Unlock instant, AI-driven research and patent intelligence for your innovation.
a lens
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A lens and lens technology, applied in the field of lenses, can solve the problems of large light pollution, high image noise, low resolution, etc.
Active Publication Date: 2022-02-15
ZHEJIANG DAHUA TECH CO LTD
View PDF7 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0002] At present, the actual aperture of common traffic lenses on the market is mostly F1.5 to 1.8. In low-light scenes, the imaging brightness is low, and the image noise is more, which affects the image clarity. make light pollution
In addition, the resolution of a few lenses with large apertures on the market is relatively low, generally 5 million pixels, and the quality of the captured images is poor.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0094] The focal length f of the lens is 8.52 mm, the aperture Fno is 1.3, and the total length TTL of the lens is about 116 mm.
[0095] The data such as the radius of curvature, central thickness, refractive index nd, and Abbe constant Vd of each lens are shown in Table 1:
[0096]
[0097]
[0098] Table 1
[0099] It should be noted that the face numbers in Table 1 are figure 1 In the schematic diagram of the lens structure shown, the surface numbers of the lenses are from left to right.
[0100] According to the data in Table 1 and related formulas, it can be obtained: |f1*f2 / (f series*f series*3)|=1.00, f1=-9.16mm, f2=23.86mm; The shell number is 68.62; BFL / f system=1.41.
[0101] The lens structure of the embodiment of the present invention is as figure 1 As shown, the lens provided in Embodiment 1 will be further introduced below by analyzing the optical system of Embodiment 1 in detail.
[0102] The optical transfer function is a more accurate, intuitive an...
Embodiment 2
[0105] The focal length f of the lens is 8.6 mm, the aperture Fno is 1.31, and the total length TTL of the lens is 115.8 mm.
[0106] The data such as the radius of curvature, central thickness, refractive index nd, and Abbe constant Vd of each lens are shown in Table 2:
[0107]
[0108]
[0109] Table 2
[0110] According to the data in Table 2 and related formulas, it can be obtained: |f1*f2 / (f series*f series*3)|=1.30, f1=-10.25mm, f2=28.28mm; The shell number is 81.61; BFL / f system=1.47.
[0111] The lens structure of the embodiment of the present invention is as figure 2 As shown, the lens provided by this embodiment 2 is further introduced below through a detailed optical system analysis of embodiment 2.
[0112] Figure 4 is the transfer function (MTF) curve of the system, such as Figure 4 , it can be seen that the curve descends smoothly and converges. At 145lp / mm, the MTF value within 8.8mm of y' image height is greater than 0.3. This enables the syste...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention discloses a lens, which comprises a first lens group, a second lens group, a third lens group and an image plane arranged sequentially from the object side to the image side; the lens group satisfies the following condition: 0.8<|f1* f2 / (f system*f system*3)|<1.5; BFL / f system>1.30; wherein, f1 is the focal length of the first lens group, f2 is the focal length of the second lens group, and f system is the system of the lens The focal length, BFL is the distance between the third lens group and the image plane. Since in the embodiment of the present invention, three lens groups are arranged in a specific order from the object side to the image side in the lens, and the lens groups in the lens satisfy: 0.8<|f1*f2 / (f system*f system* 3) |<1.5; BFL / f system>1.30; therefore, the embodiment of the present invention provides a super starlight wide-angle lens.
Description
technical field [0001] The invention relates to the technical field of optical imaging, in particular to a lens. Background technique [0002] At present, the actual aperture of common traffic lenses on the market is mostly F1.5 to 1.8. In low-light scenes, the imaging brightness is low, and the image noise is more, which affects the image clarity. Make light pollution bigger. In addition, the resolution of a few lenses with large apertures on the market is relatively low, generally 5 million pixels, and the quality of the captured images is poor. As the road transportation industry advances towards intelligence, high-definition, and environmental protection, it is necessary for the lens to achieve higher performance. Therefore, it is particularly important to develop a super starlight wide-angle lens with a large aperture and high resolution. Contents of the invention [0003] An embodiment of the present invention provides a lens, which is used to provide a super star...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More