Relay lens with light combination effect

Abstract

The utility model discloses a relay lens with a light combination effect, which comprises a shell, at least three mutually intersected channels are arranged in the shell, one of the channels is an emitting channel, the other channels are incident channels, a lens assembly is arranged in each channel, a reflector assembly is arranged at the intersection of the plurality of channels, and the reflector assembly is arranged in the shell. A plurality of incident light beams of the reflector assembly are reflected to the emitting channel, the relay lens can combine and output a plurality of light beams with different wavelengths, compared with a traditional mode, the use of the relay lens in the optical system can be reduced, and on the premise that the imaging effect is not changed, the size of the whole optical system can be reduced, and meanwhile the cost can be saved.

Description

Technical Field

[0001] This utility model belongs to the field of optical lens technology, specifically a relay lens with light combining function. Background Technology

[0002] The relay lens in the optical system can adjust the refraction and focus of light to ensure that light is projected onto the screen evenly and clearly. By adjusting the lens's focal length and aperture, image contrast and sharpness can be improved, distortion and chromatic aberration can be reduced, thus providing a better visual experience.

[0003] If two beams of light of different wavelengths are needed to illuminate the DMD, the current method is to use two light rods for guidance, and two relay lenses are required before combining the beams, which makes the optical system very large. Utility Model Content

[0004] The purpose of this invention is to provide a relay lens with a light-combining function to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A relay lens with light-combining function includes a housing, wherein at least three intersecting channels are provided in the housing, one of which is an emission channel and the other channels are incident channels. Each of the channels is provided with a lens assembly, and a reflector assembly is provided at the intersection of the channels. The reflector assembly reflects several incident light beams to the emission channel.

[0007] In a further technical solution, the number of channels is three, arranged in a "T" shape, and the emission channel and one of the incident channels are distributed along the same axis, while the incident beam and the emission beam are not on the same central axis.

[0008] In a further technical solution, the housing is provided with slots at the intersection of several channels for inserting mirror assemblies.

[0009] In a further technical solution, the reflector assembly includes a bracket, which is used to fix the reflector and completely wraps the outer periphery of the reflector. A mounting part is provided at the end of the bracket, and the mounting part is connected to the housing.

[0010] In a further technical solution, the channel includes a front section, a middle section, and a rear section. The inner diameter of the front section is larger than that of the middle section, and the inner diameter of the middle section is larger than that of the rear section. The outer diameter of the lens assembly is adapted to the inner diameter of the middle section. The lens assembly is placed in the middle section and extends to the front section. A fixing ring is provided in the front section, and the fixing ring abuts against the lens assembly.

[0011] In a further technical solution, the lens assembly includes a second bracket, the end of which is provided with a limiting flange, and a second fixing ring, a first lens, a spacer and a second lens are arranged sequentially inside the second bracket. One side of the second lens abuts against the limiting flange, and one side of the first lens abuts against the second fixing ring.

[0012] The beneficial effects of this utility model are:

[0013] The relay lens of this invention can combine multiple beams of different wavelengths for output. Compared with the traditional method, it can reduce the use of relay lenses in the optical system. Under the premise of unchanged imaging effect, the size of the entire optical system can be reduced, and costs can be saved.

[0014] In addition, the mirror assembly is assembled and disassembled using a plug-in structure, which means that the mirror assembly can be replaced without disassembling the housing, greatly reducing the risk of dust entering the interior. Moreover, the plug-in design makes replacement very convenient.

[0015] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] Figure 1 : A three-dimensional structural diagram of this utility model.

[0017] Figure 2 : Disassembly diagram of the reflector assembly of this utility model.

[0018] Figure 3 : A structural diagram of the shell of this utility model.

[0019] Figure 4 : Overall three-dimensional cross-sectional view of this utility model.

[0020] Figure 5 : Structural diagram of the lens assembly of this utility model.

[0021] Reference numerals: 1-House, 2-Channel, 21-Front section, 22-Middle section, 23-Rear section, 24-Fixing ring one, 25-Incident channel, 26-Ejection channel, 3-Slot, 4-Lens assembly, 41-Bracket two, 42-Limiting flange, 43-Fixing ring two, 44-Lens one, 45-Spacer ring, 46-Lens two, 5-Reflector assembly, 51-Bracket one, 52-Reflector lens, 53-Mounting part. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Please refer to Figure 1-5 ;

[0024] The relay lens of this utility model has a light combining function, which can combine at least two light beams together and emit them. Specifically, it includes a housing 1, which has at least three intersecting channels, one of which is an emission channel 26 and the other channels are incident channels 25. Each channel is provided with a lens assembly 4, and a reflector assembly 5 is provided at the intersection of several channels. In this embodiment, the angle of all incident channels 25 is not limited, and the reflector assembly 5 can be composed of one or more reflective mirrors 52. The reflector assembly 5 reflects several incident light beams to the emission channel 26.

[0025] In use, light beams of different wavelengths enter from the incident channel 25 and are focused and adjusted by the lens assembly 4. Then, several light beams reach the reflector assembly 5, which changes the optical path of the light beams so that they are directed toward the exit channel 26. Finally, the light beams are refocused and adjusted by the lens assembly 4 in the exit channel 26 before being emitted. Since the wavelengths of the light beams are different, they do not affect each other and do not change the size of the light spot.

[0026] The relay lens described in this invention can combine multiple beams of different wavelengths for output. Compared with traditional methods, it can reduce the use of relay lenses in the optical system. Under the premise of unchanged imaging effect, the size of the entire optical system can be reduced, and costs can be saved.

[0027] In this embodiment of the utility model, there are three channels arranged in a "T" shape. The emission channel 26 and one of the incident channels 25 are distributed along the same axis. The incident beam and the emission beam are not on the same central axis. It should be noted that the emission channel 26 and one of the incident channels 25 can be coaxially arranged, but the direction of incidence is not on the axis. This design can compensate for the optical path difference.

[0028] Based on this embodiment, there are two incident beams, which are distributed at 90°. Therefore, only one reflector 52 with a 45° angle needs to be set in the reflector assembly 5. The beam that is axially aligned with the emission channel 26 can pass through the reflector 52. The other incident channel 25 is at a 45° angle to the emission channel 26. When its beam hits the reflector 52, it will be reflected and the light path will be changed to the emission channel 26. It should be noted that one side of the reflector 52 will be coated to improve the reflectivity.

[0029] Over time, the surface coating of the reflector 52 will oxidize and affect the emission effect. Therefore, the reflector 52 needs to be maintained regularly. Since the reflector 52 is located inside, the housing 1 needs to be made into a split structure in the traditional way. When maintenance is required, the housing 1 needs to be disassembled as a whole, which is not only troublesome to operate, but also allows dust to enter the cavity, which has the risk of affecting the imaging effect.

[0030] To avoid the above problems, the housing 1 is provided with slots 3 at the intersection of several channels for inserting the reflector assembly 5. In other words, the reflector assembly 5 can be replaced without disassembling the housing 1, which greatly reduces the risk of dust entering the interior. Moreover, the plug-in design makes replacement very convenient.

[0031] Furthermore, the reflector assembly 5 includes a bracket 51, which fixes the reflector lens 52 and completely encloses the outer periphery of the reflector lens 52 to prevent the edge of the reflector lens 52 from being bumped during disassembly and assembly. A mounting part 53 is provided at the end of the bracket 51, which is connected to the housing 1. The diameter of the insertion slot is exactly the same as the size of the bracket 51. During installation, the bracket 51 is completely inserted into the housing 1, while the mounting part 53 is located on the outside of the housing 1 and can be fixed with screws. At the same time, the mounting part 53 can also act as a handle, which can be held during disassembly and installation without contaminating the bracket and the reflector lens 52. Then, by fixing the mounting part 53 to the housing 1, it will not affect the inner cavity, and disassembly and assembly are also convenient. Based on this solution, the housing 1 can be integrally molded, which is more conducive to production and processing.

[0032] In this embodiment of the present invention, the entrance channel 25 and the exit channel 26 have the same structure, including a front section 21, a middle section 22 and a rear section 23. The inner diameter of the front section 21 is larger than the inner diameter of the middle section 22, and the inner diameter of the middle section 22 is larger than the rear section 23. The outer diameter of the lens assembly 4 is adapted to the inner diameter of the middle section 22. The lens assembly 4 is placed in the middle section 22 and extends to the front section 21. The lens assembly 4 is a whole. When installation is required, since the inner diameter of the front section 21 is larger than the inner diameter of the middle section 22, the lens assembly 4 can directly pass through the front section 21 and enter the middle section 22 until the end of the lens assembly 4 abuts against the rear section 23 and stops sliding. At the same time, the middle section 22 limits the lens assembly 4 to prevent it from shifting. Finally, a fixing ring 24 is used to abut against the lens assembly 4 to fix it. The fixing ring 24 can be connected to the housing 1 with screws.

[0033] It is also very convenient when replacement is needed. After removing the retaining ring 24, the lens assembly 4 can be pulled out directly, which can also reduce the risk of dust entering the inner cavity of the housing 1.

[0034] Furthermore, the lens assembly 4 includes a second bracket 41, with a limiting flange 42 at its end. Inside the second bracket 41, a second fixing ring 43, a first lens 44, a spacer 45, and a second lens 46 are arranged in sequence. One side of the second lens 46 abuts against the limiting flange 42, and one side of the first lens 44 abuts against the second fixing ring 43. This method is similar to the way the lens assembly 4 is fixed in the channel. It can not only protect the edges of the first lens 44 and the second lens 46, but also eliminate the need for precise alignment when the lens needs to be replaced, as the internal structure of the second bracket 41 has already defined the position of the first lens 44 and the second lens 46.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A relay lens having a light combining action, characterized by: The application relates to a light-emitting device, which comprises a shell (1) provided with at least three intersecting channels, one of which is an emitting channel (26) and the rest are incident channels (25), each of the channels is provided with a lens assembly (4), and a mirror assembly (5) is arranged at the intersection of the channels, and the mirror assembly (5) reflects the incident light beams to the emitting channel (26).

2. A relay lens having a light combining action according to claim 1, characterized in that: The number of the channels is three, and the channels are distributed in a T shape, the emitting channel (26) and one of the incident channels (25) are distributed along the same axis, and the incident light beams and the emitting light beams are not along the same central axis.

3. A relay lens having a combining action according to claim 1 or 2, characterized in that: The shell (1) is provided with a slot (3) at the intersection of the channels, which is used for inserting the mirror assembly (5).

4. A relay lens having a combining action according to claim 3, characterized in that: The mirror assembly (5) comprises a support (51), the support (51) is used for fixing a mirror piece (52), and the support (51) completely wraps the periphery of the mirror piece (52), an installation part (53) is arranged at the end of the support (51), and the installation part (53) is connected with the shell (1).

5. A relay lens having a combining action according to claim 1, characterized by: The channel comprises a front section (21), a middle section (22) and a rear section (23), the inner diameter of the front section (21) is larger than that of the middle section (22), the inner diameter of the middle section (22) is larger than that of the rear section (23), the outer diameter of the lens assembly (4) is adapted to the inner diameter of the middle section (22), the lens assembly (4) is arranged in the middle section (22) and extends to the front section (21), a fixing ring (24) is arranged in the front section (21), and the fixing ring (24) abuts against the lens assembly (4).

6. A relay lens with light combining according to claim 5, characterized in that: The lens assembly (4) comprises a support (41), the end of the support (41) is provided with a limiting flange (42), a fixing ring (43), a lens (44), a spacer ring (45) and a lens (46) are sequentially arranged in the support (41), one side of the lens (46) abuts against the limiting flange (42), and one side of the lens (44) abuts against the fixing ring (43).

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