Optical lens structure and optical device

Abstract

This application provides an optical lens structure and an optical device. The optical lens structure includes an objective lens assembly, an image-switching lens assembly, and an eyepiece assembly arranged sequentially from the object side to the image side along the main optical path. It also includes a conversion device and an image-enhancing optical element connected to the conversion device. The conversion device is used to switch the image-enhancing optical element to the main optical path between the objective lens assembly and the image-switching lens assembly when the optical lens structure is in a low-light environment, thereby achieving image enhancement in low-light environments to form a clear image for human observation. Furthermore, in visible light environments, the image-enhancing optical element can be switched out of the main optical path to avoid overexposure and affecting imaging effects if the image-enhancing optical element is in the optical path. This allows the optical lens structure to be used in both low-light and visible light environments without the need for two sets of lenses for different environments, thus simplifying the structure, reducing cost and weight, and improving portability.

Description

Technical Field

[0001] This application relates to the field of optical imaging technology, and in particular to an optical lens structure and an optical device. Background Technology

[0002] Optical devices, such as observation glasses, are used for observing target scenes from a distance. Specifically, an optical lens structure includes an objective lens, a conversion lens, and an eyepiece. The objective lens is configured to perform primary imaging of the target scene to form an intermediate image. The conversion lens is located on the image side of the objective lens and is configured to rotate the intermediate image so that the inverted image becomes an upright image. The eyepiece is located on the image side of the conversion lens and is configured to magnify and observe the converted upright image.

[0003] However, to meet the observation needs of low-light environments at night and visible light environments during the day, current optical lens structures require two sets of lenses to be configured for different environments, resulting in complex structures, high costs, and heavy weights that make them inconvenient to carry. Summary of the Invention

[0004] The purpose of this application is to provide an optical lens structure and optical device, which aims to solve the problems of complex structure and high cost caused by two sets of lenses being used in different environments.

[0005] In a first aspect, embodiments of this application provide an optical lens structure, including an objective lens assembly, an image-spinning lens assembly, and an eyepiece assembly arranged sequentially from the object side to the image side along the main optical path; The optical lens structure also includes a conversion device and an image enhancement optical element connected to the conversion device. The conversion device is used to switch the image enhancement optical element to the main optical path between the objective lens assembly and the image inversion lens assembly when the optical lens structure is in a low-light environment, and can switch the image enhancement optical element to outside the main optical path when the optical lens structure is in a visible light environment.

[0006] In some embodiments, the conversion device includes a rotating mechanism and a carrier connected to the rotating mechanism. The image intensifying optical element is disposed on the carrier. The rotating mechanism can rotate under the action of an external force to rotate the carrier and link the image intensifying optical element to switch to different positions.

[0007] In some embodiments, the rotating mechanism includes an intermediate shaft assembly and a toggle member passing through one end of the intermediate shaft assembly, and the carrier is provided with a mounting hole through which the other end of the toggle member passes. And / or, the carrier includes a circular carrier body and a connecting body disposed on one side of the carrier body, the carrier body is provided with a mounting port for mounting the image enhancement optical element, and the connecting body is connected to the rotating mechanism.

[0008] In some embodiments, the objective lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side along the main optical path; The first lens has positive refractive power, and the object side of the first lens is convex, while the image side is concave. The second lens has positive refractive power, and the object side and the image side of the second lens are both convex. The third lens has negative refractive power, and the object side and image side of the third lens are concave. The fourth lens has negative refractive power, and the object side and image side of the fourth lens are concave. The fifth lens has positive refractive power, and the object side and the image side of the fifth lens are both convex. The sixth lens has positive refractive power, and the object side of the sixth lens is convex, while the image side is concave.

[0009] In some embodiments, the optical lens structure satisfies: The optical lens structure satisfies: 0.007≤|Φ1|≤0.008, 0.01≤|Φ2|≤0.02, 0.01≤|Φ3|≤0.02, 0.02≤|Φ4|≤0.03, 0.03≤|Φ5|≤0.04, 0.009≤|Φ6|≤0.01; where |Φ1| is the absolute value of the optical power of the first lens, |Φ2| is the absolute value of the optical power of the second lens, |Φ3| is the absolute value of the optical power of the third lens, |Φ4| is the absolute value of the optical power of the fourth lens, |Φ5| is the absolute value of the optical power of the fifth lens, and |Φ6| is the absolute value of the optical power of the sixth lens; And / or, 69mm≤D1≤70mm, 37mm≤D2≤38mm, 37mm≤D3≤38mm, 25mm≤D4≤26mm, 27mm≤D5≤28mm, 23mm≤D6≤24mm; wherein, D1 is the aperture of the first lens, D2 is the aperture of the second lens, D3 is the aperture of the third lens, D4 is the aperture of the fourth lens, D5 is the aperture of the fifth lens, and D6 is the aperture of the sixth lens; And / or, 9mm≤d1≤10mm, 10mm≤d2≤11mm, 5mm≤d3≤6mm, 2mm≤d4≤3mm, 4mm≤d5≤5mm, 8mm≤d6≤9mm; wherein, d1 is the center thickness of the first lens, d2 is the center thickness of the second lens, d3 is the center thickness of the third lens, d4 is the center thickness of the fourth lens, d5 is the center thickness of the fifth lens, and d6 is the center thickness of the sixth lens.

[0010] In some embodiments, the eyepiece assembly includes a seventh lens, an eighth lens, and a ninth lens arranged sequentially from the object side to the image side along the main optical path; The object-side surface of the seventh lens is convex, and the image-side surface is concave. The object-side surface of the eighth lens is convex, and the image-side surface is also convex. The object-side surface of the ninth lens is convex, and the image-side surface is concave.

[0011] In some embodiments, the optical lens structure satisfies: 0.02≤|Φ7|≤0.03, 0.03≤|Φ8|≤0.04, 0.01≤|Φ9|≤0.02; where, |Φ7| is the absolute value of the optical power of the seventh lens, |Φ8| is the absolute value of the optical power of the eighth lens, and |Φ9| is the absolute value of the optical power of the ninth lens; And / or, 26mm≤D7≤27mm, 28mm≤D8≤29mm, 28mm≤D9≤29mm; wherein, D7 is the aperture of the seventh lens, D8 is the aperture of the eighth lens, and D9 is the aperture of the ninth lens; And / or, 9mm≤d7≤10mm, 10mm≤d8≤11mm, 5mm≤d9≤6mm; wherein, d7 is the center thickness of the seventh lens, d8 is the center thickness of the eighth lens, and d9 is the center thickness of the ninth lens.

[0012] In some embodiments, the optical lens structure further includes an OLED display element and a beam combining optical element, the beam combining optical element being located on the main optical path and between the objective lens assembly and the image-rotating lens assembly; the OLED being located on one side of the beam combining optical element and outside the main optical path; The absolute power of the beam combining optical element is zero; and / or, 11mm ≤ D 合光 ≤12mm, D 合光 Where d is the aperture of the beam combining optical element; and / or, 12mm ≤ d 合光 ≤13mm, d 合光 The center thickness of the beam combining optical element.

[0013] In some embodiments, the image-switching lens assembly includes a tenth lens, an eleventh lens, a twelfth lens, and a thirteenth lens arranged sequentially from the object side to the image side along the main optical path; The object side of the tenth lens is convex, and the image side is convex. The object-side surface of the eleventh lens is convex, and the image-side surface is also convex. The object side of the twelfth lens is concave, and the image side is also concave. The object-side surface of the thirteenth lens is concave, and the image-side surface is convex.

[0014] In some embodiments, the optical lens structure satisfies: 0.07≤|Φ 10 |≤0.08, 0.28≤|Φ 11 |≤0.29, 0.12≤|Φ 12 |≤0.13, 0.06≤|Φ 13 |≤0.07; where |Φ 10 | represents the absolute value of the optical power of the tenth lens, |Φ 11 | represents the absolute value of the optical power of the eleventh lens, |Φ 12 | represents the absolute value of the optical power of the twelfth lens, |Φ 13 | represents the absolute value of the optical power of the thirteenth lens; And / or, 10mm≤D 10 ≤11mm, 10mm≤D 11 ≤11mm, 10mm≤D 12 ≤11mm, 12mm≤D 13 ≤13mm; where D 10 D is the aperture of the tenth lens. 11 D is the aperture of the eleventh lens. 12 D is the aperture of the twelfth lens. 13 The aperture of the thirteenth lens; And / or, 1mm≤d 10 ≤2mm, 3mm≤d 11 ≤4mm, 1mm≤d 12 ≤2mm, 4mm≤d 13 ≤5mm; where d 10 d is the center thickness of the tenth lens. 11 d is the center thickness of the eleventh lens. 12 d is the center thickness of the twelfth lens. 13 The center thickness of the thirteenth lens.

[0015] In some embodiments, the angle between the outgoing light rays of the objective lens assembly and the normal of the image intensifying optical element is no greater than 4.1°; And / or, the range of the low-light wavelength of the optical lens structure is 480nm-900nm; And / or, the visible light band of the optical lens structure is in the range of 486nm-656nm; And / or, the magnification of the optical lens structure is not less than 4; And / or, the objective lens assembly has a full field of view range of 10°-11°; And / or, the relative aperture of the objective lens assembly is not less than 1 / 1.2; And / or, the entrance pupil distance of the eyepiece assembly is not less than 30mm.

[0016] Secondly, embodiments of this application also provide an optical device, including a housing and the aforementioned optical lens structure, wherein the objective lens assembly, the image-rotating lens assembly, and the eyepiece assembly are all disposed within the housing.

[0017] The beneficial effects of this invention are: This application provides an optical lens structure and an optical device. The optical lens structure includes an objective lens assembly, an image-spinning lens assembly, and an eyepiece assembly arranged sequentially from the object side to the image side along the main optical path. The objective lens assembly is configured to perform primary imaging of a target scene to form an intermediate image; the image-spinning lens assembly is located on the image side of the objective lens assembly and is configured to spin the intermediate image so that the inverted image is converted into an upright image; the eyepiece assembly is located on the image side of the image-spinning lens assembly and is configured to magnify and observe the converted upright image for human visual observation.

[0018] Furthermore, the optical lens structure of this embodiment also includes a conversion device and an image-enhancing optical element connected to the conversion device. The conversion device is used to switch the image-enhancing optical element to the main optical path between the objective lens assembly and the image-transfer lens assembly when the optical lens structure is in a low-light environment, thereby achieving image enhancement in low-light environments to form a clear image for human observation. It can also switch the image-enhancing optical element outside the main optical path when the optical lens structure is in a visible light environment, avoiding overexposure and affecting imaging effects if the image-enhancing optical element is in the optical path. In other words, the optical lens structure of this embodiment, by setting a conversion device to move and switch the image-enhancing optical element in the main optical path, makes the optical lens structure applicable to both low-light and visible light environments, without requiring two sets of lenses for different environments. Therefore, it simplifies the structure, reduces costs, and improves portability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the optical lens structure shown in this application under low-light conditions. Figure 2 This is a schematic diagram of the optical lens structure shown in this application under visible light conditions. Figure 3 This is a system point diagram of the objective lens assembly of the optical lens structure shown in this application in a low-light environment; Figure 4 This is a system MTF diagram of the objective lens assembly of the optical lens structure shown in this application in a low-light environment; Figure 5 The image shows the distortion and field curvature of the objective lens assembly of the optical lens structure shown in this application in a low-light environment. Figure 6 This is a system dot diagram of the objective lens assembly of the optical lens structure shown in this application in a visible light environment; Figure 7 This is a system MTF diagram of the objective lens assembly of the optical lens structure shown in this application in a visible light environment; Figure 8 The image shows the distortion and field curvature of the objective lens assembly of the optical lens structure shown in this application in a visible light environment. Figure 9 This is a system point diagram of the combination of the image-transfer lens assembly and the eyepiece assembly shown in this application; Figure 10 This is a system MTF diagram of the combination of the image-transfer lens assembly and the eyepiece assembly shown in this application; Figure 11 The image inversion lens assembly and eyepiece assembly shown in this application are distortion and field curvature diagrams. Figure 12 This is a schematic diagram of the structure of the optical device shown in this application, wherein the image enhancement optical element is located in the main optical path; Figure 13 This is a schematic diagram of the structure of the optical device shown in this application, wherein the image enhancement optical element is located outside the main optical path.

[0021] Figure label: 100. Objective lens assembly; 110. First lens; 120. Second lens; 130. Third lens; 140. Fourth lens; 150. Fifth lens; 160. Sixth lens; 200. Image-switching lens assembly; 210. Tenth lens; 220. Eleventh lens; 230. Twelfth lens; 240. Thirteenth lens; 300. Eyepiece assembly; 310. Seventh lens; 320. Eighth lens; 330. Ninth lens; 400. Conversion device; 410. Rotation mechanism; 411. Intermediate shaft assembly; 412. Actuator; 420. Carrier; 421. Carrier body; 422. Connecting body; 500. Image-enhancing optical element; 600. OLED display element; 700. Beam-combining optical element; 800. Housing. Detailed Implementation

[0022] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" 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, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0023] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0024] Reference Figure 1 and Figure 2 , Figures 12 to 13 As shown, this embodiment provides an optical lens structure, including an objective lens assembly 100, an image-rotating lens assembly 200, and an eyepiece assembly 300 arranged sequentially from the object side to the image side along the main optical path.

[0025] The optical lens structure also includes a conversion device 400 and an image intensifying optical element 500 connected to the conversion device 400. The conversion device 400 is used to switch the image intensifying optical element 500 to the main optical path between the objective lens assembly 100 and the image intensifying lens assembly 200 when the optical lens structure is in a low-light environment, and can switch the image intensifying optical element 500 to outside the main optical path when the optical lens structure is in a visible light environment.

[0026] In practical implementation, the object-to-image path of the main optical path can be referenced. Figure 1 In the x-direction, the objective lens assembly 100 is located on the object side of the image-rotating lens assembly 200, used for primary imaging of the target scene to form an intermediate image. The image-rotating lens assembly 200 is located on the image side of the objective lens assembly 100, used to rotate the inverted image of the intermediate image to form an upright image that is easy for the naked eye to observe, i.e., rotating the intermediate image 180°. The eyepiece assembly 300 is located on the image side of the image-rotating lens assembly 200, used to magnify the converted upright image for observation by the naked eye. That is, the objective lens assembly 100, the image-rotating lens assembly 200, and the eyepiece assembly 300 in this embodiment together constitute a complete optical lens structure, which can be used as an observation lens such as a display mirror or a telescope.

[0027] Furthermore, the optical lens structure of this embodiment also includes a conversion device 400 and an image enhancement optical element 500. Referring to... Figure 1 As shown, in low-light environments (i.e., low-brightness environments at night), the conversion device 400 transfers the image intensifying optical element 500 to the main optical path between the objective lens assembly 100 and the image-transfer lens assembly 200 to enhance the intermediate image formed by the objective lens assembly 100, ensuring the enhanced image has sufficient sharpness for human visual observation. Specifically, the image intensifying optical element 500 can enhance the weak intermediate image by 10... 3 -10 5 Times. (Refer to...) Figure 2 As shown, in visible light environments (i.e., in bright daylight environments), the conversion device 400 switches the image intensifying optical element 500 outside the main optical path, that is, switches it between the objective lens assembly 100 and the image inverting lens assembly 200, thereby avoiding the problem that the image intensifying optical element 500 would cause overexposure and affect the imaging effect if it were in the main optical path.

[0028] In other words, the optical lens structure of this embodiment, by setting the same set of objective lens assembly 100, image-inverting lens assembly 200 and eyepiece assembly 300 for use in different environments, only requires setting the image intensifying optical element 500 to be in different positions in different environments to achieve use in different environments. Therefore, compared with the related technology that requires two sets of lenses to be suitable for different environments, the optical lens structure of this embodiment can significantly simplify the structure, reduce costs and weight, thereby reducing the carrying load of the user and the volume of the carried optical lens structure.

[0029] For example, the image enhancement optical element 500 may be a low-light detector or a low-light intensifier.

[0030] As described above, the optical lens structure of this embodiment, by incorporating a switching device 400, switches the image-enhancing optical element 500 to the main optical path between the objective lens assembly 100 and the image-transfer lens assembly 200 when the optical lens structure is in a low-light environment. This enables image enhancement in low-light environments to form a clear image for human observation. Furthermore, when the optical lens structure is in a visible light environment, the image-enhancing optical element 500 can be switched out of the main optical path to avoid overexposure and affecting imaging performance if it were present in the optical path. In other words, the optical lens structure of this embodiment, by incorporating the switching device 400 to move and switch the image-enhancing optical element 500, allows the optical lens structure to be used in both low-light and visible light environments without requiring two sets of lenses for different environments. This simplifies the structure, reduces cost and weight, and improves portability.

[0031] Reference Figure 1 , Figure 2 , Figure 12 and Figure 13 As shown, in some embodiments, the conversion device 400 includes a rotating mechanism 410 and a carrier 420 connected to the rotating mechanism 410. The image intensifying optical element 500 is disposed on the carrier 420. The rotating mechanism 410 can rotate under the action of an external force, so that the carrier 420 rotates and the image intensifying optical element 500 is switched to different positions, so that it can be used in visible light environment or low light environment.

[0032] For example, the rotating mechanism 410 can be operated manually or automatically by using a rotary motor to save manpower.

[0033] Reference Figure 1 , Figure 2 , Figure 12 and Figure 13 As shown, in some embodiments, the rotating mechanism 410 includes an intermediate shaft assembly 411 and a toggle member 412 passing through one end of the intermediate shaft assembly 411. The carrier member 420 is provided with a mounting hole through which the other end of the toggle member 412 can pass, so that when the toggle member 412 is driven to rotate in a preset direction by manual operation or a rotary motor, the carrier member 420 can be rotated, thereby driving the image intensifying optical element 500 to rotate to switch its position.

[0034] For example, when the toggle switch 412 is turned clockwise, the image intensifying optical element 500, which is outside the main optical path, can be rotated onto the main optical path, that is, from... Figure 13 Switch to the position shown. Figure 12 The position shown. For example, when the toggle switch 412 is turned counterclockwise, the image intensifying optical element 500, which is located in the main optical path, can be rotated to outside the main optical path, that is, from... Figure 12 Switch to the position shown. Figure 13 The location shown.

[0035] For example, the toggle element 412 can be, for instance, as follows: Figure 12 The lever shown may also be a toggle knob. The intermediate shaft assembly 411 may include a single intermediate shaft or a connecting sleeve or other structure disposed on the intermediate shaft that rotatably engages with the toggle member 412.

[0036] Furthermore, the carrier 420 includes a circular carrier body 421 and a connecting body 422 disposed on one side of the carrier body 421. The carrier body 421 is provided with a mounting port for mounting the image intensifying optical element 500, and the connecting body 421 is connected to the rotating mechanism 410.

[0037] In practice, the image intensifying optical element 500 is usually circular. Therefore, a circular support body 421 is provided, and a mounting port that matches the outer contour of the image intensifying optical element 500 is provided on it to install the image intensifying optical element 500. This makes it easier to control the eccentricity error between the two.

[0038] Furthermore, to facilitate the connection between the carrier 420 and the rotating mechanism 410 without interfering with the image intensifying optical element 500, a connecting body 422 can be provided on one side of the carrier body 421, and mounting holes can be provided on the connecting body 422. The connecting body 422 can be shaped by two beveled sides and a curved side, allowing the entire carrier 420 to be in the shape of... Figure 12 The teardrop shape shown can be customized according to actual needs; this embodiment does not impose any specific limitations on this.

[0039] Reference Figure 1 and Figure 2 As shown, in some embodiments, the objective lens assembly 100 includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160 arranged sequentially from the object side to the image side along the main optical path.

[0040] The first lens 110 has positive refractive power, and its object-side surface is convex while its image-side surface is concave. The second lens 120 has positive refractive power, and both its object-side and image-side surfaces are convex. The third lens 130 has negative refractive power, and both its object-side and image-side surfaces are concave. The fourth lens 140 has negative refractive power, and both its object-side and image-side surfaces are concave. The fifth lens 150 has positive refractive power, and both its object-side and image-side surfaces are convex. The sixth lens 160 has positive refractive power, and both its object-side and image-side surfaces are convex.

[0041] In practical implementation, the objective lens assembly 100 with this structural form can eliminate both axial and magnification chromatic aberration across a wide spectrum, and effectively correct the maximum coma in the off-axis field of view, significantly improving the resolution of the optical lens structure. Simultaneously, each lens can be configured with a spherical surface, thereby effectively correcting off-axis aberrations in the optical lens structure. This not only simplifies the optical path structure of the entire optical lens structure but also improves the imaging quality of the optical lens structure in low-light and visible light environments. Furthermore, the rational structure of the objective lens assembly 100 ensures the miniaturization and lightweight design of the optical lens structure.

[0042] Specifically, the first lens 110 and the second lens 120 can be made of heavy barium flint glass, the third lens 130 can be made of heavy flint glass, the fourth lens 140 can be made of flint glass, and the fifth lens 150 and the sixth lens 160 can be made of heavy lanthanum flint glass. The second lens 120 and the third lens 130 can form a cemented lens, and through the appropriate combination of corresponding optical materials, good correction of positional chromatic aberration and magnification chromatic aberration can be ensured.

[0043] In some embodiments, the optical lens structure satisfies: 0.007≤|Φ1|≤0.008, 0.01≤|Φ2|≤0.02, 0.01≤|Φ3|≤0.02, 0.02≤|Φ4|≤0.03, 0.03≤|Φ5|≤0.04, 0.009≤|Φ6|≤0.01; where |Φ1| is the absolute value of the optical power of the first lens, |Φ2| is the absolute value of the optical power of the second lens, |Φ3| is the absolute value of the optical power of the third lens, |Φ4| is the absolute value of the optical power of the fourth lens, |Φ5| is the absolute value of the optical power of the fifth lens, and |Φ6| is the absolute value of the optical power of the sixth lens.

[0044] Generally, a larger absolute value of optical power results in stronger deflection and a more compact optical path, but also larger aberrations, stricter tolerances, and more difficult manufacturing. Conversely, a smaller absolute value of optical power results in smaller aberrations, looser tolerances, and easier manufacturing, but also a longer optical path, a larger system, and weaker correction. Therefore, by appropriately setting the absolute values ​​of the optical power of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, and the sixth lens 160, it is possible to effectively balance issues such as optical path length and aberration magnitude.

[0045] In this embodiment, the absolute values ​​of the optical power of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, and the sixth lens 160 follow a pattern of "low-medium-medium-high-high-low", thereby enabling specific aberration balance and performance optimization to be achieved by precisely controlling the optical power of each lens.

[0046] Specifically, the first lens 110 has a relatively weak optical power, thus acting as a buffer layer to prevent strong optical power from directly impacting the image-side lenses. The second lens 120 has a relatively strong optical power, ensuring moderate spherical aberration at medium optical power for easier subsequent correction. The third lens 130 has a relatively strong optical power, preventing excessive divergence of the optical path. The fourth lens 140 has a very strong optical power, generating sufficient positive spherical aberration to counteract the negative spherical aberration of the object-side lenses, such as the second lens 120. The fifth lens 150 has the strongest optical power, used for rapidly converging diverging beams. The sixth lens 160 has a relatively weak optical power, enabling fine-tuning of aberrations.

[0047] For example, the absolute optical power value |Φ1| of the first lens 110 can be 0.007, 0.0075, or 0.008. The absolute optical power value |Φ2| of the second lens 120 can be 0.01, 0.015, or 0.02. The absolute optical power value |Φ3| of the third lens 130 can be 0.01, 0.015, or 0.02. The absolute optical power value |Φ4| of the fourth lens 140 can be 0.02, 0.025, or 0.03. The absolute optical power value |Φ5| of the fifth lens 150 can be 0.03, 0.035, or 0.04. The absolute optical power value |Φ6| of the sixth lens 160 can be 0.009, 0.0095, or 0.01.

[0048] In some embodiments, the optical lens structure satisfies the following: 69mm≤D1≤70mm, 37mm≤D2≤38mm, 37mm≤D3≤38mm, 25mm≤D4≤26mm, 27mm≤D5≤28mm, 23mm≤D6≤24mm; wherein, D1 is the aperture of the first lens 110, D2 is the aperture of the second lens 120, D3 is the aperture of the third lens 130, D4 is the aperture of the fourth lens 140, D5 is the aperture of the fifth lens 150, and D6 is the aperture of the sixth lens 160.

[0049] Generally, a larger aperture value results in stronger light collection and higher resolution, but also leads to poor pixel quality and an excessively bulky optical lens structure. Conversely, a smaller aperture value results in better pixel quality and a lighter size, but also leads to more vignetting, lower resolution, and weaker light transmission. Therefore, in this embodiment, by rationally setting the aperture values ​​of the first lens 110, second lens 120, third lens 130, fourth lens 140, fifth lens 150, and sixth lens 160, not only can the issues of pixel count and size be balanced, but also synergistic optimization can be achieved with the absolute value allocation of the optical power of the first lens 110, second lens 120, third lens 130, fourth lens 140, fifth lens 150, and sixth lens 160, achieving a balanced design between beam constraint and the compactness of the optical lens structure.

[0050] For example, the aperture D1 of the first lens 110 can be 69mm, 69.5mm, or 70mm. The aperture D2 of the second lens 120 can be 37mm, 37.5mm, or 38mm. The aperture D3 of the third lens 130 can be 37mm, 37.5mm, or 38mm. The aperture D4 of the fourth lens 140 can be 25mm, 25.5mm, or 26mm. The aperture D5 of the fifth lens 150 can be 27mm, 27.5mm, or 28mm. The aperture D6 of the sixth lens 160 can be 23mm, 23.5mm, or 24mm.

[0051] In some embodiments, 9mm≤d1≤10mm, 10mm≤d2≤11mm, 5mm≤d3≤6mm, 2mm≤d4≤3mm, 4mm≤d5≤5mm, and 8mm≤d6≤9mm; wherein d1 is the center thickness of the first lens 110, d2 is the center thickness of the second lens 120, d3 is the center thickness of the third lens 130, d4 is the center thickness of the fourth lens 140, d5 is the center thickness of the fifth lens 150, and d6 is the center thickness of the sixth lens 160.

[0052] Generally, a larger center thickness of a lens results in greater rigidity, easier clamping, and better field curvature control, but also leads to increased weight, chromatic aberration, and higher light loss. Conversely, a smaller center thickness results in a lightweight and compact optical lens structure, lower chromatic aberration, and higher light transmission, but makes it more prone to deformation, more difficult to clamp, and has weaker field curvature correction. Therefore, by appropriately setting the center thicknesses of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, and the sixth lens 160, issues such as rigidity, field curvature, and chromatic aberration can be balanced to optimize the imaging performance of the entire optical lens structure and achieve a lightweight and compact design.

[0053] For example, the center thickness d1 of the first lens 110 can be 9mm, 9.5mm, or 10mm. The center thickness d2 of the second lens 120 can be 10mm, 10.5mm, or 11mm. The center thickness d3 of the third lens 130 can be 5mm, 5.5mm, or 6mm. The center thickness d4 of the fourth lens 140 can be 2mm, 2.5mm, or 3mm. The center thickness d5 of the fifth lens 150 can be 4mm, 4.5mm, or 5mm. The center thickness d6 of the sixth lens 160 can be 8mm, 8.5mm, or 9mm.

[0054] Reference Figure 1 and Figure 2 As shown, in some embodiments, the eyepiece assembly 300 includes a seventh lens 310, an eighth lens 320, and a ninth lens 330 arranged sequentially from the object side to the image side along the main optical path. The object side of the seventh lens 310 is convex, and the image side is concave; the object side of the eighth lens 320 is convex, and the image side is convex; the object side of the ninth lens 330 is convex, and the image side is concave. This arrangement can achieve a large field of view, a flat image field, and low distortion eyepiece imaging effect. At the same time, it can optimize the incident angle of edge incident rays, correct off-axis coma and field curvature, balance on-axis aberrations, and extend the exit pupil distance of the eyepiece assembly 300.

[0055] For example, the seventh lens 310 may be made of lanthanum crown glass, the eighth lens 320 may be made of heavy lanthanum flint glass, and the ninth lens 330 may be made of heavy flint glass.

[0056] In some embodiments, the optical lens structure satisfies: 0.02≤|Φ7|≤0.03, 0.03≤|Φ8|≤0.04, 0.01≤|Φ9|≤0.02; where |Φ7| is the absolute value of the optical power of the seventh lens, |Φ8| is the absolute value of the optical power of the eighth lens, and |Φ9| is the absolute value of the optical power of the ninth lens.

[0057] By reasonably setting the absolute optical power values ​​of the seventh lens 310, the eighth lens 320, and the ninth lens 330, the optical path length and pixel size can be well balanced, which is conducive to improving the imaging quality of the entire optical lens structure.

[0058] For example, the absolute value of the optical power |Φ7| of the seventh lens 310 can be 0.02, 0.025, or 0.03. The absolute value of the optical power |Φ8| of the eighth lens 320 can be 0.03, 0.035, or 0.04. The absolute value of the optical power |Φ9| of the ninth lens 330 can be 0.01, 0.015, or 0.02.

[0059] In some embodiments, the optical lens structure satisfies: 26mm≤D7≤27mm, 28mm≤D8≤29mm, 28mm≤D9≤29mm; wherein, D7 is the aperture of the seventh lens 310, D8 is the aperture of the eighth lens 320, and D9 is the aperture of the ninth lens 330.

[0060] By properly setting the aperture of the seventh lens 310, the eighth lens 320, and the ninth lens 330, the design requirements for pixels and size can be balanced.

[0061] For example, the aperture D7 of the seventh lens 310 can be 26mm, 26.5mm, or 27mm. The aperture D8 of the eighth lens 320 can be 28mm, 28.5mm, or 29mm. The aperture D9 of the ninth lens 330 can be 28mm, 28.5mm, or 29mm.

[0062] In some embodiments, the optical lens structure satisfies: 9mm≤d7≤10mm, 10mm≤d8≤11mm, 5mm≤d9≤6mm; wherein, d7 is the center thickness of the seventh lens 310, d8 is the center thickness of the eighth lens 320, and d9 is the center thickness of the ninth lens 330.

[0063] By rationally setting the center thickness of the seventh lens 310, the eighth lens 320, and the ninth lens 330, issues such as rigidity, field curvature, and chromatic aberration can be balanced to optimize the imaging performance of the entire optical lens structure and achieve a lightweight and compact design.

[0064] For example, the center thickness d7 of the seventh lens 310 can be 9mm, 9.5mm, or 10mm. The center thickness d8 of the eighth lens 320 can be 10mm, 10.5mm, or 11mm. The center thickness d9 of the ninth lens 330 can be 5mm, 5.5mm, or 6mm.

[0065] Reference Figure 1 and Figure 2 As shown, in some embodiments, the optical lens structure further includes an OLED (Organic Light-Emitting Diode) display element 600 and a beam combining optical element 700, the beam combining optical element 700 being located in the main optical path and between the objective lens assembly 100 and the image-rotating lens assembly 200; the OLED being located on one side of the beam combining optical element 700 and outside the main optical path.

[0066] In practice, in order to achieve aiming imaging of an optical device with an optical lens structure, an OLED display element 600 can be set up to display a digital image, which can be fused with the intermediate image formed by the objective lens assembly 100 to form a fused image that can be observed and aimed by the human eye, so as to meet the visual aiming requirements of the optical lens structure as a sight.

[0067] For example, in a low-light environment, the imaging process is as follows: the objective lens assembly 100 performs a primary imaging of the target scene and forms an intermediate image at the intermediate image plane. Next, the image intensification optics 500 receives the intermediate image, performs photoelectric conversion and electron multiplication processing, and outputs an enhanced visible light image. Then, the enhanced image is optically coupled to the OLED display element 600 and spatially aligned with a digital image (such as symbolic information or thermal image) pre-stored on the OLED display surface. The two images are optically combined by a beam-combining optics element 700 (such as a beam-combining prism) to form a single-path fused image. The fused image is magnified by the eyepiece assembly 300 and made available for human observation, realizing the superimposed display of the low-light scene and digital information.

[0068] For visible light environments, the imaging process is as follows: The objective lens assembly 100 performs a primary imaging of the target scene, forming an intermediate real image at the intermediate image plane. Then, the intermediate image is transmitted to the visible light incident surface of the beam combining optical element 700. A digital image (such as an electronic reticle, aiming mark, or tactical information) pre-stored in the OLED display element 600 is collimated and incident as a parallel beam onto the digital light incident surface of the beam combining optical element 700. The two images are optically combined by the beam combining optical element 700 (such as a beam combining prism) to form a coaxial through-view image. The through-view image is magnified by the eyepiece assembly 300 and projected at infinity or a distance of clear vision for human observation, achieving the superimposed display of the visible light scene and digital information.

[0069] In some embodiments, the absolute value of the optical power of the beam combining optical element 700 is zero. This setting can improve the image synthesis quality, reduce the introduction of aberrations, and avoid the problem of non-coplanar images.

[0070] Furthermore, in this embodiment, 11mm≤D 合光 ≤12mm, D 合光 The aperture of the beam combining optical element 700 is determined by appropriately setting the aperture D of the beam combining optical element 700. 合光 This achieves optimal structural compactness with the field stop, human eye exit pupil, and optical lens structure of the eyepiece assembly 300, while ensuring that the beam passes through the entire field of view without vignetting.

[0071] For example, the aperture of the beam combining optical element 700 may be 11 mm, 11.5 mm, or 12 mm.

[0072] Furthermore, in this embodiment, 12mm≤d 合光 ≤13mm, d 合光 The center thickness d of the beam combining optical element 700 is determined by reasonably setting the center thickness d of the beam combining optical element 700. 合光 This design balances structural rigidity, assembly stability, and lightweight requirements while ensuring that the beam combining optical element 700 has sufficient optical path length to achieve efficient beam splitting and combining.

[0073] For example, the center thickness d of the beam combining optical element 700 合光 It can be 12mm, or 12.5mm or 13mm.

[0074] Reference Figure 1 and Figure 2 As shown, in some embodiments, the image-spinning lens assembly 200 includes a tenth lens 210, an eleventh lens 220, a twelfth lens 230, and a thirteenth lens 240 arranged sequentially from the object side to the image side along the main optical path. The object side and image side of the tenth lens 210 are both convex. The object side and image side of the eleventh lens 220 are both convex. The object side and image side of the twelfth lens 230 are both concave. The object side and image side of the thirteenth lens 240 are both concave.

[0075] The tenth lens 210, eleventh lens 220, twelfth lens 230, and thirteenth lens 240 adopt a symmetrical "biconvex-biconvex-biconcave-meniscus" structural layout, achieving comprehensive optimization of aberration complementary correction, optical path relay image conversion, and overall system length compression. In other words, the image conversion lens assembly 200 adopts a four-element structure, which can suppress and eliminate on-axis spherical aberration and off-axis astigmatism generated during the image conversion process, improve the overall image quality of the lens, and has the advantages of small size and light weight.

[0076] In some embodiments, the optical lens structure satisfies: 0.07 ≤ |Φ 10 |≤0.08, 0.28≤|Φ 11 |≤0.29, 0.12≤|Φ 12 |≤0.13, 0.06≤|Φ 13 |≤0.07; where |Φ 10 | represents the absolute value of the optical power of the tenth lens, |Φ 11 | represents the absolute value of the optical power of the eleventh lens, |Φ 12 | represents the absolute value of the optical power of the twelfth lens, |Φ 13 | represents the absolute value of the optical power of the thirteenth lens.

[0077] By reasonably setting the absolute optical power values ​​of the tenth lens 210, the eleventh lens 220, the twelfth lens 230, and the thirteenth lens 240, the optical path length and pixel size can be well balanced, which is conducive to improving the imaging quality of the entire optical lens structure.

[0078] For example, the absolute value of the optical power of the tenth lens 210 |Φ 10 | It can be 0.07, 0.075, or 0.08. The absolute value of the optical power of the eleventh lens 220 |Φ 11 | It can be 0.28, 0.285, or 0.29. Absolute value of optical power of the twelfth lens 230 |Φ 12 | It can be 0.12, 0.125, or 0.13. Absolute value of optical power of the thirteenth lens 240 |Φ 13 It can be 0.06, 0.065, or 0.07.

[0079] In some embodiments, 10mm≤D 10 ≤11mm, 10mm≤D 11 ≤11mm, 10mm≤D 12 ≤11mm, 12mm≤D 13 ≤13mm; where D 10 D is the aperture of the tenth lens 210. 11 The aperture of the eleventh lens 220 is D. 12 D is the aperture of the twelfth lens 230. 13 This is the aperture of the thirteenth lens, 240.

[0080] By properly setting the aperture of the tenth lens 210, the eleventh lens 220, the twelfth lens 230, and the thirteenth lens 240, the design requirements for pixels and size can be balanced.

[0081] For example, the aperture D of the tenth lens 210 10 It can be 10mm, 10.5mm, or 11mm. The aperture D of the eleventh lens 220... 11 It can be 10mm, 10.5mm, or 11mm. The aperture D of the twelfth lens 230... 12 It can be 10mm, 10.5mm, or 11mm. The aperture D of the thirteenth lens 240... 13 It can be 12mm, or 12.5mm or 13mm.

[0082] In some embodiments, 1mm≤d 10 ≤2mm, 3mm≤d11 ≤4mm, 1mm≤d 12 ≤2mm, 4mm≤d13≤5mm; where d 10 The center thickness of the tenth lens 210 is d. 11 d is the center thickness of the eleventh lens 220. 12 The center thickness of the twelfth lens 230 is d. 13 The center thickness of the thirteenth lens 240.

[0083] By rationally setting the center thickness of the tenth lens 210, the eleventh lens 220, the twelfth lens 230, and the thirteenth lens 240, issues such as rigidity, field curvature, and chromatic aberration can be balanced to optimize the imaging performance of the entire optical lens structure and achieve a lightweight and compact design.

[0084] For example, the center thickness d of the tenth lens 210 10 It can be 1mm, 1.5mm, or 2mm. The center thickness d of the eleventh lens 220. 11 It can be 3mm, 3.5mm, or 4mm. The center thickness d of the twelfth lens 230. 12 It can be 1mm, 1.5mm, or 2mm. The center thickness d of the thirteenth lens 240. 13 It can be 4mm, or 4.5mm or 5mm.

[0085] In some embodiments, the angle between the outgoing light rays of the objective lens assembly 100 and the normal of the image intensifying optical element 500 is no greater than 4.1°, thereby ensuring that the energy reduction caused by the incident angle of the light rays is no greater than 40%, and avoiding the appearance of dark corners at the edges of the OLED display element 600 in low-light environments, which would affect the image quality.

[0086] For example, the low-light band of the optical lens structure is 480nm-900nm, and the visible light band of the optical lens structure is 486nm-656nm. The dual-band design is designed to balance sensitivity in low-light environments and color fidelity in low-light environments.

[0087] In addition, the magnification of the optical lens structure is not less than 4, ensuring that the detail resolution capability of the target environment meets the requirements of tactical identification.

[0088] The objective lens assembly 100 has a full field of view of 10°-11° to balance the search efficiency of the target environment with the edge imaging quality.

[0089] The relative aperture of the objective lens assembly 100 is not less than 1 / 1.2, ensuring sufficient light-gathering capability in low-light environments and improving the signal-to-noise ratio of low-light imaging.

[0090] The eyepiece assembly 300 has an entrance pupil distance of no less than 30mm to allow sufficient eyepoint distance for compatibility with gas masks or goggles, improving comfort and safety during tactical observation. Specific entrance pupil distances can be 30mm, 32mm, or 35mm.

[0091] In summary, the optical lens structure of this embodiment, the design method of sharing the eyepiece assembly 300 and the image-switching lens assembly 200 in both low-light and visible light environments, and the image-switching lens assembly 200 and the beam-combining optical element 700 to form a relay system combination, together with the objective lens assembly 100, can reduce the overall length of the optical lens structure and facilitate the rapid switching between low-light and visible light modes.

[0092] The specific imaging effects are explained below: Combination Figures 3 to 5 As shown, where Figure 3 This diagram illustrates the system dot plot of the objective lens assembly 100 with its optical lens structure in a low-light environment. Figure 3 As can be seen, the RMS of the blur spot at the central field of view is less than 9.87 μm, and the RMS of the blur spot at the maximum off-axis field of view is less than 11.16 μm, indicating that the aberrations of the optical lens structure have been well corrected and the imaging quality is excellent.

[0093] Figure 4 The system MTF diagram of the objective lens assembly 100 with optical lens structure in a low-light environment is shown. Figure 4 It can be seen that the MTF at the center field of view is better than 0.4 at 38 lp / mm, and the MTF at the maximum off-axis field of view is better than 0.3 at 38 lp / mm, which meets the usage requirements.

[0094] Figure 5 The diagram illustrates the distortion and field curvature of the objective lens assembly 100 with its optical lens structure in a low-light environment. From... Figure 5 It is clear that the distortion at the maximum field of view is better than 2.6%.

[0095] Combination Figures 6-8 As shown, where Figure 6 The diagram illustrates the system dot plot of the objective lens assembly 100 in a visible light environment during the day. It can be seen that the RMS of the spot of confusion at the central field of view is less than 3.6 μm, and the RMS of the spot of confusion at the maximum off-axis field of view is less than 5 μm, indicating that the optical lens structure has concentrated energy and excellent imaging quality.

[0096] Figure 7 The system MTF diagram of the objective lens assembly 100 in a visible light environment during the day is shown. The MTF at the center field of view is better than 0.7 at 50 lp / mm, and the MTF at the maximum off-axis field of view is better than 0.38 at 38 lp / mm, indicating that the lens has excellent detail resolution capabilities and meets the usage requirements.

[0097] Figure 8 The diagram illustrates the distortion and field curvature of the objective lens assembly 100 in a visible light environment during the day. From... Figure 8 It is clear that the distortion at the maximum field of view is better than 2.78%.

[0098] Combination Figures 9 to 11 As shown, where Figure 9 The diagram illustrates the system dot plot of the image-shifting lens assembly 200 and the eyepiece assembly 300. It can be seen that the RMS of the blur spot at the central field of view is less than 8.86 μm, and the RMS of the blur spot at the maximum off-axis field of view is less than 23.27 μm, indicating that the imaging quality of the optical lens structure matches the requirements of human eye use.

[0099] Figure 10 The system MTF diagram of the combination of the image-shifting lens assembly 200 and the eyepiece assembly 300 is shown. The MTF at the center field of view is better than 0.55 at 30 lp / mm, and the MTF at the maximum off-axis field of view is better than 0.22 at 38 lp / mm, indicating that the lens is suitable for human eye use.

[0100] Figure 11 The diagram illustrates the distortion and field curvature of the image-shifting lens assembly 200 and the eyepiece assembly 300. From... Figure 11 It is clear that the distortion at the maximum field of view is better than 2.68%.

[0101] Reference Figures 1 to 13 As shown, this embodiment also provides an optical device, including a housing 800 and the optical lens structure described above, wherein the objective lens assembly 100, the image-rotating lens assembly 200 and the eyepiece assembly 300 are all located within the housing 800.

[0102] For example, optical devices can be such as aiming scopes or observation scopes.

[0103] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0104] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An optical lens structure, characterized in that, It includes an objective lens assembly, an image-rotating lens assembly, and an eyepiece assembly arranged sequentially from the object side to the image side along the main optical path; The optical lens structure further includes a conversion device and an image enhancement optical element connected to the conversion device. The conversion device is used to switch the image enhancement optical element to the main optical path between the objective lens assembly and the image inversion lens assembly when the optical lens structure is in a low-light environment, and can switch the image enhancement optical element to outside the main optical path when the optical lens structure is in a visible light environment.

2. The optical lens structure according to claim 1, characterized in that, The conversion device includes a rotating mechanism and a carrier connected to the rotating mechanism. The image intensifying optical element is disposed on the carrier. The rotating mechanism can rotate under the action of an external force, so that the carrier rotates and the image intensifying optical element is switched to different positions.

3. The optical lens structure according to claim 2, characterized in that, The rotating mechanism includes an intermediate shaft assembly and a toggle member passing through one end of the intermediate shaft assembly. The support member is provided with a mounting hole through which the other end of the toggle member can pass. And / or, the carrier includes a circular carrier body and a connecting body disposed on one side of the carrier body, the carrier body is provided with a mounting port for mounting the image enhancement optical element, and the connecting body is connected to the rotating mechanism.

4. The optical lens structure according to any one of claims 1 to 3, characterized in that, The objective lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side along the main optical path; The first lens has positive refractive power, and the object side of the first lens is convex, while the image side is concave. The second lens has positive refractive power, and the object side and the image side of the second lens are both convex. The third lens has negative refractive power, and the object side and image side of the third lens are concave. The fourth lens has negative refractive power, and the object side and image side of the fourth lens are concave. The fifth lens has positive refractive power, and the object side and the image side of the fifth lens are both convex. The sixth lens has positive refractive power, and the object side of the sixth lens is convex, while the image side is concave.

5. The optical lens structure according to claim 4, characterized in that, The optical lens structure satisfies: 0.007≤|Φ1|≤0.008, 0.01≤|Φ2|≤0.02, 0.01≤|Φ3|≤0.02, 0.02≤|Φ4|≤0.03, 0.03≤|Φ5|≤0.04, 0.009≤|Φ6|≤0.01; where |Φ1| is the absolute value of the optical power of the first lens, |Φ2| is the absolute value of the optical power of the second lens, |Φ3| is the absolute value of the optical power of the third lens, |Φ4| is the absolute value of the optical power of the fourth lens, |Φ5| is the absolute value of the optical power of the fifth lens, and |Φ6| is the absolute value of the optical power of the sixth lens; And / or, 69mm≤D1≤70mm, 37mm≤D2≤38mm, 37mm≤D3≤38mm, 25mm≤D4≤26mm, 27mm≤D5≤28mm, 23mm≤D6≤24mm; wherein, D1 is the aperture of the first lens, D2 is the aperture of the second lens, D3 is the aperture of the third lens, D4 is the aperture of the fourth lens, D5 is the aperture of the fifth lens, and D6 is the aperture of the sixth lens; And / or, 9mm≤d1≤10mm, 10mm≤d2≤11mm, 5mm≤d3≤6mm, 2mm≤d4≤3mm, 4mm≤d5≤5mm, 8mm≤d6≤9mm; wherein, d1 is the center thickness of the first lens, d2 is the center thickness of the second lens, d3 is the center thickness of the third lens, d4 is the center thickness of the fourth lens, d5 is the center thickness of the fifth lens, and d6 is the center thickness of the sixth lens.

6. The optical lens structure according to any one of claims 1 to 3, characterized in that, The eyepiece assembly includes a seventh lens, an eighth lens, and a ninth lens arranged sequentially from the object side to the image side along the main optical path; The object-side surface of the seventh lens is convex, and the image-side surface is concave. The object-side surface of the eighth lens is convex, and the image-side surface is also convex. The object-side surface of the ninth lens is convex, and the image-side surface is concave. The optical lens structure satisfies: 0.02≤|Φ7|≤0.03, 0.03≤|Φ8|≤0.04, 0.01≤|Φ9|≤0.02; where, |Φ7| is the absolute value of the optical power of the seventh lens, |Φ8| is the absolute value of the optical power of the eighth lens, and |Φ9| is the absolute value of the optical power of the ninth lens; And / or, 26mm≤D7≤27mm, 28mm≤D8≤29mm, 28mm≤D9≤29mm; wherein, D7 is the aperture of the seventh lens, D8 is the aperture of the eighth lens, and D9 is the aperture of the ninth lens; And / or, 9mm≤d7≤10mm, 10mm≤d8≤11mm, 5mm≤d9≤6mm; wherein, d7 is the center thickness of the seventh lens, d8 is the center thickness of the eighth lens, and d9 is the center thickness of the ninth lens.

7. The optical lens structure according to any one of claims 1 to 3, characterized in that, The optical lens structure also includes an OLED display element and a beam combining optical element. The beam combining optical element is located on the main optical path and between the objective lens assembly and the image-rotating lens assembly. The OLED is located on one side of the beam combining optical element and outside the main optical path. The absolute power of the beam combining optical element is zero; and / or, 11mm ≤ D 合光 ≤12mm, where D 合光 Where d is the aperture of the beam combining optical element; and / or, 12mm ≤ d 合光 ≤13mm, where d 合光 The center thickness of the beam combining optical element.

8. The optical lens structure according to any one of claims 1 to 3, characterized in that, The image-rotating lens assembly includes a tenth lens, an eleventh lens, a twelfth lens, and a thirteenth lens arranged sequentially from the object side to the image side along the main optical path; The object side of the tenth lens is convex, and the image side is convex. The object-side surface of the eleventh lens is convex, and the image-side surface is also convex. The object side of the twelfth lens is concave, and the image side is also concave. The object-side surface of the thirteenth lens is concave, and the image-side surface is convex.

9. The optical lens structure according to claim 8, characterized in that, The optical lens structure satisfies: 0.07≤|Φ 10 |≤0.08, 0.28≤|Φ 11 |≤0.29, 0.12≤|Φ 12 |≤0.13, 0.06≤|Φ 13 |≤0.07; where |Φ 10 | represents the absolute value of the optical power of the tenth lens, |Φ 11 | represents the absolute value of the optical power of the eleventh lens, |Φ 12 | represents the absolute value of the optical power of the twelfth lens, |Φ 13 | represents the absolute value of the optical power of the thirteenth lens; And / or, 10mm≤D 10 ≤11mm, 10mm≤D 11 ≤11mm, 10mm≤D 12 ≤11mm, 12mm≤D 13 ≤13mm; where D 10 D is the aperture of the tenth lens. 11 D is the aperture of the eleventh lens. 12 D is the aperture of the twelfth lens. 13 The aperture of the thirteenth lens; And / or, 1mm≤d 10 ≤2mm, 3mm≤d 11 ≤4mm, 1mm≤d 12 ≤2mm, 4mm≤d 13 ≤5mm; where d 10 d is the center thickness of the tenth lens. 11 d is the center thickness of the eleventh lens. 12 d is the center thickness of the twelfth lens. 13 The center thickness of the thirteenth lens.

10. An optical device, characterized in that, The device includes a housing and an optical lens structure as described in any one of claims 1 to 9, wherein the objective lens assembly, the image-rotating lens assembly, and the eyepiece assembly are all disposed within the housing.

Images