving device with Wavelength converter, and drive filtering apparatus, Wavelength converter or mechanical driving device thrin by same drive unit, the filter area of the wavelength-converting region of the same color of Wavelength converter and the same color of filtering apparatus is synchronized with the movement, has and be easy to realize Wavelength converter and filtering apparatus is synchronized with the movement and synchronism advantages of higher.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (13)
1. a light supply apparatus, comprising:
Exciting light sources, for generation of an exciting light;
Filtering apparatus, comprises the first filter area; And
Drive unit, is characterized in that, also comprises:
Wavelength converter, described Wavelength converter comprises at least first wave length transition zone;
Described first filter area is at least corresponding with first wave length transition zone to be arranged;
Mechanical driving device, links together Wavelength converter and filtering apparatus;
Described drive unit is for driving described Wavelength converter, described filtering apparatus and mechanical driving device thrin, be synchronized with the movement to make described first wave length transition zone and described first filter area, and described wavelength-converting region is periodically arranged on the travel path of described exciting light, and then converts described excitation wavelength to Stimulated Light;
First optical module, incide described first filter area for guiding described Stimulated Light, described first filter area filters described Stimulated Light, to improve the excitation of described Stimulated Light.
2. light supply apparatus according to claim 1, it is characterized in that, described first optical module comprises the first light collecting device be arranged between Wavelength converter and filtering apparatus, first light collecting device collects described Stimulated Light, and makes the incident angle the inciding described filtering apparatus energy be less than or equal within the scope of 60 degree of described Stimulated Light account for more than 90% of gross energy.
3. light supply apparatus according to claim 2, is characterized in that, described first light collecting device makes the incident angle the inciding described filtering apparatus energy be less than or equal within the scope of 30 degree of described Stimulated Light account for more than 90% of gross energy.
4. light supply apparatus according to claim 1, is characterized in that, described mechanical driving device is transmission shaft, and described Wavelength converter and described filtering apparatus interval are fixed on transmission shaft.
5. light supply apparatus according to claim 1, is characterized in that, described mechanical driving device is cogwheel gearing, and described cogwheel gearing comprises two pitch wheels; Described Wavelength converter and described filtering apparatus are fixed to the axle center of described two gears respectively.
6. light supply apparatus according to claim 1, it is characterized in that, described Wavelength converter is reflective, described light supply apparatus also comprises light directing arrangement, for guiding described exciting light to enter described Wavelength converter through described first optical module, and guide described Stimulated Light from another light path outgoing of emitting light path being different from described exciting light.
7. light supply apparatus according to claim 6, is characterized in that, described light directing arrangement is also for guiding the exciting light and described Stimulated Light that are not absorbed by described Wavelength converter with same light path outgoing.
8. the light supply apparatus according to claim 6 or 7, is characterized in that, described first optical module comprises reflective optical collector, and described light directing arrangement is positioned at this reflective optical collector;
The surface of this reflective optical collector comprises light hole, for guiding described exciting light to described light directing arrangement;
Described light directing arrangement for reflecting exciting light from light hole to described Wavelength converter, and for transmission from the light after this Wavelength converter outgoing.
9. light supply apparatus according to claim 8, it is characterized in that, described light directing arrangement is optical filter, this optical filter is arranged at the one end near described filtering apparatus in described reflective optical collector, described exciting light is to be reflected onto described Wavelength converter after the angle being less than the first predetermined angle this optical filter incident, the light of described Wavelength converter outgoing is to be transmitted through described filtering apparatus after the angle being greater than the second predetermined angle this optical filter incident, and wherein the first predetermined angle is less than the second predetermined angle.
10. light supply apparatus according to claim 8, it is characterized in that, described light directing arrangement is catoptron, this catoptron is positioned on the part emitting light path of the light of described Wavelength converter outgoing, for reflecting the exciting light extremely described Wavelength converter from light hole, the light of described Wavelength converter outgoing is transmitted through described filtering apparatus from the medium around this catoptron.
11. light supply apparatuses according to claim 8, it is characterized in that, described light directing arrangement is air-gap, this air-gap is arranged at the one end near described filtering apparatus in described reflective optical collector, described exciting light is incident to this air-gap and total reflection extremely described Wavelength converter through light hole, and the light of described Wavelength converter outgoing is transmitted through described filtering apparatus from this air-gap or around the medium of this air-gap.
12. light supply apparatuses according to claim 1, is characterized in that, described first optical module comprises reflective optical collector, and this reflective optical collector includes reflective surface, and the area of this incidence surface is not less than the area of the hot spot on described Wavelength converter;
The ratio of the distance of described incidence surface and described hot spot and the external diameter of a circle at described hot spot place is not more than 0.025.
13. 1 kinds of projection arrangements, is characterized in that, comprise the light supply apparatus as described in claim 1 ~ 12.
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| CN201210289553.4A CN102937773B (en) | 2011-12-02 | 2012-08-15 | Light source device and projecting device using same |
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| CN201110396340.7 | 2011-12-02 | ||
| CN2011103963407A CN102520569A (en) | 2011-12-02 | 2011-12-02 | Light source device and projection device using same |
| CN201210289553.4A CN102937773B (en) | 2011-12-02 | 2012-08-15 | Light source device and projecting device using same |
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| CN102937773B true CN102937773B (en) | 2015-04-29 |
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| CN201210289553.4A Active CN102937773B (en) | 2011-12-02 | 2012-08-15 | Light source device and projecting device using same |
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| CN102937773A (en) | 2013-02-20 |
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