Day and night monitoring lens with large aperture and large target surface and its imaging method

Abstract

The invention relates to a day-night monitoring lens with large aperture and large target surface, which comprises a first lens group with negative dioptric power, a second lens group with negative dioptric power, The invention relates to an aperture diaphragm, a third lens group with positive refractive power and a fourth lens group with negative refractive power; it also relates to an imaging method of a day and night monitoring lens with large aperture and large target surface. The present invention adopts six groups of thirteen pieces of nearly symmetrical spherical mirrors, all of which use ordinary environmentally friendly spherical glass and adopts multiple sets of doublet lenses to simplify assembly and processing technology. The present invention has large aperture, large target surface, high resolution, and defocus With the advantage of small amount, it can simultaneously form high-definition images in the two spectral regions of visible light and near-infrared, and can better correct various aberrations, and has good optical performance.

Description

technical field [0001] The invention relates to a large-aperture large-target surface day-night monitoring lens and an imaging method thereof. Background technique [0002] With the rapid development of the intelligent transportation industry, the requirements of the traffic control department for the captured image information are constantly increasing. Therefore, in order to meet the continuous improvement of image quality requirements for traffic monitoring, the performance of the intelligent traffic monitoring lens mounted on the camera is also continuously improved. In particular, high-definition day and night lenses with large aperture and large target area should be specially designed for traffic monitoring places such as electronic police and public security checkpoints. Under this special background, major manufacturers at home and abroad have launched high-definition lenses with large apertures of 1.6 or even 1.2 apertures and 2 / 3-inch or even 1-inch CCD target su...

AI Technical Summary

Problems solved by technology

Due to the limitation of small aberration characteristics, it is difficult to satisfy large aperture, large target surface, and wide-spectrum confocal at the same time. At present, many domestic and foreign manufacturers can meet the above conditions at the same time. The lens parameters generally focus on F1.6 and CCD target surface of 2 At the level of / 3-inch, there are a few surveillance lenses with F1.2 and 1-inch CCD target surface on the market, but they basically cannot meet the wide-spectrum confocal, and the spatial resolution is generally not high.

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