Monitoring camera with day and night double apertures

Abstract

The invention discloses a monitoring camera with day and night double apertures. The monitoring camera comprises a Fresnel lens, a driven infrared sensor, an automatic switching aperture lens, an image sensor, an infrared auxiliary illumination circuit and an environment brightness detection circuit, and further comprises a low-power-consumption MCU (Micro-programmed Control Unit) and a DSP (Digital Signal Processor) processing chip, wherein the automatic switching aperture lens is arranged in a manner being aligned to the image sensor and the automatic switching aperture lens comprises a lens assembly and a switchable aperture pair; the switchable aperture pair is provided with a daytime aperture and a nighttime aperture, which have different apertures; the aperture of the daytime aperture is smaller than that of the nighttime aperture; an infrared filter is arranged on the surface of the daytime aperture; at the daytime, the daytime aperture is aligned to a lens of the lens assembly; at the nighttime, the switchable aperture pair can be switched into the nighttime aperture; and the nighttime aperture is aligned to the lens of the lens assembly. The monitoring camera with the day and night double apertures disclosed by the invention realizes automatic induction shooting and night vision functions and effectively overcomes the contradiction between daytime field depth and nighttime brightness of a fixed aperture monitoring camera.

Description

technical field [0001] The invention relates to the field technology of outdoor monitoring equipment, in particular to a monitoring camera with day and night dual apertures. Background technique [0002] At present, there are surveillance cameras with night vision function on the market, but the aperture of these cameras is fixed. If the aperture is small at the factory, the brightness at night will be insufficient; if the aperture is large, the depth of field will be too small during the day, which will affect the image quality. However, the existing monitoring cameras with variable apertures need to realize multi-stage aperture switching, the structure is more complicated, the realization is difficult, and the cost is high, which is not conducive to the promotion of high-quality products. Contents of the invention [0003] In view of this, the present invention aims at the deficiencies existing in the prior art, and its main purpose is to provide a monitoring camera with...

AI Technical Summary

Problems solved by technology

[0002] At present, there are surveillance cameras with night vision function on the market, but the aperture of these cameras is fixed. If the aperture is small at the factory, the brightness at night will be insufficient; if the aperture is large, the depth of field will be too small during the day, which will affect the image quality.

However, the existing monitoring cameras with variable aperture need to realize multi-stage aperture switching, the structure is relatively complicated, the realization is difficult, and the cost is high, which is not conducive to the promotion of high-quality products.

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