Optical assembly and space debris wide-area detection optical system

Abstract

The embodiment of the present application provides an optical assembly and a space debris wide-area detection optical system, the optical assembly is coaxially provided with a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens in sequence along the light incidence direction, and light reaches a focal plane after passing through each lens; and the material of the lens is radiation-resistant optical glass. By taking the radiation-resistant optical glass as the material of the lens, the service life of the optical assembly in a space radiation environment is increased. Moreover, the relative aperture of the optical assembly is greater than 0.5, the field of view is greater than 35 degrees, the entrance pupil diameter is greater than 100 mm, and the spectral range is 450 nm-900 nm. It can be seen that the embodiment of the present application can increase the service life and the field of view of the optical assembly in the space radiation environment.

Description

Technical Field

[0001] This invention relates to the field of space optics technology, and in particular to an optical component and a wide-area optical system for detecting space debris. Background Technology

[0002] When a space debris wide-area detection optical system operates in orbit for extended periods, a large number of high-energy particles and gamma rays in space will pass through the ordinary optical glass in the system, interacting with its molecular structure and creating lattice defects such as color centers. These defects absorb visible light of specific wavelengths, causing the ordinary optical glass to gradually darken and its transmittance to decrease. Simultaneously, high-energy radiation alters the microstructure of the ordinary optical glass, leading to changes in its refractive index and the creation of density gradients. This results in a decline in the optical performance of the space debris wide-area detection optical system, making it impossible to guarantee consistent performance throughout its entire mission cycle and reducing its lifespan. Furthermore, current space debris wide-area detection optical systems have a relatively small field of view. Therefore, there is an urgent need to provide an optical component with a large field of view and long lifespan. Summary of the Invention

[0003] The purpose of this invention is to provide an optical component and a wide-area space debris detection optical system, thereby increasing the field of view and lifespan of the optical component used for wide-area space debris detection under space irradiation conditions. The specific technical solution is as follows:

[0004] In a first aspect of the present invention, an optical assembly is provided, wherein a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens are arranged coaxially along the incident direction of light, and light passes through each lens to reach the focal plane; the material of the lenses is radiation-resistant optical glass;

[0005] The refractive index n1 of the first lens, the refractive index n2 of the second lens, the refractive index n3 of the third lens, the refractive index n4 of the fourth lens, the refractive index n5 of the fifth lens, the refractive index n6 of the sixth lens, the refractive index n7 of the seventh lens, the refractive index n8 of the eighth lens, the refractive index n9 of the ninth lens, and the refractive index n of the tenth lens. 10 Satisfying the following conditions: 1.41≤n1≤1.52, 1.41≤n2≤1.48, 1.47≤n3≤1.58, 1.57≤n4≤1.71, 1.57≤n5≤1.68, 1.4≤n6≤1.5, 1.6≤n7≤1.7, 1.62≤n8≤1.71, 1.42≤n9≤1.56, 1.44≤n 10 ≤1.59;

[0006] The Abbe number v1 of the first lens, the Abbe number v2 of the second lens, the Abbe number v3 of the third lens, the Abbe number v4 of the fourth lens, the Abbe number v5 of the fifth lens, the Abbe number v6 of the sixth lens, the Abbe number v7 of the seventh lens, the Abbe number v8 of the eighth lens, the Abbe number v9 of the ninth lens, and the Abbe number v of the tenth lens. 10 Satisfying: 60≤v1≤70, 81≤v2≤96, 55≤v3≤66, 44≤v4≤56, 42≤v5≤56, 81≤v6≤96, 30≤v7≤36, 45≤v8≤56, 44≤v9≤76, 54≤v 10 ≤70;

[0007] The focal lengths f1, f2, f3, f4, f5, f6, f7, f8, f9, and f1 of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens are... 10 The focal length f of the optical component satisfies: -2.1f <f1<-1.79f,0.91f<f2<1.29f,5.9f<f3<8.2f,-4.9f<f4<-2.2f,2.5f<f5<4.3f,0.8f<f6<1.3f,-0.9f<f7<-0.73f,0.9f<f8<1.23f,-1.91f<f9<-1.78f,-1.11f<f 10 <-0.88f;

[0008] The incident surface radius of curvature R1 and the exit surface radius of curvature R2 of the first lens, the incident surface radius of curvature R3 and the exit surface radius of curvature R4 of the second lens, the incident surface radius of curvature R5 and the exit surface radius of curvature R6 of the third lens, the incident surface radius of curvature R7 and the exit surface radius of curvature R8 of the fourth lens, and the incident surface radius of curvature R9 and the exit surface radius of curvature R... 10 The radius of curvature R of the incident surface of the sixth lens 11 and the radius of curvature R of the exit surface 12 The radius of curvature R of the incident surface of the seventh lens 13 and the radius of curvature R of the exit surface 14 The incident surface radius of curvature R of the eighth lens 15 and the radius of curvature R of the exit surface 16 The incident surface radius of curvature R of the ninth lens 17 and the radius of curvature R of the exit surface 18 The radius of curvature R of the incident surface of the tenth lens 19Satisfy: -1.51f <R1<-1.32f,2.16f<R2<2.58f,0.71f<R3<0.92f,-0.9f<R4<-0.8f,1.71f<R5<2.32f,3.9f<R6<4.8f,0.57f<R7<0.73f,0.39f<R8<0.54f,0.45f<R9<0.57f,0.49f<R 10 <0.64f, 0.65f <R 11 <0.77f, -0.99f <R 12 <-0.75f, -1.72f <R 13 <-1.42f, 0.69f <R 14 <0.79f, 1.32f <R 15 <1.52f, -1.42f <R 16 <-1.22f, R 17 =-230.98mm, 5.12f <R 18 <5.92f, -0.6f <R 19 <-0.42f.

[0009] In one possible embodiment, the center thickness d1 of the first lens, the center thickness d2 of the second lens, the center thickness d3 of the third lens, the center thickness d4 of the fourth lens, the center thickness d5 of the fifth lens, the center thickness d6 of the sixth lens, the center thickness d7 of the seventh lens, the center thickness d8 of the eighth lens, the center thickness d9 of the ninth lens, and the center thickness d1 of the tenth lens are... 10 Satisfying the following conditions: 8mm≤d1≤17mm, 35mm≤d2≤55mm, 15mm≤d3≤25mm, 5mm≤d4≤15mm, 10mm≤d5≤20mm, 20mm≤d6≤40mm, 6mm≤d7≤16mm, 20mm≤d8≤40mm, 8mm≤d9≤17mm, 5mm≤d 10 ≤15mm.

[0010] In one possible embodiment, the spacing distance l between the first lens and the second lens is... 12 The distance l between the second lens and the third lens 23 The distance l between the third lens and the fourth lens 34 The distance l between the fourth lens and the fifth lens 45 The distance l between the fifth lens and the sixth lens 56 The distance l between the sixth lens and the seventh lens 67The distance l between the seventh lens and the eighth lens 78 The distance l between the eighth lens and the ninth lens 89 and the interval l between the ninth lens and the tenth lens 90 Satisfies: 9mm≤l 12 ≤16mm, 0.1mm≤l 23 ≤3mm, 0.1mm≤l 34 ≤3mm, 1mm≤l 45 ≤6mm, 1mm≤l 56 ≤10mm, 0.1mm≤l 67 ≤3mm, 30mm≤l 78 ≤43mm, 1mm≤l 89 ≤9mm, l 90 =50.30mm.

[0011] In one possible embodiment, the incident surface of the first lens, the incident surface of the second lens, the exit surface of the seventh lens, and the incident surface of the tenth lens are all high-order aspherical surfaces, and the third lens, the fourth lens, the fifth lens, the sixth lens, the eighth lens, and the ninth lens are all bispherical lenses.

[0012] In one possible embodiment, the first lens has an incident surface radius of curvature of -287.76 mm and an exit surface radius of curvature of 467.82 mm; the second lens has an incident surface radius of curvature of 167.22 mm and an exit surface radius of curvature of -170.59 mm; the third lens has an incident surface radius of curvature of 413.58 mm and an exit surface radius of curvature of 925.32 mm; the fourth lens has an incident surface radius of curvature of 126.11 mm and an exit surface radius of curvature of 97.53 mm; and the fifth lens has an incident surface radius of curvature of 98.18 mm and an exit surface radius of curvature of -170.59 mm. The incident surface radius of curvature of the sixth lens is 121.08 mm; the incident surface radius of curvature of the sixth lens is 143.52 mm, and the exit surface radius of curvature of the sixth lens is -163.59 mm; the incident surface radius of curvature of the seventh lens is -325.1 mm, and the exit surface radius of curvature of the seventh lens is 153.85 mm; the incident surface radius of curvature of the eighth lens is 285.27 mm, and the exit surface radius of curvature of the eighth lens is -276.76 mm; the incident surface radius of curvature of the ninth lens is -230.98 mm, and the exit surface radius of curvature of the ninth lens is 1123.51 mm; the incident surface radius of curvature of the tenth lens is -93.2 mm.

[0013] In one possible embodiment, the sagitta z of the incident surface of the first lens, the incident surface of the second lens, the exit surface of the seventh lens, and the incident surface of the tenth lens satisfies:

[0014] ;

[0015] Where c is the curvature of the aspherical surface, r is the diameter of the aspherical surface, K is the coefficient of the aspherical quadratic surface, and A, B, C, D, E, and F are the coefficients of each order of the aspherical surface.

[0016] When calculating the sagitta z of the incident surface of the first lens, K=0, A=-0.162628E-06, B=0.159297E-10, C=-0.219477E-14, D=0.175992E-18, E=-0.239114E-23, F=-0.356951E-27;

[0017] When calculating the sagitta z of the incident surface of the second lens, K=1.805789, A=-0.149509E-07, B=-0.239152E-10, C=0.145265E-14, D=-0.128029E-18;

[0018] When calculating the sagitta z of the exit surface of the seventh lens, K=0, A=0.131317E-06, B=-0.377234E-12, C=0.122189E-13, D=-0.458597E-17, E=0.102964E-20, F=-0.742911E-25;

[0019] When calculating the sagitta z of the incident surface of the tenth lens, K=-0.640777, A=-0.152114E-07, B=0.266798E-10, C=0.253318E-14, D=-0.261625E-18.

[0020] In one possible embodiment, the entrance pupil diameter D of the optical component satisfies: D>100mm.

[0021] In one possible embodiment, the entrance pupil diameter D of the optical component is 115 mm.

[0022] In one possible embodiment, the focal length f of the optical component is 200mm.

[0023] In a second aspect of the invention, a wide-area space debris detection optical system is provided, the space debris wide-area detection optical system comprising any of the optical components described in the first aspect above.

[0024] Beneficial effects of the embodiments of the present invention:

[0025] This invention provides an optical component and a wide-area space debris detection optical system. The optical component includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens arranged coaxially along the light incident direction. Light passes through each lens to reach the focal plane. By using radiation-resistant optical glass as the lens material, the transmittance and refractive index of the optical component remain relatively stable during long-term operation under space radiation conditions. This reduces or even avoids the decrease in the lifespan of the optical component due to changes in the transmittance and refractive index of the lenses, thereby increasing the lifespan of the optical component under space radiation conditions. Furthermore, by employing a negative optical power for the first lens, the aperture number (F-number) and field of view of the optical component are increased. The relative aperture of this optical component is greater than 0.5, the field of view is greater than 35°, and the spectral range is 450 nanometers (nm) to 900 nm. Therefore, this invention can increase the lifespan and field of view of the optical component under space radiation conditions.

[0026] Of course, implementing any product or method of the present invention does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0028] Figure 1 This is a schematic diagram of the structure of an optical component provided in an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the ±20° full field-of-view energy concentration curve of an optical component provided in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the field curvature and distortion curve of an optical component provided in an embodiment of the present invention. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art based on the present invention are within the scope of protection of the present invention.

[0032] At present, in order to avoid the decrease in the transmittance of the wide-area detection optical system for space debris caused by long-term exposure of ordinary optical glass to high-energy radiation, it is usually necessary to increase the aperture of the wide-area detection optical system for space debris or use complex radiation shielding measures to compensate for the performance attenuation of the wide-area detection optical system for space debris. However, the above methods will increase the weight, complexity and power consumption of the wide-area detection optical system for space debris.

[0033] Based on this, in order to increase the field of view of the optical component for wide-area detection of space debris, and while increasing the service life of the optical component in the space irradiation environment, reducing the weight, complexity and power consumption of the optical component, the embodiment of the present invention provides an optical component, see Figure 1 , Figure 1 is a schematic structural diagram of the optical component provided by the embodiment of the present invention. The optical component is coaxially provided with a first lens 101, a second lens 102, a third lens 103, a fourth lens 104, a fifth lens 105, a sixth lens 106, a seventh lens 107, an eighth lens 108, a ninth lens 109 and a tenth lens 110 in the order of the light incident direction, and the light passes through each lens to reach the focal plane; the material of the lens is radiation-resistant optical glass;

[0034] The refractive index n1 of the first lens 101 satisfies: 1.41 ≤ n1 ≤ 1.52; the Abbe number v1 of the first lens 101 satisfies: 60 ≤ v1 ≤ 70; the focal length f1 of the first lens 101 and the focal length f of the optical component satisfy: -2.1f < f1 < -1.79f; the incident surface curvature radius R1 of the first lens 101 satisfies: -1.51f < R1 < -1.32f, and the exit surface curvature radius R2 of the first lens 101 satisfies: 2.16f < R2 < 2.58f.

[0035] The refractive index n2 of the second lens 102 satisfies: 1.41 ≤ n2 ≤ 1.48; the Abbe number v2 of the second lens 102 satisfies: 81 ≤ v2 ≤ 96; the focal length f2 of the second lens 102 and the focal length f of the optical component satisfy: 0.91f < f2 < 1.29f; the incident surface curvature radius R3 of the second lens 102 satisfies: 0.71f < R3 < 0.92f, and the exit surface curvature radius R4 of the second lens 102 satisfies: -0.9f < R4 < -0.8f.

[0036] The refractive index n3 of the third lens 103 satisfies: 1.47 ≤ n3 ≤ 1.58; the Abbe number v3 of the third lens 103 satisfies: 55 ≤ v3 ≤ 66; the focal length f3 of the third lens 103 and the focal length f of the optical component satisfy: 5.9f < f3 < 8.2f; the incident surface curvature radius R5 of the third lens 103 satisfies: 1.71f < R5 < 2.32f, and the exit surface curvature radius R6 of the third lens 103 satisfies: 3.9f < R6 < 4.8f.

[0037] The refractive index n4 of the fourth lens 104 satisfies: 1.57 ≤ n4 ≤ 1.71; the Abbe number v4 of the fourth lens 104 satisfies: 44 ≤ v4 ≤ 56; the focal length f4 of the fourth lens 104 and the focal length f of the optical component satisfy: -4.9f < f4 < -2.2f; the radius of curvature R7 of the incident surface of the fourth lens 104 satisfies: 0.57f < R7 < 0.73f, and the radius of curvature R8 of the exit surface of the fourth lens 104 satisfies: 0.39f < R8 < 0.54f.

[0038] The refractive index n5 of the fifth lens 105 satisfies: 1.57 ≤ n5 ≤ 1.68; the Abbe number v5 of the fifth lens 105 satisfies: 42 ≤ v5 ≤ 56; the focal length f5 of the fifth lens 105 and the focal length f of the optical component satisfy: 2.5f < f5 < 4.3f; the radius of curvature R9 of the incident surface of the fifth lens 105 satisfies: 0.45f < R9 < 0.57f, and the radius of curvature R 10 satisfies: 0.49f < R 10 < 0.64f.

[0039] The refractive index n6 of the sixth lens 106 satisfies: 1.4 ≤ n6 ≤ 1.5; the Abbe number v6 of the sixth lens 106 satisfies: 81 ≤ v6 ≤ 96; the focal length f6 of the sixth lens 106 and the focal length f of the optical component satisfy: 0.8f < f6 < 1.3f; the radius of curvature R 11 satisfies: 0.65f < R 11 < 0.77f, and the radius of curvature R of the exit surface of the sixth lens 106 12 satisfies: -0.99f < R 12 < -0.75f.

[0040] The refractive index n7 of the seventh lens 107 satisfies: 1.6 ≤ n7 ≤ 1.7; the Abbe number v7 of the seventh lens 107 satisfies: 30 ≤ v7 ≤ 36; the focal length f7 of the seventh lens 107 and the focal length f of the optical component satisfy: -0.9f < f7 < -0.73f; the radius of curvature R of the incident surface of the seventh lens 107 13 satisfies: -1.72f < R 13 < -1.42f, and the radius of curvature R of the exit surface of the seventh lens 107 14 satisfies: 0.69f < R 14 < 0.79f.

[0041] The refractive index n8 of the eighth lens 108 satisfies: 1.62 ≤ n8 ≤ 1.71; the Abbe number v8 of the eighth lens 108 satisfies: 45 ≤ v8 ≤ 56; the focal length f8 of the eighth lens 108 and the focal length f of the optical component satisfy: 0.9f < f8 < 1.23f; the radius of curvature R of the incident surface of the eighth lens 108 15 satisfies: 1.32f < R 15 < 1.52f, the radius of curvature R of the exit surface of the eighth lens 108 16 satisfies: -1.42f < R 16 < -1.22f.

[0042] The refractive index n9 of the ninth lens 109 satisfies: 1.42 ≤ n9 ≤ 1.56; the Abbe number v9 of the ninth lens 109 satisfies: 44 ≤ v9 ≤ 76; the focal length f9 of the ninth lens 109 and the focal length f of the optical component satisfy: -1.91f < f9 < -1.78f; the radius of curvature R of the incident surface of the ninth lens 109 17 satisfies: R 17 = -230.98 mm, the radius of curvature R of the exit surface of the ninth lens 109 18 satisfies: 5.12f < R 18 < 5.92f.

[0043] The refractive index n of the tenth lens 110 10 satisfies: 1.44 ≤ n 10 ≤ 1.59; the Abbe number v of the tenth lens 110 10 satisfies: 54 ≤ v 10 ≤ 70; the focal length f of the tenth lens 110 10 and the focal length f of the optical component satisfy: -1.11f < f 10 < -0.88f; the radius of curvature R of the incident surface of the tenth lens 110 19 satisfies: -0.6f < R 19 < -0.42f.

[0044] Among them, the refractive index reflects the deflection ability of the lens for light, and the Abbe number is a parameter used to measure the chromatic dispersion degree of the lens. A lens usually has an exit surface and an incident surface. The incident surface refers to the surface before the light enters the lens, and the exit surface refers to the surface where the light finally leaves the lens after refraction inside the lens. The positive and negative signs of the radius of curvature of a spherical lens are used to reflect the bending direction and shape characteristics of the lens surface. A positive radius of curvature of the lens surface indicates that the surface is a convex surface, that is, the center of the spherical surface is located on the right side of the vertex of the spherical surface, and a negative radius of curvature of the lens surface indicates that the surface is a concave surface, that is, the center of the spherical surface is located on the left side of the vertex of the spherical surface.

[0045] Applying the above embodiments, on one hand, the optical component is coaxially arranged with a first lens 101, a second lens 102, a third lens 103, a fourth lens 104, a fifth lens 105, a sixth lens 106, a seventh lens 107, an eighth lens 108, a ninth lens 109, and a tenth lens 110 along the incident direction of light, and light reaches the focal plane after passing through each lens. By using radiation-resistant optical glass as the lens material, the transmittance and refractive index of the optical component are ensured to remain relatively stable when working in a space radiation environment for a long time, reducing or even avoiding the decrease in the lifespan of the optical component due to changes in the transmittance and refractive index of the lenses, thereby increasing the lifespan of the optical component under space radiation conditions. Furthermore, by using a negative optical power for the first lens 101, the aperture number (i.e., F-number) and field of view of the optical component are increased. The relative aperture of this optical component is greater than 0.5, the field of view is greater than 35°, and the spectral range is 450 nanometers (nm) to 900 nm. It can be seen that the embodiments of the present invention can increase the lifespan and field of view of the optical component under space radiation conditions.

[0046] On the other hand, by employing a negative optical power in the tenth lens 110, the field curvature of the large field-of-view optical component can be corrected, enabling the large field-of-view optical component to achieve uniform and clear imaging from the center to the edge. This increases the field of view of the optical component while improving its geometric accuracy and observation efficiency. Furthermore, this embodiment of the invention can increase the lifespan of the optical component under space irradiation conditions simply by adjusting the lens material, without increasing the aperture of the optical component or using complex radiation shielding measures. Therefore, it does not lead to an increase in the weight, complexity, or power consumption of the optical component. Thus, this embodiment of the invention can increase the lifespan of the optical component under space irradiation conditions while reducing its weight, complexity, and power consumption.

[0047] To reduce the overall weight and volume of the optical components and minimize the impact of object distance variations on image quality, in one possible implementation, the center thickness of each lens and the spacing between lenses need to meet the following requirements:

[0048] The center thickness d1 of the first lens 101 satisfies: 8mm ≤ d1 ≤ 17mm; the center thickness d2 of the second lens 102 satisfies: 35mm ≤ d2 ≤ 55mm; the center thickness d3 of the third lens 103 satisfies: 15mm ≤ d3 ≤ 25mm; the center thickness d4 of the fourth lens 104 satisfies: 5mm ≤ d4 ≤ 15mm; the center thickness d5 of the fifth lens 105 satisfies: 10mm ≤ d5 ≤ 20mm; the center thickness d6 of the sixth lens 106 satisfies: 20mm ≤ d6 ≤ 40mm; the center thickness d7 of the seventh lens 107 satisfies: 6mm ≤ d7 ≤ 16mm; the center thickness d8 of the eighth lens 108 satisfies: 20mm ≤ d8 ≤ 40mm; the center thickness d9 of the ninth lens 109 satisfies: 8mm ≤ d9 ≤ 17mm; the center thickness d1 of the tenth lens 110 satisfies: 8mm ≤ d9 ≤ 17mm; the center thickness d1 of the tenth lens 110 satisfies: 8mm ≤ d1 ≤ 17mm; the center thickness d1 of the second lens 102 satisfies: 35mm ≤ d2 ≤ 55mm; the center thickness d3 of the third lens 103 satisfies: 15mm ≤ d3 ≤ 25mm; the center thickness d4 of the fourth lens 104 satisfies: 5mm ≤ d4 ≤ 15mm; the center thickness d5 of the fifth lens 105 satisfies: 10mm ≤ 10 Satisfies: 5mm≤d 10 ≤15mm.

[0049] The distance l between the first lens 101 and the second lens 102 12 Satisfies: 9mm≤l 12 ≤16mm; the distance l between the second lens 102 and the third lens 103 23 Satisfy: 0.1mm≤l 23 ≤3mm; the distance l between the third lens 103 and the fourth lens 104 34 Satisfy: 0.1mm≤l 34 ≤3mm; the spacing between the fourth lens 104 and the fifth lens 105 is l 45 Satisfy: 1mm≤l 45 ≤6mm; the spacing l between the fifth lens 105 and the sixth lens 106 56 Satisfy: 1mm≤l 56 ≤10mm; the spacing l between the sixth lens 106 and the seventh lens 107 67 Satisfy: 0.1mm≤l 67 ≤3mm; the spacing between the seventh lens 107 and the eighth lens 108 is l 78 Satisfies: 30mm≤l 78 ≤43mm; the interval between the eighth lens 108 and the ninth lens 109 is l 89 Satisfy: 1mm≤l 89 ≤9mm; the spacing l between the ninth lens 109 and the tenth lens 110 90 Satisfy: l 90 =50.30mm.

[0050] In order to correct optical component aberrations and ensure that the optical components maintain consistent imaging quality throughout the entire field of view (from the center field of view to the edge field of view), in one possible embodiment, the incident surfaces of the first lens 101, the second lens 102, the seventh lens 107, and the tenth lens 110 are all high-order aspherical surfaces, and the third lens 103, the fourth lens 104, the fifth lens 105, the sixth lens 106, the eighth lens 108, and the ninth lens 109 are all bispherical lenses.

[0051] By applying the above embodiments, aspherical correction of optical component aberrations is used, so that the diameter of 80% of the circle of confusion in the 40° field of view of the optical component is controlled within the range of 20 micrometers (μm) to 30 μm, so that the optical component can maintain consistent imaging quality throughout the entire field of view.

[0052] The incident surfaces of the first lens 101, the second lens 102, the seventh lens 107, and the tenth lens 110 are all high-order aspherical surfaces. Their function is to balance the primary and high-order aberrations of the optical components. Their sagitta z satisfies the following formula (1):

[0053]

[0054] Where c is the curvature of the aspherical surface, r is the diameter of the aspherical surface, K is the coefficient of the aspherical quadratic surface, and A, B, C, D, E, and F are the coefficients of each order of the aspherical surface.

[0055] When calculating the sagitta z of the incident surface of the first lens 101, K=0, A=-0.162628E-06, B=0.159297E-10, C=-0.219477E-14, D=0.175992E-18, E=-0.239114E-23, F=-0.356951E-27.

[0056] When calculating the sagitta z of the incident surface of the second lens 102, K=1.805789, A=-0.149509E-07, B=-0.239152E-10, C=0.145265E-14, D=-0.128029E-18.

[0057] When calculating the sagitta z of the exit surface of the seventh lens 107, K=0, A=0.131317E-06, B=-0.377234E-12, C=0.122189E-13, D=-0.458597E-17, E=0.102964E-20, F=-0.742911E-25.

[0058] When calculating the sagitta z of the incident surface of the tenth lens 110, K=-0.640777, A=-0.152114E-07, B=0.266798E-10, C=0.253318E-14, D=-0.261625E-18.

[0059] It is understandable that the aperture determines the physical range of light that the optical component can receive, while the entrance pupil diameter determines the angular range and light-gathering capability of the optical component. Based on this, in order to improve the observation capability of the optical component, in one possible embodiment, the entrance pupil diameter D of the optical component satisfies: D>100mm.

[0060] In one possible embodiment, the entrance pupil diameter D of the optical component is 115 mm.

[0061] In one possible embodiment, the focal length f of the optical component is 200mm.

[0062] In one specific embodiment, the parameters of each lens in the optical assembly provided by the present invention are shown in Table 1:

[0063]

[0064] As shown in Table 1, all lenses are made of radiation-resistant optical glass.

[0065] The first lens 101 has an incident surface radius of curvature of -287.76 mm and an exit surface radius of curvature of 467.82 mm; the second lens 102 has an incident surface radius of curvature of 167.22 mm and an exit surface radius of curvature of -170.59 mm; the third lens 103 has an incident surface radius of curvature of 413.58 mm and an exit surface radius of curvature of 925.32 mm; the fourth lens 104 has an incident surface radius of curvature of 126.11 mm and an exit surface radius of curvature of 97.53 mm; the fifth lens 105 has an incident surface radius of curvature of 98.18 mm and an exit surface radius of curvature of 121.08 mm; the sixth lens 106 has an incident surface radius of curvature of -287.76 mm and an exit surface radius of curvature of -170.59 ... The radius of curvature of the surface of the sixth lens 106 is 143.52 mm, and the radius of curvature of the exit surface of the seventh lens 107 is -163.59 mm; the radius of curvature of the incident surface of the seventh lens 107 is -325.1 mm, and the radius of curvature of the exit surface of the seventh lens 107 is 153.85 mm; the radius of curvature of the incident surface of the eighth lens 108 is 285.27 mm, and the radius of curvature of the exit surface of the eighth lens 108 is -276.76 mm; the radius of curvature of the incident surface of the ninth lens 109 is -230.98 mm, and the radius of curvature of the exit surface of the ninth lens 109 is 1123.51 mm; the radius of curvature of the incident surface of the tenth lens 110 is -93.2 mm, and the radius of curvature of the exit surface of the tenth lens 110 is infinity, that is, the exit surface of the tenth lens 110 is a plane.

[0066] In Table 1, the interval refers to the distance traveled along the optical axis when light travels from the current surface (e.g., surface 1) to the next surface (e.g., surface 2). For example, the interval between the incident surface and the exit surface of the first lens 101 is 13.89 mm, meaning that light travels 13.89 mm from the incident surface of the first lens 101 to reach the exit surface. The interval between the exit surface of the first lens 101 and the incident surface of the second lens 102 is 13.77 mm, meaning that light travels 13.77 mm from the exit surface of the first lens 101 to reach the incident surface of the second lens 102, and so on. The interval between the exit surface of the tenth lens 110 and the focal plane is 0 mm, meaning that light exiting the exit surface of the tenth lens 110 reaches the focal plane directly without further propagation.

[0067] In Table 1, the values ​​under the "Radiation-resistant Optical Glass" item for the first lens 101 are the refractive index and Abbe number of the lens. The value "abc.ABC" means "Radiation-resistant optical glass with a refractive index of 1.abc and an Abbe number of AB.C". For example, the first lens 101 is radiation-resistant optical glass with a refractive index of 1.458 and an Abbe number of 63.8, and the second lens 102 is radiation-resistant optical glass with a refractive index of 1.433 and an Abbe number of 81.2. These are not exhaustive examples.

[0068] Figure 2 This is a schematic diagram of the ±20° full field-of-view energy concentration curve of an optical component provided in an embodiment of the present invention. Figure 2 Different curves correspond to different field of view angles. Figure 2 The field of view angles corresponding to the curves in the left figure are 0°, 4°, and 9°, respectively; Figure 2 The field of view corresponding to each curve in the right figure is 12°, 16°, and 20°, respectively. Figure 2 The horizontal axis represents the diameter of the circle enclosing the energy (in millimeters), and the vertical axis represents the proportion of the total energy enclosed within the circle (between 0 and 1). Figure 2 The geometric loop energy within. From Figure 2 It can be seen that, within a ±20° field of view, the diameter of the circle of confusion corresponding to 80% of the energy of the optical component provided in this embodiment of the invention needs to fall between 20μm and 30μm.

[0069] Figure 3 This is a schematic diagram of the field curvature and distortion curve of an optical component provided in an embodiment of the present invention. See also... Figure 3 , Figure 3 The left figure shows the field curvature curve of the optical component provided in an embodiment of the present invention (i.e. Figure 3 A schematic diagram of the pixel field curve (in the image), with the horizontal axis representing the focal point in millimeters and the vertical axis representing the angle in degrees. Figure 3 The right figure is a schematic diagram of the distortion curve of the optical component provided in an embodiment of the present invention. The horizontal axis represents the distortion percentage (%), and the vertical axis represents the angle, in degrees. Figure 3 It can be seen that the optical component provided in this embodiment of the invention has a spectral range of 450nm-900nm.

[0070] Corresponding to the aforementioned optical components, this embodiment of the invention also provides a space debris wide-area detection optical system, which includes the optical components in any of the aforementioned embodiments.

[0071] Applying the above embodiments, on the one hand, the space debris wide-area detection optical system is coaxially arranged with a first lens 101, a second lens 102, a third lens 103, a fourth lens 104, a fifth lens 105, a sixth lens 106, a seventh lens 107, an eighth lens 108, a ninth lens 109, and a tenth lens 110 along the incident direction of light, so that light reaches the focal plane after passing through each lens. By using radiation-resistant optical glass as the lens material, the transmittance and refractive index of the space debris wide-area detection optical system are kept relatively stable when working in the space radiation environment for a long time, reducing or even avoiding the situation where the lifespan of the space debris wide-area detection optical system is reduced due to changes in the transmittance and refractive index of the lenses, thereby increasing the lifespan of the space debris wide-area detection optical system under the space radiation environment. Furthermore, by using negative optical power in the first lens 101, the aperture number (i.e., F-number) and field of view of the space debris wide-area detection optical system are increased. The relative aperture of this space debris wide-area detection optical system is greater than 0.5, the field of view is greater than 35°, and the spectral range is 450nm-900nm. It is evident that the embodiments of the present invention can increase the service life and field of view of the optical system for wide-area detection of space debris under space irradiation environment.

[0072] On the other hand, by employing a negative optical power in the tenth lens 110, the field curvature of the wide-field-of-view space debris detection optical system can be corrected, enabling the system to achieve uniform and clear imaging from the center to the edge. This increases the field of view of the system while improving its geometric accuracy and observation efficiency. Furthermore, this embodiment of the invention increases the lifespan of the space debris detection optical system under space irradiation conditions simply by adjusting the lens material, without increasing the aperture or using complex radiation shielding measures. Therefore, it avoids increasing the weight, complexity, and power consumption of the system. Thus, this embodiment of the invention can increase the lifespan of the space debris detection optical system under space irradiation conditions while reducing its weight, complexity, and power consumption.

[0073] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 limitations, 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 said element.

[0074] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. In particular, the embodiment of the space debris wide-area detection optical system is relatively simple in description because it is fundamentally similar to the optical component embodiment; relevant parts can be referred to in the description of the optical component embodiment.

[0075] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. An optical component, characterized in that, The optical assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens arranged coaxially along the incident direction of light. Light passes through each lens to reach the focal plane. The lenses are made of radiation-resistant optical glass. The optical components with optical refractive power are only the aforementioned ten lenses. The refractive index n1 of the first lens, the refractive index n2 of the second lens, the refractive index n3 of the third lens, the refractive index n4 of the fourth lens, the refractive index n5 of the fifth lens, the refractive index n6 of the sixth lens, the refractive index n7 of the seventh lens, the refractive index n8 of the eighth lens, the refractive index n9 of the ninth lens, and the refractive index n of the tenth lens. 10 Satisfying the following conditions: 1.41≤n1≤1.52, 1.41≤n2≤1.48, 1.47≤n3≤1.58, 1.57≤n4≤1.71, 1.57≤n5≤1.68, 1.4≤n6≤1.5, 1.6≤n7≤1.7, 1.62≤n8≤1.71, 1.42≤n9≤1.56, 1.44≤n 10 ≤1.59; The Abbe number v1 of the first lens, the Abbe number v2 of the second lens, the Abbe number v3 of the third lens, the Abbe number v4 of the fourth lens, the Abbe number v5 of the fifth lens, the Abbe number v6 of the sixth lens, the Abbe number v7 of the seventh lens, the Abbe number v8 of the eighth lens, the Abbe number v9 of the ninth lens, and the Abbe number v of the tenth lens. 10 Satisfying: 60≤v1≤70, 81≤v2≤96, 55≤v3≤66, 44≤v4≤56, 42≤v5≤56, 81≤v6≤96, 30≤v7≤36, 45≤v8≤56, 44≤v9≤76, 54≤v 10 ≤70; The focal lengths f1, f2, f3, f4, f5, f6, f7, f8, f9, and f1 of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens are... 10 The focal length f of the optical component satisfies: -2.1f <f1<-1.79f,0.91f<f2<1.29f,5.9f<f3<8.2f,-4.9f<f4<-2.2f,2.5f<f5<4.3f,0.8f<f6<1.3f,-0.9f<f7<-0.73f,0.9f<f8<1.23f,-1.91f<f9<-1.78f,-1.11f<f 10 <-0.88f; The incident surface radius of curvature R1 and the exit surface radius of curvature R2 of the first lens, the incident surface radius of curvature R3 and the exit surface radius of curvature R4 of the second lens, the incident surface radius of curvature R5 and the exit surface radius of curvature R6 of the third lens, the incident surface radius of curvature R7 and the exit surface radius of curvature R8 of the fourth lens, and the incident surface radius of curvature R9 and the exit surface radius of curvature R... 10 The radius of curvature R of the incident surface of the sixth lens 11 and the radius of curvature R of the exit surface 12 The radius of curvature R of the incident surface of the seventh lens 13 and the radius of curvature R of the exit surface 14 The radius of curvature R of the incident surface of the eighth lens 15 and the radius of curvature R of the exit surface 16 The radius of curvature R of the incident surface of the ninth lens 17 and the radius of curvature R of the exit surface 18 The incident surface radius of curvature R of the tenth lens 19 Satisfy: -1.51f <R1<-1.32f,2.16f<R2<2.58f,0.71f<R3<0.92f,-0.9f<R4<-0.8f,1.71f<R5<2.32f,3.9f<R6<4.8f,0.57f<R7<0.73f,0.39f<R8<0.54f,0.45f<R9<0.57f,0.49f<R 10 <0.64f, 0.65f <R 11 <0.77f, -0.99f <R 12 <-0.75f, -1.72f <R 13 <-1.42f, 0.69f <R 14 <0.79f, 1.32f <R 15 <1.52f, -1.42f <R 16 <-1.22f, R 17 =-230.98mm, 5.12f <R 18 <5.92f, -0.6f <R 19 <-0.42f.

2. The optical component according to claim 1, characterized in that, The center thickness d1 of the first lens, the center thickness d2 of the second lens, the center thickness d3 of the third lens, the center thickness d4 of the fourth lens, the center thickness d5 of the fifth lens, the center thickness d6 of the sixth lens, the center thickness d7 of the seventh lens, the center thickness d8 of the eighth lens, the center thickness d9 of the ninth lens, and the center thickness d of the tenth lens 10 Satisfying the following conditions: 8mm≤d1≤17mm, 35mm≤d2≤55mm, 15mm≤d3≤25mm, 5mm≤d4≤15mm, 10mm≤d5≤20mm, 20mm≤d6≤40mm, 6mm≤d7≤16mm, 20mm≤d8≤40mm, 8mm≤d9≤17mm, 5mm≤d 10 ≤15mm.

3. The optical component according to claim 1, characterized in that, The distance l between the first lens and the second lens 12 The distance l between the second lens and the third lens 23 The distance l between the third lens and the fourth lens 34 The distance l between the fourth lens and the fifth lens 45 The distance l between the fifth lens and the sixth lens 56 The distance l between the sixth lens and the seventh lens 67 The distance l between the seventh lens and the eighth lens 78 The distance l between the eighth lens and the ninth lens 89 and the interval l between the ninth lens and the tenth lens 90 Satisfies: 9mm≤l 12 ≤16mm, 0.1mm≤l 23 ≤3mm, 0.1mm≤l 34 ≤3mm, 1mm≤l 45 ≤6mm, 1mm≤l 56 ≤10mm, 0.1mm≤l 67 ≤3mm, 30mm≤l 78 ≤43mm, 1mm≤l 89 ≤9mm, l 90 =50.30mm.

4. The optical component according to claim 1, characterized in that, The incident surface of the first lens, the incident surface of the second lens, the exit surface of the seventh lens, and the incident surface of the tenth lens are all high-order aspherical surfaces, and the third lens, the fourth lens, the fifth lens, the sixth lens, the eighth lens, and the ninth lens are all bispherical lenses.

5. The optical component according to claim 4, characterized in that, The first lens has an incident surface radius of curvature of -287.76 mm and an exit surface radius of curvature of 467.82 mm; the second lens has an incident surface radius of curvature of 167.22 mm and an exit surface radius of curvature of -170.59 mm; the third lens has an incident surface radius of curvature of 413.58 mm and an exit surface radius of curvature of 925.32 mm; the fourth lens has an incident surface radius of curvature of 126.11 mm and an exit surface radius of curvature of 97.53 mm; the fifth lens has an incident surface radius of curvature of 98.18 mm. The radius of curvature of the exit surface of the fifth lens is 121.08 mm; the radius of curvature of the incident surface of the sixth lens is 143.52 mm, and the radius of curvature of the exit surface of the sixth lens is -163.59 mm; the radius of curvature of the incident surface of the seventh lens is -325.1 mm, and the radius of curvature of the exit surface of the seventh lens is 153.85 mm; the radius of curvature of the incident surface of the eighth lens is 285.27 mm, and the radius of curvature of the exit surface of the eighth lens is -276.76 mm; the radius of curvature of the exit surface of the ninth lens is 1123.51 mm; and the radius of curvature of the incident surface of the tenth lens is -93.2 mm.

6. The optical component according to claim 4, characterized in that, The incident surface of the first lens, the incident surface of the second lens, the exit surface of the seventh lens, and the incident surface of the tenth lens have the following sagittal height z: ; Where c is the curvature of the aspherical surface, r is the diameter of the aspherical surface, K is the coefficient of the aspherical quadratic surface, and A, B, C, D, E, and F are the coefficients of each order of the aspherical surface. When calculating the sagitta z of the incident surface of the first lens, K=0, A=-0.162628E-06, B=0.159297E-10, C=-0.219477E-14, D=0.175992E-18, E=-0.239114E-23, F=-0.356951E-27; When calculating the sagitta z of the incident surface of the second lens, K=1.805789, A=-0.149509E-07, B=-0.239152E-10, C=0.145265E-14, D=-0.128029E-18; When calculating the sagitta z of the exit surface of the seventh lens, K=0, A=0.131317E-06, B=-0.377234E-12, C=0.122189E-13, D=-0.458597E-17, E=0.102964E-20, F=-0.742911E-25; When calculating the sagitta z of the incident surface of the tenth lens, K=-0.640777, A=-0.152114E-07, B=0.266798E-10, C=0.253318E-14, D=-0.261625E-18.

7. The optical component according to claim 1, characterized in that, The entrance pupil diameter D of the optical component satisfies: D>100mm.

8. The optical component according to claim 1, characterized in that, The entrance pupil diameter D of the optical component is 115 mm.

9. The optical component according to claim 1, characterized in that, The focal length f of the optical component is 200mm.

10. A wide-area optical system for detecting space debris, characterized in that, The space debris wide-area detection optical system includes the optical components described in any one of claims 1-9.

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