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A machine vision and lens technology, applied in instruments, installations, optics, etc., can solve problems such as the inability to meet the needs of high-end products, and the number of pixels cannot reach 2.5 million, and achieve the effect of flexible adjustment of the clear aperture to meet the needs of high-end products.
Active Publication Date: 2018-02-13
GUANGDONG AOPUTE TECH CO LTD
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For the domestic machine vision lens with a focal length of 6mm, when the size of the supporting camera chip is 1 / 2", the number of pixels cannot reach 2.5 million, which cannot meet the needs of high-end products.
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[0021] 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.
[0022] 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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Abstract
The invention relates to the technical field of machine vision lenses, in particular to a 6mm fixed-focus machine vision lens. The 6mm fixed-focus machine vision lens comprises a mechanical system andan optical system mounted inside the mechanical system and is characterized in that the optical system sequentially comprises a first lens G1, a second lens G2, a third lens G3, a fourth lens G4, a fifth lens G5, a sixth lens G6, a seventh lens G7 and an eighth lens G8 from the object space to the image space, the focal length of the optical system is f, and f, the focal length f1 of the first lens and the focal length f2 of the second lens satisfy the following relations: 2<|f1 / f|<3, and 1.5<|f2 / f|<2.5; f, the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy the following relations: 4<|f3 / f|<5.5, and 2<|f4 / f|<3.5; the focal length of a first bonding lens B1 is fB1, and fB1 and f satisfy the following relation: 1.5<fB1 / f|<3. By the arrangement of the first lens G1, the second lens G2, the third lens G3, the fourth lens G4, the fifth lens G5, the sixth lens G6, the seventh lens G7 and the eighth lens G8, and the range conditions of the focal lengthsof the lenses, the pixel value of the 6mm fixed-focus machine vision lens can reach 2.5 megapixels when the focal length is 6mm and the size of a corresponding chip is 1 / 2', high-end product requirements are satisfied, and the clear aperture of the 6mm fixed-focus machine vision lens can be adjusted flexibly.
Description
technical field [0001] The invention relates to the technical field of machine vision lenses, in particular to a 6mm fixed-focus machine vision lens. Background technique [0002] Machine vision is a system that uses machines instead of human eyes for measurement and judgment. Mainly through the visual device (ie industrial camera and optical lens), the ingested target is converted into an image signal and sent to the signal processing system. The signal processing system converts the pixel distribution, brightness, color and other information in the image into a digital signal; then the image The processing software performs various operations on these digital signals to extract the characteristics of the target, and then makes measurement and judgment on the ingested target according to the characteristics. [0003] In recent years, with the rapid development of the microelectronics industry, machine vision systems with high resolution and high processing speed have been ...
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