An optoelectronic monitoring system

Abstract

The present application relates to a kind of photoelectric monitoring systems, by optical imaging module, photodetector module, data storage module and display module four parts are composed.Optical imaging module includes 6 lenses, in the direction of light incidence is negative lens, positive lens, positive lens, positive lens, negative lens, negative lens in order, the focal length of optical imaging module is 2.20mm, F number is 3.6, field of view angle 99 °, total length 14.0mm.Photodetector module can use 1280*1024 pixel's CCD detector.The monitoring picture data that photodetector module is collected can be stored into data storage module simultaneously, can also be displayed in real time on display module.The photoelectric monitoring system is mainly used for the video monitoring scene of higher imaging quality requirement.Optical imaging module only uses one aspheric lens, both improves imaging quality, and does not greatly increase cost.In the design process, all aberrations are corrected and balanced, so that it has the advantages of excellent image quality, high resolution, high cost performance, lightweight and the like.

Description

Technical Field

[0001] This invention relates to the field of optical design technology, and in particular to an optoelectronic monitoring system. Background Technology

[0002] Optoelectronic monitoring technology is a technique that combines optical imaging and electronic technologies to monitor, detect, identify, and track specific areas or objects. It is currently widely used in various fields. Optoelectronic monitoring systems provide real-time monitoring images and information feedback, enabling relevant personnel to promptly understand the situation within the monitored area and take necessary actions. These systems can utilize image processing algorithms to achieve automatic identification and target tracking, thereby reducing the workload of operators and improving monitoring efficiency. In summary, the advantages of optoelectronic monitoring technology lie in its high efficiency, flexibility, and multifunctionality, making it an indispensable part of modern monitoring systems.

[0003] Optoelectronic monitoring systems consist of optical imaging modules and other modules. The primary function of the optical imaging module is to image the target area; in other words, it largely determines the imaging quality of the entire system. Therefore, the development of the optical imaging module is crucial to the overall development of the optoelectronic monitoring system. Typical optoelectronic monitoring systems either have low imaging quality, failing to meet the demands of scenarios with high monitoring performance requirements, or are too expensive, hindering widespread application. To achieve better imaging performance, the optical imaging module generally needs to employ aspherical technology. However, aspherical surfaces are relatively expensive to manufacture. Therefore, it is essential to consider both the imaging performance and manufacturing cost of the optical imaging module.

[0004] To overcome the above shortcomings, a new photoelectric monitoring system was designed. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a photoelectric monitoring system, which includes an optical imaging module, a photodetector module, a data storage module, and a display module. The image plane size of the optical imaging module is 4.6 mm, and the photodetector module uses a 1280*1024 pixel CCD detector with a single pixel size of 3.60 μm. The monitoring image data acquired by the photodetector module can be synchronously stored in the data storage module or displayed in real time on the display module. The optical imaging module of this system uses only one aspherical lens, which significantly improves the image quality without significantly increasing the cost. During the design process, the degrees of freedom of each variable are fully utilized to correct and balance aberrations. Ultimately, this photoelectric monitoring system has advantages such as excellent image quality, high resolution, high cost-effectiveness, and lightweight design.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions.

[0007] This invention provides a photoelectric monitoring system, including an optical imaging module, a photodetector module, a data storage module, and a display module. The optical imaging module includes a first negative lens, a first positive lens, a second positive lens, a third positive lens, a second negative lens, and a third negative lens arranged coaxially along the incident light direction. The first negative lens is made of HZK9A_CDGM material, with a convex and aspherical object-side surface and a concave and aspherical image-side surface, and a aperture diameter of 9.0 mm < 10.0 mm and a thickness of 1.0 mm. The first positive lens is made of NFK5_SCHOTT material, with a convex object-side surface and a convex image-side surface, and an aperture diameter of 4.0 mm < 5.0 mm and a thickness of 1.0 mm. The second positive lens is made of... The first positive lens is made of NSF10_SCHOTT, with a convex object-side and a concave image-side, and a diameter of 3.0mm < aperture < 3.5mm, and a thickness of 0.5mm < 1.0mm. The second negative lens is made of NSF10_SCHOTT, with a concave object-side and a convex image-side, and a diameter of 1.5mm < aperture < 2.5mm, and a thickness of 1.0mm < 1.5mm. The third negative lens is made of HLAK10_NHG, with a convex object-side and a convex image-side, and a diameter of 1.5mm < aperture < 2.5mm, and a thickness of 1.0mm < 1.5mm. The fourth negative lens is made of HLAF4_CDGM, with a concave object-side and a convex image-side, and a diameter of 2.5mm < aperture < 3.0mm, and a thickness of 0.4mm < 0.8mm. These six optical glasses achieve good chromatic aberration and aberration correction effects through material combination.

[0008] Optionally, the first negative lens has a light-transmitting aperture of 9.44 mm and a thickness of 1.41 mm; the first positive lens has a light-transmitting aperture of 4.50 mm and a thickness of 1.51 mm; the second positive lens has a light-transmitting aperture of 3.29 mm and a thickness of 0.88 mm; the third positive lens has a light-transmitting aperture of 0.89 mm and a thickness of 0.88 mm; the second negative lens has a light-transmitting aperture of 2.07 mm and a thickness of 1.29 mm; and the third negative lens has a light-transmitting aperture of 2.84 mm and a thickness of 0.60 mm.

[0009] Optionally, the third positive lens and the second negative lens form a cemented lens.

[0010] Optionally, the distance between the center of the light exit surface of the third negative lens and the image plane is 1.10 mm.

[0011] Optionally, the optical dimensions of the optical imaging module of the photoelectric monitoring system are φ9.44×14.00mm.

[0012] Optionally, the optical system of the optical imaging module of the photoelectric monitoring system has a focal length of 2.20mm and an F number of 3.6.

[0013] Optionally, the optical imaging module of the optoelectronic monitoring system operates in the wavelength range of 430nm to 665nm.

[0014] Optionally, the full field of view of the optical imaging module of the photoelectric monitoring system is 99°.

[0015] As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages: 1. The photoelectric monitoring system has an optical imaging module consisting of six lenses, including only one aspherical lens, which significantly improves the imaging quality without significantly increasing the cost, making it cost-effective and suitable for use in places with high monitoring performance requirements.

[0016] The photoelectric monitoring system has an optical imaging module with optical dimensions of φ9.44×14.00mm and a focal length of 2.20mm, which has the advantage of miniaturization. Attached Figure Description

[0017] Figure 1 This is a system block diagram of the photoelectric monitoring system of the present invention; Figure 2 This is a structural diagram of the optical imaging module of the photoelectric monitoring system of the present invention; Figure 3 This is a dot diagram of the optical imaging module of the photoelectric monitoring system of the present invention; Figure 4 This is the optical modulation transfer function of the optical imaging module of the photoelectric monitoring system of the present invention; Figure reference numerals: 1-First negative lens; 2-First positive lens; 3-Second positive lens; STO-Aperture stop; 4-Third positive lens; 5-Second negative lens; 6-Third negative lens; IMA-Image plane. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0019] Please refer to Figure 1The diagram below shows the system block diagram of the present invention. Ambient light enters the optical imaging module and is then captured by the photodetector module. The monitoring screen data captured by the photodetector module can be synchronously stored in the data storage module or displayed on the display module in real time.

[0020] Please refer to Figure 2 The diagram shows the optical system structure of this invention. This photoelectric monitoring system includes an optical imaging module comprising six lenses arranged in a negative-positive-positive-negative-negative configuration. The six lenses are coaxially arranged along the light incident direction as follows: a first negative lens 1, a first positive lens 2, a second positive lens 3, a third positive lens 4, a second negative lens 5, and a third negative lens 6. The first negative lens is made of HZK9A_CDGM material, with a convex and aspherical object-side surface and a concave and aspherical image-side surface, and a aperture diameter of 9.0 mm < 10.0 mm and a thickness of 1.0 mm < 2.0 mm. The first positive lens is made of NFK5_SCHOTT material, with a convex object-side surface and a convex image-side surface, and a aperture diameter of 4.0 mm < 5.0 mm and a thickness of 1.0 mm < 2.0 mm. The second positive lens is made of NSF10_SCHOTT material, with a convex object-side surface and a concave image-side surface, and a aperture diameter of 3.0 mm < 3.5 mm and a thickness of 0.5 mm < 10.0 mm. 1.0mm; the material of the third positive lens is HLAK10_NHG, the object side is convex, the image side is convex, 0.5mm < aperture < 1.5mm, 0.5mm < thickness < 1.0mm; the material of the second negative lens is NSF10_SCHOTT, the object side is concave, the image side is convex, 1.5mm < aperture < 2.5mm, 1.0mm < thickness < 1.5mm; the material of the third negative lens is HLAF4_CDGM, the object side is concave, the image side is convex, 2.5mm < aperture < 3.0mm, 0.4mm < thickness < 0.8mm.

[0021] In one embodiment, the first negative lens has a light-transmitting aperture of 9.44 mm and a thickness of 1.41 mm; the first positive lens has a light-transmitting aperture of 4.50 mm and a thickness of 1.51 mm; the second positive lens has a light-transmitting aperture of 3.29 mm and a thickness of 0.88 mm; the third positive lens has a light-transmitting aperture of 0.89 mm and a thickness of 0.88 mm; the second negative lens has a light-transmitting aperture of 2.07 mm and a thickness of 1.29 mm; and the third negative lens has a light-transmitting aperture of 2.84 mm and a thickness of 0.60 mm. This results in an optical system with a focal length of 2.20 mm, an F-number of 3.6, a field of view of 99°, and dimensions of φ9.44 × 14.00 mm. The system possesses advantages such as excellent image quality, high resolution, high cost-effectiveness, and lightweight design.

[0022] In one embodiment, the optical imaging module of the photoelectric monitoring system contains only one aspherical lens, which significantly improves the imaging quality without significantly increasing the cost, making it suitable for use in places with high monitoring performance requirements.

[0023] In one embodiment, the optical system of the photoelectric monitoring system has excellent performance and is much less expensive than other optical systems with the same level of imaging quality.

[0024] In one embodiment, the third positive lens and the second negative lens form a cemented lens, and the combination of optical materials in the cemented lens ensures that the chromatic aberration of the optical system is well corrected.

[0025] Please refer to Figure 3 The diagram shows the dot pattern of the optical system of the present invention. It can be seen that the RMS of the dot pattern within the 0.7 field of view is less than 3.7 μm, and the RMS of the dot pattern in the 1.0 edge field of view is less than 4.3 μm. This indicates that the aberrations of the optical system are well corrected overall, and the aberration correction effect in the area closer to the center field of view, which has a greater viewing weight, is better than that in the edge field of view.

[0026] Please refer to Figure 4 , where is the optical modulation transfer function of the optical system of the present invention. It can be seen that within the spatial frequency range of less than 200 cycles / mm, the optical modulation transfer function of the field of view is higher than 0.2, indicating that the optical system has excellent imaging quality.

[0027] The following shows the lens data for the optoelectronic monitoring system. Table 1 shows the surface type and surface parameters of each lens in the optical system.

[0028] Table 1 The aspherical surface formula used in this embodiment of the invention is as follows: Where z is the sag of the aspherical surface at a position of radius r along the optical axis, from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface; and k is the conic coefficient. i is the correction coefficient of the i-th order for the aspherical surface.

[0029] Table 2 shows the coefficients of higher-order terms for each aspherical surface in this embodiment.

[0030] Table 2 S1 0.36 0.0060 -0.0003 1.3E-6 4.6E-8 -5.8E-11 S2 -0.67 0.021 -3.7E-5 0.0005 -5.4E-5 8.7E-20 The photoelectric monitoring system described in this invention has a focal length of 2.20mm, an F-number of 3.6, a field of view of 99°, and optical dimensions of φ9.44×14.00mm. This system is primarily used in video monitoring scenarios requiring high imaging quality. The optical imaging module of this system is designed with cost considerations in mind, containing only one aspherical lens, which significantly improves imaging quality without substantially increasing costs. Various aberrations are corrected and balanced, resulting in a photoelectric monitoring system with advantages such as excellent image quality, high resolution, high cost-effectiveness, and lightweight design.

[0031] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A photoelectric monitoring system, comprising an optical imaging module, a photodetector module, a data storage module, and a display module, wherein the optical imaging module is characterized in that it consists of a first negative lens, a first positive lens, a second positive lens, a third positive lens, a second negative lens, and a third negative lens arranged coaxially along the incident direction of light. The first negative lens is made of HZK9A_CDGM material, with an aspherical object side and an aspherical image side, and a aperture diameter of 9.0mm < 10.0mm. The material of the first positive lens is NFK5_SCHOTT, with a light transmission diameter of 4.0mm < aperture diameter < 5.0mm; The material of the second positive lens is NSF10_SCHOTT, with a light transmission diameter of 3.0mm < aperture diameter < 3.5mm; The material of the third positive lens is HLAK10_NHG, with a light transmission diameter of 0.5mm < aperture diameter < 1.5mm; The second negative lens is made of NSF10_SCHOTT material, with a aperture diameter of 1.5mm < 2.5mm. The third negative lens is made of HLAF4_CDGM material, with a light transmission diameter of 2.5mm < aperture diameter < 3.0mm; in, The first negative lens has an object-side radius of curvature of 9.0680 mm, an image-side radius of curvature of 2.1719 mm, a lens thickness of 1.4050 mm, a refractive index of 1.62, and a dispersion coefficient of 60.4; the distance between the first negative lens and the first positive lens is 4.7517 mm. The object-side radius of curvature of the first positive lens is 4.1933 mm, the image-side radius of curvature is -13.2918 mm, the lens thickness is 1.5112 mm, the refractive index is 1.49, and the dispersion coefficient is 70.4; the distance between the first positive lens and the second positive lens is 0.1000 mm. The second positive lens has an object-side radius of curvature of 3.6343 mm, an image-side radius of curvature of 3.7995 mm, a lens thickness of 0.8816 mm, a refractive index of 1.73, and a dispersion coefficient of 28.5; the distance between the second and third positive lenses is 1.2451 mm. The third positive lens has an object-side radius of curvature of 2.3516 mm, an image-side radius of curvature of -1.6000 mm, a lens thickness of 0.8796 mm, a refractive index of 1.65, and a dispersion coefficient of 55.

9. The second negative lens has an object-side radius of curvature of -1.6000 mm, an image-side radius of curvature of -3.3484 mm, a lens thickness of 1.2879 mm, a refractive index of 1.73, and a dispersion coefficient of 28.

5. The third positive lens and the second negative lens together form a cemented lens. The distance between the second and third negative lenses is 0.2378 mm. The third negative lens has an object-side radius of curvature of -1.5426 mm, an image-side radius of curvature of -3.9925 mm, a lens thickness of 0.6000 mm, a refractive index of 1.75, and a dispersion coefficient of 35.

2. The photoelectric monitoring system as described in claim 1, wherein the optical imaging module is characterized in that: The aperture of the first negative lens is 9.44 mm; The aperture of the first positive lens is 4.50 mm; The aperture of the second positive lens is 3.29 mm; The aperture of the third positive lens is 0.89 mm; The aperture of the second negative lens is 2.07 mm; The aperture of the third negative lens is 2.84 mm.

3. The photoelectric monitoring system as described in claim 1, wherein the optical imaging module is characterized in that the distance between the center of the light emission surface of the third negative lens and the image plane is 1.10 mm.

4. The photoelectric monitoring system as described in claim 1, wherein the optical imaging module is characterized in that: the optical dimensions of the optical imaging module are φ9.44×14.00mm.

5. The photoelectric monitoring system as described in claim 1, wherein the optical imaging module is characterized in that: the working wavelength range of the optical imaging module is 430nm~665nm.

6. The photoelectric monitoring system as described in claim 1, wherein the optical imaging module is characterized in that: the full field of view of the optical imaging module is 99°.

7. The photoelectric monitoring system as described in claim 1, wherein the optical imaging module is characterized in that: the optical system of the optical imaging module has a focal length of 2.20mm and an F number of 3.6.

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