An infrared induction switching zoom lens and its imaging monitoring method

A zoom lens and infrared sensing technology, which is applied in installation, optics, instruments, etc., can solve the problems such as the reduction of infrared transmittance of the optical system, and achieve the effect of improving infrared light transmittance, reducing image noise, and clear and clean pictures
CN102269855AInactive Publication Date: 2011-12-07SHENZHEN PROTRULY ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHENZHEN PROTRULY ELECTRONICS CO LTD
Publication Date
2011-12-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an infrared induction switching zoom lens and an imaging monitoring method thereof. The lens includes a mechanically connected infrared filter, a switching device, and a focusing lens group; in the visible light mode, the infrared filter is moved into the optical system of the lens through the switching device , used to block infrared light; in the infrared light mode, the infrared filter moves out of the optical system of the lens through the switching device; the focusing lens group is associated with the infrared filter, and is used to correct the optical system for focus shift. Due to the use of the focusing lens group to switch the optical system where the focal point shifts, only one infrared filter can be used to switch between the visible light mode and the infrared light mode, thereby avoiding the problem caused by the characteristics of crystal and other materials. The infrared transmittance of the optical system in night vision is only 90%, which improves the infrared light transmittance of the optical system at night; increases the brightness of the imaging monitoring screen, reduces image noise, and makes the screen clearer and cleaner.
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Description

technical field

[0001] The invention relates to the field of imaging monitoring equipment with infrared light induction. More specifically, the improvement relates to an infrared induction switching zoom lens and an imaging monitoring method thereof. Background technique

[0002] With the development of infrared LED technology, the current monitoring industry uses infrared LED lamps as auxiliary light sources for night monitoring; the light is divided into ultraviolet light, visible light and infrared light. The wavelength of visible light is between 420-720nm, and infrared light refers to It is light with a wavelength greater than 720nm. Outdoor natural light can be used as a light source during the day, in order to ensure the color authenticity of CCD (Charge-coupled Device, charge-coupled device) imaging, only the visible light part is kept to be imaged on the CCD through the optical system; when infrared light is used as a light source at night, infrared light is also ne...

Claims

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