Double-filter switch with attachment of glass

Abstract

The invention relates to the technical field of security monitoring and particularly relates to a double-filter switch with the attachment of glass. The double-filter switch comprises a switch upper cover, a switch base, a light hole arranged on the switch base, a light filter, a light filter carrier for accommodating the light filter, and a power device. The top of an inner cavity of the switch base is provided with a groove corresponding to the light hole. The groove is internally provided with a protection cover which is made of a transparent material and seals the light hole. According tothe double-filter switch, through setting the transparent cover on the light hole, dust falls on the transparent cover, a bad image caused by the affection of image quality due to the direct falling of dust on a light sensing chip is prevented, the switch base is provided with the groove or a retaining wall, the transparent cover is easy to paste, dispensing can be constrained when the transparentcover is pasted, and the overflow of glue is prevented.

Description

technical field [0001] The invention relates to the technical field of security monitoring, in particular to a glass-attached double-filter light switcher. Background technique [0002] Typically, a lens module includes a lens, a lens mount, a dual filter switcher, a drive circuit, and a photosensitive chip. The main function of the lens is to filter out invisible light, let visible light enter, and project onto the sensor. [0003] The IR-CUT double filter switcher is composed of: filter + power part. The principle of the IR-CUT double filter switcher is through a circuit control board and the switcher. When the daytime light is sufficient, the circuit control board drives the switcher to switch to the infrared cut filter to work, and the switcher restores the true color , when the light is insufficient at night, the infrared cut-off filter is automatically removed, and the full-spectrum optical glass starts to work, which can sense the auxiliary light of the infrared lam...

AI Technical Summary

Problems solved by technology

[0004] However, some cameras that require high precision and small size, in order to reduce the light loss and distortion caused by light waves passing through the light-transmitting component multiple times, remove the lens and directly filter with a double filter switcher. The filter of the double filter It needs to be switched. During the switching process, it is necessary to leave a space for smooth movement. Dust will enter the interior of the module through this space. Most of the existing IR CUT designs on the market are used for security monitoring, and dust protection has not been considered. Design, there is a large gap between the filter carrier of the switcher and the base of the switcher, so that dust is easy to fall directly on the photosensitive chip

Images