CN106773482A - Laser projection device and its LASER Light Source - Google Patents
Laser projection device and its LASER Light Source Download PDFInfo
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- CN106773482A CN106773482A CN201611223900.8A CN201611223900A CN106773482A CN 106773482 A CN106773482 A CN 106773482A CN 201611223900 A CN201611223900 A CN 201611223900A CN 106773482 A CN106773482 A CN 106773482A
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- light source
- laser light
- diffusion disk
- laser
- prefocus cup
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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
- G03B21/2033—LED or laser light sources
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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
- G03B21/2066—Reflectors in illumination beam
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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
- G03B21/208—Homogenising, shaping of the illumination light
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention provides a kind of LASER Light Source, including prefocus cup, multiple sets of light sources and diffusion disk, wherein multiple sets of light sources sends the laser of different colours, at least one set of light source is arranged at prefocus cup side, remaining at least one set of light source, and diffusion disk is arranged at prefocus cup opposite side, so as to the laser beam of multigroup LASER Light Source can be all focused at the surface of diffusion disk by prefocus cup, and carry out dissipation spot by diffusion disk transmission, improve the utilization ratio of dissipation spot part, and the light source framework is effectively using the inner space of prefocus cup, compact conformation, be conducive to the miniaturization of laser projection device.
Description
Technical field
The present invention relates to laser projection field, particularly a kind of laser projection device and its LASER Light Source.
Background technology
Laser is a kind of high brightness, and high directivity sends the light source of monochromatic coherent light beam, due to the plurality of advantages of laser,
In recent years by gradually as light source applications in projection display technique field.But the speckle issue of pure LASER Light Source is serious and cost
Height, speckle phenomena can reduce the image quality of projected image, therefore be set, it is necessary to carry out dissipation spot light path in application LASER Light Source
Meter.
Generally, when the laser using multigroup different colours, dissipated accordingly spot part for every road laser
Set, such as diffusion sheet or random phase piece, the diffusion sheet of rotation can be dissipated laser beam, play certain disappearing
Speckle is acted on, and then Zai Jiangge roads laser beam carries out closing light by the closing light such as dichroscope element, as light beam outgoing
And form illuminating bundle.But this light path design causes that light path element is more, and structure disperses, volume is larger.
The content of the invention
It is an object of the invention to provide a kind of simple structure, the laser projection device of small volume and its LASER Light Source.
A kind of LASER Light Source, including：
Prefocus cup, the inner side of prefocus cup is the reflecting surface of concave shaped, and the bottom of prefocus cup offers light hole；
Transmission-type diffusion disk, is oppositely arranged located at the inner side of prefocus cup, and diffusion disk with light hole, and diffuser surface is provided with unrestrained
Beam；
First laser light source for sending the first light beam, located at the outside of prefocus cup, the first light beam is incided by light hole
On diffusion disk, and transmitted through diffusion disk；
Second laser light source for sending the second light beam, located at the inner side of prefocus cup, the second light beam through prefocus cup reflecting surface
Reflection, incides on diffusion disk, and is transmitted through diffusion disk；
Further, also including sending the 3rd LASER Light Source of the 3rd light beam, the 3rd LASER Light Source located at the inner side of prefocus cup and
It is set up in parallel with diffusion disk, the 3rd light beam is incided on diffusion disk through the reflective surface of prefocus cup, and is transmitted through diffusion disk；
Further, diffusion disk rotary motion；
Or, further, diffusion disk vibrates or swings；
Further, the reflecting surface of prefocus cup is parabola, and the light beam for being incident in reflecting surface is parallel to paraboloidal central shaft
Collimated light beam, the incidence point of diffusion disk is located at paraboloidal focal point；
Further, the reflecting surface of prefocus cup is sphere, and the incidence point of diffusion disk is located at the focal point of sphere.
Further, diffusion disk includes the first diffusive regions and the second diffusive regions, first laser light source and second laser light source
Sequential is lighted, successively incident first diffusive regions and the second diffusive regions.
Further, the first light beams colors are blueness, and the second light beams colors are red, and the 3rd light beams colors are green.
And, a kind of LASER Light Source is additionally provided, including：
Prefocus cup, the inner side of prefocus cup is the reflecting surface of concave shaped；
Diffusion disk, located at the inner side of prefocus cup, diffusion disk is provided with diffuser, and transmitted light towards a side surface of reflecting surface
Beam；
Multigroup LASER Light Source, located at the inner side of prefocus cup, light source sends excitation beam, and excitation beam is anti-through the reflecting surface of prefocus cup
It is incident upon on diffusion disk, and transmits outgoing；
Further, multiple sets of light sources includes blue laser light source and red laser light source；
Further, multiple sets of light sources includes blue laser light source, red laser light source, green laser light source.
And, additionally provide a kind of laser projection device, including any of the above-described technical scheme LASER Light Source.
In above-mentioned laser projection device and its LASER Light Source, can be by the laser light of multigroup LASER Light Source by prefocus cup
Beam is all focused at the surface of diffusion disk, and carries out dissipation spot by diffusion disk transmission, improves the utilization ratio of dissipation spot part,
And the light source framework, effectively using the inner space of prefocus cup, compact conformation is conducive to the miniaturization of laser projection device.
Brief description of the drawings
Figure 1A is a kind of structural representation of LASER Light Source that the embodiment of the present invention one is provided；
Figure 1B is the structural representation of another LASER Light Source that the embodiment of the present invention one is provided；
Fig. 2 is a kind of structural representation of LASER Light Source that the embodiment of the present invention two is provided；
Fig. 3 A, Fig. 3 B are a kind of structural representation of LASER Light Source that the embodiment of the present invention three is provided；
Fig. 3 C are a kind of LASER Light Source arrangement architecture top view that the embodiment of the present invention three is provided；
Fig. 4 is the structural representation of the prefocus cup that the embodiment of the present invention three is provided；
Fig. 5 A, Fig. 5 B, Fig. 5 C are the motion mode schematic diagram of diffusion disk provided in an embodiment of the present invention；
Fig. 6 A, Fig. 6 B are the plane subregion schematic diagram of diffusion disk provided in an embodiment of the present invention；
Fig. 7 is the configuration diagram of the laser projection device that the embodiment of the present invention four is provided.
Specific embodiment
Embodying feature of present invention will describe in detail in the following description with the exemplary embodiment of advantage.It should be understood that
The present invention can have various changes in different implementation methods, and it is neither departed from the scope of the present invention, and theory therein
Bright and diagram is treated as purposes of discussion in itself, and is not used to the limitation present invention.
Embodiment one,
The present invention provides a kind of LASER Light Source 01.Fig. 1 is referred to, LASER Light Source 01 includes that prefocus cup 11, diffusion disk 12, first swash
Radiant 13, second laser light source 14.First laser light source 13 is located at the outside of prefocus cup 11, diffusion disk 12, second laser light
Source 14 is located at the inner side of prefocus cup 11.
Prefocus cup 11 is used for the reflected beams.Prefocus cup 11 is substantially in bowl structure, and the inner concave of prefocus cup 11 is reflecting surface
111.Specifically, the inner concave of prefocus cup 11 is that parabola, i.e. reflecting surface 111 are parabola.Reflecting surface 111 is parabola, can
To ensure that the second light beam is incided on reflecting surface 111 with directional light, the reflection of reflected face 111 can converge at focal point.
It is appreciated that reflecting surface 111 can also be sphere.Second light beam is incident to spherical reflective surface 111, and reflected face
111 reflection post-concentrations and sphere focal point.First light beam is also incident to sphere focal point through transmission.
The bottom of prefocus cup 11 offers light hole 112.The one end open of prefocus cup 11, the other end offers light hole
112.Also, light hole 112 is located at the center position of the bottom of prefocus cup 11.The size of light hole 112 and first laser light
The spot size that source 13 is incident upon prefocus cup 11 is consistent, to ensure that the laser beam that first laser light source 13 sends all passes through
Light hole 112.
Diffusion disk 12 is provided with the side of reflecting surface 111 located at prefocus cup 11, and is oppositely arranged with light hole 112.
First laser light source 13 incides diffusion disk 12 located at the outside of prefocus cup 11, the first light beam by light hole 112
On.
Specifically in the present embodiment, first laser light source 13 is oppositely arranged with light hole 112, and the first light beam can be direct
Incided on diffusion disk 12 by light hole 112.It is appreciated that first laser light source 13 can also be by speculum or total reflection
Prism etc., the first light beam is reflexed at light hole 112.
It is appreciated that first laser light source 13 can be multiple lasers into array arrangement into laser array.
The LASER Light Source 01 of present embodiment is additionally provided with condenser lens 16 along the light direction of first laser light source 13.Focus on
Lens 16 are located between prefocus cup 11 and first laser light source 13.The incidence point of diffusion disk 12 is located at the focus of condenser lens 16
Place.The incidence point of diffusion disk 12 is the position of light beam incidence diffusion disk 12.The first light beam for then being sent by first laser light source 13
Line focus lens 16 are focused at the incidence point of diffusion disk 12.
It is appreciated that condenser lens 16 can be the focus lens group of multiple lens compositions, do not limit herein, as long as energy
It is enough to focus at the incidence point of diffusion disk 12 first light beam.
Second laser light source 14 is used to send the second light beam.
Second laser light source 14 can be set up in parallel with diffusion disk 12.
First laser light source 13 is different with the light beams colors that second laser light source 14 sends.Specifically, can be with one of them
It is blue laser, another is red laser.
Specifically, diffusion disk 12 can be random phase piece or diffusion sheet.
Diffusion disk can carry out periodic rotational movements by drive motor, such as do the rotary motion of circumferencial direction, such as
Shown in Fig. 5 A.
Or diffusion disk is swung by driver part, such as can be along the plane where diffusion disk, with where plane
X-axis or Y-axis carry out back and forth or left and right swing for rotary shaft, as shown in Figure 5 B.
Or diffusion disk carries out the vibration of above-below direction by driver part, as shown in Figure 5 C.
Above are only the citing of diffusion disk motion mode, it is not limited to this.
When diffusion disk 12 carries out rotary motion as depicted, the first light beam and second that first laser light source sends swash
The second light beam that radiant sends can successively be incident to diffusion disk according to sequential is lighted, so as to be carried out by the diffusion disk for rotating
Dissipation spot.
And, because human eye is different to the speckle sensitivity of different colours laser, therefore, it can according to laser beam face
The difference of color, as shown in Figure 6A, is respectively provided with the first diffusive regions a and the second diffusive regions b, different with the rotation of diffusion disk 12
Diffusive regions a, b respectively exposed to different colours laser beam irradiation under.
Exemplary, the first diffusive regions a is specifically for transmitting blue laser, and the second diffusive regions b is red specifically for transmission
The diffusing particle granularity of laser, the first diffusive regions and the second diffusive regions, dispersion angle is different, specific second diffusive regions it is unrestrained
Penetrate diffusing particle dispersion angle of the particle dispersion angle more than the first diffusive regions.So as to the degree to red laser dissipation spot is more than
To blue laser, two kinds of speckle degree of color laser on human eye vision can be balanced.
Above-mentioned the first, the second printed words are only used for distinguishing the difference of diffusive regions, the not restriction of composition order.
In the present embodiment, diffusion disk 12 is provided with diffuser, diffusion disk towards a side surface of the reflecting surface of prefocus cup 11
12 are transmissive to light beam.The first laser light source 13 for being arranged at the outside of prefocus cup 11 sends the first light beam, is entered by light hole 112
Be mapped on diffusion disk 12, and transmitted through diffusion disk 12, and located at prefocus cup 11 inner side second laser light source 14 send
Two light beams, through the reflective surface of prefocus cup 11, incide on diffusion disk 12, and are transmitted through diffusion disk 12, so that blue
Laser and red laser can be diffused dissipation spot by diffusion disk 12.
As the modification of above-mentioned application, when prefocus cup reflecting surface inner side only sets one group of laser array, in order to enter one
Step reduces light source framework volume, and the shape of prefocus cup can also further simplify, such as, in the framework shown in Figure 1A, for not
The corresponding optically focused cup portion of reflecting surface being utilized can be omitted, only setting unit parabolic shape, such as half, and structure is improved
Schematic diagram afterwards is as shown in Figure 1B.In the light source framework shown in Figure 1B, diffusion disk 12 is referred to set in Figure 1A.
In the above-described embodiments, the laser beam of two-color laser light source can be all focused at one by reflection condensation cup
The surface of piece diffusion disk, diffusion disk is rotated, and can be diffused the mesh for reaching dissipation spot to the laser beam for transmiting
, the utilization ratio of dissipation spot part, and light source framework are improve effectively using the inner space of prefocus cup, compact conformation has
Beneficial to the miniaturization of laser projection device.
Embodiment two,
As the modification of above-mentioned application, if the LASER Light Source is used as projection light source, at least including three primary colours, based on above-mentioned light source
Framework, in order to export three primary colours, is additionally provided with the 3rd light source, specifically, the 3rd light source can be laser array or LED light
Source, or fluorescence light source.
In this example, illustrated so that the 3rd light source is laser array as an example.As shown in Fig. 2 based on shown in Figure 1A
Light source framework, also including the 3rd LASER Light Source 15, for sending the 3rd light beam.3rd light beam send with foregoing first light beam,
The 3rd different light beam of second light beams colors, such as be green laser.
It should be noted that the first light beam, the second light beam, the color that the 3rd light beam is not limited in the present embodiment is suitable
Sequence, as long as three's color can make up three primary colours, the arrangement of above-mentioned three kinds of LASER Light Sources is also not limited to what it sent
Color and the position where determining it.
Also, in the present embodiment, the reflecting surface 111 of prefocus cup 11 is provided with high reflection layer, high reflection layer can be by
The light beam for inciding reflecting surface 111 all reflects, to improve the utilization rate of the luminous energy of LASER Light Source 10.
As shown in Fig. 2 the 3rd LASER Light Source 15 is also disposed on the inner side of prefocus cup 11, and it is set up in parallel with diffusion disk 12.
That is, the LASER Light Source 15 of second laser light source 14 and the 3rd is set around the periphery of diffusion disk 12.It is appreciated that second laser light source
14 and the 3rd LASER Light Source 15 can be symmetrically distributed in the both sides of diffusion disk 12, it is also possible to asymmetric distribution is in the outer of diffusion disk 12
Week, or, second laser light source 14 is parallel with the plane where diffusion disk 12 with the plane of the position of the 3rd LASER Light Source 15,
And in being not necessarily generally aligned in the same plane.
Second light beam can reflect with the 3rd light beam through the reflecting surface 111 of prefocus cup 11, incide the upper of diffusion disk 12, the
One light beam is then re-shoot and transmitted through diffusion disk 12 by light hole 112, so as to transmit output successively from the opposite side of diffusion disk 12
Three primary colours, form illuminating bundle.
In the present embodiment, first laser light source 13, the LASER Light Source 15 of second laser light source 14 and the 3rd are laser
Device.The inner concave of prefocus cup 11 is parabola.The incidence point of diffusion disk 12 is located at paraboloidal focal point.Specifically, laser
The light beam that array sends is collimated light beam, then the second light beam and the 3rd light beam are collimated light beam, and each parallel in paraboloidal
Axis direction.Therefore, the second light beam it is parallel with the 3rd light beam incide prefocus cup 11 reflecting surface 111 when, then it is reflected
Second light beam and the 3rd light beam of the reflection of face 111 can converge at paraboloidal focal point.And paraboloidal focal point is located at and overflows
The incidence point of piece 12 is penetrated, so that, after the second light beam and the 3rd light beam reflect through prefocus cup 11, the first light beam transmits through prefocus cup 11
Converge at a bit, carry out dissipation spot using diffusion disk 12, diffusion disk 12 such as Fig. 5 A, or can be carried out not shown in Fig. 5 B or Fig. 5 C
With the motion of motion mode, strengthen the effect of dissipation spot.
And, diffusion disk 12 similarly can also carry out the division of different diffusive regions, for green laser shown in reference picture 6A
The diffusion region for passing through, the diffusion region that its dispersion angle can pass through with blue laser is identical, it is also possible to swash with red
The diffusion region that light passes through is identical, or is differed with both of which.
And, the LASER Light Source 10 of present embodiment is additionally provided with collimation lens, assembles saturating along the direction of propagation of illuminating bundle
Mirror 17.Collimation lens collimates illuminating bundle.Illuminating bundle is assembled and focused on by convergent lens 17.Through the illumination that diffusion disk 12 is transmitted
Light beam is in divergent state, it is necessary to by quasi- collimated, convergent lens 17 is assembled.
It is appreciated that collimation lens can also be collimation lens set, do not limit herein.Equally, convergent lens 17 can be with
It is the convergent lens group of multiple lens composition, does not limit herein, as long as line convergence can be entered to illuminating bundle.
The LASER Light Source 10 of present embodiment is provided with even light part 18 along the direction of propagation of illuminating bundle.The incidence of even light part 18
Point is provided with the focal point of convergent lens 17.The incidence point of even light part 18 is even light part 18 in one end end face of diffusion disk 12
Heart point.Even light part 18 is used to carry out even light to illuminating bundle.The concentrated lens 17 of illuminating bundle are focused at the incidence of even light part 18
Point, and incide in even light part 18, homogenized through the even illuminating bundle of light part 18.Specifically, even light part 18 can be optical wand.Through
Cross after the collimation lens at the back side of diffusion disk 12, convergent lens 17 receive light and enter even light part 18, there is provided homogenized illuminating bundle.
In the LASER Light Source 01 of above-mentioned example, one group of light source is arranged at prefocus cup outside, and two groups of light sources are arranged in addition
Prefocus cup inner side, diffusion disk is also disposed on prefocus cup inner side.Can be by first laser light source 13, second laser light by prefocus cup 11
The laser beam of the LASER Light Source 15 of source 14 and the 3rd is focused at the surface of diffusion disk 12, and according to sequential is lighted, it is variant
Laser beam reaches the purpose of dissipation spot by the diffused transmission of diffusion disk 12.And the laser beam of different colours is according to lighting
Sequential transmits diffusion disk successively, improves the utilization ratio of diffusion disk dissipation spot, and, second laser light source 14, the 3rd laser
Light source 15 and diffusion disk 12, can effectively using the inner space of prefocus cup 11 located at the inside of prefocus cup 11, and light source framework is tight
Gather, reduce the framework volume of light source, be conducive to the miniaturization of laser projection device.
Embodiment three,
The embodiment of the present invention provides a kind of light source framework for the spot that dissipates, and as shown in Figure 3 A and Figure 3 B, includes respectively：Prefocus cup
21st, diffusion disk 22, first laser light source 23, the LASER Light Source 25 of second laser light source 24 and the 3rd.Wherein, first laser light source
23rd, the LASER Light Source 25 of second laser light source 24 and the 3rd is set around diffusion disk 22, as shown in Figure 3 C, and this three groups of laser lights
Source is respectively positioned on the reflecting surface side of prefocus cup 11.Fig. 3 A and Fig. 3 B be used for illustrate in different angles it is observed that laser light
Source group.
It will be appreciated by those skilled in the art that Fig. 3 C are merely to illustrate multiple sets of light sources being set around diffusion disk, do not limit
Relative position relation between each group light source, such as angle angle, height, these selections can be set according to real needs.
First laser light source 23, second laser light source 24, the color of the light beam that the 3rd LASER Light Source 25 sends is set, illumination
Beam Propagation mode is referred to the content of embodiment two, will not be repeated here.
In this example, prefocus cup 21 can as described in embodiment one or embodiment two, from parabola cup, then the
One LASER Light Source 23, second laser light source 24, the 3rd LASER Light Source 25 sends collimated light beam respectively, and collimated light beam is parallel to parabolic
The central shaft of face cup, and the reflection post-concentration of indent reflecting surface 211 and the focal point of parabola cup by parabola cup, the focus
Positioned at the incidence surface surface of diffusion disk 22.
Or, the inner concave of prefocus cup 21 is sphere, and highly reflecting films are provided with sphere.And in concrete application, sphere
Focus is located on the incidence surface of diffusion disk.As shown in figure 4, spherical prefocus cup 21 has sphere focus A.
Set-up mode can be, first laser light source, second laser light source and two groups therein of the 3rd LASER Light Source on
Sphere focus is symmetricly set in the both sides of diffusion disk 22, and another group of LASER Light Source is then with arbitrarily angled setting, but three groups of light source warps
Reflecting surface 211 reflects post-concentration in a bit, so that diffusion disk 22 is located at the point of intersection of three light beams.
Or, three LASER Light Sources with around mode arrange with around diffusion disk 22.
Because the indent reflecting surface of prefocus cup 21 in this case is spherical, so that in this three groups of LASER Light Sources, one or two
Person can be configured with the mode of the plane angle in a certain angle where diffusion disk 22, now, the two LASER Light Sources outgoing
Light beam not as described in embodiment one or embodiment two be the light beam being parallel to each other, but relative to indent reflecting surface
Symmetry axis be in certain angle.Because indent reflecting surface is sphere, it is incident to the light beam of the sphere and is reflected and globally footpath
To directionally focused, sphere focal position is focused on.
And, in this example, diffusion disk 12 can be vibrated or be swung or rotary motion, and be overflow with different
Differentiation area is penetrated, will be illustrated so that diffusion disk 12 is vibrated as an example below, then the planar structure schematic diagram of diffusion disk 12 is as schemed
Shown in 6B, the first diffusive regions a, the second diffusive regions b can be provided with.When diffusion disk carries out up-down vibration, the first moment, light beam
The first diffusive regions a is incident to, the second moment, light beam is incident to the second diffusive regions b.Specifically, the two diffusive regions are incident to
The color of light beam is simultaneously not specifically limited, and can be determined according to the sequential of lighting of light source.
In order to strengthen the effect of dissipation spot, the dispersion angle of above-mentioned two diffusive regions can be set to difference, so as to increase
Plus light beam is by the diversity of diffusion dispersion angle.
Or, based on above-mentioned diffusive regions subregion on the basis of, the exiting surface of diffusion disk 12 is also equipped with micro-structural, micro- knot
Diffusing particle of the structure similar to the incidence surface of diffusion disk 12.And the diffusive microstructure dispersion angle of incidence surface and exiting surface can not
Together, or diffusing particle granularity is different.Such that it is able to using a piece of diffusion disk to being transmitted through the light of incidence surface and exiting surface
Shu Jinhang different degrees of twice diverging, is also beneficial to improve the dissipation spot efficiency of diffusion disk.
And, two diffusive regions are only gived in the example of above-mentioned Fig. 6 B, naturally it is also possible to be provided with the 3rd diffusive regions, match somebody with somebody
The frequency and light source for closing oscillating movement light sequential, and the laser of different colours can be with incident different diffusive regions subregion.
Specifically, blue laser is sent with first laser light source 23, second laser light source 24 sends red laser, and the 3rd swashs
Radiant 25 sends the beam Propagation process that this LASER Light Source framework is illustrated as a example by green laser：
At the first moment, when first laser light source 23 is lit, blue laser is sent, other two kinds of LASER Light Sources are non-lit up, it is blue
Color laser passes through the light hole of prefocus cup 21 and is incident to the first diffusive regions of diffusion disk 22.
At the second moment, when second laser light source 24 is lit, red laser is sent, and first laser light source 23 and the 3rd swashs
Radiant 25 is non-lit up, then red laser light beam light is incident to the spill interior reflective surface of prefocus cup, and is reflected and converged at
Second diffusive regions of diffusion disk 22.Wherein, dispersion angle of the dispersion angle of the second diffusive regions more than the first diffusive regions.
At 3rd moment, when the 3rd LASER Light Source 25 is lit, green laser is sent, similarly, blue laser and red laser
Do not export now, green laser beam light is incident to the spill interior reflective surface of prefocus cup, and reflected and converge at diffusion disk 22
The 3rd diffusive regions.Wherein, the dispersion angle setting of the 3rd diffusive regions can be with the first diffusive regions, the angle of divergence of the second diffusive regions
Degree is identical, it is also possible to differ.
And, content in similar embodiment two, the LASER Light Source 02 of present embodiment along illuminating bundle the direction of propagation also
It is provided with collimation lens, convergent lens 27.Collimation lens collimates illuminating bundle.Illuminating bundle is assembled and focused on by convergent lens 37.
The illuminating bundle transmitted through diffusion disk 22 is nearly bright rich body distribution, it is necessary to be collimated by collimation lens, convergent lens 27 is assembled.
And, the LASER Light Source 02 of present embodiment is provided with even light part 28 along the direction of propagation of illuminating bundle.Even light part 28
Incidence point be provided with the focal point of convergent lens 27.The incidence point of even light part 28 is even light part 28 near one end end of diffusion disk 22
The central point in face.Even light part 28 is used to carry out even light to illuminating bundle.The concentrated lens 27 of illuminating bundle are focused at even light part 28
Incidence point, and incide in even light part 28, homogenized through the even illuminating bundle of light part 28.Specifically, even light part 28 can be
Optical wand.Collimation lens, convergent lens 37 by the back side of diffusion disk 22 enter even light part 38 after receiving light, there is provided homogenized illumination light
Beam.
So as to the LASER Light Source 02 that this example is provided, can be by first laser light source 23, second laser light by prefocus cup 21
The laser beam of the LASER Light Source 25 of source 24 and the 3rd carries out reflection post-concentration on the surface of diffusion disk 22, and according to lighting sequential
By the diffused transmission of the different diffusive regions of diffusion disk 22, the purpose of dissipation spot is reached, and be capable of disappearing for balanced each color laser
Speckle effect.And this three groups of lasers and diffusion disk are located at the inside of prefocus cup, effectively using the inner space of prefocus cup.
The utilization rate of the dissipation spot part of above-mentioned LASER Light Source 02 is improved, and compact conformation, is conducive to the miniaturization of laser projection device
Development.
It should be noted that in this example, being carried out with being provided with three groups of different colours lasers on the inside of prefocus cup
For example, certainly, according to product the need for, it is also possible to using above-mentioned framework thought set two groups of different colours laser enter
Row dissipation spot, and another group of light source of color can not be laser, such as be LED light source or fluorescence light source, can be two
The laser of kind of color by after diffusion disk dissipation spot again with the 3rd in the light source of color carry out closing light, constitute light source framework.Using
The two-color laser light source of above-mentioned light source framework equally also can carry out dissipation spot by a piece of diffusion disk, and it is tight to reach light source framework
The purpose gathered.
Example IV,
As shown in fig. 7, the present invention also provides a kind of laser projection device 1, the laser projection device can be specially ultrashort burnt throwing
Shadow equipment.Laser projection device 1 include above-described embodiment one or two or three in LASER Light Source 10, ray machine 20, camera lens 30 and
Projection screen 40, camera lens 30 can be specially ultrashort out-of-focus projection's camera lens.
In above-mentioned laser projection device 1, the timing of LASER Light Source 10 ground output three primary colours light, three primary colours light passes through even light
Part enters the part of ray machine 20.The part of ray machine 20 includes optical wand structure, light path converting device and DMD（Digital
Micromirror Device）Chip.Dmd chip includes multiple small speculums, and these micro-reflectors are under electric current driving
Overturn in the range of certain angle, to adjust the light quantity into camera lens 30, so that image is presented different colors.Light
After reaching camera lens 30 after dmd chip modulation, by the optical mirror slip in camera lens 30, by repeatedly refraction and the final projection of reflection
Projected image is formed on to projection screen 40.
By the LASER Light Source in Application Example one or embodiment two or embodiment three, LASER Light Source is on the one hand improve
The utilization rate of dissipation spot part, while so that light source compact in architecture, beneficial to the miniaturization of laser projection device.
Although describing the present invention with reference to several exemplary embodiments, it is to be understood that, term used be explanation and
Exemplary and nonrestrictive term.Due to the present invention can be embodied in a variety of forms without deviating from invention spirit or
Essence, it should therefore be appreciated that above-mentioned implementation method is not limited to any foregoing details, and should be limited in appended claims
Widely explains in spirit and scope, thus whole changes for falling into claim or its equivalent scope and remodeling all should be with
Attached claim is covered.
Claims (12)
1. a kind of LASER Light Source, it is characterised in that including：Prefocus cup, the inner side of the prefocus cup is the reflecting surface of concave shaped, institute
The bottom for stating prefocus cup offers light hole；
Transmission-type diffusion disk, is oppositely arranged located at the inner side of the prefocus cup, and the diffusion disk with the light hole, described unrestrained
Penetrate piece surface and be provided with diffuser；
First laser light source for sending the first light beam, located at the outside of the prefocus cup, first light beam is by described
Light hole is incided on the diffusion disk, and is transmitted through the diffusion disk；
Second laser light source for sending the second light beam, located at the inner side of the prefocus cup, second light beam is through described poly-
The reflective surface of light cup, incides on the diffusion disk, and is transmitted through the diffusion disk.
2. LASER Light Source according to claim 1, it is characterised in that also including sending the 3rd laser light of the 3rd light beam
Source, the 3rd LASER Light Source is set up in parallel located at the inner side of the prefocus cup and with the diffusion disk, the 3rd light beam warp
The reflective surface of the prefocus cup, incides on the diffusion disk, and is transmitted through the diffusion disk.
3. LASER Light Source according to claim 1, it is characterised in that the diffusion disk rotary motion.
4. LASER Light Source according to claim 1, it is characterised in that the diffusion disk vibration swings.
5. LASER Light Source according to claim 1, it is characterised in that the reflecting surface of the prefocus cup is parabola, incident
It is that, parallel to the paraboloidal central shaft collimated light beam, the incidence point of the diffusion disk is located at institute in the light beam of the reflecting surface
State paraboloidal focal point.
6. LASER Light Source according to claim 1, it is characterised in that the reflecting surface of the prefocus cup is sphere, it is described unrestrained
Penetrate the focal point of the incidence point located at the sphere of piece.
7. the LASER Light Source according to claim 3 or 4, it is characterised in that the diffusion disk includes the first diffusive regions and the
Two diffusive regions, the first laser light source and second laser light source sequential are lighted, successively incident first diffusive regions and second
Diffusive regions.
8. LASER Light Source according to claim 2, it is characterised in that first light beams colors are blueness, described second
Light beams colors are red, and the 3rd light beams colors are green.
9. a kind of LASER Light Source, it is characterised in that including：
Prefocus cup, the inner side of the prefocus cup is the reflecting surface of concave shaped；
Diffusion disk, located at the inner side of the prefocus cup, the diffusion disk is provided with diffusion towards a side surface of the reflecting surface
Body, and transmitted light beam；
Multigroup LASER Light Source, located at the inner side of the prefocus cup, the light source sends excitation beam, and the excitation beam is through described
On the reflective surface of prefocus cup to the diffusion disk, and transmit outgoing.
10. LASER Light Source according to claim 9, it is characterised in that the multiple sets of light sources include blue laser light source and
Red laser light source.
11. LASER Light Sources according to claim 9, it is characterised in that the multiple sets of light sources includes blue laser light source, red
Color LASER Light Source, green laser light source.
12. a kind of laser projection devices, it is characterised in that including the LASER Light Source described in claim 1-11 any one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611223900.8A CN106773482A (en) | 2016-12-27 | 2016-12-27 | Laser projection device and its LASER Light Source |
| US15/449,883 US20180180251A1 (en) | 2016-12-27 | 2017-03-03 | Laser projection device and laser source thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611223900.8A CN106773482A (en) | 2016-12-27 | 2016-12-27 | Laser projection device and its LASER Light Source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106773482A true CN106773482A (en) | 2017-05-31 |
Family
ID=58926580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611223900.8A Pending CN106773482A (en) | 2016-12-27 | 2016-12-27 | Laser projection device and its LASER Light Source |
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| Country | Link |
|---|---|
| CN (1) | CN106773482A (en) |
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| CN111323376A (en) * | 2020-04-16 | 2020-06-23 | 中国科学院电工研究所 | Parallel incidence infrared thermal radiation photoacoustic spectrum gas sensing device |
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