An optical system assembly frame, a device equipped with an optical system, and an assembly and adjustment method.

Abstract

This invention relates to an optical system assembly frame, a device for assembling an optical system, and an assembly and adjustment method, belonging to the field of optical imaging devices, and solves the problem of complex structures in existing optical system devices. The assembly frame includes an imaging primary mirror structure, an image-rotating lens structure, a support flange, and a connecting rod; one end of the connecting rod is fixedly connected to the support flange by a fixing bolt, and the other end of the connecting rod is connected to the imaging primary mirror structure by an adjusting screw; the image-rotating lens structure is screwed to the support flange. This invention achieves a simple structure for the optical system assembly frame.

Description

Technical Field

[0001] This invention relates to the field of optical imaging device technology, and in particular to an optical system assembly frame, a device equipped with an optical system, and an assembly and adjustment method. Background Technology

[0002] Traditional target electro-optical reconnaissance cameras have a small field of view, requiring the entire device to be scanned or manually spliced ​​and adjusted through multiple optical lenses to expand the search field of view. The entire device is very complicated and inconvenient, making it difficult to conduct convenient and rapid real-time surveillance of large areas. It cannot meet the modern requirements for comprehensiveness, accuracy, and compactness of reconnaissance equipment.

[0003] The existing optical system has a complex assembly frame structure and numerous components, making the entire device very cumbersome. This not only increases the cost of the entire device and reduces production efficiency, but also makes it inconvenient to assemble and move. Summary of the Invention

[0004] In view of the above analysis, the present invention aims to provide an optical system assembly frame, an apparatus equipped with an optical system, and an assembly and adjustment method to solve the problem of complex structure of optical imaging system assembly frames in the prior art.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] An array optical system assembly frame includes an imaging primary mirror structure, an image-rotating lens structure, a support flange, and a connecting rod; one end of the connecting rod is fixedly connected to the support flange by a fixing bolt, and the other end of the connecting rod is connected to the imaging primary mirror structure by an adjusting screw; the image-rotating lens structure is screwed to the support flange.

[0007] Furthermore, the imaging primary mirror structure includes an imaging primary mirror frame and threaded retaining rings; two threaded retaining rings are provided, respectively located at the front end and rear end of the imaging primary mirror frame, so that the optical system inside the imaging primary mirror frame can be fixed inside the imaging primary mirror frame by the two threaded retaining rings.

[0008] Furthermore, the imaging primary lens frame includes a front end face, a straight cylindrical section, and a rear end face. The front end face and the rear end face are respectively fixedly disposed on the front and rear sides of the straight cylindrical section. The three are integrally formed, and a straight cylindrical cavity that runs through the entire imaging primary lens frame is opened in the middle.

[0009] Furthermore, four primary mirror threaded through holes are provided at the edge of the rear end face; the diameter of the primary mirror threaded through holes is slightly larger than the diameter of the adjusting screw, and is used for radial adjustment of the imaging primary mirror structure in the later stage.

[0010] Furthermore, four rotating lens structural components are provided, and each rotating lens structural component has the same structure; the rotating lens structural component includes a rotating lens frame, a rotating lens threaded retaining ring, and a metal spacer; the rotating lens threaded retaining ring is helically connected to the rotating lens frame through the external thread of the rotating lens threaded retaining ring, and adjacent independent lenses inside the rotating lens are isolated by metal spacers.

[0011] Furthermore, the support flange has four rotating lens assembly connection through holes, including a first rotating lens connection through hole, a second rotating lens connection through hole, a third rotating lens connection through hole, and a fourth rotating lens connection through hole; it also has four fixing through holes.

[0012] Furthermore, the central axes of the first rotating lens connecting through hole, the second rotating lens connecting through hole, the third rotating lens connecting through hole, and the fourth rotating lens connecting through hole are set at an angle.

[0013] Furthermore, a total of four connecting rods are provided. One end of each connecting rod is provided with a fixed internal thread hole, and the other end is provided with an adjusting internal thread hole. The fixing bolt passes through the fixing through hole and is screwed into the fixed internal thread hole at one end of the connecting rod. The adjusting screw passes through the main mirror thread through hole and is screwed into the adjusting internal thread hole at the other end of the connecting rod.

[0014] Furthermore, an apparatus equipped with an optical system includes an optical system mounting frame and an optical system, wherein the optical system includes an imaging primary mirror and an image-rotating mirror group; the primary mirror is used to transmit visible light rays to form a primary imaging visible light real image plane, and the image-rotating mirror group is used to transmit visible light rays to form a secondary imaging visible light real image plane.

[0015] Furthermore, a method for assembling and adjusting a device equipped with an optical system includes the following specific steps:

[0016] S1: Fix each rotating lens in the designed and assembled rotating lens group to the support flange respectively;

[0017] S2: Fix one end of each of the four connecting rods to the support flange;

[0018] S3: Connect the other end of the four connecting rods to the imaging primary mirror structure;

[0019] S4: Fine-tune the imaging primary mirror structure to ensure that the entire optical system can present a clear image.

[0020] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0021] (1) The optical system assembly frame of the present invention achieves the fixed connection and adjustment connection between the imaging primary mirror structure and the support flange through only four connecting rods, which greatly reduces the overall component setting of the assembly frame, making its overall structure simple and miniaturized, while saving costs and improving production efficiency.

[0022] (2) In this invention, the rotating lens frame, rotating lens threaded pressure ring and metal spacer are made of aluminum alloy material commonly used in optomechanical systems. They are easy to process, lightweight and of moderate strength. The external tolerance of all the rotating lens structural parts is guaranteed by design and processing accuracy. They can be directly assembled. The assembled and fixed rotating lens group forms a complete component without the need for additional adjustments, which improves the assembly and adjustment efficiency.

[0023] (3) In order to make the connecting rod and the fixed through hole more firmly in contact and prevent misalignment, a fixed convex corner is provided around each fixed through hole on the concave surface of the support flange. The plane of the fixed convex corner is set at a certain slight angle to the horizontal surface of the concave surface of the support flange. The purpose of setting the fixed convex corner is to increase the area of ​​the end face of the connecting rod and the fixed convex corner of the support flange when the connecting rod is connected to the support flange, so that the two are completely in contact with each other, and to avoid slight misalignment after the connecting rod and the support flange are fixedly connected, which would affect the imaging effect of the entire system.

[0024] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or may be learned by practicing the invention. Attached Figure Description

[0025] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0026] Figure 1 This is a schematic diagram of the structure of an optical system device according to the present invention;

[0027] Figure 2 This is a front view of an optical system device according to the present invention;

[0028] Figure 3 For the present invention Figure 2 Sectional view of plane AA in the middle;

[0029] Figure 4 For the present invention Figure 2 BB section view in the middle;

[0030] Figure 5 This is a partial cross-sectional view of a steering mirror in an optical system device according to the present invention. Figure 1 ;

[0031] Figure 6 This is a partial cross-sectional view of a steering mirror in an optical system device according to the present invention. Figure 2 ;

[0032] Figure 7 This is a right view of an optical system device according to the present invention;

[0033] Figure 8 This is a schematic diagram of the supporting flange in the assembly frame of an optical system according to the present invention;

[0034] Figure 9 This is a schematic diagram of a 20°×16° scene image representing the subsystem formed by the imaging primary mirror and the steering lens in an optical system of the present invention.

[0035] Figure 10 This is a schematic diagram of a 36°×28° scene image represented by four subsystems in an optical system of the present invention.

[0036] Figure label:

[0037] 1-Imaging primary lens; 11-Solid spherical lens; 12-First outer lens; 13-Second outer lens;

[0038] 2-Turning lens group; 21-First rotating lens; 22-Second rotating lens; 23-Third rotating lens; 24-Fourth rotating lens; 211-First lens element; 212-Second lens element; 213-Third lens group; 2131-Head lens of the third lens group; 2132-End lens of the third lens group; 214-Fourth lens group; 2141-Head lens of the fourth lens group; 2142-End lens of the fourth lens group; 215-Fifth lens element; 216-Sixth lens element;

[0039] 3-Imaging primary mirror structural component; 31-Imaging primary mirror frame; 311-Front end face; 312-Straight section; 313-Rear end face; 3131-Primary mirror threaded through hole; 32-Threaded retaining ring; 4-Spinning lens structural component; 41-Spinning lens frame; 42-Spinning lens threaded retaining ring; 43-Metal spacer; 44-Turning lens external thread; 5-Support flange; 51-First rotating lens connection through hole; 52-Second rotating lens connection through hole; 53-Third rotating lens connection through hole; 54-Fourth rotating lens connection through hole; 55-Fixing through hole; 6-Connecting support rod; 7-Adjusting shim; 8-Adjusting screw; 9-Fixing screw;

[0040] S1: The object-facing surface of the first lens 211; S2: The image-facing surface of the first lens 211; S3: The object-facing surface of the second lens 212; S4: The image-facing surface of the second lens 212; S5: The object-facing surface of the third lens group 213; S6: The glued surface of the third lens group headpiece 2131 and the third lens group headpiece 2132; S7: The image-facing surface of the third lens group 213; S8: The object-facing surface of the fourth lens group 214; S9: The glued surface of the fourth lens group headpiece 2141 and the fourth lens group headpiece 2142; S10: The image-facing surface of the fourth lens group 214; S11: The object-facing surface of the fifth lens 215; S12: The image-facing surface of the fifth lens 215; S13: The object-facing surface of the sixth lens 216; S14: The image-facing surface of the sixth lens 216. Detailed Implementation

[0041] The following detailed description, in conjunction with specific embodiments, provides an optical system mounting bracket, an apparatus equipped with an optical system, and an assembly and adjustment method. These embodiments are for comparative and illustrative purposes only, and the present invention is not limited to these embodiments.

[0042] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0043] Throughout the text, the terms “top,” “bottom,” “above,” “below,” and “on top” refer to the relative positions of components of the device, such as the relative positions of the top and bottom substrates within the device. It is understood that the device is multifunctional and independent of its spatial orientation.

[0044] The working surface of this invention can typically be a plane or a curved surface, and can be inclined or horizontal. For ease of explanation, the embodiments of this invention are placed on a horizontal surface and used on a horizontal surface, thereby defining "height" and "vertical".

[0045] It should be noted that the object side refers to the side where the light rays are incident, and the image side refers to the side where they are emitted. "From the object side to the image side along the optical axis" means... Figure 1 The direction from left to right or from front to back.

[0046] Example 1

[0047] One specific embodiment of the present invention discloses an apparatus having an optical system, including the optical system and a mounting bracket suitable for the optical system.

[0048] Preferably, the optical system is an array optical system based on an imaging primary mirror.

[0049] Furthermore, the array optical system based on the imaging primary mirror includes an imaging primary mirror 1 and an image-rotating mirror group 2. The primary mirror 1 is disposed at the front end of the image-rotating mirror group 2, and the two are parallel to each other and arranged on the same main axis. The primary mirror 1 is used to realize primary imaging, and is used to transmit visible light rays to form a primary imaging visible light real image plane. The image-rotating mirror group 2 is used to realize secondary imaging, and is used to transmit visible light rays to form a secondary imaging visible light real image plane.

[0050] Furthermore, such as Figures 1-3 As shown, the imaging primary lens 1 includes a solid spherical lens 11, a first outer lens 12, and a second outer lens 13. The first outer lens 12 and the first outer lens 13 are respectively disposed on the front and rear sides of the solid spherical lens 11 (i.e., Figure 1 The left and right sides of the image are glued together to form the imaging primary mirror 1.

[0051] Furthermore, such as Figures 3-4 As shown, the solid spherical lens 11 is a near-spherical lens, with its axis coaxial with the main axis. The solid spherical lens 11 has a diameter of 28 mm, a thickness of 4.85 mm, a front surface radius of curvature of 20 mm, and a rear surface radius of curvature of 15.15 mm. The first outer lens 12 is a near-hemispherical meniscus lens with a diameter of 24 mm, a thickness of 29.7 mm, a front radius of curvature of 14.85 mm, and a rear radius of curvature of -14.85 mm. The second outer lens 13 is a near-hemispherical meniscus lens with a diameter of 28 mm, a thickness of 4.85 mm, a front radius of curvature of -20 mm, and a rear radius of curvature of 15.15 mm.

[0052] Furthermore, the spherical primary mirror 1 is a crucial component of the entire system, serving as the primary imaging element. To reduce chromatic aberration in the visible light band, the spherical primary mirror 1 is composed of two layers of lenses made of different materials. In one embodiment of this application, the first outer lens 12 and the second outer lens 13 use zinc sulfide (ZnS) as the outer layer material with a refractive index of 2.35, while the solid spherical lens 11 uses calcium fluoride as the central lens material with a refractive index of 1.428. Simultaneously, to correct spherical aberration and other aberrations of the spherical primary mirror 1, the radii of curvature of the solid spherical lens 11, the first outer lens 12, and the second outer lens 13 are optimized. The outer radius of curvature of the zinc sulfide lens is 20 mm, and the inner radius of curvature is 15.15 mm, while the radius of curvature of the calcium fluoride lens is 14.85 mm. The imaging primary mirror with these parameters forms the initial primary imaging function.

[0053] Furthermore, in addition to its optical imaging function, the spherical primary mirror 1 also serves as a window cover for the entire system, eliminating the need for window cover considerations and costs. At the same time, due to the small size of the primary mirror, the structure of the entire system with a small front port diameter and a large rear port diameter is also beneficial for the optical system imaging device to be used in the flight of the aerial platform to reduce air resistance.

[0054] Furthermore, the rotating lens group 2 includes a first rotating lens 21, a second rotating lens 22, a third rotating lens 23, and a fourth rotating lens 24. The internal lens optical systems of the first rotating lens 21, the second rotating lens 22, the third rotating lens 23, and the fourth rotating lens 24 are identical.

[0055] Furthermore, such as Figure 5 As shown, the first image-rotating lens 21, along the light incident direction from front to rear (i.e., from left to right in the figure), includes a first lens 211, a second lens 212, a third lens group 213, a fourth lens group 214, a fifth lens 215, and a sixth lens 216. The first lens 211 is a meniscus negative lens, the second lens 212 is a biconvex lens, the third lens group 213 is a cemented convex lens, the fourth lens group 214 is a cemented negative lens, the fifth lens 215 is a biconvex lens, and the sixth lens 216 is a meniscus positive lens.

[0056] Specifically, the first lens 211 has an aperture of 18.6 mm, a lens thickness of 2.5 mm, and a focal length f211 ranging from -49.5 mm to -45.2 mm; the second lens 212 has an aperture of 18.6 mm, a lens thickness of 4.35 mm, and a focal length f212 ranging from 19.8 mm to 22.4 mm; the third lens group 213 has an aperture of 12 mm, a total thickness of 7.87 mm for the cemented lenses, and a focal length f213 ranging from 293.1 mm to 35.2 mm. The fourth lens group 214 has a diameter of 12mm, a total thickness of 9mm for the cemented lens, and a focal length range of -21.9mm ≤ f214 ≤ -24.5mm; the fifth lens group 215 has a diameter of 15mm, a lens thickness of 2.5mm, and a focal length range of 26.4mm ≤ f215 ≤ 30.2mm; the sixth lens group 216 has a diameter of 15mm, a lens thickness of 3.45mm, and a focal length range of 25.8mm ≤ f216 ≤ 27.2mm.

[0057] Furthermore, the refractive index and Abbe coefficient parameters of the first lens 211, the second lens 212, the third lens group 213, the fourth lens group 214, the fifth lens 215, and the sixth lens 216 are shown in Table 1.

[0058] Table 1

[0059]

[0060]

[0061] Furthermore, the third lens group 213 is formed by bonding the head piece 2131 of the third lens group with a meniscus positive lens and the end piece 2132 of the third lens group with a meniscus negative lens from left to right, and the fourth lens group 214 is formed by bonding the head piece 2141 of the fourth lens group with a biconcave negative lens and the end piece 2142 of the fourth lens group with a biconcave positive lens from left to right.

[0062] Furthermore, such as Figure 6 As shown, the radius of curvature of mirror S1 satisfies 30.5mm ≤ R1 ≤ 34.2mm; the radius of curvature of mirror S2 satisfies 20.5mm ≤ R2 ≤ 23.5mm; the radius of curvature of mirror S3 satisfies 20.5mm ≤ R3 ≤ 25.2mm; the radius of curvature of mirror S4 satisfies -45.8mm ≤ R4 ≤ -38.5mm; the radius of curvature of mirror S5 satisfies 7.2mm ≤ R5 ≤ 9.1mm; the radius of curvature of mirror S6 satisfies 16.2mm ≤ R6 ≤ 18.9mm; the radius of curvature of mirror S7 satisfies 5.4mm ≤ R7 ≤ 5.9mm; the radius of curvature of mirror S... The radius of curvature of mirror S8 satisfies -6.8mm ≤ R8 ≤ -5.4mm; the radius of curvature of mirror S9 satisfies -8.2mm ≤ R9 ≤ -7.0mm; the radius of curvature of mirror S10 satisfies 6.1mm ≤ R10 ≤ 7.5mm; the radius of curvature of mirror S11 satisfies 385.0mm ≤ R11 ≤ 402.5mm; the radius of curvature of mirror S12 satisfies -28.6mm ≤ R12 ≤ -23.5mm; the radius of curvature of mirror S13 satisfies 9.1mm ≤ R13 ≤ 10.5mm; and the radius of curvature of mirror S14 satisfies 15.1mm ≤ R14 ≤ 17.5mm.

[0063] Furthermore, each of the imaging primary mirror 1 and the image-rotating mirror group 2 can form a visible light imaging subsystem. The focal length of the subsystem can reach 15.8mm, the F number is 5, the anti-reflection coating wavelength is 480~650nm, and the imaging field of view is 20°×16°.

[0064] One embodiment of the present invention, such as Figure 7 As shown, the rotating mirror group 2 includes a rotating lens 21, a second rotating lens 22, a third rotating lens 23, and a fourth rotating lens 24. These four rotating lenses, together with the imaging main mirror 1 and the four rotating lenses, form four imaging subsystems. The central axis of each rotating lens passes through the center of the imaging main mirror 1, and each rotating lens is set outward at equal intervals with the main mirror 1 as the reference point, so that the four rotating mirror groups and the imaging main mirror 1 form equidistant imaging.

[0065] Specifically, the distance between the rear ends of the lens axes of the first rotating lens 21 and the second rotating lens 22 forms a first horizontal distance, and the distance between the rear ends of the lens axes of the third rotating lens 23 and the fourth rotating lens 24 forms a second horizontal distance; the first horizontal distance and the second horizontal distance are equal and parallel to each other. The distance between the rear ends of the axes of the first rotating lens 21 and the third rotating lens 23 forms a first vertical distance, and the distance between the rear ends of the axes of the second rotating lens 22 and the fourth rotating lens 24 forms a second vertical distance; the first vertical distance and the second vertical distance are equal and parallel to each other.

[0066] Furthermore, such as Figures 7-8 As shown, with the above orientation settings, the rear endpoints of the axes of the four rotating lenses form a rectangle, and the center line connecting the centers of each lens (primary lens + four rotating lenses) in the entire array optical system forms a pyramid shape in space.

[0067] Furthermore, the angles between the central axes of the first rotating lens 21 and the second rotating lens 22, and between the central axes of the third rotating lens 23 and the fourth rotating lens 24, are all 12°. The angles between the central axes of the first rotating lens 21 and the third rotating lens 23, and between the central axes of the second rotating lens 22 and the fourth rotating lens 24, are all 16°. Therefore, the horizontal distance of this device is less than the vertical distance. When the imaging master mirror 1 and each rotating lens form a 20°×16° subsystem, a large system with a field of view of 36°×28° can be formed by setting the above angles. That is, by combining one imaging master mirror 1 with four rotating lenses, the original field of view area can be expanded by nearly 4 times, greatly increasing the field of view range.

[0068] Furthermore, the maximum aperture of each of the rotating lenses is 28mm. To ensure the design angle between the central axes of adjacent rotating lens groups and to prevent them from contacting and interfering with each other, the radial distance between the imaging primary mirror 1 and each rotating lens must be appropriately increased. In one embodiment of this application, this distance is set to 90mm, so that the final length of the entire system is 200mm, the maximum aperture of the front imaging primary mirror is 60mm, and the maximum aperture of the rotating lens group 2 formed by the four rotating lenses at the rear end is 90mm.

[0069] It is worth noting that the spatial design of the rotating mirror group 2 is a major part of the entire system design. It must ensure both the relative positional relationship of the fields of view between each rotating lens and that each rotating lens does not interfere with each other in terms of spatial structure. A key parameter based on the design is the rotation ratio of the rotating mirror group, that is, the ratio of the size of the image plane to the object plane of the rotating mirror group. The selection of this value determines important parameters such as the initial model and size of the system. In one embodiment of the present invention, the rotation ratio is set to 0.3 to ensure that the overlap area of ​​the fields of view is minimized and that the rotating mirror groups do not interfere with each other.

[0070] A preferred embodiment of this application:

[0071] The requirements for a large field-of-view, high-resolution visible light array optical system based on an imaging primary mirror are as follows: the field of view must be 36°×28°, the angular resolution must reach 0.3', the front-end aperture of the system must not exceed 30mm, and the maximum system aperture must not exceed 90mm. The photoelectric sensor adopts a commercial mobile phone module with a size of 30×30mm, a pixel size of 1.4um, and a pixel size of 4K×3k.

[0072] According to the present invention, an optimal combination of data settings for an array optical system based on an imaging primary mirror was implemented, as shown in Table 2 below. In Table 2, the surface S number refers to the sequential numbering of each surface along the optical axis from the object plane to the image plane. Table 2 also includes: the radius of curvature R (mm) of each surface, the thickness t (mm) of each mirror S relative to the next surface, and the distance d (mm) between each mirror S and the next surface.

[0073] Table 2

[0074]

[0075]

[0076] This embodiment uses a photoelectric sensor with a pixel size of 1.4µm to achieve an angular resolution of 0.3', so the focal length of the lens should be 15.8mm. The field of view formed by this focal length lens and a single photoelectric sensor is 20°×16°. To achieve a large field of view of 36°×28°, four photoelectric sensors and four rotating lenses are needed to form four cameras with a rectangular field of view, which are then stitched together.

[0077] In one embodiment of the present invention, the first lens of the imaging primary mirror has an aperture of 28mm, which is capable of receiving light energy within a 36°×28° field of view. To ensure that the four rotating lenses behind the imaging primary mirror 1 do not interfere with each other, and to ensure that the light energy passing through each field of view of the imaging primary mirror 1 enters each rotating lens uniformly, the distance between the imaging primary mirror and the rotating lens group is 90mm, and the maximum aperture of the rotating lens group is 20mm. Since the image plane size formed at the rear end of the rotating lens group 2 needs to reach 7mm, the magnification of the rotating lens group is approximately 0.3. Under these conditions, the focal length of the imaging primary mirror 1 should be approximately three times the system focal length. In this example, the focal length of the imaging primary mirror is set to 49mm.

[0078] Furthermore, the performance indicators that the array optical system based on the imaging primary mirror in this application can achieve by combining the above data parameters are as follows: focal length: 15.8mm; F ​​number: 5; working wavelength: 480nm~650nm; full field of view distortion: ≤10%; field of view: 36°×28°, angular resolution 0.3 minutes.

[0079] Furthermore, an assembly frame suitable for the optical system includes an imaging primary mirror structure 3, an image-rotating lens structure 4, a support flange 5, and a connecting rod 6. One end of the support flange 5 is fixedly connected to the connecting rod 6 by a fixing bolt 9, and the other end is connected to the imaging primary mirror structure 3 by an adjusting screw 8. The image-rotating lens structure 4 is detachably connected to the support flange 5.

[0080] Furthermore, such as Figures 3-4 As shown, the imaging primary mirror structure 3 includes an imaging primary mirror frame 31 and a threaded pressure ring 32. The imaging primary mirror frame 31 includes a front end face 311, a straight cylindrical section 312, and a rear end face 313. The front end face 311 and the rear end face 313 are respectively fixedly disposed on the front and rear sides of the straight cylindrical section 312. The diameters of the front end face 311 and the rear end face 313 are equal, and the diameter of the straight cylindrical section 312 is smaller than the diameter of the front end face 311. The three components are integrally formed, and a straight cylindrical cavity is formed in the middle that runs through the entire imaging primary mirror frame 31.

[0081] Furthermore, the imaging primary mirror 1 described above is disposed within the straight cylindrical cavity of the straight cylindrical section 213 of the imaging primary mirror frame 31. The axis of the imaging primary mirror 1 coincides with the axis of the straight cylindrical section 213. Two threaded retaining rings 32 are respectively disposed at the front and rear ends of the imaging primary mirror 1, allowing the imaging primary mirror 1 to be threadedly fixed within the imaging primary mirror frame 31 via the two threaded retaining rings 32 on the front and rear sides. Transparent glass components are respectively disposed at both ends of the straight cylindrical cavity, flush with both ends of the imaging primary mirror frame 31. These transparent glass components serve to protect the imaging primary mirror 1 while also facilitating observation.

[0082] It should be noted that the three lenses in the imaging primary mirror 1 are fixed in the imaging primary mirror frame 31 by threaded clamps, giving the imaging primary mirror a fixed focal length and field of view, and enabling clear imaging. The dimensional tolerances of all the above parts are guaranteed by design and manufacturing precision, allowing for direct assembly. Once assembled and fixed, the imaging primary mirror 1 forms a complete component without the need for additional adjustments, thus improving assembly efficiency. The imaging primary mirror structural component 3 is made of aluminum alloy, a common material in optomechanical systems, which is easy to process, lightweight, and has moderate strength.

[0083] Furthermore, four primary mirror threaded through holes 3131 are provided at the edge of the rear end face 313 of the imaging primary mirror frame 31, and the four primary mirror threaded through holes 3131 are equidistantly arranged on the side of the rear end face 313. Preferably, the primary mirror threaded through holes 3131 are respectively located at the top, bottom, left, and right ends of the rear end face 313. The diameter of the primary mirror threaded through holes 3131 is slightly larger than the diameter of the adjusting screw 8 to facilitate subsequent adjustment of the imaging primary mirror structure 3.

[0084] Furthermore, such as Figure 5 As shown, there are four rotating lens components 4, each with the same structure. Each rotating lens component 4 includes a rotating lens frame 41, a rotating lens threaded retaining ring 42, and a metal spacer 43. The rotating lens threaded retaining ring 42 connects both ends of each rotating lens described in Embodiment 1 to the rotating lens frame 41 via its external thread, allowing the rotating lens to be fixed within the rotating lens frame 41. Adjacent independent lenses within the rotating lens are isolated from each other using metal spacers 43.

[0085] Furthermore, the image-rotating lens frame 41, the image-rotating lens threaded retaining ring 42, and the metal spacer 43 are made of aluminum alloy, a material commonly used in optomechanical systems. This material is easy to process, lightweight, and has moderate strength. The lens spacing of the image-rotating lens assembly 2 is fixed, and the dimensional tolerances of all the components 4 of the image-rotating lens structure are guaranteed by design and processing precision. They can be directly assembled, and the assembled and fixed image-rotating lens assembly 2 forms a complete component without the need for additional adjustments, thus improving assembly efficiency.

[0086] Furthermore, the outer periphery of the rotating lens frame 41 is provided with a rotating lens external thread 44, which is located on the outer side of the rotating lens frame 41 corresponding to the fourth lens group 214.

[0087] Furthermore, such as Figure 8As shown, the supporting flange 5 is a spherical plate structure with a front surface radius of curvature of 151 mm, a rear surface radius of curvature of 156 mm, a thickness of 5 mm, and a diameter of 100 mm. The supporting flange 5 has four rotating lens assembly connection through holes: a first rotating lens connection through hole 51, a second rotating lens connection through hole 52, a third rotating lens connection through hole 53, a fourth rotating lens connection through hole 54, and four fixing through holes 55. The inner walls of all four rotating lens connection through holes are provided with internal threads, which are helically connected to the external threads of the rotating lenses.

[0088] Furthermore, to accommodate the array optical system based on the imaging primary mirror described in Embodiment 1, the distances between the four image lens connecting through holes and the axis of the supporting flange 5 are all equal, meaning the line connecting the rear ends of the axes of the four rotating image lens connecting through holes forms a rectangle. However, in order to form a field of view of 36° × 28° by stitching together the four rotating image lenses, the arrangement of the four image lens connecting through holes must also adapt to the characteristics of the aforementioned field of view. Therefore, the four image lens connecting through holes must be tilted at a certain angle towards the axis of the supporting flange 5 to achieve this.

[0089] Specifically, the angle between the central axes of the first rotating lens connecting through hole 51 and the second rotating lens connecting through hole 52, and the angle between the central axes of the third rotating lens connecting through hole 53 and the fourth rotating lens connecting through hole 54, is 12°. The angle between the central axes of the first rotating lens connecting through hole 51 and the third rotating lens connecting through hole 53, and the angle between the central axes of the second rotating lens connecting through hole 52 and the fourth rotating lens connecting through hole 54, is 16°.

[0090] Furthermore, the four fixed through holes 55 are equidistantly arranged on the circumferential side of the support flange 5. In order to reduce the diameter of the support flange 5 and the volume of the entire assembly frame, the four fixed through holes are deliberately staggered with the four rotating lens connection through holes, which can greatly save the volume occupied by the entire support flange 5, reduce the diameter of the support flange 5, save material costs, and improve production efficiency.

[0091] Furthermore, in order to ensure a more secure contact between the connecting rod 6 and the fixed through hole 55 and prevent misalignment, a fixed convex angle is provided around each fixed through hole 55 on the concave surface of the support flange 5. The plane of the fixed convex angle is set at a slight angle inward to the horizontal plane of the concave surface of the support flange 5. The purpose of this fixed convex angle is to increase the area between the end face of the connecting rod 6 and the fixed convex angle of the support flange 5 when the connecting rod 6 is connected to the support flange 5, so that the two fit together completely and avoid slight misalignment after the connecting rod 6 and the support flange 5 are fixedly connected, which would affect the imaging effect of the entire system.

[0092] Furthermore, since the mounting bracket is specifically designed for a large field-of-view optical system with a field of view of 36°×28° based on the imaging primary mirror, the angle between the axis of the four fixed through holes 55 and the axis of the support flange 5 is 7°. In order to accommodate the angular relationship between the connecting rod 6 and the imaging primary mirror structure 3 and the rotating lens structure 4, this angle setting is more convenient for later adjustments, making the adjustment range smaller.

[0093] Furthermore, the connecting rod 6 is a cylindrical rod-shaped structure, with four rods in total. One end of the connecting rod 6 has a fixed internal thread hole, through which the fixing bolt 9 passes and is screwed to the fixed internal thread hole of the connecting rod 6 on the other side of the supporting flange 5. The diameter of the connecting rod 6 is larger than that of the fixed through hole 55, allowing the end face of the connecting rod 6 to fit against the fixed convex corner. The other end of the connecting rod 6 has an adjusting internal thread hole, through which the adjusting screw 8 passes and is screwed to the adjusting internal thread hole of the connecting rod 6 on the other side of the imaging primary mirror structure 3. The diameter of the connecting rod 6 is also larger than that of the primary mirror threaded through hole 3131.

[0094] Furthermore, an adjustment shim 7 is provided between the rear end face 313 of the imaging primary mirror frame 31 and the end of the connecting rod 6 with the adjustment internal thread hole, for adjusting the spatial positional relationship between the imaging primary mirror 1 and the rotating mirror group 2, so as to make the image clearer.

[0095] Optionally, the adjusting shim 7 in this application may be a plurality of shims of different thicknesses.

[0096] Specifically, the adjusting shim 7 is a ring with a notch and a certain thickness. The notch is a notch of equal diameter that goes straight through the hole in the middle of the ring. The diameter of the notch is equal to the diameter of the adjusting screw 8, so that the adjusting shim 7 can be easily replaced during the debugging process. At the same time, the outer diameter of the adjusting shim 7 is larger than the diameter of the connecting rod 6, so that the adjusting shim 7 can be firmly locked between the rear end face 313 and the connecting rod 6.

[0097] Example 2

[0098] A method for assembling and adjusting a device equipped with an optical system, wherein the device equipped with the optical system is the device equipped with an optical system described in Embodiment 1, specifically includes the following steps:

[0099] S1: The four rotating lenses, designed and assembled according to the parameters in Embodiment 1, are screwed together with the four rotating lens connecting through holes on the support flange 5 via their outer rotating lens external threads 44, thus fixing the rotating lens assembly 2 to the support flange 5. Since the axis of the rotating lens connecting through hole is set at a certain angle to the axis of the support flange 5, the axes of each rotating lens in the rotating lens assembly 2 are set at a specific angle. Specifically, the angle between the central axes of the first rotating lens 21 and the second rotating lens 22, and the third rotating lens 23 and the fourth rotating lens 24, which are horizontally arranged, is 16°. The angle between the central axes of the first rotating lens 21 and the third rotating lens 23, and the second rotating lens 22 and the fourth rotating lens 24, which are vertically adjacent, is 12°.

[0100] S2: Align one end of each of the four connecting rods 6 with the fixed internal threaded hole with the four fixed through holes 55 aligned with the edge of the support flange 5, so that the end face of that end contacts the fixed convex corner. Then, insert the four fixing screws 9 through the fixed through holes 55 from the arc side of the support flange 5 into the fixed internal threaded holes of the connecting rods 6. The two are then threadedly fixed together, and the support flange 5 and the connecting rods 6 are now fixed.

[0101] S3: Align the other ends of the four connecting rods 6 (i.e., the ends with the adjusting internal thread holes) with the four primary mirror threaded through holes 3131 on the rear end face 313 of the imaging primary mirror frame, and insert adjusting shims 7 between the connecting rods 6 and the rear end face 313. Then, pass the adjusting screw 8 from the other side of the rear end face 313 through the primary mirror threaded through hole 3131 and the middle through hole of the adjusting shim 7, and screw it into the adjusting internal thread hole at this end of the connecting rod 6, so that the adjusting shim 7, the connecting rod 6 and the rear end face 313 are in contact with each other, but not fixed. At this time, the imaging primary mirror structure 3 with the internal lens assembled is connected to the connecting rod 4 and is in an adjustable state. Preferably, the initial shim thickness is set to 2mm.

[0102] S4: Fine-tune the imaging primary mirror structure 3 to ensure the entire optical system can produce a clear image. Due to the cumulative effect of processing errors and assembly errors between components, the initial installation cannot achieve the required assembly precision between the assembled imaging primary mirror structure 3 and the assembled image-rotating lens structure 4. Therefore, with the image-rotating lens structure 4, the supporting flange 5, and the connecting rod 6 remaining relatively fixed, only the spatial position and orientation of the imaging primary mirror structure 3 need to be fine-tuned to ensure that the internal imaging primary mirror 1 can achieve the required imaging between it and the image-rotating mirror group 2. The fine-tuning of the imaging primary mirror structure 3 includes three degrees of freedom adjustment: radial axis adjustment, angular adjustment, and radial adjustment, specifically including the following steps:

[0103] S41: Axial adjustment is performed on the imaging primary mirror structure 3. This axial adjustment is made with the axis of the supporting flange 5 as the axis, that is, the displacement adjustment of the imaging primary mirror structure 3 along this axis. This axial adjustment is required when the four optical subsystems formed by the four rotating lenses and the imaging primary mirror 1 cannot form a clear image.

[0104] Specifically, the axial distance between the imaging primary mirror 1 and the rotating mirror group 2 is changed by uniformly altering the thickness of the adjusting shims 7. Removing or installing four adjusting shims 7 of equal thickness from the adjusting screw 8 through their notches is equivalent to synchronously adjusting the lengths of the four connecting rods 6, thereby adjusting the axial distance between the imaging primary mirror 1 and the rotating mirror group 2. Preferably, the minimum increase or decrease in the thickness of the adjusting shims 7 is 0.05 mm.

[0105] S42: Adjust the angle of the imaging primary mirror structure 3. This angle adjustment is performed by adjusting the angle between the axis of the imaging primary mirror structure 3 (i.e., the axis of the imaging primary mirror 1) and the axis of the supporting flange 5. After completing the axial adjustment in step S41, the axis of the imaging primary mirror structure 3 is coaxial with the axis of the supporting flange 5. However, if the image sharpness of the four rotating lenses and the four optical subsystems formed by the imaging primary mirror 1 is inconsistent, it indicates that angle adjustment is required. By making the positions of the four primary mirror threaded through holes at different orientations on the rear end face 313 of the imaging primary mirror structure 3 different from the thickness of the shims between each connecting rod 6, the axis of the imaging primary mirror structure 3 can be offset relative to the axis of the supporting flange 5, causing it to deflect in the rotation and pitch directions relative to the rotating mirror group 2, so that the two achieve the relative positional relationship required by the design, thereby making the image sharpness of the four rotating lenses and the four optical subsystems formed by the imaging primary mirror 1 consistent.

[0106] S43: Then, radial adjustment is performed on the imaging primary mirror structure 3. This radial adjustment is based on a plane perpendicular to the axis of the supporting flange 5 and passing through the center of the imaging primary mirror 1, and is performed on this reference plane. However, when the above two adjustment methods still cannot meet the requirements and cannot achieve clear imaging of the entire field of view, it indicates that radial adjustment is required. At this time, the adjusting screw 8 and the connecting support rod 6 are in the untightened state. Since the diameter of the four primary mirror threaded through holes 3131 on the rear end face 313 of the imaging primary mirror structure 3 is slightly larger than the diameter of the adjusting screw 6, when the adjusting screw 6 is not tightened, the imaging primary mirror structure 3 can make a slight radial movement along the above reference plane, which is equivalent to adjusting the relative radial position between the imaging primary mirror structure 3 (imaging primary mirror 1) and the rotating lens structure 4 (rotating mirror group 2). When a clear image is presented in the field of view, the adjusting screw 6 is tightened to fix the imaging primary mirror structure 3 and the connecting support rod 6, that is, the entire installation and adjustment of the assembly frame of an array optical system based on the imaging primary mirror is completed.

[0107] Example 3

[0108] A specific embodiment of the present invention discloses an imaging method using a device equipped with an optical system. The specific method steps according to the aforementioned device equipped with an optical system are as follows:

[0109] S1: The imaging primary mirror 1 performs a single imaging of the entire field of view scene to form an intermediate image plane. The imaging primary mirror 1 plays the role of gathering energy information of the entire field of view during this single imaging process, but the clarity of the intermediate image plane is poor.

[0110] S2: After visible light passes through the intermediate image plane, each rotating lens in the rotating mirror group 2 has an imaging field of view corresponding to a different local field of view region on the intermediate image plane. This means that in this embodiment, the four rotating lenses divide the intermediate image plane formed by the imaging master mirror 1 into four parts, and each rotating lens performs secondary imaging on the local intermediate image plane at its corresponding angular position. During this process, optical path optimization is mainly performed, and ultimately, the subsystem composed of the imaging master mirror 1 and the four rotating lenses forms four clear small image planes.

[0111] S3: The four rotating lenses in the rotating lens group 2 project their formed small image planes onto four cameras for image output. The four output images are then stitched together to restore the scene image of the entire field of view, thereby achieving the effect of expanding the field of view. The specific image output stitching process includes:

[0112] S31: The four rotating lenses in the rotating lens group 2 project their formed small image planes onto the photoelectric sensor surfaces of the four visible light cameras, and then the photoelectric sensors convert the light signals into electrical signals.

[0113] S32: After the electrical signal in step S31 undergoes analog-to-digital conversion, image enhancement, and image correction within the visible light camera, it is transmitted to the end user in the form of a digital image. Specifically, as shown... Figure 9 As shown, since the camera sensor is rectangular and the focal length of the imaging primary mirror and the rotating mirror group is 15.8mm, the image output by each visible light camera is also rectangular. Therefore, the subsystem formed by the imaging primary mirror 1 and each rotating lens can represent scene information of 20°×16°.

[0114] S33: The 20°×16° scene information represented by the subsystem formed by the imaging primary mirror 1 and each rotating lens described in step S32 is stitched together to form a 36°×28° large field-of-view image. Specifically, in this embodiment, the angle between the central axes of the first rotating lens 21 and the second rotating lens 22, and the central axes of the third rotating lens 23 and the fourth rotating lens 24, is set to 12°. The angle between the central axes of the first rotating lens 21 and the third rotating lens 23, and the central axes of the second rotating lens 22 and the fourth rotating lens 24, is set to 16°, forming a rectangular array. Therefore, the four subsystem digital images can be stitched together in a rectangular array to form a large field-of-view image. To improve stitching accuracy, each pair of adjacent subsystem digital images should have a certain field-of-view overlap in the docking area. In this embodiment, the field-of-view overlap area is set to 4°, so the images output by the four visible light cameras can be stitched together to form a 36°×28° large field-of-view image through the above settings.

[0115] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical system mounting frame characterized by comprising: The assembling frame comprises an imaging primary mirror structure (3), a turning image lens structure (4), a supporting flange (5) and a connecting rod (6); one end of the connecting rod (6) is fixedly connected with the supporting flange (5) through a fixing bolt (9), and the other end of the connecting rod (6) is connected with the imaging primary mirror structure (3) through an adjusting screw (8); the turning image lens structure (4) is screw-connected with the supporting flange (5); The supporting flange (5) is a spherical cap-shaped plate structure, four turning image lens connecting through holes are formed in the supporting flange (5), including a first turning image lens connecting through hole (51), a second turning image lens connecting through hole (52), a third turning image lens connecting through hole (53) and a fourth turning image lens connecting through hole (54); the distances from the four turning image lens connecting through holes to the axis of the supporting flange (5) are equal; the included angles between the central axes of the first and second turning image lens connecting through holes (51 and 52) and the central axes of the third and fourth turning image lens connecting through holes (53 and 54) are both 12°, and the included angles between the central axes of the first and third turning image lens connecting through holes (51 and 53) and the central axes of the second and fourth turning image lens connecting through holes (52 and 54) are both 16°; the turning image lenses arranged in the four turning image lens connecting through holes can be spliced to form a 36°*28° field of view.

2. The optical system mounting rack according to claim 1, wherein The imaging primary mirror structure (3) comprises an imaging primary mirror frame (31) and a threaded compression ring (32); two threaded compression rings (32) are arranged at the front end and the rear end of the imaging primary mirror frame (31) respectively, so that the optical system in the imaging primary mirror frame (31) is fixed in the imaging primary mirror frame (31) through the two threaded compression rings (32).

3. The optical system mounting frame according to claim 2, wherein The imaging primary mirror frame (31) comprises a front end face (311), a straight cylinder segment (312) and a rear end face (313), the front end face (311) and the rear end face (313) are fixedly arranged at the front side and the rear side of the straight cylinder segment (312) respectively, and the three are integrally formed and have a straight cylinder cavity penetrating through the whole imaging primary mirror frame (31) arranged in the middle.

4. The optical system mounting frame according to claim 3, wherein Four primary mirror threaded through holes (3131) are arranged at the edge of the rear end face (313); the diameters of the primary mirror threaded through holes (3131) are slightly larger than the diameter of the adjusting screw (8), and the imaging primary mirror structure (3) is adjusted in the radial direction in the later stage.

5. The optical system mounting frame according to any one of claims 1 to 4, characterized in that, The turning image lens structure (4) is provided with four; The turning image lens structure (4) comprises a turning image lens frame (41), a turning image lens threaded compression ring (42) and a metal spacer ring (43); the turning image lens threaded compression ring (42) is screw-connected with the turning image lens frame (41) through the external threads of the turning image lens threaded compression ring (42); the metal spacer ring (43) is arranged between adjacent independent lenses in the turning image lens.

6. The optical system mounting frame according to claim 5, wherein Four fixing through holes (55) are further formed in the supporting flange (5).

7. The optical system mounting frame according to claim 6, wherein The connecting rod (6) is provided with four, one end of the connecting rod is provided with a fixed internal thread hole, the other end is provided with an adjusting internal thread hole; The fixed bolt (9) is screwed through the fixed through hole (55) and the fixed internal thread hole of one end of the connecting rod (6); The adjusting screw (8) is screwed through the main mirror threaded hole (3131) and the adjusting internal thread hole of the other end of the connecting rod (6).

8. An apparatus provided with an optical system, comprising the optical system mounting frame according to any one of claims 1 to 7 and an optical system, characterized in that, The optical system comprises an imaging primary mirror (1) and a relay lens group (2); The imaging primary mirror (1) is used for transmitting the light of visible light to form a first imaging visible light real image plane, and the relay lens group (2) is used for transmitting the light of visible light to form a second imaging visible light real image plane.

9. The adjustment method of the device provided with the optical system, for adjusting the device provided with the optical system of claim 8, the specific steps are as follows: S1: each relay lens in the designed assembled relay lens group (2) is fixed to the support flange (5) respectively; S2: one end of the four connecting rods (6) is fixedly connected with the support flange (5); S3: the other end of the four connecting rods (6) is connected with the imaging primary mirror structure (3); S4: the imaging primary mirror structure (3) is fine-tuned, so that the whole optical system presents a clear image.

Images