Low-cost broad-spectrum optical system of day-night confocal trigger lens

Abstract

The invention relates to a low-cost broad-spectrum optical system of a day-night confocal trigger lens. The optical system is composed of a positive power first lens L1, a negative power second lens L2, a positive power third lens L3, a positive power fourth lens L4 and an optical low pass filter (OLPF) L5, wherein L1, L2, L3, L4 and L5 are sequentially distributed from the object to be shot to an image plane side along an optical axis, and the objects to be shot different in distance can be integrally moved through the lens to achieve clear imaging on the image plane portion. The optical system has the advantages of being capable of enabling visible wave band and near-infrared band to image clearly and simultaneously and being low in cost and suitable for batch production, and the lenses are all spherical lenses and made of common crown glass or flint glass.

Description

technical field

[0001] The invention belongs to the technical field of digital display, in particular to a low-cost wide-spectrum day and night confocal trigger lens optical system. Background technique

[0002] In recent years, with the rapid integration of photographic optics and digital technology, the combination of photoelectric technology has also promoted the rapid development of photographic equipment, the rapid development of micro-processing technology in the electronics industry, the high speed of CPU and the high integration of storage media, making it Can handle larger capacity image information. At the same time, as the CCD of the photosensitive element, CMOS has also achieved smaller size, higher integration, and higher spatial frequency. These are all conducive to the miniaturization of the lens.

[0003] With the development of society, people's awareness of safety precautions has been continuously improved, and night monitoring has gradually been valued b...

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