Light source system

Abstract

The invention provides a light source system which comprises a collimation piece, a first light source, a second light source, a first refraction piece, a second refraction piece and a reflection piece. The collimator has an optical axis. The first light source is arranged on a first side or a second side of the optical axis and is used for emitting a first light beam, wherein the first side and the second side are two opposite sides of the optical axis respectively. The second light source is arranged on the first side or the second side of the optical axis and emits a second light beam. The first refraction piece is arranged on one of the first side and the second side of the optical axis and used for reflecting the first light beam. The second refraction piece is arranged on the other one of the first side and the second side of the optical axis and is used for reflecting the second light beam. The reflecting part is used for reflecting the first light beam reflected by the first refraction part and the second light beam reflected by the second refraction part. The paraxial part of the first refraction piece and the second refraction piece is closer to the optical axis than the distal part of the first refraction piece and the second refraction piece, and the first refraction piece and the second refraction piece are different in inclination angle.

Description

Technical Field

[0001] The present invention relates to the field of light sources, and in particular to a light source system of a projector. Background Art

[0002] A light source system generally used in a projector is required to include multiple optical components with different functions in order to provide illumination light to a projection module. However, these optical components often result in the projector or light source system being too large.

[0003] In the prior art, to reduce the size of a light source system, a common approach is to have the light beams emitted by each laser light source pass through a common refraction element and then be incident on a collimator. The collimator then projects the light beams onto a reflective module to form multiple light spots. However, this approach results in poor overlap in the positions of the light spots emitted by each light source, and the geometric center of each light spot deviates significantly from the optical axis of the collimator, thereby causing aberration and decentration problems.

[0004] Therefore, it is necessary to design a new light source system to overcome the above defects. Summary of the Invention

[0005] The present invention aims to provide a light source system that can adjust the spot position of the light beam emitted by each light source, thereby improving aberration and eccentricity problems, and effectively reducing the volume of the light source system, making the light source system more suitable for small or micro projectors.

[0006] To achieve the above object, the present invention provides a light source system, comprising a collimating member having an optical axis;

[0007] A first light source is disposed on a first side or a second side of the optical axis and is configured to emit a first light beam, wherein the first side and the second side are opposite sides of the optical axis;

[0008] a second light source, disposed on the first side or the second side of the optical axis and configured to emit a second light beam;

[0009] a first light-reflecting element disposed on one of the first side and the second side of the optical axis and configured to reflect the first light beam;

[0010] a second light-reflecting element disposed on the other of the first side and the second side of the optical axis and configured to reflect the second light beam; and

[0011] a reflection module, configured to reflect the first light beam reflected from the first refraction element and the second light beam reflected from the second refraction element;

[0012] One of the first refraction element and the second refraction element is a proximal element, and the other is a distal element. The proximal element is closer to the optical axis than the distal element. The first refraction element and the second refraction element have different tilt angles.

[0013] Preferably, the distal inclination angle of the distal one is smaller than the proximal inclination angle of the proximal one.

[0014] Preferably, the light source system further includes:

[0015] A light pipe is disposed downstream of the reflection module and has a central axis;

[0016] The central axis overlaps with the optical axis.

[0017] Preferably, the light source system further includes:

[0018] a first light homogenizing element, disposed between the first light source and the first light-refracting element and configured to reflect the first light beam toward the first light-refracting element; and

[0019] The second light homogenizing element is disposed between the second light source and the second refracting element and is used for reflecting the second light beam to the second refracting element.

[0020] Preferably, the first light homogenizer and the second light homogenizer both include a light homogenizer unit; the curvature radius of the light homogenizer unit of the first light homogenizer or the second light homogenizer corresponding to the distal axis is smaller than the curvature radius of the light homogenizer unit of the second light homogenizer or the first light homogenizer corresponding to the proximal axis.

[0021] Preferably, it also includes:

[0022] a first reflector, disposed opposite to the first light source and configured to reflect the first light beam; and

[0023] The second reflector is disposed opposite to the second light source and is used for reflecting the second light beam.

[0024] Preferably, the first light source has a first light-emitting surface, and the second light source has a second light-emitting surface, and the first light-emitting surface and the second light-emitting surface face opposite directions respectively.

[0025] Preferably, the first light source is a light source that emits monochromatic light.

[0026] Preferably, the reflective module includes a reflective layer and a wavelength conversion layer, and the wavelength conversion layer is disposed on the reflective layer.

[0027] Preferably, the first refraction element and the second refraction element are bidirectional beam splitters;

[0028] The first light beam has a first wavelength, and the bidirectional beam splitter reflects the light of the first wavelength and allows light other than the first wavelength to pass through.

[0029] Preferably, it also includes:

[0030] light guides; and

[0031] A light concentrating element is disposed between the light pipe and the first light-reflecting element.

[0032] Preferably, it also includes:

[0033] Concentrator;

[0034] The first refracting element and the second refracting element are disposed between the collimating element and the focusing element.

[0035] Compared to existing technologies, the light source system provided by the present invention divides the optical path into off-axis and paraxial regions based on the optical axis of the collimator. One of the first and second refraction elements is paraxial, while the other is distal, and they have different tilt angles. This allows the position of the first light spot projected by the first beam on the reflective module and the position of the second light spot projected by the second beam on the reflective module to be adjusted, increasing the overlapping area between the first and second light spots, improving aberration and decentration issues, and thereby enhancing the color uniformity of the projected image. Furthermore, the light source system provided by the present invention has a compact structure, which can reduce the size of the light source system and is more suitable for small or micro projectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1A FIG. 1 is a schematic diagram illustrating a light source system according to an embodiment of the present invention.

[0037] Figure 1B Draw Figure 1A Schematic diagram of the reflection module 140.

[0038] Figure 1C FIG1A is a schematic diagram of the first light diffuser.

[0039] Figure 1D_1 FIG. 1 is a schematic diagram of a reflection module 140 ′ according to another embodiment of the present invention.

[0040] Figure 1D_2 Draw Figure 1D_1 A cross-sectional view of the reflection module 140' along the direction 1D_2-1D_2'.

[0041] Figure 1E_1 FIG. 1 is a schematic diagram illustrating a reflection module 140 ″ according to another embodiment of the present invention.

[0042] Figure 1E_2 Draw Figure 1E_1A cross-sectional view of the reflection module 140" along the direction 1E_2-1E_2'.

[0043] Figure 2 Draw Figure 1A Schematic diagram of the overlap of a first light spot projected by the first light beam on the reflector and a second light spot projected by the second light beam on the reflector.

[0044] Figure 3 A schematic diagram illustrating a first light spot projected by a first light beam and a second light spot projected by a second light beam of a light source system of a control group is shown.

[0045] Figure 4 FIG. 1 is a schematic diagram illustrating a light source system according to another embodiment of the present invention.

[0046] Figure 5 FIG. 1 is a schematic diagram illustrating a light source system according to another embodiment of the present invention.

[0047] Figure 6 FIG. 1 is a schematic diagram illustrating a light source system according to another embodiment of the present invention.

[0048] Figure 7 FIG. 1 is a schematic diagram illustrating a light source system according to another embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0050] Certain terms are used throughout the specification and claims to refer to specific components. Those skilled in the art will understand that manufacturers may use different terms to refer to the same component. This specification and claims do not distinguish components by name, but rather by their functional differences. Throughout the specification and claims, the term "including" is open-ended and should be interpreted as meaning "including, but not limited to."

[0051] Please refer to Figures 1A to 1E_2, 2 and 3. Figure 1A is a schematic diagram of a light source system 100A according to an embodiment of the present invention. Figure 1B Draw Figure 1A A schematic diagram of the reflection module 140 is shown. Figure 1C Draw Figure 1A FIG is a schematic diagram of the first light homogenizer 150A, Figure 1D_1 FIG. 1 is a schematic diagram of a reflection module 140 ′ according to another embodiment of the present invention. Figure 1D_2 Draw Figure 1D_1 A cross-sectional view of the reflection module 140' along the direction 1D_2-1D_2', Figure 1E_1A schematic diagram of a reflection module 140" according to another embodiment of the present invention is shown. Figure 1E_2 Draw Figure 1E_1 A cross-sectional view of the reflection module 140" along the direction 1E_2-1E_2', Figure 2 Draw Figure 1A FIG. 1 is a schematic diagram showing an overlap of a first light spot SP11 of the first light beam L1 projected on the reflection module 140 and a second light spot SP12 of the second light beam L2 projected on the reflection module 140. Figure 3 A schematic diagram showing the overlap of a first light spot SP11' projected by the first light beam and a second light spot SP12' projected by the second light beam of the light source system of the control group is shown. The Z axis in the figure is, for example, parallel to the optical axis AX1 and perpendicular to the XY plane.

[0052] like Figure 1A As shown, the light source system 100A includes a first light source 110A, a second light source 110B, a collimating element 120A, a focusing element 120B, a first refractive element 130A, a second refractive element 130B, a reflective module 140, a first light homogenizing element 150A, a second light homogenizing element 150B, a first reflective element 160A, a second reflective element 160B and a light pipe 170.

[0053] like Figure 1A and Figure 2 As shown, a collimator 120A has an optical axis AX1. A first light source 110A is disposed on a first side S1 or a second side S2 of the optical axis AX1 and is configured to emit a first light beam L1, wherein the first side S1 and the second side S2 are located on opposite sides of the optical axis AX1. A second light source 110B is disposed on the first side S1 or the second side of the optical axis AX1 and is configured to emit a second light beam L2. A first deflector 130A is disposed on one of the first side S1 and the second side S2 of the optical axis AX1 and is configured to reflect the first light beam L1. A second deflector 130B is disposed on the other of the first side S1 and the second side S2 of the optical axis AX1 and is configured to reflect the second light beam L2. A reflection module 140 is configured to reflect the first light beam L1 reflected from the first deflector 130A and the second light beam L2 reflected from the second deflector 130B. The proximal portions of the first and second deflecting elements 130A and 130B are closer to the optical axis AX1 than the distal portions of the first and second deflecting elements 130A and 130B. In this embodiment, the first and second deflecting elements 130A and 130B are tilted at different angles. This allows for adjustment of the position of the first light spot SP11 projected by the first light beam L1 on the reflective module 140 and the position of the second light spot SP12 projected by the second light beam L2 on the reflective module 140. This increases the overlapping area between the first and second light spots SP11 and SP12, thereby improving aberration and decentration issues.

[0054] In detail, Figure 3As shown, the first light spot SP11' projected by the first light beam of the light source system of the control group has poor overlap with the second light spot SP12' projected by the second light beam, that is, the deviation between the geometric center C1' of the first light spot SP11' and the geometric center C2' of the second light spot SP12' is large, and the deviation between the geometric center C1' of the first light spot SP11' and the optical axis AX1 is large. Compared with the control group, Figure 2 As shown, the geometric center C1 of the area of ​​the first light spot SP11 projected by the first light beam L1 of the embodiment of the present invention and the geometric center C2 of the area of ​​the second light spot SP12 projected by the second light beam L2 on the reflection module 140 overlap or are close to the optical axis AX1 as much as possible, thereby reducing aberration and eccentricity.

[0055] Due to the optical design of the light source system 100A, a conventional afocal system can be omitted, thereby reducing the size of the light source system 100A, making the light source system 100A more suitable for small or micro projectors.

[0056] like Figure 1A As shown, a first light beam L1 emitted from a first light source 110A sequentially passes through the first reflector 160A, the first light homogenizer 150A, the first light refraction element 130A, and the collimator 120A to the reflective module 140. After being reflected from the reflective module 140, the first light beam L1 sequentially passes through the collimator 120A and the light concentrator 120B to the light pipe 170. Furthermore, a second light beam L2 emitted from a second light source 110B sequentially passes through the second reflector 160B, the second light homogenizer 150B, the second light refraction element 130B, and the collimator 120A to the reflective module 140. After being reflected from the reflective module 140, the first light beam L2 sequentially passes through the collimator 120A and the light concentrator 120B to the light pipe 170.

[0057] like Figure 1A As shown, the first light source 110A has a first light-emitting surface 110As, and the second light source 110B has a second light-emitting surface 110Bs. The first light-emitting surface 110As and the second light-emitting surface 110Bs face opposite directions. The first light beam L1 emitted by the first light source 110A has a first wavelength, and the second light beam L2 emitted by the second light source 110B also has the first wavelength. In this embodiment, the first light source 110A and the second light source 110B are, for example, light sources that can emit monochromatic light. For example, the first light source 110A and the second light source 110B are blue laser light sources, and the first light beam L1 and the second light beam L2 are blue lasers.

[0058] like Figure 1AAs shown, the collimating element 120A is disposed opposite the reflective module 140. The collimating element 120A can improve the collimation of the first light beam L1' and the second light beam L2' passing therethrough. In one embodiment, the collimating element 120A is a collimating lens group comprising a plurality of lenses. The collimating lens group utilizes a plurality of lenses to achieve collimation of the light beams.

[0059] like Figure 1A As shown, the focusing element 120B is disposed between the light pipe 170 and the deflecting element (the first deflecting element 130A and / or the second deflecting element 130B). The focusing element 120B can reduce the beam diameters of the first light beam L1 and the second light beam L2 passing through it, so that the entire light spot of the first light beam L1 and the entire light spot of the second light beam L2 can be incident on the light incident surface 170s of the light pipe 170 and enter the interior of the light pipe 170.

[0060] like Figure 1A As shown, the first and second deflecting elements 130A and 130B are disposed between the collimating element 120A and the focusing element 120B. The first and second deflecting elements 130A and 130B are, for example, bidirectional beam splitters that allow light with wavelengths other than the first wavelength to pass through. Specifically, the bidirectional beam splitters reflect light beams with the first wavelength (e.g., the first and second light beams L1 and L2), but allow light beams with the second wavelength (e.g., the first and second light beams L1' and L2' reflected from the reflection module 140) to pass through.

[0061] like Figure 1A As shown, the different tilt angles of the first deflecting element 130A and the second deflecting element 130B improve the symmetry or centering of the light spot incident on the light pipe 170. Specifically, the light spots of the first light beam L1 and the second light beam L2 incident on the light incident surface 170s of the light pipe 170 are highly symmetric with respect to the X-axis or the Y-axis. Therefore, the first light beam L1 and the second light beam L2 incident on the light incident surface 170s are mixed more evenly, thereby improving the color uniformity of the projected image.

[0062] like Figure 1AAs shown, the distal angle AF of the first and second deflectors 130A, 130B is smaller than the paraxial angle AC of the proximal deflectors. "Distal" herein means farther from the optical axis AX1 along the Y-axis (substantially perpendicular to the optical axis AX1) than the "paraxial" deflectors. For example, the first deflector 130A is farther from the optical axis AX1 than the second deflector 130B (e.g., along the Y-axis, which is substantially perpendicular to the optical axis AX1). Thus, the first deflector 130A is distal, while the second deflector 130B is paraxial. The first deflector 130A has a distal angle AF, while the second deflector 130B has a paraxial angle AC. Since the first deflecting element 130A is farther from the optical axis AX1 than the second deflecting element 130B, the first light beam L1 is farther from the optical axis AX1 than the second light beam L2 , and the first light beam L1 ′ reflected from the reflection module 140 is farther from the optical axis AX1 than the second light beam L2 ′ reflected from the reflection module 140 .

[0063] like Figure 1A As shown, the distal tilt angle AF is smaller than the paraxial tilt angle AC. In an embodiment, the light incident surface 130As of the first refraction element 130A has a first normal N1. The distal tilt angle AF is, for example, the angle between the first normal N1 and the first light beam L1 incident on the light incident surface 130As. The light incident surface 130Bs of the second refraction element 130B has a second normal N2. The paraxial tilt angle AC is, for example, the angle between the second normal N2 and the second light beam L2 incident on the light incident surface 130Bs. In one embodiment, the distal tilt angle AF is, for example, between 40 degrees (inclusive) and 45 degrees (excluding 45 degrees), for example, 43.5 degrees, while the paraxial tilt angle AC is, for example, 45 degrees.

[0064] By reducing the far-axis tilt angle AF of the far-axis (for example, from 45 degrees to 43.5 degrees), the geometric center of the area where the first light spot SP11 of the first light beam L1 is projected on the reflection module 140 can be closer to the optical axis AX1, and the overlapping area between the area where the first light spot SP11 is projected on the reflection module 140 and the area where the second light spot SP12 of the second light beam L2 is projected on the reflection module 140 can be increased.

[0065] like Figure 1A and Figure 1BAs shown, in this embodiment, the reflective module 140 is, for example, a wavelength conversion module. The reflective module 140 includes a reflective layer 141 and a wavelength conversion layer 142, wherein the wavelength conversion layer 142 is disposed on the reflective surface of the reflective layer 141. The reflective layer 141 is, for example, an aluminum layer or a ceramic layer. The reflective layer 141 is, for example, in the form of a sheet. The reflective surface of the reflective layer 141 is, for example, a polished metal surface, a mirror surface, or a coated surface. The wavelength conversion layer 142 is, for example, capable of converting a first wavelength of a light beam into a second wavelength. In this embodiment, the wavelength conversion layer 142 includes a plurality of fluorescent particles 1421, which excite the first wavelength of the light beam into a second wavelength. The fluorescent particles 1421 are, for example, yellow fluorescent particles, and the second wavelength is, for example, a yellow light wavelength. Furthermore, the wavelength conversion layer 142 is in the form of an open ring, such as a C-shaped ring, with an opening 142C exposing the reflective layer 141. When the light beam is incident on the wavelength conversion layer 142, the first wavelength of the light beam is converted into the second wavelength. When the light beam enters the opening 142C of the wavelength conversion layer 142 , the first wavelength of the light beam is not converted and the light beam is reflected by the exposed reflective layer 141 .

[0066] In addition, the reflection module 140 can be a static reflection module or a dynamic reflection module.

[0067] For example, in the dynamic reflection module, Figure 1A and 1B As shown, the reflective module 140 can rotate about the optical axis AX1 relative to the collimator 120A or other components of the light source system 100A. Specifically, the reflective module 140 is, for example, a rotating phosphor wheel (PW), which can sequentially convert a first wavelength of the light beam into a second wavelength (when the light beam is excited by the wavelength conversion layer 142).

[0068] For a static reflection module, in another embodiment, Figure 1D_1 and Figure 1D_2As shown, the reflective module 140' includes a reflective layer 141, a wavelength conversion layer 142, and a diffusion layer 143. The wavelength conversion layer 142 is formed on one region of the reflective surface 141s of the reflective layer 141, while the diffusion layer 143 is formed on another region of the reflective surface 141s of the reflective layer 141. The wavelength conversion layer 142 and the diffusion layer 143 may cover at least a portion of the reflective surface 141s. The reflective surface 141s may be, for example, a polished metal surface, a mirrored surface, or a coated surface. The diffusion layer 143 may be, for example, a coating, a machined layer (e.g., frosted or bead-blasted), etc., which can scatter the light passing through it. The diffusion layer 143 may be formed separately and then disposed on the reflective layer 141, or it may be integrally formed with the reflective layer 141. The light spot SP' of the light beam is incident on both the wavelength conversion layer 142 and the diffusion layer 143 simultaneously. Thus, the light beam with the first wavelength is excited by the wavelength conversion layer 142 and becomes a light beam with the second wavelength, which can be mixed with the light beam (with the first wavelength) that has passed through the diffusion layer 143. In one embodiment, the first wavelength is a blue wavelength and the second wavelength is a yellow wavelength. The light beam with the first wavelength and the light beam with the second wavelength mix to form white light.

[0069] For example, in other embodiments, the static reflection module Figure 1E_1 and 1E_2 As shown, the reflective module 140" includes a reflective layer 141 and a wavelength conversion layer 142. The wavelength conversion layer 142 is formed in a region of the reflective surface 141s of the reflective layer 141, while another region of the reflective surface 141s is exposed. The light spot SP' of the light beam is simultaneously incident on the wavelength conversion layer 142 and the exposed reflective surface 141s. In this way, the light beam with a first wavelength is excited by the wavelength conversion layer 142 and becomes a light beam with a second wavelength. The second wavelength can be mixed with the light beam (with the first wavelength) reflected from the reflective surface 141s.

[0070] like Figure 1A As shown, the first light diffuser 150A is disposed between the first light source 110A and the first deflector 130A and is used to transmit the first light beam L1 to the first deflector 130A. The second light diffuser 150B is disposed between the second light source 110B and the second deflector 130B and is used to transmit the second light beam L2 to the second deflector 130B.

[0071] like Figure 1CAs shown, the first light homogenizer 150A can homogenize the light beam. In detail, when the coherence of the first light beam L1 is high, the light spot projected on the reflective module 140 presents multiple obvious light spots. The first light homogenizer 150A can diffuse the first light beam L1 passing through it, making the light spot projected on the reflective module 140 more uniform (without obvious light spots). In one embodiment, the first light homogenizer 150A is, for example, a lens array. Similar to the first light homogenizer 150A, the second light homogenizer 150B can also homogenize the light beam. In detail, when the coherence of the second light beam L2 is high, the light spot projected on the reflective module 140 presents multiple obvious light spots. The second light homogenizer 150B can diffuse the second light beam L2 passing through it, making the light spot projected on the reflective module 140 more uniform (without obvious light spots). In one embodiment, the second light homogenizer 150B is, for example, a lens array.

[0072] like Figure 1C As shown, the first light homogenizer 150A includes at least one light homogenizer unit 150A1. A plurality of light homogenizer units 150A1 are arranged in an array (in the XZ plane). Each light homogenizer unit 150A1 has a first curvature radius r1 in the YZ plane and a second curvature radius r2 in the XY plane, wherein the first curvature radius r is the same as or different from the second curvature radius r2. Similarly, the second light homogenizer 150B also includes at least one light homogenizer unit (not shown). The light homogenizer unit of the second light homogenizer 150B has the same or similar structure as the light homogenizer unit 150A1 of the first light homogenizer 150A, and will not be described in detail here. In addition, the curvature radius (for example, the first curvature radius and / or the second curvature radius) of the light homogenizer corresponding to the distal axis is smaller than the curvature radius of the light homogenizer unit of the proximal axis. In this embodiment, the curvature radius (eg, first curvature radius and / or second curvature radius) of the light homogenizing unit 150A1 corresponding to the first light refraction element 130A (distal) is smaller than the curvature radius of the light homogenizing unit (not shown) of the second light refraction element 130B (proximal).

[0073] In one embodiment, the area of ​​the light diffuser unit of the light diffuser corresponding to the distal axis may be smaller than the area of ​​the light diffuser unit of the light diffuser corresponding to the proximal axis.

[0074] Due to aberrations, the image is not reflected by the far-axis lens (e.g. Figure 1A The deformation of the light spot formed by the first deflecting element 130A) is greater than that formed by the paraxial one (for example, Figure 1A The deformation of the light spot formed by the second deflecting element 130B is large, resulting in poor optomechanical efficiency. However, in the embodiments of the present invention, the curvature radius of the light homogenizer corresponding to the distal axis is smaller than the curvature radius of the light homogenizer corresponding to the proximal axis, and / or the area of ​​the light homogenizer corresponding to the distal axis is smaller than the area of ​​the light homogenizer corresponding to the proximal axis. This makes the light spot formed by the distal axis and the light spot formed by the proximal axis similar, thereby improving optomechanical efficiency.

[0075] like Figure 1A As shown, the first reflector 160A is disposed relative to the first light source 110A and is used to reflect the first light beam L1. The second reflector 160B is disposed relative to the second light source 110B and is used to reflect the second light beam L2. Specifically, the first reflector 160A and the second reflector 160B are reflectors. In another embodiment, the light source system 100A may omit the first reflector 160A, and the first light-emitting surface 110As of the first light source 110A may face the first light homogenizer 150A. Similarly, in another embodiment, the light source system 100A may omit the second reflector 160B, and the second light-emitting surface 110Bs of the second light source 110B may face the second light homogenizer 150B.

[0076] like Figure 1A As shown, the light pipe 170 is disposed downstream of the focusing element 120B and has a central axis AX2. The central axis AX2 and the optical axis AX1 may substantially overlap, but this is not intended to limit the present invention. The light beam incident into the light pipe 170 may be reflected multiple times within the light pipe 170 and uniformly mixed.

[0077] The light source system 100A of the aforementioned embodiment is described by assuming that the first deflector 130A is distal and disposed on the first side S1, while the second deflector 130B is proximal and disposed on the second side S2. However, this is not intended to limit the present invention. In another embodiment, the first deflector 130A may be proximal and the second deflector 130B may be distal. In still other embodiments, the first deflector 130A may be disposed on the second side S2, while the second deflector 130B may be disposed on the first side S1.

[0078] Please refer to Figure 4 , which illustrates a schematic diagram of a light source system 100B according to another embodiment of the present invention. Light source system 100B includes a first light source 110A, a second light source 110B, a collimating element 120A, a focusing element 120B, a first deflecting element 130A, a second deflecting element 130B, a reflective module 140, a first light homogenizing element 150A, a second light homogenizing element 150B, a first reflective element 160A, a second reflective element 160B, and a light pipe 170. Light source system 100B includes similar or identical technical features to light source system 100A, except that first deflecting element 130A is disposed proximally on the first side S1, while second deflecting element 130B is disposed distally on the second side S2.

[0079] like Figure 4As shown, the distal tilt angle AF is smaller than the paraxial tilt angle AC. In an embodiment, the light incident surface 130As of the first refraction element 130A has a first normal N1, and the paraxial tilt angle AC is, for example, the angle between the first normal N1 and the first light beam L1 incident on the light incident surface 130As. The light incident surface 130Bs of the second refraction element 130B has a second normal N2, and the distal tilt angle AF is, for example, the angle between the second normal N2 and the second light beam L2 incident on the light incident surface 130Bs. In one embodiment, the distal tilt angle AF is, for example, between 40 degrees (inclusive) and 45 degrees (excluding 45 degrees), for example, 43.5 degrees, while the paraxial tilt angle AC is, for example, 45 degrees.

[0080] Please refer to Figure 5 , which illustrates a schematic diagram of a light source system 100C according to another embodiment of the present invention. Light source system 100C includes a first light source 110A, a second light source 110B, a collimating element 120A, a focusing element 120B, a first deflecting element 130A, a second deflecting element 130B, a reflective module 140, a first light homogenizing element 150A, a second light homogenizing element 150B, a first reflective element 160A, a second reflective element 160B, and a light pipe 170. Light source system 100C includes similar or identical technical features to light source system 100A, except that first deflecting element 130A is disposed distally on the second side S2, while second deflecting element 130B is disposed proximally on the first side S1.

[0081] like Figure 5 As shown, the distal tilt angle AF is smaller than the paraxial tilt angle AC. In an embodiment, the light incident surface 130As of the first refraction element 130A has a first normal N1. The distal tilt angle AF is, for example, the angle between the first normal N1 and the first light beam L1 incident on the light incident surface 130As. The light incident surface 130Bs of the second refraction element 130B has a second normal N2. The paraxial tilt angle AC is, for example, the angle between the second normal N2 and the second light beam L2 incident on the light incident surface 130Bs. In one embodiment, the distal tilt angle AF is, for example, between 40 degrees (inclusive) and 45 degrees (excluding 45 degrees), for example, 43.5 degrees, while the paraxial tilt angle AC is, for example, 45 degrees.

[0082] Please refer to Figure 6, which illustrates a schematic diagram of a light source system 100D according to another embodiment of the present invention. Light source system 100D includes a first light source 110A, a second light source 110B, a collimating element 120A, a focusing element 120B, a first deflecting element 130A, a second deflecting element 130B, a reflection module 140, a first light homogenizing element 150A, a second light homogenizing element 150B, a first reflective element 160A, a second reflective element 160B, and a light pipe 170. Light source system 100D includes similar or identical technical features to light source system 100A, except that first deflecting element 130A is disposed proximally on the second side S2, while second deflecting element 130B is disposed distally on the first side S1.

[0083] like Figure 6 As shown, the distal tilt angle AF is smaller than the paraxial tilt angle AC. In an embodiment, the light incident surface 130As of the first refraction element 130A has a first normal N1, and the paraxial tilt angle AC is, for example, the angle between the first normal N1 and the first light beam L1 incident on the light incident surface 130As. The light incident surface 130Bs of the second refraction element 130B has a second normal N2, and the distal tilt angle AF is, for example, the angle between the second normal N2 and the second light beam L2 incident on the light incident surface 130Bs. In one embodiment, the distal tilt angle AF is, for example, between 40 degrees (inclusive) and 45 degrees (excluding 45 degrees), for example, 43.5 degrees, while the paraxial tilt angle AC is, for example, 45 degrees.

[0084] Please refer to Figure 7 , which illustrates a schematic diagram of a light source system 100E according to another embodiment of the present invention. Light source system 100E includes a first light source 110A, a second light source 110B, a collimating element 120A, a focusing element 120B, a first refraction element 130A, a second refraction element 130B, a reflection module 140, a first light homogenizer 150A, a second light homogenizer 150B, a first reflector 160A, and a light pipe 170. Light source system 100E includes similar or identical technical features to light source system 100A, except that the second light source 110B, the second light homogenizer 150B, and the second refraction element 130B can be disposed on the second side S2, and the second reflector 160B can be omitted from light source system 100E.

[0085] In this embodiment, the second refraction element 130B of the light source system 100E is a paraxial one. In another embodiment, Figure 1A The first light source 110A, the first light homogenizer 150A and the first light refraction element 130A of the light source system 100A can be arranged on the second side S2, and the first light refraction element 130A is the distal one, and the second light refraction element 130B is the proximal one. In other embodiments, Figure 1AThe first light source 110A, the first light diffuser 150A, and the first light refraction element 130A of the light source system 100A may be disposed on the second side S2 , with the first light refraction element 130A being the proximal one and the second light refraction element 130B being the distal one.

[0086] In summary, an embodiment of the present invention provides a light source system comprising two light sources and two refractive elements. In one embodiment, the two light sources can be arranged on the same side or on opposite sides of an optical axis (e.g., the optical axis of a collimator). When the two light sources are arranged on the same side of the optical axis, the two refractive elements are respectively arranged on opposite sides of the optical axis, wherein one of the two refractive elements is distal and the other is proximal. When the two light sources are arranged on opposite sides of the optical axis, the two refractive elements are respectively arranged on opposite sides of the optical axis, wherein one of the two refractive elements is distal and the other is proximal. In one embodiment, the distal and proximal elements differ in tilt angle, thereby adjusting the spot position of the light beam emitted by each light source, thereby improving aberration and decentering problems.

[0087] The present invention has been described with reference to the above embodiments. However, the above embodiments are merely exemplary embodiments of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and improvements that do not depart from the spirit and scope of the present invention are intended to be protected by the present invention.

Claims

1. A light source system, characterized in that: Include: a collimating member having an optical axis; A first light source is disposed on a first side or a second side of the optical axis and is configured to emit a first light beam, wherein the first side and the second side are opposite sides of the optical axis; a second light source, disposed on the first side or the second side of the optical axis and configured to emit a second light beam; a first light-reflecting element disposed on one of the first side and the second side of the optical axis and configured to reflect the first light beam; a second light-reflecting element disposed on the other of the first side and the second side of the optical axis and configured to reflect the second light beam; and a reflection module, configured to reflect the first light beam reflected from the first refraction element and the second light beam reflected from the second refraction element; One of the first refraction element and the second refraction element is a proximal element, and the other is a distal element. The proximal element is closer to the optical axis than the distal element. The first refraction element and the second refraction element have different tilt angles.

2. The light source system according to claim 1, wherein The distal inclination angle of the distal axis is smaller than the proximal inclination angle of the proximal axis.

3. The light source system according to claim 1, wherein Also includes: A light pipe is disposed downstream of the reflection module and has a central axis; The central axis overlaps with the optical axis.

4. The light source system according to claim 1, wherein: Also includes: a first light homogenizing element, disposed between the first light source and the first light-refracting element and configured to reflect the first light beam toward the first light-refracting element; as well as The second light homogenizing element is disposed between the second light source and the second refracting element and is used for reflecting the second light beam to the second refracting element.

5. The light source system according to claim 4, wherein: The first light homogenizer and the second light homogenizer both include a light homogenizer unit; the curvature radius of the light homogenizer unit of the first light homogenizer or the second light homogenizer corresponding to the distal axis is smaller than the curvature radius of the light homogenizer unit of the second light homogenizer or the first light homogenizer corresponding to the proximal axis.

6. The light source system according to claim 1, wherein: Also includes: A first reflector, disposed opposite to the first light source and configured to reflect the first light beam; as well as The second reflector is disposed opposite to the second light source and is used for reflecting the second light beam.

7. The light source system according to claim 1, wherein: The first light source has a first light-emitting surface, and the second light source has a second light-emitting surface. The first light-emitting surface and the second light-emitting surface face opposite directions respectively.

8. The light source system according to claim 1, wherein: The first light source is a light source that emits monochromatic light.

9. The light source system according to claim 8, wherein: The reflection module includes a reflection layer and a wavelength conversion layer, and the wavelength conversion layer is configured on the reflection layer.

10. The light source system according to claim 8, wherein: The first refraction element and the second refraction element are bidirectional beam splitters; The first light beam has a first wavelength, and the bidirectional beam splitter reflects the light of the first wavelength and allows light other than the first wavelength to pass through.

11. The light source system according to claim 1, wherein: Also includes: light guides; as well as A light concentrating element is disposed between the light pipe and the first light-reflecting element.

12. The light source system according to claim 1, wherein: Also includes: Concentrator; The first refracting element and the second refracting element are disposed between the collimating element and the focusing element.

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