How to Install Peepholes on Wooden Doors?

We know that many families will install door peephole on wooden door in order to keep home safe. What is peephole? Usually it is also called cat’s eye or door viewer, which has the common name for door mirrors, and it is usually installed on the iron doors or wooden doors of homes for safety. When someone knocks on the door, people in the house can see the situation outside the door through the small door viewer, and it is very clear when they look outside the house through the door mirror. But looking at the house from outside, it becomes very blurred. It is a way of safety protection.

 

What is the principle of the door viewer on the security door?

 

Like telescopes and microscopes, "cat eyes" are composed of objective lenses and eyepieces. The telescope is composed of two convex lenses, the focal length of the objective lens is longer, and the focal length of the eyepiece is shorter. While the microscope also consists of two convex lenses, the focal length of the objective lens is short, and the focal length of the eyepiece is longer. The "cat's eye" cannot be composed of two convex lenses, because the thickness of the door is about 4cm, and the distance between the objective lens and the eyepiece is about 3cm, which also determines that the focal length of the objective lens and the eyepiece cannot be longer, otherwise the "cat's eye" cannot be achieved to the required effect. So, how to install the door viewer on the wooden door?

 

Installation method of wooden door peephole

 

We know that it is easy to remove the cat's eye. Firstly, open the door, then press the cat's eye fixed the door outside with one hand, and turn the other hand counterclockwise to remove the cat's eye inside the room. For installation method, you can directly measure the diameter of the door viewer and the thickness of the door leaf before installing, which is the first step of installation.

 

Next, go to shop to choose suitable door viewer and buy your favorite one. Then measure the inner diameter of the door viewer, and buy a hole opener. Here reminder you that be careful to hold the electric drill firmly when making the hole, and don’t scratch the paint on the wooden door. In fact, there is no need to install it yourself. It is recommended to find a professional person to install door viewer. After all, a hole opener also requires a lot of money, and you still need to buy a hand drill. These tools are not used by ordinary households. So, it is more cost-effective to find a professional person to open. It is important point is that you need correctly measure the position of the front and rear panels when opening the holes yourself, otherwise the front and rear openings will be useless if they are not compared with the wooden door. Finally, reminder everyone that there is the cat-eye mirrors on the market now, do not buy wrongly.