Projection lens additional lens group suitable for multiple scenes and fixing device thereof

Abstract

The application discloses a projection lens additional lens group suitable for multiple scenes and a fixing device thereof, and relates to the technical field of optical imaging lenses. The fixing device comprises a flange base and a fixing lens group. The fixing lens group is installed above the flange base. The fixing device further comprises an additional lens group. The additional lens group is arranged in the flange base. An optical element module for realizing focal length adjustment, aberration correction and projection range expansion is arranged in the additional lens group. The application breaks the original design idea of the lens and adopts a two-section grouping design scheme, i.e. the idea of combining the fixing lens group with multiple specifications of the additional lens group, so that the requirement of multiple scene applications is realized. The application expands the diversity of application scenes by adopting the additional lens group. The additional lens group can expand the field of view, focal length, brightness, picture width and other different functions, so that the multiple scene application optimization of the lens is realized at a low cost and simple assembly.

Description

Technical Field

[0001] This invention relates to the field of optical imaging lens technology, and more specifically to a projection lens attachment assembly and its fixing device applicable to multiple scenarios. Background Technology

[0002] Currently, projection displays are gradually being applied in various fields such as education, home, military, transportation, and office. The projection display market is vast, but the design cost of projection lenses is high, especially in the high-end projection lens market. One of the challenges is that the lens design must take into account multiple application scenarios.

[0003] Currently, most projection lens designs only consider specific, fixed scenarios, i.e., solutions specifically designed for a single application scenario, and have poor scalability. Summary of the Invention

[0004] The purpose of this invention is to provide a projection lens attachment assembly and its fixing device applicable to multiple scenarios, so as to solve the above-mentioned problems.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0006] A projection lens attachment and its fixing device applicable to multiple scenarios include a flange base and a fixed lens group. The fixed lens group is installed above the flange base and also includes an attachment lens group. The attachment lens group is disposed inside the flange base and is provided with an optical element module for realizing focus adjustment, aberration correction and projection range expansion functions.

[0007] As a preferred embodiment of the present invention, a focusing ring is installed on the top of the flange base, the focusing ring is fixed to the outer wall of the flange base by a threaded connection, and the fixed lens assembly is connected to the flange base by a pin.

[0008] As a preferred embodiment of the present invention, the inner wall of the flange base is provided with an annular positioning groove, and the fixed mirror assembly is radially positioned by engaging with the positioning groove.

[0009] As a preferred embodiment of the present invention, the outer wall of the focusing ring is provided with a precision scale ring.

[0010] A fixing device for fixing an additional lens assembly of a projection lens applicable to multiple scenarios, the fixing device is mounted on a flange base, and the fixing device adopts a ring bracket structure.

[0011] In a preferred embodiment of the present invention, the additional lens assembly is mounted on a fixing device, the fixing device being provided with a pin hole, and the additional lens assembly being fixed by a positioning pin engaging with the pin hole on the fixing device.

[0012] As a preferred embodiment of the present invention, a detection device for detecting the additional lens assembly is provided next to the fixing device. The detection device includes a position sensor for real-time monitoring of the installation position of the additional lens assembly, an optical sensor for real-time monitoring of the optical parameter matching degree of the additional lens assembly, and an image sensor for real-time monitoring of the working stability of the additional lens assembly.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. This invention breaks away from the original lens design concept and uses a two-stage group design scheme, namely a fixed lens group combined with multiple additional lens groups of various specifications, to meet the needs of multi-scenario applications.

[0015] 2. This invention expands the diversity of application scenarios by using an additional lens group. The additional lens group can expand other functions such as field of view, focal length, brightness and screen width, realizing multi-scenario application optimization of the lens with low cost and simple assembly. Attached Figure Description

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] Figure 1 A perspective view of a projection lens attachment assembly and its fixing device applicable to multiple scenarios provided by the present invention;

[0018] Figure 2 This invention provides a partial structural cross-sectional view of a projection lens attachment assembly and its fixing device applicable to multiple scenarios.

[0019] The labels in the diagram represent the following:

[0020] 1. Flange base; 2. Fixed lens assembly; 3. Additional lens assembly; 4. Focusing ring; 5. Detection device; 6. Annular positioning groove; 7. Fixing device; 8. Pin hole; 9. Positioning pin. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1-2 As shown, the present invention provides a projection lens attachment for multiple scenarios, including a flange base 1 and a fixed lens assembly 2. The fixed lens assembly 2 is installed above the flange base 1. The flange base 1 is provided with heat dissipation fins at the bottom to enhance heat dissipation efficiency and ensure long-term working stability. It also includes an attachment lens assembly 3, which is disposed inside the flange base 1. The attachment lens assembly 3 is provided with an optical element module for realizing focus adjustment, aberration correction and projection range expansion functions.

[0023] Specifically, a focusing ring 4 is installed on the top of the flange base 1. The outer surface of the focusing ring 4 is provided with anti-slip texture for easy manual adjustment. The focusing ring 4 is fixed to the outer wall of the flange base 1 by a threaded connection. The thread profile is sawtooth to enhance the self-locking performance and ensure that the optical back focus is adjustable. The fixed lens group 2 is connected to the flange base 1 by a pin. The pin is made of stainless steel and has been quenched to ensure connection strength and vibration resistance.

[0024] Specifically, the flange base 1 has an annular positioning groove 6 on its inner wall, and the fixed mirror assembly 2 achieves radial positioning by engaging with the positioning groove.

[0025] Specifically, the outer wall of the focusing ring 4 is provided with a precision scale ring, which, together with the micrometer head, achieves back focus adjustment accuracy.

[0026] A fixing device for fixing an additional lens assembly for projection lenses applicable to multiple scenarios is provided. The fixing device 7 is installed on a flange base 1. The fixing device 7 adopts a ring bracket structure. The inner wall of the ring bracket is provided with elastic buckles to achieve quick clamping of the additional lens assembly 3. A magnetic module can also be provided at the bottom of the ring bracket to magnetically adhere to the surface of the flange base 1 to ensure installation stability. At the same time, the surface of the ring bracket is coated with a wear-resistant coating to enhance scratch resistance and extend service life.

[0027] Specifically, the additional lens assembly 3 is mounted on the fixing device 7, and the fixing device 7 is provided with a pin hole 8. The additional lens assembly 3 is fixed by cooperating with the pin hole 8 on the fixing device 7 through a positioning pin 9. The additional lens assembly 3 can adopt a modular design, with a positioning pin 9 set on the edge of its lens, which cooperates with the pin hole 8 of the fixing device 7 to achieve precise alignment.

[0028] Specifically, a detection device 5 for detecting the additional lens assembly 3 is provided next to the fixing device 7. The detection device 5 includes a position sensor for real-time monitoring of the installation position of the additional lens assembly 3, an optical sensor for real-time monitoring of the optical parameter matching degree of the additional lens assembly 3, and an image sensor for real-time monitoring of the working stability of the additional lens assembly 3. The position sensor is used to detect the radial offset and axial displacement of the additional lens assembly 3; the optical sensor adopts a spectrophotometer module to monitor the spectral transmittance and uniformity of the additional lens assembly 3 in real time; the image sensor is connected to the main control system through a USB interface to realize the visual detection of the installation status of the additional lens assembly 3 and the function of automatic fault alarm.

[0029] The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A projection lens attachment assembly suitable for multiple scenarios, comprising a flange base (1) and a fixed lens assembly (2), wherein the fixed lens assembly (2) is mounted above the flange base (1), characterized in that, It also includes an additional lens assembly (3), which is disposed within the flange base (1). The additional lens assembly (3) contains an optical element module for realizing focal length adjustment, aberration correction and projection range expansion functions.

2. The projection lens attachment assembly applicable to multiple scenarios according to claim 1, characterized in that: A focusing ring (4) is installed on the top of the flange base (1). The focusing ring (4) is fixed to the outer wall of the flange base (1) by a threaded connection. The fixed lens assembly (2) is connected to the flange base (1) by a pin.

3. A projection lens attachment assembly applicable to multiple scenarios according to claim 2, characterized in that: The flange base (1) has an annular positioning groove (6) on its inner wall, and the fixed mirror assembly (2) is radially positioned by engaging with the positioning groove.

4. A projection lens attachment assembly applicable to multiple scenarios according to claim 2, characterized in that: The focusing ring (4) has a precision scale ring on its outer wall.

5. A fixing device for fixing a projection lens attachment assembly applicable to multiple scenarios as described in any one of claims 1-4, characterized in that: Includes a fixing device (7), which is mounted on the flange base (1) and adopts a ring bracket structure.

6. A fixing device according to claim 5, characterized in that: The additional lens assembly (3) is mounted on the fixing device (7), and the fixing device (7) is provided with a pin hole (8). The additional lens assembly (3) is fixed by the positioning pin (9) cooperating with the pin hole (8) on the fixing device (7).

7. A fixing device according to claim 5, characterized in that: A detection device (5) for detecting the additional lens assembly (3) is provided next to the fixing device (7). The detection device (5) includes a position sensor for real-time monitoring of the installation position of the additional lens assembly (3), an optical sensor for real-time monitoring of the optical parameter matching degree of the additional lens assembly (3), and an image sensor for real-time monitoring of the working stability of the additional lens assembly (3).

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