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English Views: 65 Author: Site Editor Publish Time: 2021-11-29 Origin: Site
The door eye viewer (cat's eye) is very important, which can let people see people and things outside the door through the door peephole viewer behind the door when the situation is not clear outside. Generally, the installation of cat's eye is not included in the entrance door when people enter the house and the house is at the time of delivery. So how to install cat’s eye?
The custom eye peephole is a small optical instrument installed on the door of a house, which is convenient for residents to observe the outdoor situation. It is composed of concave lens (objective lens) and convex lens. Door spy hole viewer allows people to see things outside without opening the door, so it has become a necessity for home safety.
Buy one’s favorite wide angle door peephole first. Measure the inner diameter of the door peep-hole, then go to buy a hole opener. Pay attention to hold the electric drill tightly when the hole is opened, and do not scratch the anti-theft door paint. In fact, there is unnecessary to install them by oneself, because the host also needs to prepare electric hand drills and other tools, which ordinary families will not prepare or use. So if the front door peephole viewer is bought back, it is recommended to find a professional craftsman to install it.
Check the appearance and quality of cat's eye and make sure it is correct. Clear the cat's eye hole on the gate so that it can be installed smoothly. Screw off the nut of the cat’s eye to separate the eye from the hole tube and start the installation. There is a pipe inside the door and another one with a lens outside.
First push the protruding cat's eye into the hole from the front of the door (the door seen from the outside of the door) to the bottom. Then, push the flat cat eye covered by a shield from the back of the door (the inside side) into the cat’s eye outside the door. Fix the outside cat’s eye with one hand and the cat’s eye inside the house with the other hand, then screw the two hole pipes together until they are tightened. Finally, all angles are observed to ensure the installation quality from the inside and outside of the door. Then the installation is complete.
After installation, the order of the inside of the cat eye is that the eyepiece is at the innermost part of the tube, then the plane concave lens 1 (concave face to objective lens), concave lens 2 (concave face to objective lens) and objective lens. After assembly, the effect is as shown in the figure.
Normal young people can see clearly about 10cm away from the eyepiece. But normal people can see clearly only when they are about 40cm away from the eyepiece when they are 50 years old.
(1) Be careful not to damage the lens when the lens covers are screwed.
(2) Note that if the lens is dirty, gently wipe it with a cloth.
Finally, it should be noted that the flat lens is installed in the door, and the convex lens is installed outside the door. Be sure to tighten it. In order to ensure that it can be tightened, be sure to hold the outer cat’s eye and the inner cat’s eye.
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