CN110780525A - Laser light source and laser projector - Google Patents
Laser light source and laser projector Download PDFInfo
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- CN110780525A CN110780525A CN201911074610.5A CN201911074610A CN110780525A CN 110780525 A CN110780525 A CN 110780525A CN 201911074610 A CN201911074610 A CN 201911074610A CN 110780525 A CN110780525 A CN 110780525A
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- dichroic mirror
- adjusting
- light
- light source
- bracket
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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
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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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
- G03B21/2053—Intensity control of illuminating light
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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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- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
Abstract
The invention provides a laser light source and a laser projection apparatus. The laser light source comprises a dichroic mirror, a fluorescent wheel, a reflecting mirror assembly and an adjusting bracket assembly, wherein incident light is reflected by the dichroic mirror to enter the fluorescent wheel to form a first light path and a second light path, the first light path is returned to the dichroic mirror by the fluorescent wheel and forms first emergent light by penetrating through the dichroic mirror, the second light path reaches the reflecting mirror assembly by penetrating through the fluorescent wheel and is returned to the dichroic mirror after being reflected by the reflecting mirror assembly, and second emergent light is formed by being reflected by the dichroic mirror; the adjusting bracket component comprises a first adjusting bracket and a second adjusting bracket, and the first adjusting bracket and the second adjusting bracket are respectively used for adjusting the directions of the dichroic mirror and the reflector component so as to enable the centers of the first emergent light and the second emergent light to coincide. The laser light source has high optical utilization efficiency, and the overall brightness of the laser projection device is high.
Description
Technical Field
The invention relates to the technical field of laser projection, in particular to a laser light source and a laser projection device.
Background
With the continuous progress of science and technology, laser projection devices are increasingly used in family entertainment and work of people due to the advantages of wide color gamut, high color purity and the like.
The laser projection device generally comprises a laser light source, an optical-mechanical component and a lens component, wherein in the existing laser projection device, the laser light source mainly comprises a blue laser, a dichroic mirror, a fluorescent wheel and a plurality of reflecting mirrors. When projection display is carried out, the blue laser emits blue light, the blue light irradiates the fluorescent wheel which rotates rapidly, when the fluorescent wheel rotates to the fluorescent powder area, the blue light can excite the fluorescent powder to generate fluorescent light, the fluorescent wheel can reflect the fluorescent light to the first surface of the dichroic mirror, and the fluorescent light can penetrate through the dichroic mirror and be output from the second surface of the dichroic mirror; when the fluorescent wheel rotates to the transparent area, the blue light can directly penetrate through the fluorescent wheel to enter a blue light path formed by a plurality of reflectors, the blue light path finally transmits the blue light to the second surface of the dichroic mirror and is totally reflected by the second surface, the fluorescence and the blue light on the second surface of the dichroic mirror are converged to form a light source beam, and the light source beam forms an emergent light spot after passing through a lens arranged at the outlet of the laser light source.
However, in the above laser light source, due to the fact that the transmission paths of the blue light path and the fluorescence light path are different, and due to factors such as assembly errors of optical elements, the centers of the two light beams are not overlapped, so that emergent light spots generated by the two light beams converging through the lens are also not overlapped, which affects the optical efficiency and the overall brightness of the laser projection device, and also affects the color coordinate and the color temperature index.
Disclosure of Invention
The invention provides a laser light source and a laser projection device, which have the advantages of good matching between light paths of the laser light source, high optical utilization efficiency and high overall brightness.
On one hand, the invention provides a laser light source, which comprises a dichroic mirror, a fluorescent wheel, a reflector assembly and an adjusting bracket assembly, wherein the dichroic mirror, the fluorescent wheel and the reflector assembly are sequentially arranged on a light transmission path, incident light is reflected by the dichroic mirror to enter the fluorescent wheel to form a first light path and a second light path, the first light path is returned to the dichroic mirror by the fluorescent wheel and forms first emergent light by penetrating through the dichroic mirror, the second light path reaches the reflector assembly by penetrating through the fluorescent wheel and returns to the dichroic mirror after being reflected by the reflector assembly, and second emergent light is formed by being reflected by the dichroic mirror;
the adjusting support assembly comprises a first adjusting support connected with the dichroic mirror and a second adjusting support connected with the reflecting mirror assembly, the first adjusting support is used for adjusting the direction of the dichroic mirror, and the second adjusting support is used for adjusting the direction of the reflecting mirror assembly so as to adjust the first light path and the second light path and enable the light beam centers of the first emergent light and the second emergent light to coincide.
Optionally, the mirror assembly includes a plurality of mirrors sequentially disposed along the second light path, and at least one of the mirrors is connected to the second adjusting bracket.
Optionally, a second adjusting bracket is connected to one of the plurality of mirrors.
Optionally, the laser light source further comprises a casing, the first adjusting support and the second adjusting support are movably arranged on the casing, the dichroic mirror is arranged in the casing through the first adjusting support, one reflector in the reflector assembly is arranged in the casing through the second adjusting support, and the other reflectors are fixed on the inner wall of the casing.
Optionally, first regulation support includes the support body, and the support body sets up at the casing outer wall, and the lateral wall of dichroic mirror is connected with the middle part of support body, and the first end of support body is provided with location portion, and the second end can drive dichroic mirror rotation around location portion.
Optionally, a through groove is formed in the housing, and the dichroic mirror penetrates through the through groove and extends into the housing.
Optionally, the positioning portion is a positioning hole formed in the support body, a positioning column is arranged on the outer wall of the shell, and the positioning column penetrates through the positioning hole.
Optionally, a clamping groove is further formed in the shell, the clamping groove is located on one side where the second end of the bracket body is located, an adjusting clamping block is arranged in the clamping groove, and two sides of the adjusting clamping block are respectively abutted to the side wall of the bracket body and the groove wall of the clamping groove.
Optionally, the second end of the bracket body is further provided with a rotating hole, the outer wall of the shell is provided with a rotating column, and the rotating column penetrates through the rotating hole.
Optionally, the middle part of the bracket body is provided with an operating part protruding outwards.
Optionally, the second adjusting bracket includes a supporting portion and a positioning portion, the reflector is connected to the supporting portion, and the positioning portion is movably connected to the housing.
Optionally, a positioning pin and a plurality of adjusting holes are arranged on the surface of the positioning part facing the shell, and the plurality of adjusting holes are circumferentially distributed on the outer side of the positioning pin;
the shell is provided with a mounting hole and a plurality of connecting holes, the positioning pin is located in the mounting hole, the connecting holes correspond to the adjusting holes one by one, connecting pieces penetrate through the connecting holes and the adjusting holes, and the connecting pieces can adjust the distance between the connecting holes and the adjusting holes.
Optionally, a plurality of adjusting holes are evenly spaced along the circumference of the positioning pin.
In another aspect, the present invention provides a laser projection apparatus, including the laser light source as described above.
The laser source consists of a dichroic mirror, a fluorescent wheel and a reflecting mirror assembly which are sequentially arranged along a light transmission path, incident light is reflected to the fluorescent wheel through the dichroic mirror to form a first light path and a second light path, the first light path returns to the dichroic mirror through the fluorescent wheel and penetrates through the dichroic mirror to form first emergent light, the second light path penetrates through the fluorescent wheel and is transmitted to the reflecting mirror assembly, the second light path returns to the dichroic mirror after being reflected by the reflecting mirror assembly, and the second emergent light is formed by the dichroic mirror through reflection; by arranging the adjusting bracket component in the laser light source, the adjusting bracket component consists of a first adjusting bracket and a second adjusting bracket, wherein the first adjusting bracket is connected with the dichroic mirror, the second adjusting bracket is connected with the reflector component, the first adjusting bracket is used for adjusting the direction of the dichroic mirror, so that the first light path and the second light path are simultaneously changed and the optimal position of the first emergent light can be determined, the second adjusting bracket is used for adjusting the position of the second light path and the optimal position of the second emergent light can be determined, therefore, the first emergent light and the second emergent light can be adjusted to the optimal positions, the light beam centers of the first emergent light and the second emergent light are superposed, the first emergent light and the second emergent light are both positioned at the optimal positions of the light guide entrance, the overall brightness of the laser projection device can be effectively improved, the optical utilization efficiency of the laser light source is improved, and meanwhile, the influence on the display effect caused by stray light introduced by emergent light deviation can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic optical path diagram of a laser light source according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of a first optical path of a laser light source according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a second optical path of a laser light source according to an embodiment of the present invention;
fig. 4 is a front view of a laser light source according to a first embodiment of the invention;
fig. 5 is a bottom view of a laser light source according to a first embodiment of the invention;
FIG. 6 is a schematic view of a first adjusting bracket according to an embodiment of the present invention;
FIG. 7 is a partial schematic view at B of FIG. 6;
FIG. 8 is an exploded view of the installation of a first adjustable bracket according to one embodiment of the present invention;
FIG. 9 is a partial schematic view at A of FIG. 4;
FIG. 10 is a side view of a laser light source according to one embodiment of the present invention;
FIG. 11 is a partial schematic view at C of FIG. 10;
fig. 12 is a partial schematic view of a second adjusting bracket according to an embodiment of the invention after installation.
Description of reference numerals:
1-a dichroic mirror; 2-a fluorescent wheel; 3-a mirror assembly; 31-a mirror; 4-adjusting the bracket assembly; 41-a first adjustment bracket; 411-the stent body; 412-positioning holes; 413-a spin hole; 414-a manipulation section; 415-a fixation hole; 42-a second adjustment bracket; 421-a support portion; 422-a positioning part; 4221-locating pins; 4222-adjusting holes; 5-a shell; 51-through slots; 52-positioning columns; 53-card slot; 54-adjusting the fixture block; 55-spin column; 56-mounting holes; 57-connecting hole; 416. 571-a connecting piece; 58-unthreaded hole holder; 581-unthreaded hole shrapnel; 5811-analog unthreaded holes; 6-incident light; 7-a first light path; 71-first outgoing light; 8-a second light path; 81-second outgoing light; 9-a light guide; 100-a laser; 200-a lens; 210-an exit lens; 300-a diffusion sheet; 400-color filter wheel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 is a schematic optical path diagram of a laser light source according to a first embodiment of the present invention; fig. 2 is a schematic diagram of a first optical path of a laser light source according to an embodiment of the present invention; fig. 3 is a schematic diagram of a second optical path of a laser light source according to an embodiment of the present invention.
Fig. 4 is a front view of a laser light source according to a first embodiment of the invention; fig. 5 is a bottom view of a laser light source according to a first embodiment of the invention; FIG. 6 is a schematic view of a first adjusting bracket according to an embodiment of the present invention; FIG. 7 is a partial schematic view at B of FIG. 6; FIG. 8 is an exploded view of the installation of a first adjustable bracket according to one embodiment of the present invention; FIG. 9 is a partial schematic view at A of FIG. 4; FIG. 10 is a side view of a laser light source according to one embodiment of the present invention; FIG. 11 is a partial schematic view at C of FIG. 10; fig. 12 is a partial schematic view of a second adjusting bracket according to an embodiment of the invention after installation.
As shown in fig. 1 to 12, the present embodiment provides a laser light source, which includes a dichroic mirror 1, a fluorescent wheel 2, a reflector assembly 3, and an adjusting bracket assembly 4, where the dichroic mirror 1, the fluorescent wheel 2, and the reflector assembly 3 are sequentially disposed on a light transmission path, an incident light 6 is reflected by the dichroic mirror 1 and enters the fluorescent wheel 2 to form a first light path 7 and a second light path 8, the first light path 7 is returned to the dichroic mirror 1 by the fluorescent wheel 2 and forms a first outgoing light 71 by penetrating through the dichroic mirror 1, and the second light path 8 reaches the reflector assembly 3 by penetrating through the fluorescent wheel 2 and returns to the dichroic mirror 1 by being reflected by the reflector assembly 3, and forms a second outgoing light 81 by being reflected by the dichroic mirror 1.
The laser light source that this embodiment provided mainly comprises dichroic mirror 1, fluorescence wheel 2, mirror assembly 3 and regulation support subassembly 4, wherein, dichroic mirror 1, fluorescence wheel 2 and mirror assembly 3 set gradually along light transmission path, and the regulation support is used for adjusting light transmission path to correct laser light source's light path deviation, promote laser light source's optics utilization efficiency.
Specifically, as shown in fig. 1 and 2, it is understood that a laser 100 may be provided in the laser light source, the laser 100 emits a light beam to generate incident light 6, the incident light 6 is first transmitted to the dichroic mirror 1, the dichroic mirror 1 reflects the incident light 6 to the fluorescent wheel 2, a portion of the incident light 6 enters the fluorescent wheel 2 to form a first light path 7, the incident light 6 forming the first light path 7 is returned to the dichroic mirror 1 by the fluorescent wheel 2, and the portion of the incident light 6 returning to the dichroic mirror 1 along the first light path 7 may permeate the dichroic mirror 1 and form first outgoing light 71.
As shown in fig. 1 and fig. 3, the rest of the incident light 6 enters the fluorescent wheel 2 to form a second light path 8, the incident light 6 forming the second light path 8 is transmitted to the reflecting mirror assembly 3 through the fluorescent wheel 2, the second light path 8 returns to the dichroic mirror 1 after being reflected by the reflecting mirror assembly 3, and the dichroic mirror 1 reflects the second light path 8 to form a second emergent light 81.
As shown in fig. 1, the first outgoing light 71 and the second outgoing light 81 are converged to form outgoing light, and the outgoing light can be transmitted to the light guide 9 in the optical-mechanical assembly along an outgoing light path. In this embodiment, taking incident light 6 as blue light as an example, the blue light beam is transmitted to dichroic mirror 1, dichroic mirror 1 can reflect the blue light beam to fluorescent wheel 2, wherein a part of the blue light beam can excite the phosphor on fluorescent wheel 2 and generate fluorescence, thereby forming first light path 7, that is, first light path 7 can be a fluorescent light path, the fluorescent light path returns to dichroic mirror 1 through fluorescent wheel 2, and the fluorescent light beam can penetrate dichroic mirror 1, the fluorescent light beam penetrating dichroic mirror 1 forms first emergent light 71, and first emergent light 71 is transmitted to light guide 9.
Another part of blue light beam transmitted to the fluorescent wheel 2 can be directly transmitted to the reflector assembly 3 through the wheel body of the fluorescent wheel 2, thereby forming a second light path 8, that is, the second light path 8 can be a blue light path, the blue light path returns to the dichroic mirror 1 after being reflected by the reflector 31, the dichroic mirror 1 can reflect the blue light beam to form a second emergent light 81, and the second emergent light 81 is transmitted to the light guide 9. In this embodiment, the first outgoing light 71 may be a fluorescent light beam, and the second outgoing light 81 may be a blue light beam, and the fluorescent light beam and the blue light beam are converged and transmitted to the light guide 9.
In addition, as shown in fig. 2 and fig. 3, the laser light source of the present embodiment may further include a plurality of optical lenses such as a lens 200, a diffusion sheet 300, and a color filter wheel 400, for example, one lens 200 may be disposed behind the laser 100 to converge the blue light beam emitted from the laser 100 through the lens 200, so as to make the light beam more concentrated; on the light path of the light beam transmitted from the laser 100 to the dichroic mirror 1, a lens 200 and a diffusion sheet 300 may be further sequentially disposed at a position close to the dichroic mirror 1, the lens 200 further converges the light beam emitted from the laser 100, and the light beam entering the dichroic mirror 1 is more uniform through the diffusion sheet 300.
Along the light path propagation path, all can set up multiunit lens 200 in the front and back of fluorescence wheel 2, the light beam that reflects to fluorescence wheel 2 by dichroic mirror 1 at first gets into fluorescence wheel 2 after the convergence of lens 200, and the blue light beam that sees through fluorescence wheel 2 forms comparatively even blue light beam after the lens 200 behind fluorescence wheel 2 diverges.
In addition, as shown in fig. 2 and 3, a lens 200 may be disposed between two adjacent mirrors 31 of the mirror assembly 3, and the lens 200 serves to homogenize the light beam. The first outgoing light 71 and the second outgoing light 81 are converged and then pass through an exit lens 210 arranged at a light exit of the laser light source, the exit lens 210 performs light condensation processing on a light beam formed by converging the first outgoing light 71 and the second outgoing light 81, the light beam is condensed by the exit lens 210 to form outgoing light of the laser light source, and the outgoing light enters the light guide 9 after being filtered by the color filter 400.
Because the first light path 7 and the second light path 8 pass through different paths, and both paths have errors, when the first outgoing light 71 formed by the first light path 7 and the second outgoing light 81 formed by the second light path 8 pass through the lens of the light outlet of the laser light source, the directions and positions of the first outgoing light 71 and the second outgoing light 81 may be different, and the first outgoing light 71 and the second outgoing light 81 may not be in the optimal positions of the first outgoing light 71 and the second outgoing light 81, which may affect the optical utilization efficiency of the laser light source, may reduce the overall brightness of the laser projection apparatus, and may emit part of the light beams of the first outgoing light 71 and the second outgoing light 81 onto the side wall of the light guide 9, which may introduce stray light, thereby affecting the display effect of the laser projection apparatus.
Therefore, in this embodiment, an adjusting bracket assembly 4 is further disposed in the laser light source, and the adjusting bracket assembly 4 is used to adjust transmission paths of the first light path 7 and the second light path 8, so that positions of the first outgoing light 71 and the second outgoing light 81 can be adjusted, the first outgoing light 71 and the second outgoing light 81 are kept consistent, and brightness of the laser light source is effectively improved.
The adjusting bracket assembly 4 includes a first adjusting bracket 41 connected to the dichroic mirror 1 and a second adjusting bracket 42 connected to the mirror assembly 3, the first adjusting bracket 41 is used for adjusting the orientation of the dichroic mirror 1, and the second adjusting bracket 42 is used for adjusting the orientation of the mirror assembly 3, so as to adjust the first light path 7 and the second light path 8 and enable the first outgoing light 71 and the second outgoing light 81 to coincide.
As shown in fig. 4 to 11, adjusting bracket assembly 4 includes first adjusting bracket 41 and second adjusting bracket 42, first adjusting bracket 41 is connected to dichroic mirror 1, first adjusting bracket 41 is used to adjust the orientation of dichroic mirror 1, second adjusting bracket 42 is connected to mirror assembly 3, and second adjusting bracket 42 is used to adjust the orientation of mirror 31, so that the directions and positions of first outgoing light 71 and second outgoing light 81 can be adjusted by adjusting the orientations of dichroic mirror 1 and mirror assembly 3 through first adjusting bracket 41 and second adjusting bracket 42, and the transmission paths of first optical path 7 and second optical path 8 can be adjusted, so that first outgoing light 71 and second outgoing light 81 are overlapped, and first outgoing light 71 and second outgoing light 81 are both in the optimal positions.
It should be noted that, since the transmission paths of the first light path 7 and the second light path 8 can be changed simultaneously by adjusting the dichroic mirror 1, in a specific implementation process, the position of the dichroic mirror 1 can be adjusted by the first adjusting bracket 41 first, so that the first outgoing light 71 emitted from the first light path 7 is at an optimal position, and thus, the direction and the position of the first outgoing light 71 can be determined first, and then the position of the reflector assembly 3 is adjusted by the second adjusting bracket 42, so that the second outgoing light 81 emitted from the second light path 8 coincides with the first outgoing light 71, and both the second outgoing light 81 and the first outgoing light 71 are at optimal positions. For example, when the first outgoing light 71 and the second outgoing light 81 are at the optimal positions, they are overlapped, and the converged first outgoing light 71 and second outgoing light 81 are at the optimal positions at the entrance of the light guide 9.
For example, as shown in fig. 4 and fig. 5, in practical applications, in order to determine the optimal positions of the first outgoing light 71 and the second outgoing light 81, when the orientations of the dichroic mirror 1 and the mirror assembly 3 are adjusted by the first adjusting bracket 41 and the second adjusting bracket 42, respectively, an aperture bracket 58 may be disposed at a theoretical position where the laser light source and the light guide 9 of the opto-mechanical assembly cooperate with each other, an aperture spring 581 may be disposed on the aperture bracket 58, a simulated aperture 5811 may be disposed on the aperture spring 581 corresponding to the aperture position of the light guide 9, and a power meter may be disposed at a specific position according to a calculation. The first adjusting bracket 41 and the second adjusting bracket 42 are used for adjusting the orientations of the dichroic mirror 1 and the reflector component 3 respectively, so that the first emergent light 71 and the second emergent light 81 are infinitely close to the center of the simulated light hole 5811, and the value of the power meter is close to an ideal maximum value, namely, the optimal position of the overall brightness of the laser projection device and the optimal position for avoiding the generation of stray light.
As shown in fig. 1 to 4, in a possible embodiment, the mirror assembly 3 may include a plurality of mirrors 31 sequentially disposed along the second light path 8, and a second adjusting bracket 42 is connected to at least one of the mirrors 31. In this embodiment, the mirror assembly 3 is composed of a plurality of mirrors 31, the plurality of mirrors 31 are sequentially disposed on the fluorescent wheel 2 on the light transmission path, and then the blue light beam passing through the fluorescent wheel 2 is transmitted along the second light path 8, and after being reflected by each mirror assembly 3 sequentially disposed on the second light path 8, the blue light beam returns to the dichroic mirror 1 and is reflected by the dichroic mirror 1 to form the second outgoing light 81.
Illustratively, as shown in fig. 1 to 4, the mirror assembly 3 may include three mirrors 31, adjacent mirrors 31 are perpendicular to each other, and the last mirror 31 on the second optical path 8 is parallel to the dichroic mirror 1 and is located at the same front-back position, so that the mirror 31 can reflect the blue light beam to the dichroic mirror 1.
As for the arrangement manner of the second adjusting bracket 42 in the mirror assembly 3, the second adjusting bracket 42 may be arranged on at least one mirror 31 in the mirror assembly 3 to adjust the orientation of the corresponding mirror 31 through the second adjusting bracket 42, and adjust the whole second light path 8 so that the second outgoing light 81 formed after being reflected to the dichroic mirror 1 by the second light path 8 coincides with the first outgoing light 71 and the second outgoing light 81 is at the optimal position.
Preferably, a second adjusting bracket 42 may be coupled to one mirror 31 among the plurality of mirrors 31. In this embodiment, the second adjusting bracket 42 may be disposed on only one mirror 31 of the plurality of mirrors 31 of the mirror assembly 3, and the orientation of the one mirror 31 is adjusted by the second adjusting bracket 42, so that the entire second optical path 8 may be adjusted, and only one mirror 31 needs to be adjusted, which is relatively simple in adjustment manner; the second adjusting bracket 42 is prevented from being connected to a plurality of reflectors 31, and the second light path 8 can be changed by changing the orientation of one reflector 31, so that the second light path 8 cannot be adjusted to be optimal by adjusting the plurality of reflectors 31, and the second light path 8 can be adjusted to be the optimal path by only arranging one second adjusting bracket 42 and changing the orientation of one reflector 31.
In addition, since the second adjusting bracket 42 is only required to be connected to one reflector 31 of the reflectors 31, the space of the laser light source occupied by the second adjusting bracket 42 is small, the installation and the disassembly are convenient, the operation is simpler and more convenient, and the cost can be saved.
As shown in fig. 1 to 4, optionally, the laser light source may further include a housing 5, the first adjusting bracket 41 and the second adjusting bracket 42 are movably disposed on the housing 5, the dichroic mirror 1 is disposed in the housing 5 through the first adjusting bracket 41, one of the mirrors 31 in the mirror assembly 3 is disposed in the housing 5 through the second adjusting bracket 42, and the other mirrors 31 are fixed on an inner wall of the housing 5.
Laser source includes casing 5, and casing 5 forms laser source's main part bearing structure, and dichroic mirror 1, fluorescent wheel 2 and a plurality of speculum 31 all are located casing 5 to form first light path 7 and second light path 8 in laser source's casing 5, as before, can be provided with the light-emitting window on the casing 5, the light pipe 9 of optical engine subassembly corresponds the setting in the light-emitting window outside, and first emergent light 71 that first light path 7 and second light path 8 formed respectively through dichroic mirror 1 and second emergent light 81 assemble the emergent light accessible light-emitting window that the back formed and penetrate into light pipe 9.
In the present embodiment, both the first adjusting holder 41 for supporting the dichroic mirror 1 and the second adjusting holder 42 for supporting the reflecting mirror 31 are provided on the housing 5, and the first adjusting holder 41 and the second adjusting holder 42 are movable relative to the housing 5. Therefore, dichroic mirror 1 is arranged in housing 5 through first adjusting bracket 41, when first adjusting bracket 41 moves relative to housing 5, the orientation of dichroic mirror 1 can be adjusted, similarly, reflecting mirror 31 is arranged in housing 5 through second adjusting bracket 42, when second adjusting bracket 42 moves relative to housing 5, the orientation of reflecting mirror 31 can be adjusted, and further the orientations of dichroic mirror 1 and reflecting mirror 31 are respectively adjusted through first adjusting bracket 41 and second adjusting bracket 42, namely the paths of first light path 7 and second light path 8 can be adjusted, the directions and positions of first emergent light 71 and second emergent light 81 are adjusted, so that first emergent light 71 and second emergent light 81 are overlapped, and first emergent light 71 and second emergent light 81 are both in the optimal positions.
It will be appreciated that in the case where only one mirror 31 of the plurality of mirrors 31 in the mirror assembly 3 is coupled to the second adjustment bracket 42, the mirror 31 coupled to the second adjustment bracket 42 may be movable relative to the housing 5, and the remaining mirrors 31 may be fixedly coupled to the inner wall of the housing 5.
As shown in fig. 6 and 7, in one possible embodiment, the first adjusting bracket 41 may include a bracket body 411, the bracket body 411 is disposed on the outer wall of the housing 5, the side wall of the dichroic mirror 1 is connected to the middle of the bracket body 411, the first end of the bracket body 411 is provided with a positioning portion, and the second end can drive the dichroic mirror 1 to rotate around the positioning portion.
The major structure of the first regulation support 41 that is used for fixing dichroic mirror 1 is support body 411, and support body 411 sets up on casing 5 outer wall, the middle part fixed connection of the lateral wall of dichroic mirror 1 in the casing 5 and support body 411, and support body 411 can remove casing 5 relatively, and support body 411 can drive dichroic mirror 1 and remove like this, through setting up support body 411 at casing 5 outer wall, and the operator of being convenient for adjusts the position of dichroic mirror 1 through adjusting support body 411.
For example, the holder body 411 may be perpendicular to the side wall of the dichroic mirror 1, the middle portion of the holder body 411 is connected to the dichroic mirror 1, and both sides of the middle portion of the holder body 411 are connected to the outer wall of the case 5. Wherein, the first end of support body 411, one side of support body 411 is provided with location portion promptly, and the second end that is located the opposite side of support body 411 then can be around location portion rotation to can drive the rotation of dichroic mirror 1 in the casing 5, with the position adjustment to best position of dichroic mirror 1.
Optionally, as shown in fig. 7, a through groove 51 may be further disposed on the housing 5, and the dichroic mirror 1 extends into the housing 5 through the through groove 51. A through groove 51 is opened at a position of the case 5 corresponding to the dichroic mirror 1, the dichroic mirror 1 passes through the through groove 51 to enter the inside of the case 5, and a holder body 411 of the first adjusting holder 41 is disposed on an outer wall of the case 5, and a middle portion of the holder body 411 covers at least a part of the through groove 51. It is understood that the size of the through groove 51 may be larger than the size of the dichroic mirror 1, i.e. there is a gap between the dichroic mirror 1 and the groove wall of the through groove 51, in order to make the dichroic mirror 1 pass smoothly through the through groove 51 into the inside of the housing 5.
Specifically, as shown in fig. 7 and 8, the positioning portion may be a positioning hole 412 formed on the bracket body 411, a positioning column 52 is disposed on an outer wall of the housing 5, and the positioning column 52 is inserted into the positioning hole 412. The positioning portion of the first end of the bracket body 411 may specifically be the positioning hole 412, the portion of the housing 5 corresponding to the positioning hole 412 is provided with the positioning column 52 protruding outward of the housing 5, the positioning column 52 is inserted into the positioning hole 412, and the second end of the bracket body 411 can rotate around the positioning column 52, so that the dichroic mirror 1 can be driven to rotate to adjust the position of the dichroic mirror 1.
In addition, the housing 5 may further be provided with a locking groove 53, the locking groove 53 is located at one side of the second end of the holder body 411, an adjusting locking block 54 is disposed in the locking groove 53, and two sides of the adjusting locking block 54 are respectively abutted to the side wall of the holder body 411 and the groove wall of the locking groove 53.
As shown in fig. 7 and 8, the outer wall of the housing 5 is provided with the engaging groove 53, and the engaging groove 53 is located at one side of the second end of the holder body 411, and after the adjusting latching block 54 is disposed in the engaging groove 53 and the second end of the holder body 411 is rotated to a proper position, the adjusting latching block 54 is engaged between the second end of the holder body 411 and the engaging groove 53, that is, two sides of the adjusting latching block 54 are respectively abutted against the side wall of the holder body 411 and the groove wall of the engaging groove 53, so as to fix the relative position of the second end of the holder body 411, and the holder body 411 is located at the optimal position.
It should be noted that, according to the specific size of the gap between the second end of the holder body 411 and the groove wall of the slot 53, the adjusting latch 54 with corresponding size is provided to ensure that the two sides of the adjusting latch 54 are just abutted against the side wall of the holder body 411 and the groove wall of the slot 53, so as to limit the second end of the holder body 411 at the required position.
Further, as shown in fig. 7 and 8, the second end of the holder body 411 may further be provided with a rotation hole 413, the outer wall of the housing 5 is provided with a rotation column 55, and the rotation column 55 is inserted into the rotation hole 413. In this embodiment, a rotation hole 413 is further disposed at the second end of the holder body 411, after the holder body 411 is adjusted to a proper position, on the basis that the relative position of the holder body 411 is defined by the adjusting fixture block 54, a rotation column 55 protruding toward the outside of the housing 5 may be disposed at a position of the housing 5 corresponding to the rotation hole 413, so that the second end of the holder body 411 can be fixed at the corresponding position by the way that the rotation column 55 is inserted into the rotation hole 413.
Specifically, the rotating hole 413 on the holder body 411 may be set to be an oblong hole, so that under the condition that the rotating hole 413 is sleeved outside the rotating column 55, since a gap is formed between the rotating hole 413 and the rotating column 55, the holder body 411 may move relative to the rotating column 55, and the position of the holder body 411 may be adjusted by finely adjusting the position of the rotating hole 413, thereby adjusting the orientation of the dichroic mirror 1.
In practical applications, when determining whether the second end of the holder body 411 is located at the optimal position, the adjusting latch 54 with different specifications may be inserted into the slot 53, and when the adjusting latch 54 with a certain specification is inserted, the value of the power meter is at the maximum value compared with the adjusting latch 54 with another specification, which indicates that the holder body 411 is located at the optimal position currently, that is, the position of the holder body 411 may be fixed by sleeving the rotating hole 413 on the rotating column 55.
After the position of the holder body 411 is adjusted, the first adjusting holder 41 can be completely fixed to the housing 5 by providing the fixing holes 415 on the left and right sides of the holder body 411, respectively inserting the fixing holes 415 through the left and right sides of the holder body 411, so that the fixing holes 415 can penetrate the housing 5, and screwing the fastening members 416 such as screws or bolts into the fixing holes 415.
In addition, as shown in fig. 7 and 8, the middle of the holder body 411 may have a manipulation part 414 protruding outward. By providing the middle of the holder body 411 with the manipulation part 414 protruding from the outer wall of the housing 5, it is convenient for an operator to rotate the holder body 411 through the manipulation part 414 and adjust the holder body 411 to a proper position.
As shown in fig. 9 to 12, in one possible embodiment, the second adjusting bracket 42 may include a supporting portion 421 and a positioning portion 422, the reflecting mirror 31 is connected to the supporting portion 421, and the positioning portion 422 is movably connected to the housing 5. The second adjusting bracket 42 is integrally located in the housing 5 and connected to the housing 5, the second adjusting bracket 42 is specifically composed of a supporting portion 421 and a fixing portion, the reflector 31 is fixedly connected to the supporting portion 421, and the orientation of the second adjusting bracket 42 can be adjusted through the movable connection between the positioning portion 422 and the housing 5, so that the orientation of the reflector 31 can be adjusted.
Specifically, as shown in fig. 9 and 11, a surface of the positioning portion 422 facing the housing 5 may be provided with a positioning pin 4221 and a plurality of adjustment holes 4222, the plurality of adjustment holes 4222 being distributed circumferentially outside the positioning pin 4221; the housing 5 may be provided with a mounting hole 56 and a plurality of connecting holes 57, the positioning pins 4221 are located in the mounting hole 56, the connecting holes 57 correspond to the adjusting holes 4222 one by one, and the connecting pieces 571 penetrate through the connecting holes 57 and the adjusting holes 4222 and can adjust the distance between the connecting holes 57 and the adjusting holes 4222.
By providing the positioning pin 4221 and the plurality of adjusting holes 4222 on the surface of the positioning portion 422 of the second adjusting bracket 42 facing the housing 5, and distributing the adjusting holes 4222 on the outer side of the positioning pin 4221 along the circumferential direction, and correspondingly, the housing 5 is provided with the mounting hole 56 and the plurality of connecting holes 57, the position of the mounting hole 56 corresponds to the positioning pin 4221, and when the second adjusting bracket 42 is connected with the housing 5, the positioning pin 4221 is located in the mounting hole 56 to fix the relative position of the second adjusting bracket 42 in the housing 5. The plurality of connection holes 57 of the housing 5 correspond to the plurality of adjustment holes 4222 of the second adjustment bracket 42 one by one, and a connection member 571 is inserted into each of the connection holes 57 and the adjustment holes 4222, so that the second adjustment bracket 42 can be further fixed to the housing 5.
The connecting member 571 can adjust the distance between the connecting hole 57 and the adjusting hole 4222, since the connecting hole 57 and the adjusting hole 4222 are distributed in a plurality in the circumferential direction, the orientation of the second adjusting bracket 42 can be changed by adjusting the distance between the connecting hole 57 and the adjusting hole 4222 at a certain position, and the orientation of the second adjusting bracket 42 can be changed in multiple dimensions by adjusting the distances between the connecting hole 57 and the adjusting hole 4222 at different positions, so that the reflecting mirror 31 can be adjusted to the optimal position.
For example, as shown in fig. 12, the connection hole 57 and the adjustment hole 4222 may be both threaded holes, the connection member 571 may be an adjustment screw, the distance between the connection hole 57 and the adjustment hole 4222 can be adjusted by changing the position of the adjustment screw screwed into the adjustment hole 4222, and the distance between the connection hole 57 and the adjustment hole 4222 at different positions can be adjusted by adjusting the position of the screw screwed into the adjustment hole 4222 at different positions, so that the orientation of the second adjustment bracket 42 can be adjusted in multiple dimensions in the circumferential direction of the fixing portion to determine the optimal position of the second adjustment bracket 42.
In one embodiment, the plurality of adjustment holes 4222 may be uniformly spaced apart in the circumferential direction of the positioning pin 4221. By making the plurality of adjustment holes 4222 be provided at regular intervals in the circumferential direction outside the positioning pins 4221, and correspondingly, the attachment holes 57 on the housing 5 be provided at regular intervals in the circumferential direction outside the mounting holes 56, it is possible to perform all-around adjustment in the circumferential direction of the second adjustment bracket 42 by adjusting the intervals between the attachment holes 57 and the adjustment holes 4222 in all directions, so as to ensure that the second adjustment bracket 42 can be located at the optimum position.
For example, four adjustment holes 4222 may be provided at even intervals in the circumferential direction outside the positioning pin 4221, and the four-directional adjustment holes 4222 ensure the circumferential all-around adjustment of the second adjustment bracket 42. It should be noted that the distance between the adjusting hole 4222 and the positioning pin 4221 should be reasonable, so as to avoid that the adjusting range of the second adjusting bracket 42 is too small and the second adjusting bracket 42 cannot be adjusted to the optimal position due to too small distance between the adjusting hole 4222 and the positioning pin 4221.
As for the determination of the optimal position of the second adjusting bracket 42, like the first adjusting bracket 41, during the adjustment of the second adjusting bracket 42, when it is adjusted to a certain position, the value of the power meter reaches the maximum and approaches the theoretical value, which indicates that the position is the optimal position of the second adjusting bracket 42.
The laser light source provided by this embodiment is composed of a dichroic mirror, a fluorescent wheel and a reflector assembly, which are sequentially arranged along a light transmission path, incident light is reflected to the fluorescent wheel through the dichroic mirror to form a first light path and a second light path, the first light path is returned to the dichroic mirror through the fluorescent wheel and forms first emergent light through the dichroic mirror, the second light path penetrates through the fluorescent wheel and is transmitted to the reflector assembly, is reflected by the reflector assembly, returns to the dichroic mirror, and is reflected by the dichroic mirror to form second emergent light; by arranging the adjusting bracket component in the laser light source, the adjusting bracket component consists of a first adjusting bracket and a second adjusting bracket, wherein the first adjusting bracket is connected with the dichroic mirror, the second adjusting bracket is connected with the reflector component, the first adjusting bracket is used for adjusting the direction of the dichroic mirror, so that the first light path and the second light path are simultaneously changed and the optimal position of the first emergent light can be determined, the second adjusting bracket is used for adjusting the position of the second light path and the optimal position of the second emergent light can be determined, therefore, the first emergent light and the second emergent light can be adjusted to the optimal positions and are combined together, so that the first emergent light and the second emergent light are both positioned at the optimal positions of the light guide entrance, the overall brightness of the laser projection device can be effectively improved, the optical utilization efficiency of the laser light source is improved, and meanwhile, the influence on the display effect caused by stray light introduced by emergent light deviation can be avoided.
Example two
The present embodiment provides a laser projection apparatus, which includes the laser light source of the first embodiment. The laser projection apparatus of this embodiment mainly includes a laser light source, an optical-mechanical component, and a lens component, where specific structures, functions, and working principles of the laser light source have been described in detail in the first embodiment, and are not described herein again.
Specifically, the optical-mechanical assembly may include a lens, a light guide 9 and other components, the laser light source is used for emitting laser light and forming a light source light path, the light source passes through the lens after emitting, the lens condenses the light source, the light path retransmits to the light guide 9, the light guide 9 may homogenize the light source, the laser projection device may further include a light valve, and the light valve receives the emergent light of the light guide 9 and projects the emergent light into a lens for imaging.
In the laser light source and the laser projection apparatus provided in this embodiment, the laser light source is composed of a dichroic mirror, a fluorescent wheel, and a reflecting mirror assembly sequentially arranged along a light transmission path, incident light is reflected to the fluorescent wheel by the dichroic mirror to form a first light path and a second light path, the first light path is returned to the dichroic mirror by the fluorescent wheel and penetrates through the dichroic mirror to form first emergent light, the second light path penetrates through the fluorescent wheel and is transmitted to the reflecting mirror assembly, is reflected by the reflecting mirror assembly, returns to the dichroic mirror, and is reflected by the dichroic mirror to form second emergent light; by arranging the adjusting bracket component in the laser light source, the adjusting bracket component consists of a first adjusting bracket and a second adjusting bracket, wherein the first adjusting bracket is connected with the dichroic mirror, the second adjusting bracket is connected with the reflector component, the first adjusting bracket is used for adjusting the direction of the dichroic mirror, so that the first light path and the second light path are simultaneously changed and the optimal position of the first emergent light can be determined, the second adjusting bracket is used for adjusting the position of the second light path and the optimal position of the second emergent light can be determined, therefore, the first emergent light and the second emergent light can be adjusted to the optimal positions and combined together, so that the first emergent light and the second emergent light are both positioned at the optimal positions of the light guide pipe inlet, the overall brightness of the laser projection device can be effectively improved, the optical utilization efficiency of the laser light source is improved, and meanwhile, the influence on the display effect caused by stray light introduced by emergent light deviation can be avoided.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (14)
1. A laser light source is characterized by comprising a dichroic mirror, a fluorescent wheel, a reflector component and an adjusting bracket component, wherein the dichroic mirror, the fluorescent wheel and the reflector component are sequentially arranged on a light transmission path, incident light is reflected by the dichroic mirror to enter the fluorescent wheel to form a first light path and a second light path, the first light path is returned to the dichroic mirror by the fluorescent wheel and penetrates through the dichroic mirror to form first emergent light, the second light path penetrates through the fluorescent wheel to reach the reflector component, is reflected by the reflector component to return to the dichroic mirror, and is reflected by the dichroic mirror to form second emergent light;
the adjusting bracket assembly comprises a first adjusting bracket connected with the dichroic mirror and a second adjusting bracket connected with the reflecting mirror assembly, the first adjusting bracket is used for adjusting the direction of the dichroic mirror, and the second adjusting bracket is used for adjusting the direction of the reflecting mirror assembly so as to adjust the first light path and the second light path and enable the light beam centers of the first emergent light and the second emergent light to coincide.
2. The laser light source of claim 1, wherein the mirror assembly comprises a plurality of mirrors disposed in sequence along the second optical path, at least one of the mirrors having the second adjustment bracket attached thereto.
3. The laser light source of claim 2, wherein the second adjustment bracket is coupled to one of the plurality of mirrors.
4. The laser light source of claim 3, further comprising a housing, wherein the first adjusting bracket and the second adjusting bracket are movably disposed on the housing, the dichroic mirror is disposed in the housing through the first adjusting bracket, one of the mirrors in the mirror assembly is disposed in the housing through the second adjusting bracket, and the rest of the mirrors are fixed on the inner wall of the housing.
5. The laser light source according to claim 4, wherein the first adjusting bracket includes a bracket body, the bracket body is disposed on an outer wall of the housing, a side wall of the dichroic mirror is connected to a middle portion of the bracket body, a first end of the bracket body is provided with a positioning portion, and a second end of the bracket body can drive the dichroic mirror to rotate around the positioning portion.
6. The laser light source according to claim 5, wherein a through groove is provided on the housing, and the dichroic mirror protrudes into the housing through the through groove.
7. The laser light source of claim 5, wherein the positioning portion is a positioning hole formed in the bracket body, and a positioning column is disposed on an outer wall of the housing and penetrates through the positioning hole.
8. The laser light source of claim 7, wherein the housing further comprises a locking groove, the locking groove is located on a side where the second end of the holder body is located, an adjusting block is disposed in the locking groove, and two sides of the adjusting block are respectively abutted against the side wall of the holder body and the groove wall of the locking groove.
9. The laser light source of claim 8, wherein the second end of the bracket body is further provided with a rotating hole, and the outer wall of the housing is provided with a rotating column, and the rotating column is arranged in the rotating hole in a penetrating manner.
10. The laser light source according to any one of claims 5 to 9, wherein the holder body has a manipulation portion protruding outward in a middle portion thereof.
11. The laser light source of claim 4, wherein the second adjusting bracket comprises a supporting portion and a positioning portion, the reflector is connected to the supporting portion, and the positioning portion is movably connected to the housing.
12. The laser light source according to claim 11, wherein a surface of the positioning portion facing the housing is provided with a positioning pin and a plurality of adjusting holes, and the plurality of adjusting holes are distributed outside the positioning pin in a circumferential direction;
the shell is provided with a mounting hole and a plurality of connecting holes, the positioning pin is located in the mounting hole, the connecting holes correspond to the adjusting holes one to one, connecting pieces penetrate through the connecting holes and the adjusting holes, and the connecting pieces can adjust the distance between the connecting holes and the adjusting holes.
13. The laser light source according to claim 12, wherein a plurality of the adjustment holes are provided at regular intervals in a circumferential direction of the positioning pin.
14. A laser projection device comprising the laser light source of any one of claims 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911074610.5A CN110780525A (en) | 2019-11-06 | 2019-11-06 | Laser light source and laser projector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911074610.5A CN110780525A (en) | 2019-11-06 | 2019-11-06 | Laser light source and laser projector |
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| CN110780525A true CN110780525A (en) | 2020-02-11 |
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| CN201911074610.5A Pending CN110780525A (en) | 2019-11-06 | 2019-11-06 | Laser light source and laser projector |
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| CN113075850A (en) * | 2020-12-23 | 2021-07-06 | 深圳市安华光电技术有限公司 | Reflector adjusting mechanism, projection optical machine and projector |
| CN113204124A (en) * | 2021-04-28 | 2021-08-03 | 苏州赛源光学科技有限公司 | Wave mixer |
| CN118346948A (en) * | 2024-05-21 | 2024-07-16 | 深圳市华怡丰科技有限公司 | Laser adjusting mechanism |
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