CN210376994U - Laser light source device - Google Patents
Laser light source device Download PDFInfo
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- CN210376994U CN210376994U CN201921243550.0U CN201921243550U CN210376994U CN 210376994 U CN210376994 U CN 210376994U CN 201921243550 U CN201921243550 U CN 201921243550U CN 210376994 U CN210376994 U CN 210376994U
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Abstract
The utility model provides a laser light source device, include: a laser light source configured to generate excitation light; a wavelength conversion device comprising a wavelength conversion partition configured to wavelength convert the excitation light to produce stimulated light and a reflective partition configured to reflect the excitation light to form reflected excitation light; a dichroic element disposed between the laser light source and the wavelength conversion device, the dichroic element including a first region configured to transmit the excitation light and reflect the stimulated light, and a second region configured to reflect the stimulated light and the reflected excitation light; an optical path guiding unit disposed between the dichroic element and the wavelength conversion device, configured to guide a direction of the excitation light and the reflected excitation light. According to the utility model provides a laser light source device, it is right the exciting light carries out wavelength conversion and reflection, utilizes the direction of light path guide unit guide light, has improved laser light source device's efficiency, has reduced laser light source device's volume.
Description
Technical Field
The utility model relates to an optics field particularly relates to a laser light source device.
Background
The laser light source has the advantages of high color gamut, high brightness and the like when being used as a projection display light source, and along with the development of laser technology, a laser projection display device is more and more widely applied. In the present laser projection display device, most of laser light source systems adopt a laser excitation phosphor light-emitting mode to realize illumination of the projection system, and the specific implementation mode is as follows: the light source system processes light from the light emitting unit mainly through the phosphor color wheel and the dichroic mirror sheet to emit light beams having desired wavelengths, such as light beams having red, green, and blue light.
However, the light blocked by the dichroic mirror is not fully utilized, making the light engine less light efficient. In addition, in order to generate one or more light source beams having three colors, i.e., red, green, and blue, the conventional laser projection apparatus uses a complicated light source structure, and for example, at least four dichroic elements are required to generate one light beam having three colors, so that the volume of the light engine is large, and the volume of the laser projection display apparatus is also large.
Therefore, a new laser light source device is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.
The utility model provides a laser light source device, include:
a laser light source configured to generate excitation light;
a wavelength conversion device comprising a wavelength conversion partition configured to wavelength convert the excitation light to produce stimulated light and a reflective partition configured to reflect the excitation light to form reflected excitation light;
a dichroic element disposed between the laser light source and the wavelength conversion device, the dichroic element including a first region configured to transmit the excitation light and reflect the stimulated light, and a second region configured to reflect the stimulated light and the reflected excitation light;
an optical path guiding unit disposed between the dichroic element and the wavelength conversion device, configured to guide a direction of the excitation light and the reflected excitation light.
Further, the first region is configured to transmit light having a shorter wavelength and reflect light having a longer wavelength, and the second region is configured to reflect the light having the shorter wavelength and the light having the longer wavelength.
Further, the first region is located at a central portion of the dichroic element, and the second region is located at an edge portion of the dichroic element.
Further, the surface of the reflective partition is a triangular step reflective layer to separate the excitation light from the reflected excitation light.
Further, an included angle between the incident direction of the excitation light and the exit direction of the excitation light is 120 ° to 150 °.
Further, the optical path guiding unit is configured to cause the reflected excitation light to be incident on a second region of the dichroic element.
Further, the light path guide unit includes total internal reflection lens, the central zone of total internal reflection lens is convex lens, the marginal zone of total internal reflection lens is the bowl shape, the one end of total internal reflection lens opening broad is close to dichroic element, the other end is close to wavelength conversion device.
Further, the laser light source device further includes:
a lens unit configured to condense the reflected excitation light and the stimulated light.
Further, the wavelength conversion device comprises a rotary base body and a driving element for driving the base body to rotate, wherein the base body is of a barrel-type rotating wheel structure or a disc-type rotating wheel structure.
According to the utility model provides a laser light source device sets up wavelength conversion subregion and reflection subregion in order to right on wavelength conversion device exciting light carries out wavelength conversion and reflection, utilizes light path guide unit to guide the direction of exciting light through the reflection, and then closes the bundle with exciting light through the reflected exciting light and jets out, has improved laser light source device's efficiency, has reduced laser light source device's volume.
Drawings
The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles and devices of the invention. In the drawings, there is shown in the drawings,
fig. 1 is a schematic view of a laser light source device according to the present invention;
fig. 2 is a schematic diagram of a dichroic element of the present invention;
fig. 3 is a schematic view of a wavelength conversion device according to the present invention;
fig. 4 is a cross-sectional view of a reflection partition of a wavelength conversion device according to the present invention.
Reference numerals
1. Laser light source 2 and dichroic element
3. Optical path guide unit 4 and wavelength conversion device
5. Lens unit
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
In order to thoroughly understand the present invention, detailed steps will be presented in the following description in order to explain the laser light source device proposed by the present invention. It is apparent that the practice of the invention is not limited to the specific details known to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
To the light that is blockked by the dichroic lens not by make full use of for the problem that light efficiency of light engine is low and in order to produce one or more bunch and have tricolor light, current laser projection device has used complicated light source structure to lead to the great problem of laser projection display device's volume, the utility model provides a new laser light source device, as shown in fig. 1 and 2, include:
a laser light source 1 configured to generate excitation light;
a wavelength conversion device 4 comprising a wavelength conversion partition configured to wavelength convert the excitation light to produce stimulated light and a reflective partition configured to reflect the excitation light to form reflected excitation light;
a dichroic element 2 disposed between the laser light source 1 and the wavelength conversion device 4, the dichroic element 2 including a first region 21 and a second region 22, the first region 21 configured to transmit the excitation light and reflect the stimulated light, the second region 22 configured to reflect the stimulated light and the reflected excitation light;
an optical path guiding unit 3 disposed between the dichroic element 2 and the wavelength conversion device 4, configured to guide a direction of the excitation light and the reflected excitation light.
The laser light source device of the present invention will be described in detail with reference to fig. 1 to 4.
Referring to fig. 1, a laser light source 1 of the present invention is configured to generate excitation light. Illustratively, the laser light source may be a narrow-band light source, and may also be a light source including a plurality of narrow bands.
As an example, the laser source is a narrow-band light source emitted from a specific laser source device, and a 445nm/30W laser source from Nissan corporation is currently used in many cases, but other laser sources may be used. The excitation light may be blue laser, violet laser, ultraviolet laser, or the like, but is not limited thereto, and the excitation light may be any color, and as an example, the excitation light is blue laser.
Referring to fig. 1, the laser light source device of the present invention further includes a dichroic element 2, wherein the dichroic element 2 is disposed between the laser light source 1 and the wavelength conversion device 4.
For example, the dichroic element 2 is a beam splitter coated with a selective transmission film, or a polarization beam splitter, or other optical elements capable of achieving the above purpose, which will not be described herein again. As an example, the dichroic element 2 coated with a permselective membrane is at an angle of 45 ° to the excitation light, for example, the dichroic element is disposed at an angle of 45 ° to the horizontal.
Referring to fig. 2, the dichroic element 2 includes a first region 21 and a second region 22, the first region 21 being configured to transmit the excitation light and reflect the stimulated light, and the second region 22 being configured to reflect the reflected excitation light and the stimulated light.
Further, the first region 21 is configured to transmit light having a shorter wavelength and reflect light having a longer wavelength, and the second region 22 is configured to reflect the light having the shorter wavelength and the light having the longer wavelength.
Illustratively, the first region 21 is located at a central portion of the dichroic element 2, and the second region 22 is located at an edge portion of the dichroic element 2.
Further, a lens group may be disposed between the laser light source 1 and the dichroic element 2 so that excitation light is incident on the first region 21 of the dichroic element 2.
Further, an optical path guiding unit 3 is provided between the wavelength conversion device 4 and the dichroic element 2 to make the reflected excitation light incident on the second region 22 of the dichroic element 2.
In one embodiment, the laser light source 1 generates excitation light with a shorter wavelength (e.g., blue light) which is incident on the first region 21 in the central portion of the dichroic element 2, and since the first region 21 is configured to transmit light with a shorter wavelength and reflect light with a longer wavelength, the first region 21 transmits the excitation light with a shorter wavelength and reflects the excited light with a longer wavelength (e.g., red light, green light); the reflected excitation light is incident on the second region 22 at the edge portion of the dichroic element 2 by the optical path guiding unit 3, and the second region 22 is configured to reflect both the shorter wavelength light and the longer wavelength light, and therefore, the second region reflects the shorter wavelength reflected excitation light and the longer wavelength stimulated light.
The utility model discloses a laser light source device still includes wavelength conversion device 4, as shown in FIG. 3, wavelength conversion device 4 includes wavelength conversion subregion and reflection subregion, wavelength conversion subregion configuration is right the exciting light carries out wavelength conversion in order to produce and receives laser, reflection subregion configuration is right the exciting light reflects in order to form through the reflected exciting light.
Illustratively, the wavelength conversion device 4 includes a rotary base body and a driving element for driving the base body to rotate, and the base body is of a barrel-type rotating wheel structure or a disc-type rotating wheel structure.
Illustratively, the base is provided as a rotatable wheel structure, as shown in fig. 1 and 3, and the wheel device includes a bucket wheel structure. Further, in addition to the barrel type wheel structure, the disk type wheel structure may be applied to the present application, and other shapes capable of realizing the above-described wavelength conversion function may be applied to the present application, without being limited to this example.
Further, the wavelength conversion device 4 further includes a driving element for driving the substrate to rotate according to a predetermined period. Optionally, the driving device includes a motor, wherein the base is disposed in close contact with the motor, and the motor drives the base to rotate. For example, the base is a drum wheel, and the center portion is fixed to a rotation shaft of a motor and is rotatable. As an implementation mode, a shaft hole is arranged at the center of the base body, a fixing ring is arranged at the shaft hole, a rotating motor penetrates through the shaft hole through a rotating shaft and is fastened with the fixing ring, so that the rotating motor can drive the base body through the rotating shaft, and corresponding treatment is carried out when exciting light strikes different partitions of the base body. Optionally, the driving element drives the substrate to rotate at a constant speed or at a non-constant speed, so that the output time sequence of the laser can be controlled more flexibly.
Illustratively, the wavelength conversion device 4 includes a number of sub-regions including a reflective sub-region that reflects the excitation light to form reflected excitation light and one or more wavelength conversion sub-regions that wavelength convert the excitation light incident on the wavelength conversion device 4 to produce stimulated light.
Further, the wavelength of the excitation light is different from that of the stimulated light, that is, the excitation light and the stimulated light are different colors of light. For example, the wavelength converting partition surface is provided with a wavelength converting material including, but not limited to, a red light converting material, a green light converting material, a blue light converting material, and a yellow light converting material.
In one embodiment, as shown in fig. 3, the wavelength conversion device 4 comprises a first partition, a second partition, and a third partition, wherein the first partition is a reflective partition, the second partition and the third partition are wavelength conversion partitions, the surface of the second partition is a red light conversion material, and the surface of the third partition is a green light conversion material. When the excitation light of blue color is incident on the surface of the first subarea, the reflected excitation light of blue color is generated by reflection; when the blue excitation light enters the surface of the second subarea, the wavelength is converted to generate red excited light; when the excitation light of blue color is incident on the surface of the third division, the wavelength conversion generates the excited light of green color.
In one embodiment, the exciting light is incident on the surface of the wavelength conversion material to generate the stimulated light, the emitting direction of the stimulated light is any direction, namely, the range of the included angle theta between the emitting direction of the stimulated light and the incident direction of the exciting light is 90 degrees < theta ≦ 180 degrees, so the stimulated light can be incident on the first area 21 and the second area 22 of the dichroic element 2 and can be reflected on the first area 21 and the second area 22. In addition, in order to improve efficiency and reduce optical loss, the substrate of the wavelength conversion device 4 is a metal substrate made of copper, aluminum, or the like, and the surface of the substrate on the excitation light irradiation device side is mirror-finished by silver deposition or the like so that the received laser light is reflected out of the wavelength conversion device 4, that is, the angle θ between the emission direction of the received laser light and the incidence direction of the excitation light is close to 180 °. Further, the optical path guiding unit 3 may condense the excited light so that the excited light is incident on the dichroic element 2.
Since the reflected excitation light is short-wave laser light having the same wavelength as the excitation light, and the reflected excitation light is incident on the first region 21 of the dichroic element 2, the reflected excitation light passes through the first region 21, which causes a lack of blue light of the excitation light or a small amount of blue light in the emission light, and reduces light efficiency, the reflective subarea should be prevented from reflecting the excitation light to cause the reflected excitation light to be incident on the first region 21 of the dichroic element 2, and the light path should be adjusted to cause the reflected excitation light to be incident on the second region 22 of the dichroic element 2.
Referring to fig. 4, the surface of the reflecting partition is a triangular step reflecting layer to separate the excitation light from the reflected excitation light. Further, the range of the angle θ' between the emission direction of the excitation light and the incidence direction of the excitation light is preferably 120 ° to 150 °.
The laser light source device of the present invention further includes a light path guide unit 3 configured to guide the excitation light and the direction of the reflected excitation light.
Illustratively, the optical path directing unit 3 converges the excitation light to the wavelength conversion partition surface of the wavelength conversion device 4. The optical path directing unit 3 collimates the divergent reflected excitation light so that the reflected excitation light is incident on the second region 22 of the dichroic element 2.
Illustratively, the optical path guiding unit 3 includes a Total Internal Reflection (TIR) lens. Specifically, the central region of the TIR lens is a convex lens, the edge region of the TIR lens is in a bowl shape, one end with a wider opening is close to the dichroic element 2, and the other end is close to the wavelength conversion device 4, the convex lens configuration of the central region converges the excitation light, and the bowl-shaped edge region provides total internal reflection to collimate the diverging reflected excitation light.
Further, the TIR lens is made of a transparent material, including but not limited to glass, Polycarbonate (PC) or Polymethylmethacrylate (PMMA).
In one embodiment, the excitation light emitted from the laser light source 1 is transmitted through the first region 21 of the dichroic element 2 and is incident on the central region of the TIR lens, and since the central region of the TIR lens is a convex lens, the excitation light can be converged on the surface of the wavelength conversion partition of the wavelength conversion device 4; as the wavelength conversion device rotates, when excitation light is incident on the surface of the reflective sub-section, the triangular step reflective layer separates the excitation light from the reflected excitation light, and the divergent reflected excitation light impinges on the TIR lens bowl shaped edge region, collimates the reflected excitation light, and then impinges on the second region 22 of the dichroic element 2.
The laser light source device of the present invention further includes a lens unit 5 to converge the reflected light from the dichroic element 2 with the emitted light to form the emergent light.
Illustratively, the lens unit 5 includes a convex lens or a lens group capable of achieving a light converging effect.
In one embodiment, the reflected excitation light (blue light) and the stimulated light (green light and red light) will be reflected by the dichroic unit 2 and then converged by the lens unit 5 to form a beam of light having three colors of red, green and blue as the outgoing light.
According to the utility model provides a laser light source device sets up wavelength conversion subregion and reflection subregion in order to right on wavelength conversion device exciting light carries out wavelength conversion and reflection, utilizes light path guide unit to guide the direction of exciting light through the reflection, and then closes the bundle with exciting light through the reflected exciting light and jets out, has improved laser light source device's efficiency, has reduced laser light source device's volume.
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A laser light source device, comprising:
a laser light source configured to generate excitation light;
a wavelength conversion device comprising a wavelength conversion partition configured to wavelength convert the excitation light to produce stimulated light and a reflective partition configured to reflect the excitation light to form reflected excitation light;
a dichroic element disposed between the laser light source and the wavelength conversion device, the dichroic element including a first region configured to transmit the excitation light and reflect the stimulated light, and a second region configured to reflect the stimulated light and the reflected excitation light;
an optical path guiding unit disposed between the dichroic element and the wavelength conversion device, configured to guide a direction of the excitation light and the reflected excitation light.
2. The laser light source device according to claim 1, wherein the first region is configured to transmit light having a shorter wavelength and reflect light having a longer wavelength, and the second region is configured to reflect the light having the shorter wavelength and the light having the longer wavelength.
3. The laser light source device according to claim 1, wherein the first region is located at a central portion of the dichroic element, and the second region is located at an edge portion of the dichroic element.
4. The laser light source device according to claim 1, wherein the surface of the reflection section is a triangular step reflection layer to separate the excitation light from the reflected excitation light.
5. The laser light source device according to claim 4, wherein an angle between an incident direction of the excitation light and an exit direction of the excitation light is 120 ° to 150 °.
6. The laser light source device according to claim 2, wherein the optical path guiding unit is configured to cause the reflected excitation light to be incident on the second region of the dichroic element.
7. The laser light source device according to claim 6, wherein the optical path guiding unit includes a total internal reflection lens, a central region of the total internal reflection lens is a convex lens, an edge region of the total internal reflection lens is in a bowl shape, and one end of the total internal reflection lens, which is wider in opening, is close to the dichroic element, and the other end of the total internal reflection lens is close to the wavelength conversion device.
8. The laser light source device according to claim 1, further comprising:
a lens unit configured to condense the reflected excitation light and the stimulated light.
9. The laser light source device according to claim 1, wherein the wavelength conversion device comprises a rotary substrate and a driving element for driving the substrate to rotate, and the substrate is of a barrel-type rotating wheel structure or a disk-type rotating wheel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921243550.0U CN210376994U (en) | 2019-08-02 | 2019-08-02 | Laser light source device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921243550.0U CN210376994U (en) | 2019-08-02 | 2019-08-02 | Laser light source device |
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| CN210376994U true CN210376994U (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113238442A (en) * | 2021-04-21 | 2021-08-10 | 无锡视美乐激光显示科技有限公司 | Light source device and projection system |
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2019
- 2019-08-02 CN CN201921243550.0U patent/CN210376994U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113238442A (en) * | 2021-04-21 | 2021-08-10 | 无锡视美乐激光显示科技有限公司 | Light source device and projection system |
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