Light source system

Abstract

The utility model 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 utility model relates to the field of light sources, 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 a plurality of optical elements with different functions in order to provide an illumination light to a projection module. However, these optical elements often result in the projector or the light source system being too large in size.

[0003] In the prior art, in order to reduce the volume of the light source system, a common method is to allow the light beams emitted by each laser light source to pass through the same refraction element and then enter a collimator, and then be projected to a reflection module through the collimator to form a plurality of light spots. However, this method will cause the light spot positions of the light beams emitted by each light source to have poor overlap, and the geometric center of each light spot will also have a large deviation from the optical axis of the collimator, thereby causing aberration and eccentricity problems.

[0004] Therefore, it is necessary to design a new light source system to overcome the above defects. Utility Model Content

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

[0006] To achieve the above object, the utility model provides a light source system, including 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 used to emit a first light beam, wherein the first side and the second side are two opposite sides of the optical axis;

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

[0009] A first light-bending element, disposed at one of the first side and the second side of the optical axis and used for reflecting the first light beam;

[0010] A second light-bending element disposed on the other of the first side and the second side of the optical axis and used for reflecting the second light beam; and

[0011] A reflection module, used for reflecting the first light beam reflected from the first light-bending element and the second light beam reflected from the second light-bending 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 guide pipe is disposed downstream of the reflection module and has a central axis;

[0016] Wherein, the central axis overlaps with the optical axis.

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

[0018] A first light homogenizing member, disposed between the first light source and the first light refracting member and used for reflecting the first light beam to the first light refracting member; and

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

[0021] Preferably, it also includes:

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

[0023] The second reflector is arranged 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, 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 reflection module includes a reflection layer and a wavelength conversion layer, and the wavelength conversion layer is disposed on the reflection layer.

[0027] Preferably, the first light-refracting element and the second light-refracting element are bidirectional light-splitting elements;

[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 guide; and

[0031] A light concentrating member is disposed between the light guide and the first light refraction member.

[0032] Preferably, it also includes:

[0033] Light concentrator;

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

[0035] Compared with the prior art, the light source system provided by the utility model is based on the optical axis of the collimator, and the light path is divided into an off-axis area and a near-axis area. One of the first refraction element and the second refraction element is a near-axis element, and the other is a far-axis element, and the inclination angles are different, thereby adjusting the position of the first light spot projected on the reflection module by the first light beam and the position of the second light spot projected on the reflection module by the second light beam, increasing the overlapping area of ​​the first light spot and the second light spot, improving the aberration and eccentricity problems, and thus improving the color uniformity of the projected image. In addition, the light source system provided by the utility model has a compact structure, which can reduce the volume of the light source system and is more suitable for small or micro projectors. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0038] Figure 1C A schematic diagram of the first light homogenizer of FIG. 1A is shown.

[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 of 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 on the reflector by the first light beam and a second light spot projected on the reflector by the second light beam.

[0044] Figure 3 A schematic diagram showing 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. 4 is a schematic diagram showing a light source system according to another embodiment of the present invention.

[0046] Figure 5 FIG. 4 is a schematic diagram showing a light source system according to another embodiment of the present invention.

[0047] Figure 6 FIG. 4 is a schematic diagram showing a light source system according to another embodiment of the present invention.

[0048] Figure 7 FIG. 4 is a schematic diagram showing 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 words are used in the specification and claims to refer to specific components. Those with ordinary knowledge in the field should understand that manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but rather use differences in components' functions as the criteria for distinction. The term "including" mentioned throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to".

[0051] Please refer to FIGS. 1A to 1E_2, 2 and 3. FIG. 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 in FIG. Figure 1C Draw Figure 1A FIG. 1 is a schematic diagram of a first light homogenizing element 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 a first light beam and a second light spot SP12' projected by a second light beam of a light source system of a 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 refracting element 130A, a second refracting element 130B, a reflecting module 140, a first light homogenizing element 150A, a second light homogenizing element 150B, a first reflecting element 160A, a second reflecting element 160B and a light pipe 170.

[0053] like Figure 1A and Figure 2 As shown, the collimator 120A has an optical axis AX1. The first light source 110A is disposed on the first side S1 or the second side S2 of the optical axis AX1 and is used to emit a first light beam L1, wherein the first side S1 and the second side S2 are respectively located on opposite sides of the optical axis AX1. The second light source 110B is disposed on the first side S1 or the second side of the optical axis AX1 and is used to emit a second light beam L2. The first refractor 130A is disposed on one of the first side S1 and the second side S2 of the optical axis AX1 and is used to reflect the first light beam L1. The second refractor 130B is disposed on the other of the first side S1 and the second side S2 of the optical axis AX1 and is used to reflect the second light beam L2. The reflection module 140 is used to reflect the first light beam L1 reflected from the first refractor 130A and the second light beam L2 reflected from the second refractor 130B. The proximal part of the first refractor 130A and the second refractor 130B is closer to the optical axis AX1 than the distal part of the first refractor 130A and the second refractor 130B. In the embodiment, the first refractor 130A and the second refractor 130B are different in inclination angle, thereby adjusting the position of the first light spot SP11 projected by the first light beam L1 on the reflection module 140 and the position of the second light spot SP12 projected by the second light beam L2 on the reflection module 140, increasing the overlapping area of ​​the first light spot SP11 and the second light spot SP12, and improving the aberration and decentering problems.

[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 of the first light beam L1 projected on the reflection module 140 and the geometric center C2 of the area of ​​the second light spot SP12 of the second light beam L2 projected 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, the conventional afocal system can be omitted, so the volume of the light source system 100A can be reduced, making the light source system 100A more suitable for small or micro projectors.

[0056] like Figure 1A As shown, the first light beam L1 emitted from the 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, and then, after being reflected from the reflective module 140, sequentially passes through the collimator 120A and the light condenser 120B to the light guide 170. In addition, the second light beam L2 emitted from the 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, and then, after being reflected from the reflective module 140, sequentially passes through the collimator 120A and the light condenser 120B to the light guide 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, and the first light emitting surface 110As and the second light emitting surface 110Bs face opposite directions respectively. 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, for example, 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 relative to the reflection module 140, and the collimating element 120A can improve the collimation of the first light beam L1' and the second light beam L2' passing therethrough. In an embodiment, the collimating element 120A is a collimating lens group, which includes a plurality of lenses. The collimating lens group uses a plurality of lenses to achieve the collimation of the light beams.

[0059] like Figure 1A As shown, the condenser 120B is disposed between the light pipe 170 and the refraction element (the first refraction element 130A and / or the second refraction element 130B). The condenser 120B can reduce the beam diameter of the first light beam L1 and the beam diameter of 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 into the interior of the light pipe 170.

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

[0061] like Figure 1A As shown, since the first light refracting element 130A and the second light refracting element 130B are different in tilt angle, the symmetry or centering of the light spot incident to the light pipe 170 can be improved. In detail, the light spot of the first light beam L1 and the light spot of the second light beam L2 incident to the light incident surface 170s of the light pipe 170 are highly symmetric with respect to the X-axis or the Y-axis, so the mixed light of the first light beam L1 and the second light beam L2 incident to the light incident surface 170s is more uniform, which can improve the color uniformity of the projected image.

[0062] like Figure 1AAs shown, the distal inclination angle AF of the distal one of the first refractor 130A and the second refractor 130B is smaller than the proximal inclination angle AC of the proximal one. The "distal one" herein is farther from the optical axis AX1 along the Y axis (substantially perpendicular to the optical axis AX1) than the "proximal one". For example, the first refractor 130A is farther from the optical axis AX1 (e.g., along the Y axis, which is substantially perpendicular to the optical axis AX1) than the second refractor 130B, so the first refractor 130A is the distal one, and the second refractor 130B is the proximal one. The first refractor 130A has the distal inclination angle AF, and the second refractor 130B has the proximal inclination angle AC. Since the first light refraction element 130A is farther from the optical axis AX1 than the second light refraction 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 far-axis tilt angle AF is smaller than the near-axis tilt angle AC. In an embodiment, the light incident surface 130As of the first refraction element 130A has a first normal N1, and the far-axis 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, and the near-axis 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 far-axis tilt angle AF is, for example, between 40 degrees (including 40 degrees) and 45 degrees (excluding 45 degrees), for example, 43.5 degrees, and the near-axis 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 reflection module 140 is projected by the first light beam L1 can be closer to the optical axis AX1, and the overlapping area between the area where the first light spot SP11 of the reflection module 140 is projected by the second light beam L2 and the area where the second light spot SP12 of the reflection module 140 is projected by the second light beam L2 can be increased.

[0065] like Figure 1A and Figure 1BAs shown, in this embodiment, the reflection module 140 is, for example, a wavelength conversion module. The reflection module 140 includes a reflection layer 141 and a wavelength conversion layer 142, wherein the wavelength conversion layer 142 is disposed on the reflection surface of the reflection layer 141. The reflection layer 141 is, for example, an aluminum layer / ceramic layer. The reflection layer 141 is, for example, in the form of a sheet. The reflection surface of the reflection layer 141 is, for example, a metal polishing surface, a mirror surface, or a coating surface. The wavelength conversion layer 142 can, for example, convert the first wavelength of the 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. In addition, the wavelength conversion layer 142 is in an open ring shape, for example, a C-shaped ring, and its opening 142C exposes the reflection layer 141. When the light beam is incident on the wavelength conversion layer 142, the first wavelength of the light beam is converted into a 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 may 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 around 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 the first wavelength of the light beam into the 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 reflection module 140' includes a reflection layer 141, a wavelength conversion layer 142 and a diffusion layer 143, wherein the wavelength conversion layer 142 is formed in an area of ​​the reflection surface 141s of the reflection layer 141, and the diffusion layer 143 is formed in another area of ​​the reflection surface 141s of the reflection layer 141. The wavelength conversion layer 142 and the diffusion layer 143 can cover at least a portion of the reflection surface 141s. The reflection surface 141s is, for example, a metal polishing surface, a mirror surface or a coating surface. The diffusion layer 143 is, for example, a coating, a machined layer (for example, frosting, beading), etc., which can scatter the light passing through. The diffusion layer 143 can be formed separately and then arranged on the reflection layer 141, or the diffusion layer 143 can be formed integrally with the reflection layer 141. The light spot SP' of the light beam is incident on the wavelength conversion layer 142 and the diffusion layer 143 at the same time. Thus, the light beam with the first wavelength is excited by the wavelength conversion layer 142 to become a light beam with the second wavelength, which can be mixed with the light beam (with the first wavelength) that penetrates the diffusion layer 143. In one embodiment, the first wavelength is a blue light wavelength, the second wavelength is a yellow light wavelength, and the light beam with the first wavelength and the light beam with the second wavelength are mixed to become white light.

[0069] For a static reflection module, in other embodiments, Figure 1E_1 and 1E_2 As shown, the reflection module 140" includes a reflection layer 141 and a wavelength conversion layer 142. The wavelength conversion layer 142 is formed in an area of ​​the reflection surface 141s of the reflection layer 141, and another area of ​​the reflection surface 141s is exposed. The light spot SP' of the light beam is incident on the wavelength conversion layer 142 and the exposed reflection surface 141s at the same time. In this way, the light beam with the first wavelength is excited by the wavelength conversion layer 142 to become a light beam with a second wavelength, which can be mixed with the light beam (with the first wavelength) reflected from the reflection surface 141s.

[0070] like Figure 1A As shown, the first light homogenizer 150A is disposed between the first light source 110A and the first light refraction member 130A and is used to transmit the first light beam L1 to the first light refraction member 130A. The second light homogenizer 150B is disposed between the second light source 110B and the second light refraction member 130B and is used to transmit the second light beam L2 to the second light refraction member 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 reflection module 140 presents multiple obvious light spots. The first light homogenizer 150A can diffuse the first light beam L1 passing through it, so that the light spot projected on the reflection module 140 is more uniform (without obvious light spots). In one embodiment, the first light homogenizer 150A is, for example, a lens array (LensArray). 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 reflection module 140 presents multiple obvious light spots. The second light homogenizer 150B can diffuse the second light beam L2 passing through it, so that the light spot projected on the reflection module 140 is 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 radius of curvature r1 in the YZ plane and a second radius of curvature r2 in the XY plane, wherein the first radius of curvature r is the same as or different from the second radius of curvature r2. Similarly, the second light homogenizer 150B also includes at least one light homogenizer unit (not shown), and 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, which will not be described in detail here. In addition, the radius of curvature (for example, the first radius of curvature and / or the second radius of curvature) of the light homogenizer corresponding to the distal axis is smaller than the radius of curvature of the light homogenizer unit corresponding to 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 homogenizing unit of the light homogenizing element corresponding to the distal axis may be smaller than the area of ​​the light homogenizing unit of the light homogenizing element corresponding to the proximal axis.

[0074] Due to aberrations, the image is not directly reflected by the distant axis (e.g. Figure 1A The deformation of the light spot formed by the first refraction 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 refraction member 130B) is large, resulting in poor light-machine efficiency. However, by making the curvature radius of the light-homogenizing unit corresponding to the far-axis smaller than the curvature radius of the light-homogenizing unit corresponding to the near-axis and / or the area of ​​the light-homogenizing unit corresponding to the far-axis smaller than the area of ​​the light-homogenizing unit corresponding to the near-axis in the embodiment of the utility model, the light spot formed by the far-axis is similar to the light spot formed by the near-axis, which can improve the light-machine efficiency.

[0075] like Figure 1A As shown, the first reflector 160A is arranged relative to the first light source 110A and is used to reflect the first light beam L1. The second reflector 160B is arranged 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 homogenizing member 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 homogenizing member 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, which can substantially overlap with the optical axis AX1, but this is not intended to limit the embodiments of the present invention. The light beam incident into the light pipe 170 can be reflected multiple times in the light pipe 170 to be uniformly mixed.

[0077] The light source system 100A of the aforementioned embodiment is described by taking the first light refraction element 130A as a distal element and disposed on the first side S1, and the second light refraction element 130B as a proximal element and disposed on the second side S2 as an example, but this is not intended to limit the embodiments of the present invention. In another embodiment, the first light refraction element 130A may be a proximal element, and the second light refraction element 130B may be a distal element. In other embodiments, the first light refraction element 130A may be disposed on the second side S2, and the second light refraction element 130B may be disposed on the first side S1.

[0078] Please refer to Figure 4 , which is a schematic diagram of a light source system 100B according to another embodiment of the present invention. The 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 refraction element 130A, a second refraction element 130B, a reflection module 140, a first light homogenizing element 150A, a second light homogenizing element 150B, a first reflection element 160A, a second reflection element 160B and a light guide 170. The light source system 100B includes similar or identical technical features to the light source system 100A, except that the first refraction element 130A is disposed on the first side S1 and is proximal, while the second refraction element 130B is disposed on the second side S2 and is distal.

[0079] like Figure 4As shown, the far-axis tilt angle AF is smaller than the near-axis tilt angle AC. In an embodiment, the light incident surface 130As of the first refraction element 130A has a first normal N1, and the near-axis 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 far-axis 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 far-axis tilt angle AF is, for example, between 40 degrees (including 40 degrees) and 45 degrees (excluding 45 degrees), for example, 43.5 degrees, and the near-axis tilt angle AC is, for example, 45 degrees.

[0080] Please refer to Figure 5 , which is a schematic diagram of a light source system 100C according to another embodiment of the present invention. The 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 refraction element 130A, a second refraction element 130B, a reflection module 140, a first light homogenizing element 150A, a second light homogenizing element 150B, a first reflection element 160A, a second reflection element 160B and a light guide 170. The light source system 100C includes similar or identical technical features to the light source system 100A, except that the first refraction element 130A is disposed on the second side S2 and is distal, while the second refraction element 130B is disposed on the first side S1 and is proximal.

[0081] like Figure 5 As shown, the far-axis tilt angle AF is smaller than the near-axis tilt angle AC. In an embodiment, the light incident surface 130As of the first refraction element 130A has a first normal N1, and the far-axis 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, and the near-axis 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 far-axis tilt angle AF is, for example, between 40 degrees (including 40 degrees) and 45 degrees (excluding 45 degrees), for example, 43.5 degrees, and the near-axis tilt angle AC is, for example, 45 degrees.

[0082] Please refer to Figure 6, which is a schematic diagram of a light source system 100D according to another embodiment of the present invention. The 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 refraction element 130A, a second refraction element 130B, a reflection module 140, a first light homogenizing element 150A, a second light homogenizing element 150B, a first reflection element 160A, a second reflection element 160B and a light guide 170. The light source system 100D includes similar or identical technical features to the light source system 100A, except that the first refraction element 130A is disposed on the second side S2 and is proximal, while the second refraction element 130B is disposed on the first side S1 and is distal.

[0083] like Figure 6 As shown, the far-axis tilt angle AF is smaller than the near-axis tilt angle AC. In an embodiment, the light incident surface 130As of the first refraction element 130A has a first normal N1, and the near-axis 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 far-axis 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 far-axis tilt angle AF is, for example, between 40 degrees (including 40 degrees) and 45 degrees (excluding 45 degrees), for example, 43.5 degrees, and the near-axis tilt angle AC is, for example, 45 degrees.

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

[0085] In this embodiment, the second refraction element 130B of the light source system 100E is a paraxial one. Figure 1A The first light source 110A, the first light homogenizing element 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 homogenizing element 150A and the first light refraction element 130A of the light source system 100A may be disposed on the second side S2, and the first light refraction element 130A is a proximal element, while the second light refraction element 130B is a distal element.

[0086] In summary, an embodiment of the utility model proposes a light source system, including two light sources and two refraction elements. In one embodiment, the two light sources can be arranged on the same side or opposite sides of an optical axis (for example, the optical axis of a collimator). When the two light sources are arranged on the same side of the optical axis, the two refraction elements are respectively arranged on opposite sides of the optical axis, wherein one of the two refraction elements is the far axis and the other is the near axis. When the two light sources are arranged on opposite sides of the optical axis, the two refraction elements are respectively arranged on opposite sides of the optical axis, wherein one of the two refraction elements is the far axis and the other is the near axis. In one embodiment, the far axis and the near axis are different in inclination angle, thereby adjusting the spot position of the light beam emitted by each light source, thereby improving the aberration and eccentricity problems.

[0087] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A light source system, characterized in that: Include: a collimator having an optical axis; A first light source is disposed on a first side or a second side of the optical axis and is used to emit a first light beam, wherein the first side and the second side are two opposite sides of the optical axis; A second light source is disposed on the first side or the second side of the optical axis and is used to emit a second light beam; A first light-bending element, disposed at one of the first side and the second side of the optical axis and used for reflecting the first light beam; A second light-bending element disposed on the other of the first side and the second side of the optical axis and used for reflecting the second light beam; and A reflection module, used for reflecting the first light beam reflected from the first light-bending element and the second light beam reflected from the second light-bending 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, characterized in that: 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 guide pipe is disposed downstream of the reflection module and has a central axis; Wherein, the central axis overlaps with the optical axis.

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

5. The light source system according to claim 4, characterized in that: 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 used to reflect the first light beam; as well as The second reflector is arranged 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, characterized in that: The reflection module comprises a reflection layer and a wavelength conversion layer, and the wavelength conversion layer is arranged on the reflection layer.

10. The light source system according to claim 8, characterized in that: The first light-refracting element and the second light-refracting element are bidirectional light-splitting elements; 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 guide; as well as A light concentrating member is disposed between the light guide and the first light refraction member.

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

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