CN212112111U - Light source device and optical apparatus - Google Patents
Light source device and optical apparatus Download PDFInfo
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- CN212112111U CN212112111U CN202021244358.6U CN202021244358U CN212112111U CN 212112111 U CN212112111 U CN 212112111U CN 202021244358 U CN202021244358 U CN 202021244358U CN 212112111 U CN212112111 U CN 212112111U
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Abstract
The utility model provides a light source device and optical equipment relates to the technical field of optics. The light source device comprises a light source component, an exciting light optical path component, an excited light optical path component and a wavelength conversion component; the exciting light optical path component comprises a non-rotational symmetric dimming device; the distribution state of the exciting light emitted by the light source component is changed through the non-rotational symmetric dimming device, the exciting light with the changed distribution state reaches the wavelength conversion component to form an exciting light spot, and the exciting light spot excites the wavelength conversion component to generate excited light; the stimulated luminescence passes through the stimulated luminescence light path component to form output light, and the technical problem of light source brightness loss in the prior art is solved.
Description
Technical Field
The utility model belongs to the technical field of the optics technique and specifically relates to a light source device and optical equipment are related to.
Background
With the development of optical projection technology, laser projection technology has been more and more widely used. Most of laser projectors adopt blue laser, and then the blue laser is used for exciting fluorescent powder of other colors to obtain excited light of other colors so as to obtain a color light source.
The laser fluorescent light source is a light source device which adopts blue laser to excite fluorescent powder to generate fluorescence, excitation light emitted from the light source device is firstly shaped into collimated or approximately collimated light through a light shaping element, then the collimated or approximately collimated light is incident on a wavelength conversion device through elements such as a beam splitter and the like to generate excited light with various wavelengths (different colors) and reflect the excited light, and the excited light is incident on an optical-mechanical system through elements such as a light shaping element, a beam splitter and the like, so that a light source is provided for the optical-mechanical system.
Generally, the light spot converged on the phosphor powder is a circle or an approximate circle, and the excited light emitted by the phosphor powder is incident to the light inlet of the optical-mechanical system after passing through the light shaping element, the light splitting sheet and other elements. According to the imaging principle, the incident light spot converged at the light inlet of the optical-mechanical system is also circular or approximately circular. In practical situations, as shown in fig. 1, the light inlet 1 of the optical-mechanical system is usually a rectangular hole, but the incident light spot 2 is circular or approximately circular, so the shape and size of the incident light spot 2 and the light inlet 1 are not matched, and a part of light will irradiate the outside of the light inlet 1, resulting in a technical problem of loss of brightness of a part of the light source.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a light source device and optical equipment to alleviate prior art and have the technical problem of light source luminance loss.
In a first aspect, an embodiment of the present invention provides a light source device, including a light source assembly, an excitation light path assembly, an excited light path assembly, and a wavelength conversion assembly;
the exciting light optical path component comprises a non-rotational symmetric dimming device;
the distribution state of the exciting light emitted by the light source component is changed through the non-rotational symmetric dimming device, the exciting light with the changed distribution state reaches the wavelength conversion component to form an exciting light spot, and the exciting light spot excites the wavelength conversion component to generate excited light;
the stimulated luminescence passes through the stimulated luminescence light path component to form output light.
In a possible embodiment, the distribution state comprises a spatial angular distribution state of the excitation light emitted by the light source module.
In a possible embodiment, the distribution state includes an angular distribution state of the excitation light in two directions perpendicular to each other, wherein an angular distribution range in one direction is larger than an angular distribution range in the other direction.
In one possible embodiment, the rotationally asymmetric dimming device is rotationally adjustable around the optical axis.
In a possible embodiment, the excitation spots are non-circularly distributed.
In one possible embodiment, the excitation light path assembly further includes a first light shaping element, a second light shaping element, and a light splitting sheet;
the exciting light emitted by the light source component is converted into exciting light with a changed distribution state through the first light shaping element and the non-rotational symmetric dimming device in sequence, and then reaches the wavelength conversion component through the light splitting piece and the second light shaping element in sequence to generate excited light.
In one possible embodiment, the excited light path component includes the second light shaping element, the beam splitter, and a third light shaping element;
the stimulated light sequentially passes through the second light shaping element, the light splitting sheet and the third light shaping element to form output light.
In a possible embodiment, the first light shaping element comprises a condenser lens and an astigmatic lens, and the distance between the condenser lens and the astigmatic lens is adjustable.
In a possible embodiment, the condenser lens and the astigmatic lens are both cylindrical lenses, and the power meridian directions of the condenser lens and the astigmatic lens are the same.
In a possible embodiment, the non-rotationally symmetric light modulation device comprises a cylindrical mirror, a prism, an anisotropic diffuser or a lens array.
In a second aspect, an embodiment of the present invention further provides an optical apparatus, including an optical mechanical system and the light source device;
the output light emitted by the light source device is incident to the light inlet of the optical-mechanical system.
In one possible embodiment, the light inlet of the opto-mechanical system is rectangular;
the output light emitted by the light source device forms an elliptical light spot at the light inlet, the long axis of the light spot is consistent with the long side direction of the light inlet, and the short axis of the light spot is consistent with the short side direction of the light inlet.
The embodiment of the utility model provides a light source device, include light source subassembly, exciting light path subassembly, receive exciting light path subassembly and wavelength conversion subassembly. The exciting light path component comprises a non-rotational-symmetry light dimming device, exciting light emitted by the light source component is converted into exciting light with a changed distribution state after passing through the non-rotational-symmetry light dimming device, the exciting light reaches the wavelength conversion component to form an exciting light spot, the exciting light spot excites the wavelength conversion component to generate stimulated light, and then the stimulated light forms output light after passing through the stimulated light path component. That is to say, the embodiment of the utility model provides an among the light source device, utilize non-rotational symmetry to adjust luminance the device and changed the distribution state of exciting light, then produced excited light and output light also change the distribution state to realized the adjustment to the shape of outputting light, made the shape of the facula that output light formed and the shape of the light entry of optical equipment (for example ray apparatus system) afterwards more match, avoided the loss of light source, thereby alleviated prior art and had the technical problem of light source luminance loss.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described 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 diagram of a conventional light source output;
fig. 2 is a schematic view of a light source device according to an embodiment of the present invention;
fig. 3a and 3b are schematic diagrams of a cylindrical mirror in embodiment 1 of the present invention;
fig. 4 is a schematic view of a light source device provided in embodiment 1 of the present invention;
fig. 5 is a schematic diagram of the light source output in embodiment 1 of the present invention;
fig. 6 is a schematic view of a light source device provided in embodiment 2 of the present invention;
fig. 7 is a schematic diagram of the light source output in embodiment 2 of the present invention;
fig. 8 is a schematic view of a light source device provided in embodiment 3 of the present invention;
FIGS. 9a and 9b are schematic views of an anisotropic diffusion sheet according to embodiment 3 of the present invention;
fig. 10 is a schematic diagram of the light source output in embodiment 3 of the present invention;
fig. 11 is a schematic view of a light source device provided in embodiment 4 of the present invention;
fig. 12 is a schematic view of a lens array in embodiment 4 of the present invention;
fig. 13 is a schematic diagram of the light source output in embodiment 4 of the present invention;
fig. 14 is a schematic view of a light source device provided in embodiment 5 of the present invention;
fig. 15 is a schematic view of a telescopic system in embodiment 5 of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
With the development of optical projection technology, laser projection technology has been more and more widely used. Most of laser projectors adopt blue laser, and then the blue laser is used for exciting fluorescent powder of other colors to obtain excited light of other colors so as to obtain a color light source.
The laser fluorescent light source is a light source device which adopts blue laser to excite fluorescent powder to generate fluorescence, excitation light emitted from the light source device is firstly shaped into collimated or approximately collimated light through a light shaping element, then the collimated or approximately collimated light is incident on a wavelength conversion device through elements such as a beam splitter and the like to generate excited light with various wavelengths (different colors) and reflect the excited light, and the excited light is incident on an optical-mechanical system through elements such as a light shaping element, a beam splitter and the like, so that a light source is provided for the optical-mechanical system.
Generally, the light spot converged on the phosphor powder is a circle or an approximate circle, and the excited light emitted by the phosphor powder is incident to the light inlet of the optical-mechanical system after passing through the light shaping element, the light splitting sheet and other elements. According to the imaging principle, the incident light spot converged at the light inlet of the optical-mechanical system is also circular or approximately circular. In practical terms, as shown in fig. 1, the light inlet 100 of the optical-mechanical system is generally a rectangular hole, but the incident light spot 200 is circular or approximately circular, so that the shape and size of the incident light spot 200 and the light inlet 100 are not matched, and a part of light will irradiate the outside of the light inlet 100, which causes a technical problem of loss of part of the light source.
To solve the above problem, an embodiment of the utility model provides a light source device, include light source subassembly, excitation light path subassembly, receive excitation light path subassembly and wavelength conversion subassembly. The exciting light path component comprises a non-rotational-symmetry light dimming device, exciting light emitted by the light source component changes the distribution state through the non-rotational-symmetry light dimming device, the exciting light with the changed distribution state reaches the wavelength conversion component to form an exciting light spot, the exciting light spot excites the wavelength conversion component to generate stimulated light, and the stimulated light forms output light through the stimulated light path component. As a preferred solution, the excitation spots are distributed non-circularly, for example in the shape of an ellipse or the like.
It should be noted that rotational symmetry means non-directivity, i.e., rotation by any angle is also called a rotation body. In this regard, the non-rotationally symmetric light control device in the present embodiment means a light control device that changes according to the rotation angle, for example, an axisymmetric or mirror-symmetric form.
The distribution state may include a spatial angle distribution state of the excitation light emitted by the light source module; alternatively, the distribution state includes an angular distribution state of the excitation light in two directions perpendicular to each other, in which an angular distribution range in one direction is larger than that in the other direction.
In one possible embodiment, the rotationally asymmetric dimming device is rotationally adjustable around the optical axis, as shown in fig. 2. The exciting light path assembly comprises a first light shaping element 11, a second light shaping element 13 and a beam splitter 12 except for the rotation symmetry light adjusting device 20, and the excited light path assembly comprises the second light shaping element 13, the beam splitter 12 and a third light shaping element 15.
The excitation light emitted from the light source assembly 10 is sequentially converted into excitation light with a changed distribution state by the first light shaping element 11 and the non-rotational symmetric light modulation device 20, and then sequentially passes through the beam splitter 12 and the second light shaping element 13 to reach the wavelength conversion assembly 14 in the form of an excitation light spot a, so as to generate excited light. The excited light sequentially passes through the second light shaping element 13, the beam splitter 12 and the third light shaping element 15 to form output light.
The embodiment of the utility model provides an among the light source device, utilize non-rotational symmetry to adjust luminance the device and changed the distribution state of exciting light, then produced excited light and output light also change the distribution state, thereby realized the adjustment to the shape of outputting light, make the shape of the excited light spot B that outputs light formed more match with the shape of the light entry of optical equipment (for example ray apparatus system) thereafter, avoided the loss of light source, thereby alleviated prior art and had the technical problem of light source luminance loss.
In one possible embodiment, the spectroscopic sheet 12 is capable of reflecting the excitation light and is capable of transmitting the stimulated excitation light. For example, the light splitting sheet 12 may be a dichroic sheet, which is capable of transmitting light of a certain wavelength completely and reflecting light of another wavelength completely. For example, the spectroscopic sheet 12 in the present embodiment can reflect excitation light having a shorter wavelength and can transmit stimulated light having a longer wavelength.
In one possible embodiment, the wavelength conversion assembly 14 includes a fluorescent wheel, and a rotating shaft, a driver, and the like (not shown in the figures) for rotating the fluorescent wheel. On the wheel disc of the fluorescent wheel, a plurality of areas are divided in the circumferential direction on the same concentric ring, and fluorescent powder with different colors is respectively arranged in the areas, so that excited light with different colors is emitted after being irradiated by the excited light.
In one possible embodiment, the light source module 10 is an array light source, i.e., the light source module 10 is an array light source and not a single light source. That is, the light source assembly 10 is composed of a plurality of identical single light sources in an array. In addition, the light source assembly 10 may be a combination of a plurality of array light sources.
The embodiment of the utility model provides an among the light source device, non-rotational symmetry adjusts luminance the device and includes the component of multiple forms such as cylindrical mirror, prism, anisotropic diffusion piece or lens array, describes several kinds of typical application embodiments below:
example 1
The non-rotational symmetry dimming device can adopt a cylindrical mirror, can be a negative cylindrical mirror and can also be a positive cylindrical mirror. As shown in fig. 3a, for example, for a positive cylindrical mirror, the axial meridian (vertical direction in the figure) of the light passing through the cylindrical mirror 201 does not change the vergence; as shown in fig. 3b, the vergence of the light rays passing through the power meridian (horizontal direction in the figure) of the cylindrical mirror 201 changes.
As shown in fig. 4, in the cylindrical mirror 201, in the light source device, the meridional direction of refractive power corresponds to the longitudinal direction of the light inlet of the optical-mechanical system. In practical use, the cylindrical mirror 201 can be set to be a rotatable adjusting structure, so that the shape of the excited light spot B can be matched to the maximum extent. In practical applications, the first light shaping element 11 needs to shape the excitation light emitted by the light source assembly 10 into collimated or approximately collimated light, so as to achieve the purpose of changing the light spot by the cylindrical mirror 201.
Fig. 5 is a schematic diagram showing that the meridian direction of refractive power of the cylindrical mirror 201 corresponds to the long-side direction of the aperture of the light inlet of the optical mechanical system, and it can be seen from the diagram that the stimulated light spots B are distributed in an elliptical shape, and compared with circular light spots, the aperture can be matched more, and the light utilization efficiency is higher.
Example 2
As shown in fig. 6, the non-rotationally symmetric light control device may also employ a prism 202, wherein the vertex of the prism 202 is at or near the optical axis and parallel to the optical axis. The principle is that the light refraction directions of the upper and lower sides (the directions of the inclined surfaces of the prism 202) are not the same, and the front and rear sides (the directions in which the triangular surfaces of the prism 202 extend) do not change. In practical applications, the first light-shaping element 11 is also required to shape the light emitted from the light source module 10 into collimated or approximately collimated light, so as to achieve the purpose of changing the light spot by the prism 202.
As shown in fig. 7, the direction of the inclined plane of the prism 202 is required to correspond to the long side direction of the aperture of the light inlet of the optical-mechanical system during use, and as can be seen from the figure, the excited light spots B are distributed in an elliptical shape, and can be more matched with the aperture than circular light spots, so that the light utilization efficiency is higher. In practice, the prism 202 may be arranged as a rotatable adjusting structure, so that the matching of the spot shape can be realized to the maximum extent.
Example 3
As shown in fig. 8, the non-rotationally symmetric light control device may employ an anisotropic diffusion sheet 203, and the diffusion sheet 203 may have a flat plate shape and the diffusion angles in both directions of the anisotropic diffusion sheet 203 may be different.
As shown in fig. 9a, the scattering angle of light is relatively large in the X direction, so the X direction is a large-angle diffusion direction; as shown in fig. 9b, in the Y direction perpendicular to the X direction, the scattering angle of light is relatively small, and thus the Y direction is a small angle diffusion direction.
As shown in fig. 10, in practical use, the wide-angle diffusion direction (X direction in fig. 9 a) of the diffusion sheet 203 is required to correspond to the long side direction of the aperture of the light inlet of the optical mechanical system, and as can be seen from the figure, the stimulated light spots B are distributed in an elliptical shape, and can match the aperture more than circular light spots, and the light utilization efficiency is higher. In practical use, the diffusion plate 203 can be set to be a rotatable adjusting structure, and the matching of the spot shape can be realized to the maximum extent.
Example 4
As shown in fig. 11, a non-rotationally symmetric dimming device may also employ a lens array 204. As shown in FIG. 12, lens array 204 is comprised of a number of lenslets, each of which is rectangular in shape.
As shown in fig. 13, the long side direction of the lenslets in the lens array 204 corresponds to the long side direction of the aperture of the light inlet of the optical mechanical system, and it can be seen that the excited light spots B are distributed in an elliptical shape, and compared with circular light spots, the apertures can be matched more, and the light utilization efficiency is higher. In practice, the lens array 204 may be arranged in a rotatable adjusting structure, so that the matching of the spot shape can be realized to the maximum extent.
Example 5
In one possible embodiment, the first light shaping element comprises a condenser lens and an astigmatism lens, and the distance between the condenser lens and the astigmatism lens is adjustable.
In a possible embodiment, the condenser lens and the astigmatic lens are cylindrical lenses, and further, the power meridian directions of the condenser lens and the astigmatic lens are the same. As shown in fig. 14, the first light-shaping element 11 may be provided in the form of a telescopic system, which includes a convex lens 111 and a concave lens 112.
As shown in fig. 15, the adjustment of the shape and size of the spot a can be achieved by changing the distance between the convex lens 111 and the concave lens 112. The first light shaping element 11 is adjusted by changing the angle of the excitation light incident on the non-rotationally symmetric light modulation device 20, that is, the first light shaping element 11 is used to change the emitting direction of the excitation light, and this direction is generally realized by adjusting the position of a certain lens of the first light shaping element 11.
Of course, the two elements in the first light shaping element 11 are not limited to the convex lens and the concave lens, and may also be a telescopic system formed by a group of cylindrical mirrors, that is, a positive cylindrical mirror and a negative cylindrical mirror, and the refractive power directions of the two cylindrical mirrors are the same.
Compared with the prior art, the embodiment of the utility model provides a through adopting non-rotational symmetry to adjust luminance device 20, has reached the purpose that changes the excitation light spot shape, deuterogamies the change of two lens positions in the first light plastic component 11, and non-rotational symmetry adjusts luminance device 20's rotation regulation and mutually supports, has realized arousing the regulation of the shape and the size of facula.
In a second aspect, the embodiment of the present invention further provides an optical device, which includes an optical mechanical system and the light source device provided in any of the above embodiments, wherein the output light emitted by the light source device enters the light inlet of the optical mechanical system.
In a possible embodiment, the light inlet of the opto-mechanical system is rectangular, the output light from the light source device forms an elliptical light spot at the light inlet, the major axis of the light spot is aligned with the long side direction of the light inlet, and the minor axis of the light spot is aligned with the short side direction of the light inlet.
The embodiment of the utility model provides an optical equipment has the same technical characteristic with the light source device that above-mentioned embodiment provided, so also can solve the same technical problem, reaches the same technological effect.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may for example be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the system described above may refer to the corresponding process in the foregoing embodiment of the apparatus, and is not described herein again.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (12)
1. A light source device is characterized by comprising a light source component, an exciting light optical path component, an excited light optical path component and a wavelength conversion component;
the exciting light optical path component comprises a non-rotational symmetric dimming device;
the distribution state of the exciting light emitted by the light source component is changed through the non-rotational symmetric dimming device, the exciting light with the changed distribution state reaches the wavelength conversion component to form an exciting light spot, and the exciting light spot excites the wavelength conversion component to generate excited light;
the stimulated luminescence passes through the stimulated luminescence light path component to form output light.
2. The light source device according to claim 1, wherein the distribution state includes a spatial angular distribution state of the excitation light emitted from the light source module.
3. The light source device according to claim 1, wherein the distribution state includes an angular distribution state of the excitation light in two directions perpendicular to each other, and an angular distribution range in one direction is larger than an angular distribution range in the other direction.
4. The light source device of claim 1, wherein the non-rotationally symmetric light modulating device is rotationally adjustable about an optical axis.
5. The light source device of claim 1, wherein the excitation light spots are non-circularly distributed.
6. The light source device according to claim 1, wherein the excitation light path assembly further includes a first light shaping element, a second light shaping element, and a beam splitter;
the exciting light emitted by the light source component is converted into exciting light with a changed distribution state through the first light shaping element and the non-rotational symmetric dimming device in sequence, and then reaches the wavelength conversion component through the light splitting piece and the second light shaping element in sequence to generate excited light.
7. The light source device according to claim 6, wherein the excited light path assembly includes the second light shaping element, the beam splitter, and a third light shaping element;
the stimulated light sequentially passes through the second light shaping element, the light splitting sheet and the third light shaping element to form output light.
8. The light source device of claim 6, wherein the first light shaping element comprises a condenser lens and a diffuser lens, and a distance between the condenser lens and the diffuser lens is adjustable.
9. The light source device according to claim 8, wherein the condenser lens and the astigmatic lens are both cylindrical lenses, and power meridian directions of the condenser lens and the astigmatic lens are the same.
10. The light source device of claim 1, wherein the non-rotationally symmetric light modulation device comprises a cylindrical mirror, a prism, an anisotropic diffuser, or a lens array.
11. An optical apparatus comprising an optical mechanical system and the light source device according to any one of claims 1 to 10;
the output light emitted by the light source device is incident to the light inlet of the optical-mechanical system.
12. The optical apparatus of claim 11, wherein the light entrance of the opto-mechanical system is rectangular;
the output light emitted by the light source device forms an elliptical light spot at the light inlet, the long axis of the light spot is consistent with the long side direction of the light inlet, and the short axis of the light spot is consistent with the short side direction of the light inlet.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113050354A (en) * | 2021-03-05 | 2021-06-29 | 青岛海信激光显示股份有限公司 | Light source assembly and projection equipment |
| US11768428B2 (en) | 2020-06-22 | 2023-09-26 | Hisense Laser Display Co., Ltd | Laser source and laser projection apparatus |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11768428B2 (en) | 2020-06-22 | 2023-09-26 | Hisense Laser Display Co., Ltd | Laser source and laser projection apparatus |
| CN113050354A (en) * | 2021-03-05 | 2021-06-29 | 青岛海信激光显示股份有限公司 | Light source assembly and projection equipment |
| CN113050354B (en) * | 2021-03-05 | 2023-09-15 | 青岛海信激光显示股份有限公司 | Light source assembly and projection device |
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