A 4K high-resolution 230-degree ultra-wide temperature athermalization optical system based on a global lens

Abstract

A kind of 4K high-resolution ultra-wide temperature (230℃) athermalization optical system based on global lens, characterized by: optical system protection window, first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens, detector protection window and detector photosurface (image plane) are sequentially arranged from outside to inside in the direction of light propagation.The protection window, first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens, detector protection window and detector photosurface (image plane) are coaxially arranged.Optical system is used to receive visible light reflection information inherent to target and background, and converge to detector photosurface, realize photoelectric conversion, detector uses 4K high-resolution small pixel detector, its resolution is 4096x4096, pixel size is 2.5 μm, with higher sensitivity and smaller spatial resolution, under complex weather conditions in daytime, target detection, identification and accurate positioning can be realized, clear imaging can be realized in-110℃~+120℃ working temperature range, with strong environmental adaptability, can be applied to optical imaging detection field, also can be used in high and low temperature gas detection, industrial multispectral imaging analysis and nondestructive testing etc.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of optical imaging technology, and particularly relates to a 4K high-resolution super-wide-temperature (230 DEG C) athermal optical system based on a global lens. BACKGROUND

[0002] With the rapid development of detector technology, imaging detection systems with high resolution, wide working temperature range and strong environmental adaptability play an increasingly important role in scientific technology, national economy, national defense and military fields. The application is based on a 4K high-resolution detector, and designs a visible light 4K high-resolution super-wide-temperature athermal optical system. The system has excellent imaging quality, strong light collection capacity and good environmental adaptability in a working temperature range of -110 DEG C to +120 DEG C. The system has the technical characteristics of simple structure, easy assembly and adjustment, high reliability, low cost, good processing technology and high yield, and can be widely applied to fields of space optical remote sensing, ground target tracking detection, optical imaging guidance, astronomical observation, high-temperature gas analysis and nondestructive testing, civil safety monitoring and the like, and has broad application prospect and great economic benefits. SUMMARY

[0003] The application aims to realize the design of a high-resolution, low-cost, super-wide-temperature athermal visible light optical system of a high-resolution, super-wide-temperature imaging detection system, and provides a 4K high-resolution super-wide-temperature (230 DEG C) athermal optical system based on a global lens.

[0004] To achieve the above object, the technical scheme adopted by the application is as follows:

[0005] A kind of 4K high-resolution ultra-wide temperature (230 DEG C) athermal optical system based on global lens, it is characterized in that: optical system protection window, first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens, detector protection window and detector photosurface (image surface) are sequentially arranged from outside to inside in the direction of light propagation.The optical system protection window, first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens, detector protection window and detector photosurface (image surface) are coaxially arranged.Optical system is used to receive the visible light reflection information inherent to target and background, and converge to detector photosurface, realize photoelectric conversion, detector uses 4K high-resolution small pixel detector, its resolution is 4096×4096, pixel size is 2.5 μm, with higher sensitivity and smaller spatial resolution, in the daytime complex weather conditions, target detection, identification and accurate positioning can be realized, clear imaging can be realized in-110 DEG C~+120 DEG C operating temperature range, with strong environmental adaptability, can be applied to optical imaging detection field, also can be used in high and low temperature gas detection, industrial multispectral imaging analysis and nondestructive testing etc. civilian product field.

[0006] Further, the optical system protection window, detector protection window is plane lens, first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens are all spherical lenses.

[0007] Further, the optical system protection window inner and outer surfaces are both flat, thickness is 6mm; the first lens outer surface radius of curvature is 79.54mm, inner surface radius of curvature is 86.91mm, thickness is 13.5mm; the second lens outer surface radius of curvature is 129.24mm, inner surface radius of curvature is 57.35mm, thickness is 14mm; the third lens outer surface radius of curvature is 67.89mm, inner surface radius of curvature is -381.6mm, thickness is 12.35mm; the fourth lens outer surface radius of curvature is 44.28mm, inner surface radius of curvature is 1167.76mm, thickness is 5.05mm; the fifth lens outer surface radius of curvature is -164.68mm, inner surface radius of curvature is 39.26mm, thickness is 8.15mm; the sixth lens outer surface radius of curvature is 39.26mm, inner surface radius of curvature is -124.25mm, thickness is 6.9mm; the seventh lens outer surface radius of curvature is -362.95mm, inner surface radius of curvature is 59.69mm, thickness is 4.1mm; the eighth lens outer surface radius of curvature is 89.43mm, inner surface radius of curvature is -91.09mm, thickness is 10.4mm; the ninth lens outer surface radius of curvature is -33.49mm, inner surface radius of curvature is -156.22mm, thickness is 3.5mm; the detector protection window inner and outer surfaces are both flat, thickness is 1mm.

[0008] Further, the optical system protection window and the first lens air gap is 3mm; the first lens and the second lens air gap is 6mm; the second lens and the third lens air gap is 1.6mm; the third lens and the fourth lens air gap is 1mm; the fourth lens and the fifth lens air gap is 2.7mm; the fifth lens and the sixth lens are bonded by optical glue; the sixth lens and the seventh lens air gap is 0.3mm; the seventh lens and the eighth lens air gap is 20.5mm; the eighth lens and the ninth lens air gap is 24.1mm; the ninth lens and the detector protection window air gap is 9.66mm; the detector protection window and the detector photosensitive surface (image plane) distance is 1mm.

[0009] Further, the optical system protection window and the detector protection window are made of H-K9L material; the first lens is made of H-ZF6 material; the second lens is made of H-F4 material; the third lens is made of H-ZK9B material; the fourth lens is made of H-BAK7 material; the fifth lens is made of H-TF3L material; the sixth lens is made of H-FK61 material; the seventh lens is made of H-ZF7LA material; the eighth lens is made of H-ZF13 material; and the ninth lens is made of H-ZF52A material.

[0010] Further, the optical system protection window has a diameter of φ50mm and a mass of 30g, the first lens has a diameter of φ42mm and a mass of 59.1g, the second lens has a diameter of φ38mm and a mass of 44.7g, the third lens has a diameter of φ33mm and a mass of 34.1g, the fourth lens has a diameter of φ30mm and a mass of 7.6g, the fifth lens has a diameter of φ30mm and a mass of 19.7g, the sixth lens has a diameter of φ30mm and a mass of 13g, the seventh lens has a diameter of φ30mm and a mass of 12g, the eighth lens has a diameter of φ30mm and a mass of 21g, the ninth lens has a diameter of φ30mm and a mass of 10.7g, and the detector protection window has a diameter of φ22mm and a mass of 1g. The outer dimension of the optical system (excluding the protection window) is <φ50mm×145mm, and the total weight of the optical system (excluding the protection window) is <222g.

[0011] Further, the working waveband of the optical system is 0.486μm-0.656μm, the focal length is 100mm, the F number is 2.8, the field of view size is 5.8°×5.8°, the detector is a high-resolution visible light detector with a resolution of 4096×4096 and a pixel size of 2.5μm, the modulation transfer function value of 0 field of view at 200lp / mm is ≥0.41, the modulation transfer function values of other fields of view are ≥0.4, the single-pixel angular aperture is ≤25urad, and the system distortion is ≤0.55%.

[0012] Further, the optical system is designed in a one-time imaging structure, domestic Chengdu Guangming visible light glass is selected as the lens material, full aluminum alloy material is selected for the mechanical part, the lens focal length is reasonably matched, the material characteristics are fully considered, the senior aberration theory is used, the contradiction between the optical aberration and the thermal aberration is effectively balanced, the global surface lens is used to realize the wide-temperature non-thermalization design of the optical system, the maximum value of the distortion of the optical system is 0.53% in the working temperature range of-110 DEG C to +120 DEG C; the transfer function value of 0 field is greater than or equal to 0.4 at 200 lp / mm at-110 DEG C, and the transfer function values of other fields are greater than or equal to 0.39; the transfer function value of 0 field is greater than or equal to 0.41 at 200 lp / mm at 20 DEG C, and the transfer function values of other fields are greater than or equal to 0.4; the transfer function value of 0 field is greater than or equal to 0.4 at 200 lp / mm at +120 DEG C, and the transfer function values of other fields are greater than or equal to 0.39.

[0013] Further, the relative luminance uniformity value of the image plane of the optical system is greater than 95.7%, the diffraction circle energy value in the range of 2um radius is greater than 72%, the diffraction circle energy value in the range of 4um radius is greater than 87%, and the diffraction circle energy value in the range of 6um radius is greater than 93%.

[0014] The beneficial effects of the present application relative to the prior art are:

[0015] 1. The working waveband of the optical system disclosed by the present application is 0.486um to 0.656um, the focal length is 100mm, the F number is 2.8, the field of view size is 5.8*5.8, the high-resolution visible light detector with a resolution of 4096*4096 and a pixel size of 2.5um is selected as the detector, and the optical system is a small-F-number wide-spectrum imaging optical system, which has the characteristics of wide working waveband, high resolution, small pixel size, large relative aperture and strong light collection capacity.

[0016] 2. The optical system disclosed by the present application adopts a one-time imaging optical structure, the outer dimension (excluding the protective window) is less than 50mm*145mm, and the total optical weight (excluding the protective window) is less than 222g, so that the optical system has the characteristics of compact structure, small size and light weight.

[0017] 3. The transfer function of the optical system disclosed by the present application is 0.41 (200lp / mm) at 0 field and 0.4 (200lp / mm) at other fields, the imaging quality is excellent, the single-pixel angular aperture is less than or equal to 25urad, the resolution is high, the detection distance is far, and the performance characteristics are outstanding.

[0018] 4. In order to adapt to extremely severe working environment, in the optical system design, through reasonable matching of lens power, fully considering material characteristics, using advanced aberration theory, effectively balancing the contradiction between optical aberration and thermal aberration, using global surface lens to realize the wide temperature non-thermal design of optical system, the imaging quality is excellent in the working temperature range of-110℃ to +120℃, the environmental adaptability is strong, the processing technology is good, it is easy to assemble and adjust, the good product rate is high and so on. At the same time, considering the low cost and localization demand of the system, domestic Chengdu Guangming visible light glass is selected as the lens material, the all-aluminum alloy material is selected for mechanical parts, the raw material procurement cycle is short, the price is low, the supply channel is stable, the production cost and cycle are controllable, and it is suitable for low-cost and large-batch production. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a 4K high-resolution ultra-wide temperature (230℃) non-thermal optical system structure diagram based on global surface lens;

[0020] Figure 2 It is an optical system modulation transfer function curve when the working temperature is-110℃;

[0021] Figure 3 It is an optical system modulation transfer function curve when the working temperature is +20℃;

[0022] Figure 4 It is an optical system modulation transfer function curve when the working temperature is +120℃;

[0023] Figure 5 It is an optical system distortion and field curvature curve;

[0024] Figure 6 It is an optical system point diagram curve;

[0025] Figure 7 It is an optical system image plane relative luminance uniformity curve;

[0026] Figure 8 It is an optical system diffraction circle energy curve;

[0027] In the figure: 1, optical system protection window, 2, first lens, 3, second lens, 4, third lens, 5, fourth lens, 6, fifth lens, 7, sixth lens, 8, seventh lens, 9, eighth lens, 10, ninth lens, 11, detector protection window, 12, detector photosensitive surface (image plane). DETAILED DESCRIPTION

[0028] The application will be described in detail below in combination with the drawings. EMBODIMENT

[0029] The embodiment discloses a global lens 4K high-resolution ultra-wide temperature (230 DEG C) athermal optical system, characterized in that: optical system protection window, first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens, detector protection window and detector photosensitive surface (image surface) are sequentially arranged from outside to inside in the propagation direction of light. The protection window, 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, the detector protection window and the detector photosensitive surface (image surface) are coaxially arranged. The optical system is used for receiving visible light reflection information inherent to a target and a background, and converging on the detector photosensitive surface to realize photoelectric conversion. The detector adopts a 4K high-resolution small-pixel detector, the resolution is 4096*4096, the pixel size is 2.5 mu m, the sensitivity is high, and the spatial resolution is small. In the daytime complex weather conditions, the target can be detected, identified and accurately positioned. In the working temperature range of-110 DEG C to +120 DEG C, clear imaging can be realized. The environmental adaptability is high. The optical imaging detection field can be applied. The high and low temperature gas detection, industrial multispectral imaging analysis and nondestructive testing and other civilian product fields can also be applied.

[0030] The specific purpose of the technical solution is to realize the ultra-wide temperature, high resolution, low cost and athermal design of the ultra-wide temperature imaging detection system. Based on the domestic Chengdu Guangming visible light optical material, the one-time imaging optical structure form is used, the high-resolution small-pixel large-array visible light detector with a face array scale of 4096*4096 and a pixel size of 2.5 mu m is selected as the receiver, and an ultra-wide temperature, high resolution, low cost and athermal imaging optical detection system is designed. In the daytime complex weather conditions, the target can be detected, identified and accurately positioned. In the working temperature range of-110 DEG C to +120 DEG C, clear imaging can be realized. The environmental adaptability is high. The optical imaging detection field can be applied. The high and low temperature gas detection, industrial multispectral imaging analysis and nondestructive testing and other civilian product fields can also be applied. Embodiment

[0031] The embodiment discloses a global lens 4K high-resolution super-wide temperature (230 DEG C) athermalization optical system, characterized in that: optical system protection window, first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens, detector protection window and detector photosensitive surface (image surface) are sequentially arranged from outside to inside in the propagation direction of light. The protection window, 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, the detector protection window and the detector photosensitive surface (image surface) are coaxially arranged. The optical system is used for receiving visible light reflection information inherent to a target and a background, and converging to the detector photosensitive surface to realize photoelectric conversion. The detector adopts a 4K high-resolution small-pixel detector, the resolution is 4096*4096, the pixel size is 2.5um, the sensitivity is high, and the spatial resolution is small. In the daytime complex weather conditions, the target can be detected, identified and accurately positioned. In the working temperature range of-110 DEG C to +120 DEG C, clear imaging can be realized, the environmental adaptability is high, and the optical imaging detection field can be applied. The optical imaging detection field can also be applied to the fields of high and low temperature gas detection, industrial multi-spectral imaging analysis and nondestructive testing.

[0032] The optical system protection window and the detector protection window are made of H-K9L material; the first lens is made of H-ZF6 material; the second lens is made of H-F4 material; the third lens is made of H-ZK9B material; the fourth lens is made of H-BAK7 material; the fifth lens is made of H-TF3L material; the sixth lens is made of H-FK61 material; the seventh lens is made of H-ZF7LA material; the eighth lens is made of H-ZF13 material; and the ninth lens is made of H-ZF52A material. The optical system protection window and the detector protection window are plane windows, and the rest of the lenses are spherical lenses.

[0033] The technical scheme defines the materials, the number and the surface type of the lenses. In order to adapt to the extremely harsh working environment, a one-time imaging structure form is adopted in the design, the lens focal length is reasonably matched, the material characteristics are fully considered, the senior aberration theory is used, the contradiction between optical aberration and thermal aberration is effectively balanced, the global lens is used to realize the wide temperature athermalization design of the optical system, the imaging quality is good in the working temperature range of-110 DEG C to +120 DEG C, the environmental adaptability is high, the processing process is good, the product is easy to assemble and adjust, the good product rate is high, and the like. At the same time, the low cost and the localization demand of the system are considered, domestic Chengdu Guangming visible light glass is selected as the lens material, and full aluminum alloy material is selected as the mechanical part. The raw material procurement cycle is short, the price is low, the supply channel is stable, the production cost and the cycle are controllable, and the technical scheme is suitable for low-cost and large-batch production. EMBODIMENT

[0034] The embodiment discloses a global lens 4K high-resolution ultra-wide temperature (230 DEG C) athermalization optical system, characterized in that: optical system protection window, first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens, detector protection window and detector photosensitive surface (image surface) are sequentially arranged from outside to inside in the propagation direction of light. The protection window, 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, the detector protection window and the detector photosensitive surface (image surface) are coaxially arranged. The optical system is used for receiving visible light reflection information inherent to the target and the background, and converging on the detector photosensitive surface to realize photoelectric conversion. The detector adopts a 4K high-resolution small-pixel detector, the resolution is 4096*4096, the pixel size is 2.5 um, the sensitivity is high, and the spatial resolution is small. In the daytime complex weather conditions, the target can be detected, identified and accurately positioned. In the working temperature range of-110 DEG C to +120 DEG C, clear imaging can be realized. The environmental adaptability is high, and the optical imaging detection field can be applied. The optical imaging detection field can also be applied to high and low temperature gas detection, industrial multi-spectral imaging analysis and nondestructive testing and other civilian fields.

[0035] The working waveband of the optical system is 0.486 um-0.656 um, the focal length is 100 mm, the F number is 2.8, the field of view size is 5.8*5.8, the detector selects a high-resolution visible light detector with a resolution of 4096*4096 and a pixel size of 2.5 um, the modulation transfer function value of 0 field of view is greater than or equal to 0.41 at 200 lp / mm, the modulation transfer function values of other fields of view are greater than or equal to 0.4, the single-pixel angular aperture is less than or equal to 25 urad, and the system distortion is less than or equal to 0.55%.

[0036] The technical parameters of the working waveband, the focal length, the F number, the field of view size, the detector resolution and the pixel size, the transfer function and the like of the optical system are limited, the system is a small-F-number high-resolution imaging optical system, and has the characteristics of large image surface size, small pixel size, large relative aperture and high resolution. Embodiment

[0037] The embodiment discloses a global lens 4K high-resolution super-wide temperature (230 DEG C) athermalization optical system, characterized in that: optical system protection window, first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens, detector protection window and detector photosensitive surface (image surface) are sequentially arranged from outside to inside in the propagation direction of light. The protection window, 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, the detector protection window and the detector photosensitive surface (image surface) are coaxially arranged. The optical system is used for receiving visible light reflection information inherent to a target and a background, and converging on the detector photosensitive surface to realize photoelectric conversion. The detector adopts a 4K high-resolution small-pixel detector, the resolution is 4096*4096, the pixel size is 2.5 mu m, the sensitivity is high, and the spatial resolution is small. In the daytime complex weather conditions, the target can be detected, recognized and accurately positioned. In the working temperature range of-110 DEG C to +120 DEG C, clear imaging can be realized, the environmental adaptability is high, and the optical imaging detection field can be applied. The optical imaging detection field can also be applied to the fields of high and low temperature gas detection, industrial multi-spectral imaging analysis and nondestructive testing.

[0038] In the working temperature range of-110 DEG C to +120 DEG C, the maximum value of the distortion design of the optical system is 0.53%; at-110 DEG C, the transfer function value of 0 field is greater than or equal to 0.4, and the transfer function values of other fields are greater than or equal to 0.39 at 200 lp / mm; at 20 DEG C, the transfer function value of 0 field is greater than or equal to 0.41, and the transfer function values of other fields are greater than or equal to 0.4 at 200 lp / mm; at +120 DEG C, the transfer function value of 0 field is greater than or equal to 0.4, and the transfer function values of other fields are greater than or equal to 0.39 at 200 lp / mm.

[0039] The optical system disclosed in the technical solution has a modulation transfer function curve design value close to the diffraction limit in the super-wide temperature working temperature range of-110 DEG C to +120 DEG C, excellent imaging quality, small distortion, good environmental adaptability and outstanding performance characteristics. Embodiment

[0040] The embodiment discloses a global lens 4K high-resolution ultra-wide temperature (230 DEG C) athermal optical system, characterized in that: optical system protection window, first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens, detector protection window and detector photosensitive surface (image surface) are sequentially arranged from outside to inside in the propagation direction of light. The protection window, 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, the detector protection window and the detector photosensitive surface (image surface) are coaxially arranged. The optical system is used for receiving visible light reflection information inherent to a target and a background, and converging on the detector photosensitive surface to realize photoelectric conversion. The detector adopts a 4K high-resolution small-pixel detector, the resolution is 4096*4096, the pixel size is 2.5 mu m, the sensitivity is high, and the spatial resolution is small. In the daytime complex weather conditions, the target can be detected, recognized and accurately positioned, clear imaging can be realized in the working temperature range of-110 DEG C to +120 DEG C, the environmental adaptability is high, and the optical imaging detection field can be applied. The optical imaging detection field can also be applied to the fields of high and low temperature gas detection, industrial multi-spectral imaging analysis and nondestructive testing.

[0041] The outer size (excluding the protection window) of the optical system is < phi 50 mm * 145 mm, and the total weight (excluding the protection window) of the optical system is < 222 g.

[0042] The technical scheme limits the outer size and total weight of the optical system, and has the characteristics of compact structure, small volume and light weight. Embodiment

[0043] The embodiment discloses a global lens 4K high-resolution ultra-wide temperature (230 DEG C) athermalization optical system, characterized in that: an optical system protection window, 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, a detector protection window and a detector photosensitive surface (image surface) are sequentially arranged from outside to inside in the propagation direction of light. The protection window, 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, the detector protection window and the detector photosensitive surface (image surface) are coaxially arranged. The optical system is used for receiving visible light reflection information inherent to a target and a background, and converging on the detector photosensitive surface to realize photoelectric conversion. The detector adopts a 4K high-resolution small-pixel detector, the resolution is 4096*4096, the pixel size is 2.5 mu m, the sensitivity is high, and the spatial resolution is small. In the daytime complex weather conditions, the target can be detected, recognized and accurately positioned. In the working temperature range of-110 DEG C to +120 DEG C, clear imaging can be realized. The environmental adaptability is high, and the optical imaging detection field can be applied. The optical imaging detection field can also be applied to high and low temperature gas detection, industrial multi-spectral imaging analysis and nondestructive testing and other civilian product fields.

[0044] The relative illumination uniformity of the image surface of the optical system is greater than 95.7%, the diffraction circle energy is greater than 72% in the range of 2 mu m radius, greater than 87% in the range of 4 mu m radius, and greater than 93% in the range of 6 mu m radius.

[0045] The technical scheme limits the relative illumination uniformity of the image surface of the optical system, the system diffraction circle energy value and the single-pixel angle of view. The optical system has good image surface uniformity, high energy concentration, strong light collection ability, high angular resolution and long detection distance, and can be applied to a high-resolution small-pixel detector with a pixel size less than 2 mu m.

[0046] Working principle of the optical imaging detection system

[0047] The optical imaging detection system (hereinafter referred to as the system) is composed of a protective window, a shell cabin, an optical system, an imaging detector, an image processing and signal transmission system, and a terminal control system. Among them, the protective window and the shell cabin form a sealed space for protecting the internal devices of the system, which has the characteristics of high strength, high hardness, radiation resistance, high temperature resistance, high transmittance, etc., to ensure the normal work of the system in complex working conditions. The optical system is used to receive the reflection information inherent to the target and the background, and to converge to the photosensitive surface of the imaging detector. The imaging detector converts the optical signal into an electrical signal to realize photoelectric conversion, with high sensitivity and small spatial resolution. The image processing and signal transmission system processes the received data information and transmits it to the terminal control system. The terminal control system analyzes and judges the received data information and sends control instructions to realize the detection, identification and accurate positioning of the target. The present application only elaborates on the optical system, and does not specifically describe other subsystems.

[0048] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A global surface lens-based 4K high-resolution 230℃ ultrawide temperature range athermal optical system, characterized in that: An optical system protective window (1), a first lens (2), a second lens (3), a third lens (4), a fourth lens (5), a fifth lens (6), a sixth lens (7), a seventh lens (8), an eighth lens (9), a ninth lens (10), a detector protective window (11), and a detector photosensitive surface (12) are arranged sequentially from the outside to the inside along the direction of light propagation. The protective window (1), the first lens (2), the second lens (3), the third lens (4), the fourth lens (5), the fifth lens (6), the sixth lens (7), the seventh lens (8), the eighth lens (9), the ninth lens (10), the detector protective window (11), and the detector photosensitive surface (12) are arranged coaxially. Used to receive visible light reflection information inherent to the target and background, and converge it onto the photosensitive surface of the detector to achieve photoelectric conversion. The detector adopts a 4K high-resolution small pixel detector with a resolution of 4096×4096 and a pixel size of 2.5μm. Under complex weather conditions during the day, it can realize the detection, identification and precise positioning of the target. It can clearly image within the working temperature range of -110℃~+120℃, has strong environmental adaptability, and can be applied to the field of optical imaging detection. It can also be used in the fields of high and low temperature gas detection, industrial multispectral imaging analysis and non-destructive testing of civilian products. The inner and outer surfaces of the optical system protection window (1) are both flat and have a thickness of 6mm; the radius of curvature of the outer surface of the first lens (2) is 79.

5. The first lens (4) has a radius of curvature of 4mm, an inner surface radius of curvature of 86.91mm, and a thickness of 13.5mm; the second lens (3) has a radius of curvature of 129.24mm on the outer surface, a radius of curvature of 57.35mm on the inner surface, and a thickness of 14mm; the third lens (4) has a radius of curvature of 67.89mm on the outer surface, a radius of curvature of -381.6mm on the inner surface, and a thickness of 12.35mm; the fourth lens (5) has a radius of curvature of 44.28mm on the outer surface, a radius of curvature of 1167.76mm on the inner surface, and a thickness of 5.05mm; the fifth lens (6) has a radius of curvature of -164.68mm on the outer surface, a radius of curvature of 39.26mm on the inner surface, and a thickness of 8.15mm. m; The radius of curvature of the outer surface of the sixth lens (7) is 39.26 mm, the radius of curvature of the inner surface is -124.25 mm, and the thickness is 6.9 mm; The radius of curvature of the outer surface of the seventh lens (8) is -362.95 mm, the radius of curvature of the inner surface is 59.69 mm, and the thickness is 4.1 mm; The radius of curvature of the outer surface of the eighth lens (9) is 89.43 mm, the radius of curvature of the inner surface is -91.09 mm, and the thickness is 10.4 mm; The radius of curvature of the outer surface of the ninth lens (10) is -33.49 mm, the radius of curvature of the inner surface is -156.22 mm, and the thickness is 3.5 mm; The detector protection window (11) has a planar inner and outer surface with a thickness of 1 mm.

2. The global surface lens-based 4K high-resolution 230℃ ultrawide temperature range athermal optical system according to claim 1, characterized in that: The optical system protection window (1) and detector protection window (11) are planar lenses, and the first lens (2), second lens (3), third lens (4), fourth lens (5), fifth lens (6), sixth lens (7), seventh lens (8), eighth lens (9) and ninth lens (10) are all spherical lenses.

3. The global surface lens-based 4K high-resolution 230℃ ultrawide temperature range athermal optical system according to claim 1, characterized in that: The optical system protection window (1) and detector protection window (11) are made of H-K9L material; the first lens (2) is made of H-ZF6 material; the second lens (3) is made of H-F4 material; the third lens (4) is made of H-ZK9B material; the fourth lens (5) is made of H-BAK7 material; the fifth lens (6) is made of H-TF3L material; the sixth lens (7) is made of H-FK61 material; the seventh lens (8) is made of H-ZF7LA material; the eighth lens (9) is made of H-ZF13 material; and the ninth lens (10) is made of H-ZF52A material.

4. The global surface lens-based 4K high-resolution 230℃ ultrawide temperature range athermal optical system according to claim 1, characterized in that: The air gap between the optical system protective window (1) and the first lens (2) is 3 mm; the air gap between the first lens (2) and the second lens (3) is 6 mm; the air gap between the second lens (3) and the third lens (4) is 1.6 mm; the air gap between the third lens (4) and the fourth lens (5) is 1 mm; the air gap between the fourth lens (5) and the fifth lens (6) is 2.7 mm; the fifth lens (6) and the sixth lens (7) are bonded together with optical adhesive; the air gap between the sixth lens (7) and the seventh lens (8) is 0.3 mm; the air gap between the seventh lens (8) and the eighth lens (9) is 20.5 mm; the air gap between the eighth lens (9) and the ninth lens (10) is 24.1 mm; the air gap between the ninth lens (10) and the detector protective window (11) is 9.66 mm; the distance between the detector protective window (11) and the detector photosensitive surface (12) is 1 mm.

5. The global surface lens-based 4K high-resolution 230℃ ultrawide temperature range athermal optical system according to claim 1, characterized in that: The optical system has a protective window (1) with a diameter of φ50mm and a mass of 30g, a first lens (2) with a diameter of φ42mm and a mass of 59.1g, a second lens (3) with a diameter of φ38mm and a mass of 44.7g, a third lens (4) with a diameter of φ33mm and a mass of 34.1g, a fourth lens (5) with a diameter of φ30mm and a mass of 7.6g, a fifth lens (6) with a diameter of φ30mm and a mass of 19.7g, and a sixth lens (7). The aperture of the seventh lens (8) is φ30mm and the mass is 13g. The aperture of the eighth lens (9) is φ30mm and the mass is 21g. The aperture of the ninth lens (10) is φ30mm and the mass is 10.7g. The aperture of the detector protection window (11) is φ22mm and the mass is 1g. The external dimensions of the optical system without the protection window are <φ50mm×145mm, and the total optical weight without the protection window is <222g.

6. The global surface lens-based 4K high-resolution 230℃ ultrawide temperature range athermal optical system according to claim 1, characterized in that: The optical system operates in the wavelength range of 0.486μm to 0.656μm, has a focal length of 100 mm, an F-number of 2.8, and a field of view of 5.8° × 5.8°. The detector used is a high-resolution visible light detector with a resolution of 4096 × 4096 and a pixel size of 2.5μm. At 200 lp / mm, the modulation transfer function value at 0 field of view is ≥0.41, the transfer function value at other fields of view is ≥0.4, the single pixel angle is ≤25 urad, and the system distortion is ≤0.55%.

7. The global surface lens-based 4K high-resolution 230℃ ultrawide temperature range athermal optical system according to claim 1, characterized in that: The optical system is designed with a single-image structure. All mechanical components are made of aluminum alloy. By rationally matching the lens power and fully considering material properties, advanced aberration theory is applied to effectively balance the contradiction between optical aberration and thermal difference. A global surface lens is used to achieve a wide-temperature, athermal design for the optical system. Within the operating temperature range of -110℃ to +120℃, the maximum distortion design value of the optical system is 0.53%. At -110℃, at 200 lp / mm, the transfer function value for the 0 field of view is ≥0.4, and the transfer function value for the other fields of view is ≥0.

39. At 20℃, at 200 lp / mm, the transfer function value for the 0 field of view is ≥0.41, and the transfer function value for the other fields of view is ≥0.

4. At +120℃, at 200 lp / mm, the transfer function value for the 0 field of view is ≥0.4, and the transfer function value for the other fields of view is ≥0.

39.

8. The global surface lens-based 4K high-resolution 230℃ ultrawide temperature range athermal optical system according to claim 1, characterized in that: The image plane relative illumination uniformity of the optical system is >95.7%, and the diffraction ingress energy is >72% in the radius of 2μm, >87% in the radius of 4μm, and >93% in the radius of 6μm.

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