CN107797296A - A kind of attenuator, LASER Light Source and laser projection device - Google Patents
A kind of attenuator, LASER Light Source and laser projection device Download PDFInfo
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- CN107797296A CN107797296A CN201711123108.XA CN201711123108A CN107797296A CN 107797296 A CN107797296 A CN 107797296A CN 201711123108 A CN201711123108 A CN 201711123108A CN 107797296 A CN107797296 A CN 107797296A
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0927—Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0977—Reflective elements
- G02B27/0983—Reflective elements being curved
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Microscoopes, Condenser (AREA)
Abstract
It is of the invention to disclose a kind of attenuator, LASER Light Source and laser projection device in fact, attenuator is used as by the use of concave mirror and convex reflecting mirror, utilize the concave mirror being arranged at light source light extraction, the collimated light beam that light source is sent reflexes to convex reflecting mirror and the light beam is focused, then, using the convex reflecting mirror for being arranged on concave mirror light direction, by the concave mirror to the conversion light path to rear end is collimated and exported to the light beam of reception.It is above-mentioned that collimation shrink beam is carried out to the light beam that light source is launched using concave mirror and convex reflecting mirror, because reflection type structure will not carry out the reflection of different refractivity to light beam because of the difference of wave-length coverage, so as to advantageously ensure that the uniformity of polychromatic source beam shaping；Meanwhile mirror structure can set radiator structure in its non-reflecting surface, realize the Homogeneouslly-radiating to reflection mirror component, and then can mitigate optical component because of influence of the heat accumulation to optical property.
Description
Technical field
The present invention relates to technical field of laser display, more particularly to a kind of attenuator, LASER Light Source and laser projection to set
It is standby.
Background technology
Laser is a kind of high brightness, high directivity, the light source for sending monochromatic coherent light beam, and LASER Light Source is as a kind of excellent
Coherent source, have that monochromaticjty is good, high directivity, the advantages that luminous flux is high, in recent years gradually as light source applications in projection
Display technology field.
In order to realize that the high brightness of laser projection device exports, the laser of the multiple laser aid composition module types of generally use
Device is as light source.Certain space interval is arranged with due to each laser aid in laser module, especially when multiple laser fill
When putting arrangement, total spot size of laser emitting can be caused larger, therefore the laser generally in laser and rear end converts light
Increase focusing arrangement between road and carry out the light beam that convergent laser device is launched.At present, mainly there is the implementation of two kinds of shrink beams, it is a kind of
It is the form of reverberation bowl, another kind is coaxial telescopic system.Convergence is blocked because reverberation bowl formula light-source system has laser
Light path, the problems such as laser radiating is influenceed, so the coaxial telescopic system of generally use carries out light beam shrink beam at present.Fig. 1 is to adopt
With the basic structure schematic diagram of the laser source system of telescope shrink beam.As described in Figure 1, the system includes laser group 10, hoped
Remote mirror attenuator 20 and laser conversion light path 30, wherein, telescope attenuator 20 is recessed by a convex lens and one
Microscope group into.Transmission path in the optical system of laser in Fig. 1 is as described below：The laser beam launched from laser is through beyond one's expectations
Two lens of remote mirror attenuator 20 reach laser conversion light path 30 after assembling collimation, then, light path 30 are converted using laser
In dichroscope 301 transmit after laser beam reach the light beam of the outgoing of line focus collimation lens set 302 and get to fluorescent wheel 303
Fluorescent wheel is excited to send fluorescence on (by taking reflection-type fluorescent wheel as an example), fluorescent wheel 103 is poly- by fluorescent reflection, the fluorescence process of reflection
Focus collimation lens group 302 receives light, enters line convergence collimation for parallel or less parallel beam exit to dichroscope 301, dichroic
Mirror 301 goes out the fluorescent reflection, meanwhile, by the laser beam of fluorescent wheel projection, by primary colours light circuit 304, (such as blue light returns
Road) and dichroscope 301 transmit away；Finally, the fluorescence and laser being emitted from dichroscope 301 form white light after closing, to carry
For illumination.
Because the lens material in above-mentioned telescope attenuator 20 is different to the refractive index of different wave length light beam, therefore,
The purpose that different telescopic lenses materials need to be used to reach shrink beam for the laser beam of different wave length is needed, especially, is being swashed
Light device group 10 launch for multi-wavelength beam when, the telescope attenuator 20 in collimation and is difficult to each wave band during shrink beam
Light beam carries out consistent processing.Further, since the radiator structure of the lens in telescope attenuator 20 is to be arranged at lens side
Edge picture frame metal material, therefore, the thermograde of whole lens can be caused larger, the refractive index and airspace for making lens occur
Deviation, the performance of lens is deteriorated, be more unable to reach the purpose of effective shrink beam collimation.
The content of the invention
The embodiments of the invention provide a kind of attenuator, LASER Light Source and laser projection device, to solve LASER Light Source
In telescope attenuator shrink beam collimating effect difference the problem of.
A kind of first aspect implemented according to the present invention, there is provided attenuator, it is characterised in that the attenuator bag
Concave mirror and convex reflecting mirror are included, wherein：
The directional light that the concave mirror is used to send light source converges to the convex reflecting mirror；
The radius of curvature of the convex reflecting mirror is less than the radius of curvature of the concave mirror, for the concave surface is anti-
The light beam for penetrating mirror reflection carries out collimation and forms directional light.
The second aspect implemented according to the present invention, there is provided a kind of LASER Light Source, the LASER Light Source include the present invention first
Attenuator described in aspect, in addition to the laser group and laser conversion light path of laser are sent, wherein：
Concave mirror in the attenuator is used to the light beam that the laser group is sent converging to the convex surface
Speculum；
Convex reflecting mirror in the attenuator is used to be collimated the light beam that the concave mirror reflects, and is formed
Parallel or less parallel light beam；
The laser conversion light path is used to receive the light beam after the attenuator shrink beam and collimation.
The third aspect according to embodiments of the present invention, there is provided a kind of laser projection device, including ray machine, camera lens and
LASER Light Source as described in respect of the second aspect of the invention；
Described LASER Light Source provides illumination for the ray machine, and the ray machine is modulated to light beam of light source, and exports extremely
The camera lens is imaged, and is projected to projection medium and is formed projected picture.
From above technical scheme, a kind of attenuator, LASER Light Source and laser projection provided in an embodiment of the present invention
Equipment, first, using the concave mirror being arranged at light source light extraction, the directional light that light source is sent reflexes to convex reflecting mirror
And the light beam is focused, the shrink beam effect of light beam is realized, then, utilizes the convex surface for being arranged on concave mirror light direction
Speculum, by the concave mirror reflected light carry out collimation formed directional light and export to rear end laser convert light path.Profit
The attenuator formed with above-mentioned concave mirror and convex reflecting mirror, it is possible to achieve flat to being sent as the laser of light source
Row light beam carries out shrink beam, because reflection type structure will not carry out the saturating of different refractivity because of the difference of wave-length coverage to light beam
Penetrate, so as to advantageously ensure that the uniformity of polychromatic source beam shaping；Meanwhile mirror structure can be set in its non-reflecting surface
Radiator structure is put, is realized to the Homogeneouslly-radiating to reflection mirror component, mitigates optical component because of influence of the heat accumulation to optical property,
And then can obtain space coincidence degree it is higher, distribution than more uniform beam and focus.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the basic structure schematic diagram of the laser source system using telescope shrink beam in the prior art；
Fig. 2 is a kind of basic structure schematic diagram of attenuator provided in an embodiment of the present invention；
Fig. 3 is a kind of basic structure schematic diagram of LASER Light Source provided in an embodiment of the present invention；
Fig. 4 is the basic structure schematic diagram of another LASER Light Source provided in an embodiment of the present invention；
Fig. 5 is the basic structure schematic diagram of another LASER Light Source provided in an embodiment of the present invention；
Fig. 6 is a kind of basic structure schematic diagram of laser projection device provided in an embodiment of the present invention.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
Imitated for inconsistent to the light beam shrink beam ratio of different-waveband existing for existing laser attenuator, system radiating
The problem of fruit difference, the embodiments of the invention provide a kind of attenuator, LASER Light Source and projector equipment, utilize two speculums
The attenuator formed is combined, realizes the shrink beam ratio and effect for reaching consistent to the light beam of different wave length, and be advantageous to add
Heat abstractor is in mirror back surface.
Based on said structure principle, attenuator provided in an embodiment of the present invention and LASER Light Source will be carried out below detailed
Introduce.
Fig. 2 is a kind of basic structure schematic diagram of attenuator provided in an embodiment of the present invention.As shown in Fig. 2 the shrink beam
Device includes concave mirror 100 and convex reflecting mirror 200, wherein, concave mirror 200 is arranged at the light extraction of light source, is used
Convex reflecting mirror 200 is converged in the directional light for sending light source, to realize that the shrink beam of light beam acts on；Convex reflecting mirror 200 is set
The light direction in concave mirror 100 is put, and the radius of curvature of convex reflecting mirror 200 is less than the song of concave mirror 100
Rate radius, the light beam for the concave mirror 100 to be reflected are collimated, and are formed directional light and are exported.
Wherein, above-mentioned light source can be LASER Light Source, specifically, can be sent with single laser or multiple laser
Device closes beam and sent, while can also be that the LASER Light Source that multiple wavelength combinations are formed (can now be set in a laser BANK
The laser of multiple color, for example blue laser and red laser are set in an interleaved manner, or multiple BANK intervals row
Row), it is, of course, also possible to comprising other lighting sources, including LED (Light Emitting Diode, light emitting diode) and surpass
High brightness mercury lamp etc..
In order to improve collimating effect of the above-mentioned attenuator to light beam, the embodiment of the present invention, by Jiao of concave mirror 100
The focus of point and convex reflecting mirror 200 is arranged on same position (as long as the focal position of two speculums is missed in technique in this implementation
In poor tolerance, that is, think that both are in and be same as position), meanwhile, between concave mirror 100 and convex reflecting mirror 200
Interval is equal to two times of the radius of curvature of the concave mirror 100 and the radius of curvature difference of convex reflecting mirror 200, i.e. d=2
(rIt is recessed-rIt is convex).So, the less parallel light beam that laser group 10 is sent focuses on the table of convex reflecting mirror 200 through concave mirror 100
Behind face, the emergent light of convex reflecting mirror 200 can form collimated light beam.
The embodiment of the present invention, pass through the collocation to concave mirror 100 and the radius of curvature of convex reflecting mirror 200, so that it may
It is simple in construction effective to realize different shrink beam ratios.For example, the radius of curvature 400mm of concave mirror, secondary convex reflecting mirror
Radius of curvature be 200mm, and both focuses overlap, then actual shrink beam ratio is exactly 2, i.e., with primary mirror and the song of secondary mirror
Rate radii ratio is equal.
Further, if concave mirror 100 and convex reflecting mirror 200 are spherical reflector, speckle, shadow be there may be
Optical quality is rung, therefore, the face type of concave mirror 100 and the reflecting surface of convex reflecting mirror 200 is designed as parabolic by the present embodiment
Face type, it is, of course, also possible to be other face types.
Further, since above-mentioned concave mirror 100 and the useful effect face of convex reflecting mirror 200 are its reflecting surface, therefore, can
To set heat abstractor in its non-reflecting surface, for example, in above-mentioned concave mirror 100 and the non-reflecting surface of convex reflecting mirror 200
Heat radiation fin structure or thermal dispersant coatings etc. are respectively provided with, to the timely radiating of speculum, to mitigate optical component because heat accumulation is to light
Learn the influence of performance.Also, heat abstractor can be uniformly arranged on the non-reflecting surface of speculum by the embodiment of the present invention, to realize
To the Homogeneouslly-radiating of speculum, prolonged heat endurance is also can guarantee that for powerful laser light source.
The multiple reflection light path attenuator that the present embodiment forms concave mirror 100 and convex reflecting mirror 200 substitutes contracting
Beam telescopic system, because reflection-type part will not carry out the saturating of different refractivity because of the difference of wave-length coverage to light beam
Penetrate, so as to beneficial to ensure polychromatic source beam shaping uniformity, obtain space coincidence degree it is higher, distribution than more uniform light beam
Hot spot；Say from another point of view, the requirement to light source output consistent wavelength can also be reduced, such as close wave band can be used
LD (Laser Diode, semiconductor laser) is used as light source.Radiated in addition, mirror structure can be set in its non-reflecting surface
Structure, realizes the Homogeneouslly-radiating to reflection mirror component, mitigates optical component because of influence of the heat accumulation to optical property, and then can be with
Obtain space coincidence degree it is higher, distribution than more uniform beam and focus.
Further, the embodiment of the present invention additionally provides the reality being applied to above-mentioned attenuator in different LASER Light Sources
Apply a mode.
Fig. 3 is a kind of basic structure schematic diagram of LASER Light Source provided in an embodiment of the present invention.As shown in figure 3, the light source
It is main including laser group 10, for the carry out shrink beam and the attenuator 40 of collimation that are sent to laser group 10 and be used for
Receive the laser conversion light path 30 of the light beam after the shrink beam of attenuator 40 and collimation.
Wherein, laser group 10 sends beam of laser as light source, its can be single BANK lasers send or
Multiple BANK lasers close beam and sent, alternatively, it is also possible to be the LASER Light Source of multiple wavelength combinations formation, it is, of course, also possible to wrap
Containing other lighting sources, including LED and super brightness mercury lamp etc..The An Intense Beam of Light that laser group 10 is sent passes through designed contracting
Bundle device 40 realizes that light beam shrink beam exports.
Specifically, the concave mirror 401 in attenuator 40 is arranged at the light extraction of laser group 10, for by described in
The directional light that laser group 10 is sent converges to convex reflecting mirror 402, to realize that the shrink beam of light beam acts on；Convex reflecting mirror 402
The light direction of concave mirror 401 is arranged on, the light beam for the concave mirror 401 to be reflected is collimated, and is formed
Directional light and export give laser conversion light path 30.Laser conversion light path 30 can carry out corresponding processing synthesis to the laser of reception
White light, and being irradiated to the white light of synthesis in display device, for example, LCD (Liquid Crystal Display, liquid crystal
Display screen), DMD (Digital Micromirror Device, DMD) chips or LCOS (Liquid Crystal
On Silicon, the attached silicon of liquid crystal) chip etc., by projection lens on screen projection imaging.
As shown in figure 3, the laser conversion light path 30 in the present embodiment mainly includes diffusion sheet 305, dichroscope 301, gathered
Focus collimation lens group 302, reflection-type fluorescent wheel 303 and primary colours light circuit 304.Convex reflecting mirror is received using above-mentioned part
402 collimation after the first light beam and inspire fluorescence, and, receive convex reflecting mirror 402 collimate after the second light beam and with it is glimmering
It is emitted after actinic light.
Specifically, the light beam reflexed on diffusion sheet 305 is transmitted through dichroscope 301, dichroscope 301 after homogenizing
On be coated with dichroic film and be used to pass through the laser that sends of laser group 10 and reflected fluorescent light.Therefore, can by dichroscope 301
So that the light beam after homogenizing is transmitted into focussed collimated lens group 302, the light beam after focusing by focussed collimated lens group 302 is beaten
Onto reflection-type fluorescent wheel 303.
Reflection-type fluorescent wheel 303 includes fluorescence portion, such as red fluorescence portion and green fluorescence, transmissive portions and colour wheel are fixed
Component, wherein, reflecting part is additionally provided with the position of the substrate where fluorescence portion, the reflecting part can be to being excited caused fluorescence
Reflected.The driving rotation of 303 signal driven of reflection-type fluorescent wheel, the light beam passed through from focussed collimated lens group 302, with
The fluorescence and transmissive portions of reflection-type fluorescent wheel 303 are incided in the rotation of reflection-type fluorescent wheel 303.If light beam incides transmission
Portion, then light beam directly being transmitted into primary colours light circuit 304, (light that e.g., laser is sent is blue light, then the loop is returned for blue light
Road), light beam is reflected to dichroscope 301 after the steering of primary colours light circuit 304, dichroscope 301 is directly by the laser
Beam transmits away (laser beam is defined as the second light beam by the present embodiment)；If light beam incides fluorescence portion, laser beam (this
The laser beam is defined as the first light beam by embodiment) excite the fluorescent material in fluorescence portion to send fluorescence, this is excited caused fluorescence
Light is received by focussed collimated lens group 302, enters line convergence collimation for parallel or less parallel beam exit to dichroscope 301,
Dichroscope 301 goes out the fluorescent reflection.Finally, white light is formed after the fluorescence and laser closing light that are emitted from dichroscope 301
Beam enters even smooth part, and even smooth part is mapped on dmd chip after can carrying out even light to the light beam, and then realizes the photograph of the light source
Bright function.
Laser group 10 in the embodiment of the present invention is by taking semiconductor laser as an example, naturally it is also possible to is swashed using other types
Light device (such as fixed laser or gas laser etc.), the embodiment of the present invention does not do specific limitation to this.In addition, laser
The LASER Light Source that group 10 is formed is blue-light source, naturally it is also possible to the LASER Light Source of other colors, the quantity of laser color
Can be more, the embodiment of the present invention does not do specific limitation to this yet.
The embodiment of the present invention, the multiple reflection light path that concave mirror 401 and convex reflecting mirror 402 form be instead of into shrink beam
Telescopic system, ensure that the uniformity of polychromatic source beam shaping, obtain space coincidence degree it is higher, distribution than more uniform light
Beam hot spot.
To prevent from blocking light path, in the present embodiment, concave mirror 401 and convex reflecting mirror 402 can use from
The design of shaft type, i.e., optical axis and the laser group 10 of the shrink beam system being made up of concave mirror 401 and convex reflecting mirror 402
Light direction and the laser conversion light supply apparatus of light path 30 are not on same straight line.Further, concave mirror 401 and convex
The male-female structure of face speculum 402, if desired for realize light beam shrink beam collimation function, it is necessary to the song of concave mirror 401
Rate radius is more than the radius of curvature of convex reflecting mirror 402, meanwhile, convex reflecting mirror 402 is arranged on the focal length of concave mirror 401
In the range of, what both focuses were proximate to or overlapped.
Therefore, compared with telescope shrink beam system, under same shrink beam ratio, shrink beam used in the present embodiment fills
Put, LASER Light Source length direction (parallel to the light direction of laser group 10) size can be greatly shortened.
In order to simplify the light channel structure in above-mentioned laser conversion light path 30, the present embodiment additionally provides another laser light
Source.Fig. 4 is the basic structure schematic diagram of another LASER Light Source provided in an embodiment of the present invention.As shown in figure 4, concave mirror
Light hole 403 is further opened with 401, laser group 10 includes first laser device group 101 and second laser group 102.
Wherein, concave mirror 401 is used to the light beam that first laser device group 101 is sent converging to convex reflecting mirror 402,
Convex reflecting mirror 402 is used to be collimated the light beam that concave mirror 401 reflects；Light hole 403 is used for primary colours source laser
The light beam that device group 102 is sent is transmitted to laser conversion light path 50.
Further, laser conversion light path 50, for making the light beam that convex reflecting mirror 402 reflects using fluorescent apparatus and leading to
A beam excitation in the light beam that unthreaded hole 403 transmits produces fluorescence, and, make light beam and lead to that convex reflecting mirror 402 reflects
Another light beam in the light beam that unthreaded hole 403 transmits is combined with stating fluorescence, to provide illumination.
The embodiment of the present invention, the light that first laser device and second laser are sent, one as exciting light, another work
Be transmitted to laser for primary lights and convert light path, high-luminance light source device can save part primary colours light circuit to primary colours light path
Turnover, simplifies light channel structure.
Exciting light in view of being transmitted to fluorescent wheel needs to first pass through focussed collimated lens focus, therefore, highlighted to save
The light path element spent in light supply apparatus, the present embodiment is using first laser device group 101 as primary color laser device, second laser group
102 are used as optical excited laser, i.e., the light beam for transmiting light hole 403 using fluorescent apparatus produces fluorescence.
Specifically, as described in Figure 5, laser conversion light path 50 includes speculum 501, dichroscope 502, focussed collimated lens
Group 503 and fluorescent wheel 504.
Wherein, speculum 501 is correspondingly arranged with convex reflecting mirror 402, and the light beam that convex reflecting mirror 402 is reflected reflects
To dichroscope 502, dichroscope 502 directly transmits away the light beam.Meanwhile dichroscope 502 is also right with light hole 403
It should set, and the light beam that light hole 403 is transmitted is transmitted to focussed collimated lens group 503.Certainly, for the uniformity of light beam,
The light beam that light hole 403 transmits can also be first passed through after diffusion sheet 506 homogenizes, then is transmitted through dichroscope 502.Focussed collimated is saturating
The light beam that dichroscope 502 transmits is converged to fluorescent wheel 504 by microscope group 503.
Fluorescent wheel 504 includes fluorescence portion and colour wheel fixation kit, and the present embodiment is corresponding so that primary lights are blue light as an example
, its fluorescence portion can include red fluorescence portion and green fluorescence portion.Wherein, it is provided with the position of the substrate where fluorescence portion
Reflecting part, the reflecting part can be reflected being excited caused fluorescence.504 signal driven of fluorescent wheel driving rotation, from poly-
The light beam that focus collimation lens group 503 passes through, as its red fluorescence portion and green fluorescence portion are incided in the rotation of fluorescent wheel 504,
The fluorescent material in fluorescence portion is excited to send red and green fluorescence, this is excited caused fluorescence and passes through focussed collimated lens group 503
Light is received, it is to dichroscope 502, dichroscope 502 that the fluorescence is anti-for parallel or less parallel beam exit to enter line convergence collimation
It is shot out.Finally, formation beam of white light enters even by outlet eyeglass 505 after the fluorescence and laser being emitted from dichroscope 502 close
Light part, even smooth part is mapped on dmd chip after carrying out even light to the light beam, and then realizes the illumination functions of the light source.
From above-mentioned light path, because primary colours radiant can be provided separately by second laser group 101, therefore can not
The relaying of transmission area and primary lights turnover loop is set in fluorescent wheel, it is only necessary in primary colours radiant transmission light Lu Zhongshe
Speculum is put, light beam is reflexed into dichroscope, dichroscope transmits the primary lights and reflected fluorescent light of the color, completes multiple bases
The combining output of light, so as to simplify fluorescent wheel periphery framework, that is, simplify laser conversion light path.
The difference of the light path passed through in view of above-mentioned excitation source and primary light source, during above-mentioned light source use, this
Two groups of lasers can be with sequential export, for example excitation source is blue laser or ultraviolet light, for passing through thang-kng at the first moment
Hole is incident to fluorescent wheel and excites generation fluorescence, and at the second moment, another group of primary colours radiant (can be blue laser) point exposes
After there is certain delay to excitation source, exported after shrink beam system 40 carries out shrink beam to light beam., can in specific implementation
To design light source control device, and the light source control device connects with first laser device group 101 and second laser group 102 respectively
Connect, to control first laser device group 101 that there is certain delayed start-up with respect to second laser group 102.Certainly, in detailed process
In, be according to the opening sequence of specific light path design first laser device group 101 and second laser group 102.
In addition, the present embodiment using the light beam that first laser device group 101 is sent after the focussed collimated of attenuator 40 as
Primary lights use, and the light beam that second laser group 102 is sent uses transmitted through light hole 403 as exciting light, is being embodied
In example, it is other forms that laser can also be converted into light path design, for example, the light beam that first laser device group 101 is sent passes through
Used after the focussed collimated of attenuator 40 as exciting light, the light beam that second laser group 102 is sent is made transmitted through light hole 403
Used for primary lights, the present embodiment will not be repeated here.
Further, to make the structure of whole LASER Light Source more compact, while the above-mentioned He of second laser group 102 is prevented
Light beam is caused to block between first laser device group 101, light hole 402 is opened in the center of concave mirror 401 by the present embodiment
Region；Meanwhile first laser device group 101 includes the multiple first sub- lasers, each first sub- laser is around second laser group
102 are set.
In addition, as can be seen that what if second laser group 102 included from the optics framework of the LASER Light Source shown in Fig. 4
The number of laser cell is more, total spot size of laser emitting can be caused larger, therefore needed on concave mirror 401
Larger light hole is opened with complete light spot received, the reflecting surface area that this may result in concave mirror 401 is relatively reduced, accordingly
, the utilization rate that first laser device group 101 produces light beam can relative reduction.
Therefore, in order to reduce the light loss of primary colours light path, above-mentioned smooth through hole 403 open as far as possible it is smaller, therefore, second laser
Light beam caused by device group 102 should be incident in light through hole 403 with converged state as far as possible.As shown in figure 4, in the present embodiment,
LASER Light Source also includes the focusing arrangement 60 being arranged between second laser group 102 and convex reflecting mirror 402, wherein, focus on
Device 60 is used to the light beam that excitaton source laser group 102 is sent converging to light hole 403, in specific embodiment value, light hole
403 are located at the focal point or near focal point of focusing arrangement 60, i.e. the position of the light through hole 403 is arranged on the meeting focusing of excitation beam
Point at or near.Focusing arrangement 60 can use the modes such as a lens, multiple lens groups to realize its focusing function.
Further, primary color laser device can also be made to send red laser, optical excited laser sends wavelength and is shorter than red ripple
Long excitation beam, meanwhile, the fluorescence portion in fluorescent wheel 504 is designed, makes excitation beam excite fluorescent wheel to produce red fluorescence.
Then, light source control device is designed, the light source control device distinguishes first laser device group 101 and second laser group 102 connects,
And control first laser device group 101 and second laser group 102 while open so that red laser and red fluorescence are simultaneously defeated
Go out, to realize chromaticity coordinates correction or dissipation spot effect.
LASER Light Source in above-mentioned Fig. 3 and Fig. 4 only relates to the light source of a kind of color or two kinds of colors, naturally it is also possible to including
The structure of three-color light source.Fig. 5 is the basic structure schematic diagram of another LASER Light Source provided in an embodiment of the present invention.Such as Fig. 5 institutes
Show, the LASER Light Source also includes Multiplexing apparatus 70, and laser group 10 includes the 3rd laser group 103, the and of the 4th laser group 104
5th laser group 105, three lasers send red, green and blue laser respectively.
After the light beam that Multiplexing apparatus 70 is used to send the laser group 105 of the 3rd laser group 103 to the 5th carries out closing light
Export to concave mirror 401；Concave mirror 401 is used to the light beam that Multiplexing apparatus 70 exports converging to convex reflecting mirror
402, convex reflecting mirror 402 is used to be collimated the light beam of concave mirror reflection；Laser conversion light path 40 is used for convex surface
Light beam after speculum 402 collimates carries out homogenizing output.
So, after turnover of the above-mentioned Multiplexing apparatus to three light beams, closing beam, light beam is carried out by attenuator 40
After collimating shrink beam, directly output after laser conversion 80 needs of light path will be collimated, the light beam after shrink beam is homogenized, laser
Conversion light path 80 need not redesign fluorescence light path and primary lights light path, simplify optical component.Certainly, Multiplexing apparatus can be with
After the closing light of at least two color of light in blue light, feux rouges, green glow, it is transmitted to after the collimation focusing for carrying out light beam through attenuator
Laser converts light path.
Further, it is the characteristics of off-axis formula designs with reference to attenuator 40, the Multiplexing apparatus 70 in the present embodiment includes
For first dichroscope the 701 and the 2nd 2 to mirror 702, the first dichroscope 701 and the 2nd 2 can be according to concave reflection to mirror 702
The arrangement mode of mirror 401 and concave mirror 402 is arranged off axis, i.e., relative to the light direction of whole LASER Light Source,
One dichroscope the 701 and the 2nd 2 is to be arranged perpendicular to the light direction to mirror 702.
Also, the first dichroscope 701 is used to the light beam that the 3rd laser group 103 is sent being transmitted through concave mirror
401, and the light beam that the second dichroscope 702 is transmitted and reflected reflexes to concave mirror 401；Second dichroscope 702, use
Light beam, which is sent, in the 4th laser group 104 reflexes to the first dichroscope 701, and the light that the 5th laser group 105 is sent
Beam is transmitted through the first dichroscope 701；Concave mirror 401, for the light beam meeting that the first dichroscope 701 is reflected and transmitted
Gather convex reflecting mirror 402.
For example, the 3rd to the 5th laser sends red, green successively and blue laser, the first dichroscope 701 pass through
Plated film realizes transmission feux rouges, reflection green and blueness, and the two or two realizes transmission green glow, reflection blue light to mirror 702 by plated film.
Multiplexing apparatus provided in an embodiment of the present invention, it is the characteristics of off-axis formula designs for attenuator 40, to the one or two
It is designed to arrangement mode from Look mirror 701 and the 2nd 2 to mirror 702 and function, LASER Light Source length direction can be shortened
Size.It should be noted that the present embodiment illustrate only a kind of light combination mode, other elements such as closing light mirror can also be used, this
Embodiment will not be repeated here.
Further, as shown in figure 5, the present embodiment additionally provides the inner member structure of laser conversion light path 80, specifically
Including scattering sheet 801, focussed collimated lens group 802 and optical tunnel 803, wherein, scattering sheet 801 reflects convex reflecting mirror 402
Light beam homogenized after be transmitted through focussed collimated lens group 802, the light that focussed collimated lens group 802 transmits scattering sheet 801
Beam converges to optical tunnel 803, and the light beam that optical tunnel 803 transmits to focussed collimated lens group 802 homogenizes.
Based on identical technical concept, the embodiment of the present invention also provides a kind of laser projection device, the laser projection device
The LASER Light Source that is there is provided of the above embodiment of the present invention can be provided, the laser projection device can be specifically laser movie theatre or
Laser television, or other laser projection instruments etc..
Fig. 6 shows laser projection device schematic diagram provided in an embodiment of the present invention.As shown in fig. 6, the laser projection
Equipment includes：LASER Light Source 61, ray machine 62, camera lens 63.
Wherein, LASER Light Source 61 is the LASER Light Source that the above embodiment of the present invention is provided, and for details, reference can be made to foregoing implementation
Example, will not be described in great detail herein.Specifically, LASER Light Source 61 is that ray machine 62 provides illumination, and ray machine 62 is modulated to light beam of light source,
And export and be imaged to camera lens 63, it is projected to projection medium 64 (such as screen or wall etc.) and forms projected picture.Wherein,
Described ray machine 62 can be the dmd chip in the above-mentioned optics framework based on LASER Light Source.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiment, and related part is referring to side
The part explanation of method embodiment.Those skilled in the art will easily think after the invention of specification and practice here is considered
To other embodiments of the present invention.The application is intended to any modification, purposes or the adaptations of the present invention, these
Modification, purposes or adaptations follow the general principle of the present invention and not invented in the art including the present invention
Common knowledge or conventional techniques.Description and embodiments are considered only as exemplary, of the invention true scope and essence
God is pointed out by following claim.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is only limited by appended claim.
Claims (11)
- A kind of 1. attenuator, it is characterised in that the attenuator includes concave mirror and convex reflecting mirror, wherein：The directional light that the concave mirror is used to send light source converges to the convex reflecting mirror；The radius of curvature of the convex reflecting mirror is less than the radius of curvature of the concave mirror, for by the concave mirror The light beam of reflection carries out collimation and forms directional light.
- 2. attenuator according to claim 1, it is characterised in that the focus of the concave mirror and the convex surface are anti- The focus for penetrating mirror is in same position, and the interval between the concave mirror and convex reflecting mirror is equal to the concave mirror Two times of radius of curvature difference of radius of curvature and the convex reflecting mirror.
- 3. attenuator according to claim 1 or 2, it is characterised in that the concave mirror and/or the convex surface are anti- The non-reflecting surface for penetrating mirror is provided with heat abstractor.
- 4. attenuator according to claim 3, it is characterised in that the heat abstractor is described recessed including being fixedly connected on Radiating fin on the non-reflecting surface of the non-reflecting surface of face speculum and/or the convex reflecting mirror.
- 5. attenuator according to claim 1 or 2, it is characterised in that the concave mirror and convex reflecting mirror Reflecting surface face type is parabola.
- A kind of 6. LASER Light Source, it is characterised in that the LASER Light Source includes any described attenuator of claim 1 to 5, Also include the laser group and laser conversion light path for sending laser, wherein：Concave mirror in the attenuator is used to the light beam that the laser group is sent converging to the convex refractive Mirror；Convex reflecting mirror in the attenuator is used to be collimated the light beam that the concave mirror reflects, and is formed parallel Or less parallel light beam；The laser conversion light path is used to receive the light beam after the attenuator shrink beam and collimation.
- 7. LASER Light Source according to claim 6, it is characterised in that the laser conversion light path is used to receive the convex surface The first light beam after speculum collimation simultaneously inspires fluorescence, and, receive the second light beam after convex reflecting mirror collimation simultaneously With being emitted after the fluorescence closing light；Wherein, first light beam and the second light beam are blue light beam.
- 8. LASER Light Source according to claim 6, it is characterised in that the laser conversion light path is used to receive the convex surface It is emitted after the 3rd light beam after speculum collimation；Wherein, the 3rd light beam is at least two colors in blue light, feux rouges, green glow The closing light of light.
- 9. LASER Light Source according to claim 6, it is characterised in that the concave mirror also on offer light hole, Wherein：The laser conversion light path is used to receive the 4th light beam of the light hole transmission and inspires fluorescence, and, receive institute State the 5th light beam after convex reflecting mirror collimation and with being emitted after the fluorescence closing light；Wherein, the 4th light beam and described Five light beams are blue light beam.
- 10. LASER Light Source according to claim 9, it is characterised in that the LASER Light Source is also described sharp including being arranged on Focusing arrangement between light device group and the concave mirror, wherein：The focusing arrangement, for the 4th light beam to be converged into the light hole；The light hole fills positioned at described focus on The focal point or near focal point put.
- 11. a kind of laser projection device, including ray machine, camera lens and the laser light as any one of claim 6 to 10 Source；Described LASER Light Source provides illumination for the ray machine, and the ray machine is modulated to light beam of light source, and exports to described Camera lens is imaged, and is projected to projection medium and is formed projected picture.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711123108.XA CN107797296A (en) | 2017-11-14 | 2017-11-14 | A kind of attenuator, LASER Light Source and laser projection device |
| PCT/CN2018/088081 WO2019095661A1 (en) | 2017-11-14 | 2018-05-23 | Beam contraction device and laser projection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711123108.XA CN107797296A (en) | 2017-11-14 | 2017-11-14 | A kind of attenuator, LASER Light Source and laser projection device |
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| CN107797296A true CN107797296A (en) | 2018-03-13 |
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| CN201711123108.XA Pending CN107797296A (en) | 2017-11-14 | 2017-11-14 | A kind of attenuator, LASER Light Source and laser projection device |
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| WO2019095661A1 (en) * | 2017-11-14 | 2019-05-23 | 海信集团有限公司 | Beam contraction device and laser projection apparatus |
| CN110112651A (en) * | 2019-05-09 | 2019-08-09 | 西华大学 | A kind of external cavity feedback spectrum beam combination device of adjustable output beam spectrum width |
| CN111175303A (en) * | 2019-11-27 | 2020-05-19 | 广州德擎光学科技有限公司 | A laser processing quality monitoring system for multi-channel optical signal detection |
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Application publication date: 20180313 |