Method and device for realizing electronic door viewer

Abstract

A first solution of the invention discloses a method for realizing an electronic door viewer. The method comprises the steps of S1, capturing an object image in front of the electronic door viewer; S2, processing the captured object image for obtaining a parallel light image; S3, transmitting the parallel light image to a receiving device; and S4, displaying the captured object image in a display device. A second solution of the invention discloses a device of the method for realizing the electronic door viewer, wherein the device comprises an object lens assembly, a parallel light tube, an ocular lens and an image sensor. The object lens assembly can perform processing on the captured object image for obtaining the parallel light image. The parallel light image is directly transmitted to the ocular lens through the parallel light tube. The object image is finally captured by the image sensor. The method and the device settle a problem of no easy length adjustment in a traditional optical door viewer and furthermore realize advantages of no easy damage and easy maintenance.

Description

technical field [0001] The invention relates to the technical field of security equipment, in particular to a method and device for realizing an electronic peephole. Background technique [0002] The cat's eye, also known as the door eye, is a small optical instrument installed on the door of a residential house, used to observe the outdoor situation, and is a necessity for home safety. The traditional cat's eye is composed of a concave lens and a convex lens. Looking out through the peephole from the room, you can see a certain range of scenes outside the door, but you can't see anything in the room through the peephole from outside the door. Such as figure 1 As shown, when we look out from the inside of the door, the objective lens L1 is a concave lens, the eyepiece L2 is a convex lens, the focal length of the objective lens L1 is extremely short, and it turns the outdoor people or objects AB into a very small upright virtual image A'B' , this image just falls within th...

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art above, the present invention provides the first technical solution: a realization method of an electronic cat's eye, which fundamentally changes the structure of the existing traditional cat's eye and the electronic cat's eye, so as to solve the problems of the existing traditional cat's eye and the electronic cat's eye. The problem

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