Machine vision lens with wide working distance and high resolution ratio
A technology with working distance and high resolution, applied in the direction of instruments, optical components, optics, etc., can solve the problems of not being able to give full play to the performance of the camera and the resolution accuracy is not high enough, and achieve the effect of low distortion and high resolution
Pending Publication Date: 2018-12-14
GUANGDONG AOPUTE TECH CO LTD
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Problems solved by technology
However, the resolution accuracy of the existing fixed-focus machine vision lenses in China is generally not high enough, and the performance of the camera cannot be fully exerted when matched with the imaging chip of the small pixel. Therefore, the research and development of high-resolution machine vision lenses is more urgent
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[0019] Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.
[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", horizontal" etc. are based on th...
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The invention discloses a vision lens with a wide working distance and a high resolution ratio. The lens comprises a focusing group GA and a fixing group GB, wherein the focusing group GA and the fixing group GB are arranged in sequence from an objective end to an image surface; the focusing group GA comprises a first lens G1, a second lens G2, a first bonding lens group U1, a second bonding lensgroup U2 and a seventh lens G7; the focal lengths of an optical system, the focusing group GA and the fixing group GB are independently f, fGA and fGB, the combined focal length of the first lens G1,the second lens G2 and the first bonding lens group U is f(G1-G4), and the combined focal length of the second bonding lens group U2 and the seventh lens G7 is f(G5-G7), wherein the above focal lengths independently meet the following relational expression: fGA / f is greater than 1 and less than 1.4, fGB / f is greater than 3 or less than 4, f(G1-G4) / f is greater than 2.0 and less than 2.6, and f(G5-G7) / f is greater than 0.6 and less than 1.0. The lens has the characteristics of high resolution ratio and low distortion and can support the working distance from 0.1m to infinity.
Description
technical field [0001] The invention belongs to the technical field of machine vision, and in particular relates to a wide working distance and high resolution machine vision lens. Background technique [0002] The function of the machine vision system is to use the machine to measure, judge and detect defects on the target parts, so as to reduce or eliminate the misjudgment during human operation, and improve the measurement accuracy and stability. Its core principle is to collect the light signal to the camera through the machine vision lens, and then the camera converts the light signal into an electrical signal to the image processing system, and performs various calculations based on the collected image information to extract the characteristics of the target, and then according to the discriminant The results are used to control the device actions in the field. [0003] On the one hand, in the context of industrial automation, the demand for machine vision is increasi...
Claims
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Login to View More IPC IPC(8): G02B13/00
CPCG02B13/005
Inventor 曾振煌
Owner GUANGDONG AOPUTE TECH CO LTD