A white light beam splitter

Abstract

This invention relates to a white light beam splitter, comprising a housing, a collimating lens, and two sets of focusing lenses. The housing contains a first chamber and a second chamber separated by a partition. The partition has two sets of light-transmitting openings, and the side wall of the housing has two sets of receiving holes. The collimating lens is located in the second chamber, and the white light source is located at the focal point of the collimating lens. The two focusing lenses are coaxially aligned with corresponding openings and offset off-axis. This invention utilizes the collimating lens to generate parallel light. The first and second openings on the partition allow for pure geometric segmentation of this parallel light, eliminating the need for amplitude-splitting elements such as beam splitters. The beam energy is almost entirely absorbed or wasted. Since the sum of the effective apertures of the two focusing lenses equals the effective aperture of the collimating lens, the entire parallel beam cross-section is almost completely covered, with no overlap or waste between the two beams, thus achieving lossless segmentation of a beam of light geometrically.

Description

Technical Field

[0001] This application belongs to the field of optical technology, and in particular relates to a white light beam splitter. Background Technology

[0002] In applications such as spectral analysis or white light illumination transmission, it is often necessary to efficiently collect and transmit the light emitted from a white light source to a monochromator, spectrometer, or optical fiber. Sometimes, it is also necessary to split the beam into two paths for different detection channels. High-power white light sources (such as xenon lamps, deuterium lamps, and white laser pump sources) typically exhibit near-spherical emission characteristics, meaning they radiate light in all directions of space. Existing technologies have the following two significant drawbacks when collecting such light sources:

[0003] 1. Low light emission solid angle collection efficiency

[0004] Traditional solutions often employ transmissive lens groups or a single off-axis mirror to collimate the light source. Limited by the lens aperture or the effective aperture of the mirror, these optical elements can only capture the light beam emitted by the light source within a finite solid angle. Light energy radiated in other directions is completely lost and cannot be collected. Increasing the aperture of the collecting element significantly increases size, weight, and cost, and large-aperture achromatic lenses present extremely high material and fabrication challenges in the ultraviolet band. Therefore, existing solutions struggle to achieve efficient collection of spherical white light sources over a large solid angle with a compact structure and reasonable cost.

[0005] II. Inherent loss exists in ultraviolet band beam splitting.

[0006] When it is necessary to split the collected white light into two independent outputs, the conventional approach is to insert a beam splitter in the collimating optical path. However, the ultraviolet component is largely absorbed or scattered during the beam splitting process and cannot be effectively transmitted to the subsequent ultraviolet optical system.

[0007] In summary, existing technologies struggle to simultaneously address the two core challenges of large-angle collection and lossless beam splitting in the ultraviolet band from spherical white light sources. Therefore, a device is needed that can both fully receive the beam from the large divergence angle of the white light source and losslessly split the broadband light (especially the ultraviolet component) into two independently focused outputs to meet the high light throughput requirements of ultraviolet monochromators and other analytical channels. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a white light beam splitter in order to solve at least one of the above-mentioned problems in the prior art.

[0009] The technical solution adopted by this invention to solve its technical problem is:

[0010] A white light beam splitter, comprising:

[0011] The outer shell is hollow inside and has a first chamber, a second chamber, and a partition. The partition is located between the first chamber and the second chamber. The partition has a first opening and a second opening. The side wall of the outer shell has a first receiving hole and a second receiving hole.

[0012] A collimating lens is installed in the second chamber; the focal length of the collimating lens is f1, and the effective aperture is d1.

[0013] A first focusing lens is installed in the first cavity. The incident beam axis of the first focusing lens is coaxial with the axis of the first opening. The focusing direction of the first focusing lens is towards the first receiving hole. The focal length of the first focusing lens is f2, and the effective aperture is d2.

[0014] A second focusing lens is installed in the first cavity. The incident beam axis of the second focusing lens is coaxial with the axis of the second opening. The focusing direction of the second focusing lens is towards the second receiving hole. The focal length of the second focusing lens is f3, and the effective aperture is d3.

[0015] The off-axis direction of the second focusing lens is offset from that of the first focusing lens, f1=f2=f3, d2=d3, d1=2×d2.

[0016] Preferably, the white light beam splitter of the present invention further includes a first optical fiber coupling component and a second optical fiber coupling component, wherein the first optical fiber coupling component is connected to the first receiving aperture; and the second optical fiber coupling component is connected to the second receiving aperture.

[0017] Both the first fiber coupling assembly and the second fiber coupling assembly include:

[0018] Telescopic sleeve, used to fix it to the outer casing;

[0019] Fiber optic connector, used to fix the fiber optic cable and align the fiber end face with the first receiving hole or the second receiving hole;

[0020] An adjustment bracket, connected to the optical fiber connector, is capable of adjusting the radial movement distance of the optical fiber connector;

[0021] Connecting seat, connecting the telescopic sleeve and the adjusting frame;

[0022] The telescopic sleeve can adjust the axial movement distance of the optical fiber connector when it rotates.

[0023] Preferably, in the white light beam splitter of the present invention, the adjustment frame includes:

[0024] The frame is fixed to the connector.

[0025] The adjustment column is movably connected to one side of the frame in the X direction and one side in the Y direction, wherein the X direction is perpendicular to the Y direction, the optical fiber connector is axially along the Z direction, and the Z direction is perpendicular to both the X and Y directions; one end of the adjustment column abuts against the side wall of the optical fiber connector, and the adjustment column can move along the X or Y direction of the frame.

[0026] Preferably, in the white light beam splitter of the present invention, the surfaces of the collimating lens, the first focusing lens, and the second focusing lens are all coated with an aluminum film.

[0027] Preferably, in the white light beam splitter of the present invention, the collimating lens, the first focusing lens, and the second focusing lens are all total internal reflection off-axis parabolic mirrors.

[0028] Preferably, in the white light beam splitter of the present invention, f1=d1.

[0029] Preferably, in the white light beam splitter of the present invention, f1=d1=50.8mm.

[0030] Preferably, in the white light beam splitter of the present invention, a first mounting hole and a second mounting hole are provided on the side wall of the outer shell;

[0031] Both the first focusing lens and the second focusing lens include a lens mount and a mirror surface. The mirror surface is fixed on the lens mount, and the lens mount can be installed in the first mounting hole or the second mounting hole.

[0032] Preferably, in the white light beam splitter of the present invention, both the first mounting hole and the second mounting hole are circular holes, and the mirror mount is rotatable within the first mounting hole or the second mounting hole.

[0033] Preferably, in the white light beam splitter of the present invention, a plurality of screw holes are further provided on the side wall of the housing. The plurality of screw holes are arranged around the first mounting hole and the second mounting hole. By screwing the screws into the plurality of screw holes, the screw heads can fix the first focusing lens and the second focusing lens mount.

[0034] The beneficial effects of this invention are:

[0035] 1. Parallel light is generated using a collimating lens. A first and second opening are provided on the partition plate to perform pure geometric segmentation of the parallel light. No amplitude segmentation element such as a beam splitter is needed, and the beam energy is almost not absorbed or wasted. Since d2=d3 and d1=2×d2, the entire cross section of the parallel beam is almost completely covered, and the two parts of the beam do not overlap or waste, thus achieving lossless segmentation of a beam of light geometrically.

[0036] 2. f1=f2=f3, ensuring the matching of the numerical aperture of the optical path. The first and second focusing lenses, by setting their off-axis directions to be staggered, focus the received split parallel light to two spatially separated focal points, which are received by different receiving ends, thereby configuring two independent focused white light beams to achieve dual-channel white light input. Attached Figure Description

[0037] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0038] Figure 1 This is a schematic diagram of the white light beam splitter structure in this embodiment;

[0039] Figure 2 This is a schematic diagram of the internal structure of each chamber of the white light beam splitter in this embodiment;

[0040] Figure 3 This is a schematic diagram of the fiber optic coupling component structure in this embodiment;

[0041] Figure 4 This is a schematic diagram of the focusing lens fixing structure in this embodiment.

[0042] The attached figures are labeled as follows:

[0043] 1. Outer shell;

[0044] 11. First chamber; 12. Second chamber; 13. Partition; 14. First mounting hole; 15. Second mounting hole; 16. Screw hole; 17. Screw; 111. First receiving hole; 112. Second receiving hole; 131. First opening; 132. Second opening;

[0045] 2. Collimating lens;

[0046] 3. First focusing lens; 31. Lens mount; 32. Mirror surface;

[0047] 4. Second focusing lens;

[0048] 5. First fiber optic coupling assembly; 51. Connector; 52. Fiber optic connector; 53. Telescopic sleeve; 54. Adjustment frame; 541. Frame; 542. Adjustment column;

[0049] 6. Second fiber optic coupling assembly. Detailed Implementation

[0050] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0051] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0053] In the accompanying drawings, for clarity, the length, area, volume, gap dimensions, and relative dimensions of components, as well as the included angles and relative positional relationships between components, may be exaggerated. The same reference numerals denote the same elements throughout the drawings.

[0054] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0055] This embodiment provides a white light beam splitter, such as Figure 1 , Figure 2 As shown, it includes: housing 1, collimating lens 2, first focusing lens 3, and second focusing lens 4.

[0056] The outer shell 1 is hollow inside and has a first chamber 11, a second chamber 12 and a partition 13. The partition 13 is located between the first chamber 11 and the second chamber 12. The partition 13 has a first opening 131 and a second opening 132. The side wall of the outer shell 1 has a first receiving hole 111 and a second receiving hole 112. The first opening 131 and the second opening 132 allow light beams to pass through. Parallel light passing through the first opening 131 and the second opening 132 can form two split beams of light.

[0057] Collimating lens 2 is installed inside the second chamber 12; the focal length of collimating lens 2 is f1, and the effective aperture is d1. Collimating lens 2 is used to emit light emitted from the light source, producing a collimated parallel beam that is emitted towards the first opening 131 and the second opening 132. The white light source should be located at the focal point of collimating lens 2.

[0058] The first focusing lens 3 and the second focusing lens 4 are installed inside the first chamber 11. The incident beam axis of the first focusing lens 3 is coaxial with the axis of the first opening 131, and the focusing direction of the first focusing lens 3 is towards the first receiving aperture 111. The incident beam axis of the second focusing lens 4 is coaxial with the axis of the second opening 132, and the focusing direction of the second focusing lens 4 is towards the second receiving aperture 112. Therefore, the first focusing lens 3 and the second focusing lens 4 can focus the two split beams of light onto the first receiving aperture 111 and the second receiving aperture 112, respectively.

[0059] The first fiber coupling component 5 is connected to the first receiving aperture 111 to couple the first fiber to the first receiving aperture 111; the second fiber coupling component 6 is connected to the second receiving aperture 112 to couple the second fiber to the second receiving aperture 112. This enables multi-channel white light distribution and is adaptable to parallel operation scenarios of dual-optical-path optical detection and spectral acquisition at the back end.

[0060] The first focusing lens 3 has a focal length of f2 and an effective aperture of d2. The second focusing lens 4 has a focal length of f3 and an effective aperture of d3. f1=f2=f3, d2=d3, d1=2×d2. The aperture ratio ensures that the energy of the two beams is completely consistent, and the beam splitting balance meets the standard.

[0061] The off-axis direction of the second focusing lens 4 is offset from that of the first focusing lens 3, which can avoid crosstalk between the two focusing lenses.

[0062] The white light beam splitter of this embodiment can be placed in different directions of the spherical diverging light source to maximize the collection of light energy at the diverging solid angle of the light source, greatly reducing the energy loss of the spherical diverging light source. This white light beam splitter can solve the problems of low coupling efficiency and high energy loss in ultraviolet monochromators when using broadband white light input. The entire beam splitting and coupling process is completed entirely by reflective optical elements, eliminating chromatic aberration issues and providing no additional absorption in the ultraviolet band. It can simultaneously provide efficient, low-loss broadband light input for one or more ultraviolet monochromators.

[0063] The first receiving aperture 111 and the second receiving aperture 112 are multi-beam output ports, which can output one or more beams at will. The beam output form is not limited. It can be output through optical fiber coupling or through free space optical path direct transmission. It can be connected to analytical instruments that are sensitive to light flux, such as visible light monochromator, fiber optic spectrometer, and photomultiplier tube module, so that the white light beam splitter provided in this embodiment becomes a general-purpose low-loss white light multi-channel distribution device.

[0064] The white light beam splitter in this embodiment uses a collimating lens 2 to generate parallel light. A first opening 131 and a second opening 132 are provided on the partition 13 to perform pure geometric splitting of the parallel light. This eliminates the need for amplitude-splitting elements such as beam splitters, avoiding the inherent light energy loss caused by beam splitting, especially the severe energy attenuation in the ultraviolet band due to absorption and reduced transmittance of the beam splitting film. Since d2=d3 and d1=2×d2, the entire cross-section of the parallel beam is almost completely covered, and the two beams do not overlap or waste, thus achieving lossless splitting of a single beam geometrically.

[0065] f1=f2=f3, ensuring the matching of the numerical aperture of the optical path. The first focusing lens 3 and the second focusing lens 4, by setting their off-axis directions to be staggered, focus the parallel light they receive into two spatially separated focal points, which are then received by different receiving ends. This allows for the separate configuration of two independent focused white light beams, achieving dual-channel white light input.

[0066] In an alternative embodiment, such as Figure 1 , Figure 3 As shown, both the first optical fiber coupling assembly 5 and the second optical fiber coupling assembly 6 include: a connector 51, an optical fiber connector 52, a telescopic sleeve 53, and an adjustment frame 54.

[0067] The telescopic sleeve 53 is used to fix the outer shell 1; it serves as a reference mounting base for the first optical fiber coupling assembly 5 or the second optical fiber coupling assembly 6, ensuring that the reference position of the optical fiber docking optical path is fixed and avoiding optical path offset during disassembly and assembly.

[0068] The fiber optic connector 52 is used to fix the fiber optic cable and align the fiber end face with the first receiving hole 111 or the second receiving hole 112.

[0069] The adjustment bracket 54 is connected to the fiber optic connector 52, which can adjust the radial movement distance of the fiber optic connector 52;

[0070] Connecting seat 51 connects telescopic sleeve 53 and adjusting bracket 54;

[0071] The telescopic sleeve 53 can adjust the axial movement distance of the fiber optic connector 52 when it rotates.

[0072] By combining the telescopic sleeve 53 with the adjustment frame 54, three-dimensional adjustment of the spatial position can be achieved, ensuring that the focal point of the first focusing lens 3 and the second focusing lens 4 can be flexibly adjusted to the fiber end face, ensuring the coaxiality of the optical path connection, effectively reducing the optical loss of white light transmission, and improving the stability of multi-channel white light distribution.

[0073] In an alternative embodiment, such as Figure 3 As shown, the adjustment frame 54 includes a frame 541 and an adjustment column 542.

[0074] Frame 541 is fixed to connector 51;

[0075] The adjusting column 542 is movably connected to one side of the frame 541 in the X direction and the other side in the Y direction. The X direction is perpendicular to the Y direction. The fiber optic connector 52 is axially aligned in the Z direction, which is perpendicular to both the X and Y directions. One end of the adjusting column 542 abuts against the side wall of the fiber optic connector 52. The adjusting column 542 can move along the X or Y direction of the frame 541. This enables precise two-dimensional micro-adjustment of the fiber optic plane. In conjunction with the telescopic sleeve 53, it corrects fiber optic splicing deviations in all dimensions, adapting to high-precision optical path coupling conditions.

[0076] In an optional embodiment, the surfaces of the collimating lens 2, the first focusing lens 3, and the second focusing lens 4 are all coated with an aluminum film. The aluminum film has high reflectivity in the visible light band and also has high reflectivity in the ultraviolet band, which is suitable for full-band reflection and spectral splitting of white light, reducing the light energy absorption loss of the lens and improving the utilization rate of white light.

[0077] In an optional embodiment, the collimating mirror 2, the first focusing mirror 3, and the second focusing mirror 4 are all total internal reflection off-axis parabolic mirrors. The entire optical path uses total internal reflection off-axis parabolic mirrors, resulting in no chromatic aberration. The collimated beam has extremely high parallelism, and the focused spot is small and regularly shaped. This allows white light (including ultraviolet components) to be coupled into the narrow slit or small-core fiber of the monochromator with extremely high efficiency, significantly improving the system's light throughput and signal-to-noise ratio.

[0078] The off-axis parabolic mirror can be freely matched with different combinations according to the F-value of the optical system. The structure is simple and compact, and only three mirrors are needed to complete all functions from light source collimation to dual-path focusing output. It is easy to install and adjust, and the total internal reflection design itself is suitable for vacuum and high-power applications.

[0079] In an optional embodiment, f1 = d1. By limiting the focal length of collimating lens 2 to its own effective aperture and matching the standard optical path selection of the total internal reflection off-axis parabolic mirror, standard incident white light with uniform spot size and extremely high parallelism can be generated.

[0080] In an optional embodiment, f1=d1=50.8mm. 50.8mm and 25.4mm are standard lens specifications in the optical industry, offering strong versatility and facilitating component procurement and overall assembly calibration. According to F=f / d, the collimating lens in this embodiment has F=1, making it an F1.0 standard off-axis parabolic mirror. F=1 is a high-concentration collimating specification, capable of capturing a wide range of divergent light energy from xenon and deuterium lamps, improving the solid angle utilization of the light source, and reducing light energy loss at the source.

[0081] In an alternative embodiment, such as Figure 2 , Figure 4 As shown, a first mounting hole 14 and a second mounting hole 15 are provided on the side wall of the outer casing 1;

[0082] Both the first focusing lens 3 and the second focusing lens 4 include a lens mount 31 and a mirror surface 32. The mirror surface 32 is fixed on the lens mount 31, and the lens mount 31 can be installed in the first mounting hole 14 or the second mounting hole 15.

[0083] In this embodiment, the first focusing lens 3 and the second focusing lens 4 adopt a split lens structure, which facilitates the disassembly and replacement of the lens 32 and subsequent cleaning and maintenance. The mounting holes enable modular assembly of the lens mount 31, enhancing size compatibility.

[0084] In an alternative embodiment, such as Figure 4 As shown, both the first mounting hole 14 and the second mounting hole 15 are circular holes, and the mirror mount 31 can rotate within either the first mounting hole 14 or the second mounting hole 15. The circumferential rotation of the mirror mount 31 allows for fine-tuning of the off-axis angle of the mirror surface 32, accommodating different beam splitting angle adjustment requirements.

[0085] In an alternative embodiment, such as Figure 2 , Figure 4 As shown, the side wall of the outer casing 1 is also provided with several screw holes 16, which are arranged around the first mounting hole 14 and the second mounting hole 15. By screwing screws 17 into the screw holes 16, the screw heads of the screws 17 can fix the first focusing lens 3 and the lens mount 31 of the second focusing lens 4. The circular arrangement of screw holes 16 can evenly tighten the lens mount 31 at multiple points, ensuring balanced tightening force and locking the angle of the mirror surface 32 after adjustment, thus preventing optical path deviation caused by equipment vibration.

[0086] In an alternative embodiment, such as Figure 1 As shown, the axes of the first opening 131 and the second opening 132 are parallel and arranged vertically. In other embodiments, the axes of the first opening 131 and the second opening 132 can also be parallel and arranged horizontally or in a fan shape. The diameters of the first opening 131 and the second opening 132 can be equal or unequal, or a third opening can be provided to achieve three-way beam splitting, or even more-way beam splitting. Correspondingly, in addition to the first receiving hole 111 and the second receiving hole 112, a third receiving hole can also be provided.

[0087] In an optional embodiment, provided that the sum of the effective apertures is matched, the collimating mirror 2 can also be replaced by a combination of multiple reflecting mirrors to replace the large collimating mirror; the number, relative arrangement and off-axis direction of the focusing mirrors can be adjusted according to actual needs.

[0088] Based on the above-described preferred embodiments according to this application, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this application. The technical scope of this application is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A white light beam splitter, characterized in that, include: The outer shell (1) is hollow inside and has a first chamber (11), a second chamber (12) and a partition (13). The partition (13) is located between the first chamber (11) and the second chamber (12). The partition (13) has a first opening (131) and a second opening (132). The side wall of the outer shell (1) has a first receiving hole (111) and a second receiving hole (112). A collimating lens (2) is installed in the second chamber (12); the focal length of the collimating lens (2) is f1 and the effective aperture is d1. The first focusing lens (3) is installed in the first chamber (11). The incident beam axis of the first focusing lens (3) is coaxial with the axis of the first opening (131). The focusing direction of the first focusing lens (3) is towards the first receiving hole (111). The focal length of the first focusing lens (3) is f2 and the effective aperture is d2. The second focusing lens (4) is installed in the first chamber (11). The incident beam axis of the second focusing lens (4) is coaxial with the axis of the second opening (132). The focusing direction of the second focusing lens (4) is towards the second receiving hole (112). The focal length of the second focusing lens (4) is f3 and the effective aperture is d3. The off-axis direction of the second focusing lens (4) is offset from the off-axis direction of the first focusing lens (3), f1=f2=f3, d2=d3, d1=2×d2.

2. The white light beam splitter according to claim 1, characterized in that, The white light beam splitter also includes a first fiber optic coupling component (5) and a second fiber optic coupling component (6), wherein the first fiber optic coupling component (5) is connected to the first receiving port (111); and the second fiber optic coupling component (6) is connected to the second receiving port (112). Both the first fiber coupling component (5) and the second fiber coupling component (6) include: Telescopic sleeve (53) is used to fix it to the outer casing (1); Fiber optic connector (52) is used to fix the fiber and align the fiber end face with the first receiving hole (111) or the second receiving hole (112). The adjustment bracket (54) is connected to the optical fiber connector (52) and can adjust the radial movement distance of the optical fiber connector (52); Connecting seat (51) connects the telescopic sleeve (53) and the adjusting bracket (54). The telescopic sleeve (53) can adjust the axial movement distance of the optical fiber connector (52) when it rotates.

3. The white light beam splitter according to claim 2, characterized in that, The adjusting frame (54) includes: The frame (541) is fixed to the connecting seat (51); The adjusting column (542) is movably connected to one side of the frame (541) in the X direction and one side in the Y direction, wherein the X direction is perpendicular to the Y direction, and the optical fiber connector (52) is axially along the Z direction, wherein the Z direction is perpendicular to both the X direction and the Y direction; one end of the adjusting column (542) abuts against the side wall of the optical fiber connector (52), and the adjusting column (542) can move along the X direction or the Y direction of the frame (541).

4. The white light beam splitter according to claim 1, characterized in that, The surfaces of the collimating lens (2), the first focusing lens (3) and the second focusing lens (4) are all coated with an aluminum film.

5. The white light beam splitter according to any one of claims 1-4, characterized in that, The collimating mirror (2), the first focusing mirror (3) and the second focusing mirror (4) are all total reflection off-axis parabolic mirrors.

6. The white light beam splitter according to any one of claims 1-4, characterized in that, f1=d1.

7. The white light beam splitter according to claim 6, characterized in that, f1=d1=50.8mm.

8. The white light beam splitter according to any one of claims 1-4, characterized in that, The outer casing (1) has a first mounting hole (14) and a second mounting hole (15) on its side wall. Both the first focusing lens (3) and the second focusing lens (4) include a lens mount (31) and a mirror surface (32). The mirror surface (32) is fixed on the lens mount (31), and the lens mount (31) can be installed in the first mounting hole (14) or the second mounting hole (15).

9. The white light beam splitter according to claim 8, characterized in that, Both the first mounting hole (14) and the second mounting hole (15) are circular holes, and the mirror base (31) can rotate within the first mounting hole (14) or the second mounting hole (15).

10. The white light beam splitter according to claim 9, characterized in that, The outer casing (1) is also provided with a number of screw holes (16) on its side wall. The screw holes (16) are arranged around the first mounting hole (14) and the second mounting hole (15). By screwing the screw (17) into the screw holes (16), the screw head can fix the first focusing lens (3) and the lens mount (31) of the second focusing lens (4).

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