Large-view-field high-resolution miniature optical system for binocular positioning
By designing a large field-of-view, high-resolution micro-optical system and employing specific lens combinations and aperture surfaces, the problems of small field of view and low resolution in binocular positioning systems in space have been solved, achieving high-precision positioning and cost savings.
Patent Information
- Application Number
- CN202423238387.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing binocular positioning systems in space have a small field of view, limited image size, and centimeter-level resolution, resulting in low positioning accuracy. At the same time, they are also large in size and weight, affecting launch costs.
Design a large field-of-view, high-resolution miniature optical system using a combination of glass spherical lenses with specific focal lengths and thicknesses, including a first negative lens to a fifth negative lens, combined with an aperture stop, to ensure that the optical system is on the same optical axis, with a field of view of 90° and a resolution of 1.1mm, meeting the requirements for high-precision positioning.
It significantly improves the image width and positioning accuracy of the optical system, provides more target points for binocular positioning, has a compact structure, reduces cost and space occupation, has high resolution and low distortion, and is suitable for the complex environment in space.
Smart Images
Figure CN223565985U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to space binocular positioning field, concretely relates to a big field of vision high resolution for binocular positioning's micro optical system. BACKGROUND
[0002] The key to realize binocular positioning is binocular stereo vision technology, compared with single view image processing technology, through two cameras synchronous shooting image obtains depth information, thereby improves target recognition, positioning and tracking accuracy.
[0003] At present, the optical system for binocular positioning in space is limited by rocket launch cost, thrust and weight and other factors, its volume and weight cannot be too large. Because the environment in space is complex and uncontrollable, the optical system for binocular positioning needs to be able to shoot multiple target points at the same time to improve the accuracy and stability of binocular positioning. Because the accuracy of binocular positioning is directly related to the size of the object that the optical system can distinguish, the optical system for binocular positioning also needs to have a large resolution.
[0004] The development trend of the camera used for binocular positioning in space is to shoot large format images, distinguish smaller objects and have lighter quality. But the optical system for binocular positioning in space at home and abroad generally has a small field of view angle, limited image size, centimeter level resolution, which affects the accuracy of binocular positioning, and large volume and weight, which affects the launch cost. UTILITY MODEL CONTENT
[0005] The utility model solves the problems of small field of view angle, limited image size, centimeter level resolution leading to low positioning accuracy, and large volume and weight affecting launch cost of the existing binocular positioning system in space, and provides a micro optical system for binocular positioning with large field of view and high resolution, which meets the requirements of large field of view, high resolution, high positioning accuracy and compact structure by reasonable selection of structure and material.
[0006] A kind of micro optical system for binocular positioning of large field of view high resolution, including to be positioned end, imaging end and the lens group arranged along optical axis between the two;The center of the to-be-positioned end, imaging end and each piece of lens is located on the same optical axis, the arrangement order of the lens group from to-be-positioned end to imaging end is first negative lens, second negative lens, third negative lens, first positive lens, second positive lens, fourth negative lens, third positive lens, fourth positive lens, fifth positive lens and fifth negative lens;The optical system includes diaphragm surface between third positive lens and fourth positive lens;The first negative lens, second negative lens, third negative lens, first positive lens, second positive lens, fourth negative lens, third positive lens, fourth positive lens, fifth positive lens and fifth negative lens are all glass spherical lenses;The to-be-positioned end and imaging end are placed perpendicularly to system optical axis.
[0007] Preferably, the focal length of the first negative lens is between -30mm and -32mm;The focal length of the second negative lens is between -20mm and -22mm;The focal length of the third negative lens is between -15mm and -17mm;The focal length of the first positive lens is between 15mm and 17mm;The focal length of the second positive lens is between 13mm to 15mm;The focal length of the fourth negative lens is between -25mm to -27mm;The focal length of the third positive lens is between 6mm to 8mm;The focal length of the fourth positive lens is between 80mm to 82mm;The focal length of the fifth positive lens is between 16mm to 18mm;The focal length of the fifth negative lens is between -5mm to -7mm.
[0008] Preferably, the thickness of the first negative lens is between 1.9mm to 2mm;The thickness of the second negative lens is between 1.9mm to 2mm;The thickness of the third negative lens is between 1.5mm to 1.6mm;The thickness of the first positive lens is between 3.5mm to 3.6mm;The thickness of the second positive lens is between 2.4mm to 2.5mm;The thickness of the fourth negative lens is between 1mm to 1.1mm;The thickness of the third positive lens is between 1.4mm to 1.5mm;The thickness of the fourth positive lens is between 0.9mm to 1mm;The thickness of the fifth positive lens is between 1.2mm to 1.3mm;The thickness of the fifth negative lens is between 0.8mm to 0.9mm.
[0009] Preferably, the air gap between the first negative lens and the second negative lens is between 3mm and 3.1mm; the air gap between the second negative lens and the third negative lens is between 2.9mm and 3mm; the air gap between the third negative lens and the first positive lens is between 2.4mm and 2.5mm; the air gap between the first positive lens and the second positive lens is between 3.1mm and 3.2mm; the air gap between the second positive lens and the fourth negative lens is between 0.6mm and 0.7mm; the air gap between the fourth negative lens and the third positive lens is between 0.5mm and 0.6mm; the air gap between the third positive lens and the fourth positive lens is between 2.2mm and 2.3mm; the air gap between the fourth positive lens and the fifth positive lens is between 0.8mm and 0.9mm; the air gap between the fifth positive lens and the fifth negative lens is between 1.1mm and 1.2mm.
[0010] Preferably, the air gap between the diaphragm plane and the fourth positive lens is 1mm.
[0011] Preferably, the first negative lens material is K9; the second negative lens material is H-ZF52; the third negative lens material is H-ZF4A; the first positive lens material is H-ZF52; the second positive lens material is H-QK3L; the fourth negative lens material is H-ZF73; the third positive lens material is H-ZK3; the fourth positive lens material is H-BAK7; the fifth positive lens material is H-ZPK5; and the fifth negative lens material is H-ZF73.
[0012] Preferably, the imaging spectral range of the optical system is between 450nm and 750nm.
[0013] Preferably, the field of view angle of the optical system is 90°.
[0014] Preferably, the resolution of the optical system at 1m is 1.1mm.
[0015] The beneficial effects of the present utility model are as follows:
[0016] 1. The spectral range of the optical system is between 450nm and 750nm, which can be applied to various environments in space.
[0017] 2. The field of view angle of the optical system is 90°, which can significantly increase the frame width of the optical system and provide more target points for binocular positioning.
[0018] 3. The optical system can distinguish 1.1mm object at 1m, and can improve positioning accuracy.
[0019] 4. The optical system has short total length, simple structure, cost control and optimization, and can significantly save cost and space.
[0020] 5. The optical system is based on the basic principle of imaging optics, and the optical design software is used for repeated aberration optimization design, which can provide high-quality images for binocular positioning. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is a whole structure schematic diagram of a large field of view high resolution miniature optical system for binocular positioning.
[0022] Figure 2 It is a schematic diagram of lens group and imaging end;
[0023] Figure 3 It is a modulation transfer function curve diagram;
[0024] Figure 4 It is a point column diagram;
[0025] Figure 5 It is a vertical axis chromatic aberration diagram;
[0026] Figure 6 It is a curve distortion diagram.
[0027] In the figure: L, to be positioned end, M, lens group, S, imaging end, M1, first negative lens, M2, second negative lens, M3, third negative lens, M4, first positive lens, M5, second positive lens, M6, fourth negative lens, M7, third positive lens, M8, fourth positive lens, M9, fifth positive lens, M10, fifth negative lens, T, diaphragm surface. DETAILED DESCRIPTION
[0028] The utility model will be further described in combination with the description and specific embodiment of the drawings.
[0029] In combination Figures 1 to 6The embodiment discloses a large-view-field high-resolution micro optical system for binocular positioning, which comprises a to-be-positioned end L, an imaging end S and a lens group M arranged along an optical axis between the two ends, wherein the to-be-positioned end L, the imaging end S and the center of each lens are located on the same optical axis, and the lens group is arranged in the order of a first negative lens M1, a second negative lens M2, a third negative lens M3, a first positive lens M4, a second positive lens M5, a fourth negative lens M6, a third positive lens M7, a fourth positive lens M8, a fifth positive lens M9 and a fifth negative lens M10 from the to-be-positioned end L to the imaging end S.
[0030] The optical system further comprises an aperture plane T between the third positive lens M7 and the fourth positive lens M8.
[0031] The first negative lens M1, the second negative lens M2, the third negative lens M3, the first positive lens M4, the second positive lens M5, the fourth negative lens M6, the third positive lens M7, the fourth positive lens M8, the fifth positive lens M9 and the fifth negative lens M10 are all glass spherical lenses located on the same optical axis.
[0032] The to-be-positioned end L and the imaging end S are both arranged perpendicularly to the system optical axis.
[0033] In the embodiment, the focal length of the first negative lens M1 is between -30 mm and -32 mm, the focal length of the second negative lens M2 is between -20 mm and -22 mm, the focal length of the third negative lens M3 is between -15 mm and -17 mm, the focal length of the first positive lens M4 is between 15 mm and 17 mm, the focal length of the second positive lens M5 is between 13 mm and 15 mm, the focal length of the fourth negative lens M6 is between -25 mm and -27 mm, the focal length of the third positive lens M7 is between 6 mm and 8 mm, the focal length of the fourth positive lens M8 is between 80 mm and 82 mm, the focal length of the fifth positive lens M9 is between 16 mm and 18 mm, and the focal length of the fifth negative lens M10 is between -5 mm and -7 mm.
[0034] In the embodiment, the thickness of the first negative lens M1 is between 1.9 mm and 2 mm; the thickness of the second negative lens M2 is between 1.9 mm and 2 mm; the thickness of the third negative lens M3 is between 1.5 mm and 1.6 mm; the thickness of the first positive lens M4 is between 3.5 mm and 3.6 mm; the thickness of the second positive lens M5 is between 2.4 mm and 2.5 mm; the thickness of the fourth negative lens M6 is between 1 mm and 1.1 mm; the thickness of the third positive lens M7 is between 1.4 mm and 1.5 mm; the thickness of the fourth positive lens M8 is between 0.9 mm and 1 mm; the thickness of the fifth positive lens M9 is between 1.2 mm and 1.3 mm; and the thickness of the fifth negative lens M10 is between 0.8 mm and 0.9 mm.
[0035] In the embodiment, the air gap between the first negative lens M1 and the second negative lens M2 is between 3 mm and 3.1 mm; the air gap between the second negative lens M2 and the third negative lens M3 is between 2.9 mm and 3 mm; the air gap between the third negative lens M3 and the first positive lens M4 is between 2.4 mm and 2.5 mm; the air gap between the first positive lens M4 and the second positive lens M5 is between 3.1 mm and 3.2 mm; the air gap between the second positive lens M5 and the fourth negative lens M6 is between 0.6 mm and 0.7 mm; the air gap between the fourth negative lens M6 and the third positive lens M7 is between 0.5 mm and 0.6 mm; the air gap between the third positive lens M7 and the fourth positive lens M8 is between 2.2 mm and 2.3 mm; the air gap between the fourth positive lens M8 and the fifth positive lens M9 is between 0.8 mm and 0.9 mm; and the air gap between the fifth positive lens M9 and the fifth negative lens M10 is between 1.1 mm and 1.2 mm.
[0036] In the embodiment, the air gap between the diaphragm surface T and the fourth positive lens M8 is 1 mm.
[0037] In the embodiment, the material of the first negative lens M1 is K9; the material of the second negative lens M2 is H-ZF52; the material of the third negative lens M3 is H-ZF4A; the material of the first positive lens M4 is H-ZF52; the material of the second positive lens M5 is H-QK3L; the material of the fourth negative lens M6 is H-ZF73; the material of the third positive lens M7 is H-ZK3; the material of the fourth positive lens M8 is H-BAK7; the material of the fifth positive lens M9 is H-ZPK5; and the material of the fifth negative lens M10 is H-ZF73.
[0038] In this embodiment, the imaging spectral range of the optical system is between 450 nm and 750 nm. The field of view of the optical system is 90°. The resolution of the optical system at 1 m is 1.1 mm.
[0039] The optical system described in this embodiment takes a working distance of 1m as an example, and the parameters of the optical system embodiment are given as shown in Table 1.
[0040] Table 1
[0041]
[0042]
[0043] The optical system described in this invention has an imaging spectrum of 450nm to 750nm, a focal length of 5.1mm, and an F-number of 5.1. The object to be located is placed 1000mm to the left of the first negative lens, and the imaging detector is placed 0.96mm to the right of the fifth negative lens. This allows for the capture of an image with a 90° field of view at a position of 1m, and the smallest resolvable object at 1m is 1.1mm, ultimately achieving high-precision binocular positioning.
[0044] like Figures 3 to 6 As shown in the figure, the modulation transfer function curve is shown. 91 lp / mm is the cutoff frequency when the pixel size is 5.5 μm. At this frequency, the modulation transfer function of each field of view is better than 0.3, and the optical system has strong resolution. Figure 4 The image is a dot plot. The average spot radius of the dot plots for each field of view and different wavelengths is smaller than the Airy disk size, indicating excellent imaging quality. Figure 5 The image shows a chromatic aberration pattern. The separation of different colors of light during imaging on the image plane does not exceed 2.5 μm. The chromatic aberration control effect is excellent and meets the requirements of imaging quality. Figure 6 The field curvature distortion diagram shows that the maximum distortion of the optical system does not exceed 0.8%, and the field curvature does not exceed 37μm, which will not cause obvious image distortion and results in excellent imaging performance.
[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0046] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.
Claims
1. A miniature optical system with a large field of view and high resolution for binocular positioning, comprising a target end, an imaging end, and a lens group arranged along the optical axis between the two, characterized in that: The center of the to-be-positioned end, the imaging end and each lens is located on the same optical axis, and the arrangement order of the lens group from the to-be-positioned end to the imaging end is a first negative lens, a second negative lens, a third negative lens, a first positive lens, a second positive lens, a fourth negative lens, a third positive lens, a fourth positive lens, a fifth positive lens and a fifth negative lens. The optical system comprises a diaphragm plane between the third positive lens and the fourth positive lens; the first negative lens, the second negative lens, the third negative lens, the first positive lens, the second positive lens, the fourth negative lens, the third positive lens, the fourth positive lens, the fifth positive lens and the fifth negative lens are all glass spherical lenses. The to-be-positioned end and the imaging end are both perpendicular to the system optical axis.
2. The miniature optical system for binocular positioning with large field of view and high resolution according to claim 1, characterized in that: The focal length of the first negative lens is between -30 mm and -32 mm; the focal length of the second negative lens is between -20 mm and -22 mm; the focal length of the third negative lens is between -15 mm and -17 mm; the focal length of the first positive lens is between 15 mm and 17 mm; the focal length of the second positive lens is between 13 mm and 15 mm; the focal length of the fourth negative lens is between -25 mm and -27 mm; the focal length of the third positive lens is between 6 mm and 8 mm; the focal length of the fourth positive lens is between 80 mm and 82 mm; the focal length of the fifth positive lens is between 16 mm and 18 mm; and the focal length of the fifth negative lens is between -5 mm and -7 mm.
3. The miniature optical system for binocular positioning with large field of view and high resolution according to claim 1, characterized in that: The thickness of the first negative lens is between 1.9 mm and 2 mm; the thickness of the second negative lens is between 1.9 mm and 2 mm; the thickness of the third negative lens is between 1.5 mm and 1.6 mm; the thickness of the first positive lens is between 3.5 mm and 3.6 mm; the thickness of the second positive lens is between 2.4 mm and 2.5 mm; the thickness of the fourth negative lens is between 1 mm and 1.1 mm; the thickness of the third positive lens is between 1.4 mm and 1.5 mm; the thickness of the fourth positive lens is between 0.9 mm and 1 mm; the thickness of the fifth positive lens is between 1.2 mm and 1.3 mm; and the thickness of the fifth negative lens is between 0.8 mm and 0.9 mm.
4. The miniature optical system for binocular positioning with large field of view and high resolution according to claim 1, characterized in that: The air gap between the first negative lens and the second negative lens is between 3mm and 3.1mm; the air gap between the second negative lens and the third negative lens is between 2.9mm and 3mm; the air gap between the third negative lens and the first positive lens is between 2.4mm and 2.5mm; the air gap between the first positive lens and the second positive lens is between 3.1mm and 3.2mm; the air gap between the second positive lens and the fourth negative lens is between 0.6mm and 0.7mm; the air gap between the fourth negative lens and the third positive lens is between 0.5mm and 0.6mm; the air gap between the third positive lens and the fourth positive lens is between 2.2mm and 2.3mm; the air gap between the fourth positive lens and the fifth positive lens is between 0.8mm and 0.9mm; the air gap between the fifth positive lens and the fifth negative lens is between 1.1mm and 1.2mm.
5. The miniature optical system for binocular positioning with large field of view and high resolution according to claim 1, characterized in that: The air gap between the diaphragm plane and the fourth positive lens is 1mm.
6. The miniature optical system for binocular positioning with large field of view and high resolution according to claim 1, characterized in that: The first negative lens material is K9; the second negative lens material is H-ZF52; the third negative lens material is H-ZF4A; the first positive lens material is H-ZF52; the second positive lens material is H-QK3L; the fourth negative lens material is H-ZF73; the third positive lens material is H-ZK3; the fourth positive lens material is H-BAK7; the fifth positive lens material is H-ZPK5; The fifth negative lens material is H-ZF73.
7. The miniature optical system for binocular positioning with large field of view and high resolution according to claim 1, characterized in that: The imaging spectral range of the optical system is between 450nm and 750nm.
8. The miniature optical system for binocular positioning with large field of view and high resolution according to claim 1, characterized in that: The field of view angle of the optical system is 90°.
9. The miniature optical system for binocular positioning with large field of view and high resolution according to claim 1, characterized in that: The resolution of the optical system at 1m is 1.1mm.