How to choose and install a door eye

The front door is a remedy that separates the personal space inside the house from the outside world. The thicker and stronger the door, the more reliable its protection. However, often the inhabitants of the house just need to find out what is happening outside the door, for example, if someone calls or any extraneous sounds are heard behind it. The easiest way to control the situation is to install a door eye. In the article, we consider the types of door locks and methods of installing them.

Content:

1. The design of the door eye
2. How to choose a door eye?
3. Gear
4. Installation of the door eye
5. Types of door eyes
   • Video-eye
   • Electronic eye

The modern door eye was widespread only in the 1960s. His founding father is considered to be an American scientist, writer and inventor Robert Wood, who in 1906 invented a wide-angle lens of fishing.

However, it took a lot of time before its invention received well -deserved glory, distribution and use in everyday life.

Today you can buy various door eyes not only in shape and size, but also in functionality ..

The design of the door eye

(Fig. 1)

The standard design of the door eye consists of:

• lens aimed at an external object (lens);
• external rail;
• fixators on the sides of the lens;
• the body is the eye;
• internal nut;
• lens directed inward (eyepiece);
• zalka.

Depending on the length of the case, the eye in it can be located from 2 to 15 lenses.

How to choose a door eye?

There are several main factors that must be taken into account when choosing a door eye.

The first and most important factor is the angle of view. The higher this indicator, the higher the level of safety, because not only the person’s face at the door, but also the space below and on the sides, which, in modern, unfortunately, too criminal, is very useful.

• The optimal viewing angle is 180, although often manufacturers make a angle a little more than 200, in order to remove distortion along the viewing boundaries, the same 180 will remain the working spectrum.
• Another trick that manufacturers use to increase the viewing angle is to forward the focus of the lens. A similar design provides a greater overview of space.

The next factor determining the choice of the eye is the width of the door. Depending on this, one of the variants of the eyes is selected:

• standard (if the door is with a thickness of 30 to 55 mm);
• elongated (if the door with a thickness of 55 to 100 mm);
• long (if the door is more than 100 mm thick).

The most common are the eyes of a standard size, they are suitable for any modern metal or wooden doors. Width adjustment is carried out using a thread that is on any eye. However, if the door is insulated outside or from the inside, the usual length of the eye may not be enough.

Tip: When buying an elongated or super -long eye, it is important to pay attention to its optical characteristics, which should differ from the standard option. Unfortunately, many manufacturers, to reduce the cost of the final product, simply complete the standard eye with a long rear nut, without changing the optical characteristics. These actions are fraught with a decrease in the viewing angle, as well as poor visibility of objects.

• In addition to the width of the door itself, it is important to consider the width of the diameter eye. The larger it is, the higher the aperture of the lenses installed in it. The high aperture allows you to clearly see objects, while it is not necessary to approach the eye close, the outer space will be clearly visible from a distance of 5-7 cm from the eye, maintaining a wide angle of view.
• The only additional commentary on the wide diameter can be called that in the future it will no longer be replaced with a narrower one, because The hole for him is respectively wider than the standard.

The material from which the eye is made, is perhaps determining in the final price of the product. There are two main materials for the body of the eyes: metal and plastic. The metal is more durable and resistant to external influences, the plastic can deform or crack, for example, due to temperature changes.

Also different materials for lenses are plastic, ordinary glass or point optics.

• The main disadvantage of plastic optics is its fragility. She is inclined to clutch and deform over time. In addition, plastic accumulates static electricity and attracts dust. All these factors lead to an ambulance, already in the second or third year of operation, the loss of the clarity of the image.
• Glass has no such problems, but it is more fragile compared to point optics. The only disadvantage of glass optics is its higher price compared to plastic. Although, strength and durability will pay off costs with more than.

Gear

The valve has become an integral element of the door, it performs as a passive safety function so that it is not visible whether someone is in the house or not, so the aesthetic function does not penetrate the room from the outside.

• It also allows the observer to freely approach the door and choose to open it on outside people. There is always someone who simply does not want to open the door, without any objective safety factors or good tones.
• Sometimes the role of the valve is performed by the mirror spraying of the lens of the lens. It is quite popular, since the eye does not require additional internal elements, however, a minus can be called reduced image brightness.

Installation of the door eye

The installation is quite simple and does not require special skills. If the door does not have a special opening for the eye, it must be drilled.

• To do this, a place on the door where it will be located is chosen is chosen, masking tape is glued and marking is made.
• Then, on both sides of the door, the hole of the required diameter is drilled.
• On the outside of the door, the tip with a lens is inserted and tightly fastened from the inside.

Types of door eyes

• Panoramic eye. Its distinguishing feature is a lens divided into two lenses. Thanks to this design, the lens takes a larger luminous flux and gives a panoramic image to see which it is not necessary to stand strictly opposite and close to the eye.
• Pulp -knocked eye. The functionality is laid down in the name, provides increased safety.
• Secret eye. It is usually masked for nails in the door decoration. As a rule, this is a design made of microvideo -chamber on the outer door and the receiving device inside.
• Glace for a double door, allows you to view the space without opening the inner door. It has two components.
• Eye-periscimal. In this type, the eye is the lens and the eyepiece are at different levels. This type is very popular in families with children, since it makes it possible to arrange the components so that the eyepieces will be at a level convenient for an adult and at the height of the child’s growth.

Video-eye

In this type, the eye should dwell in more detail, since this model is gaining more and more popular from year to year, which is not surprising in the era of technological progress.

The principle of operation of the door eye with the camera

At one end, a video camera is installed, usually small or microsmers built into the door. She transfers the image to the receiving monitor. The picture can be transmitted both constantly, in real time, and on request.

What is important to consider when choosing a video eye?

• As in the case of a conventional eye, the viewing angle is priority. Thanks to technical solutions and telescopic nozzles, this issue in most cases is perfectly resolved, and video puzzles give a wonderful complete overview of the territory in front of the door.
• Another equally important factor is the sensitivity of the eye to the light. The higher it is, the better the eye sees in scarce lighting. You can clarify this moment in the technical characteristics of the camera built into the door surface.
• According to their device, video eyes are divided into case and innocent. The former are more reliable and durable, and the latter is cheaper and easier in installation.
• Video surveillance can be organized according to one of two schemes below:
  1. the signal is broadcast on the radio channel in the DMV range using the television transmitter to receive it on the TV.
  2. the image is transmitted through the cable directly to the low -frequency exit of the monitor or TV.

• It is better to entrust the video eye to the professionals, since certain knowledge and skills will be required to configure the signal. Also, perhaps, work on laying a cable in the apartment will be needed.
• If there is a desire or need, in addition to video surveillance, to be able to observe through a standard eye, it is worth considering the option of installing a hidden chamber with a lens. Of the advantages, it is worth noting the round -the -clock recording of the territory in front of the door and the ability, if necessary, view this material.

Wireless door wireless

Electronic eye is a type of video eye, in the sense that the image is also transmitted to the monitor and there is no direct observation through the eyepiece.

However, there are differences and very significant:

• The electronic eye consists of a doorbell and video camera, which are attached to the outside of the door, as well as the resident of the display for the inside. When clicking on the call button, the device activates the liquid crystal display, takes a photo and starts the video. The device is equipped with a memory card slot, in the settings you can change the parameters of photo and video recording.
• The electronic eye allows you to see what is happening from the outside at any time, for this it is necessary to activate the LCD display using touch and select the corresponding section of the menu. It can also conduct video recording in case of weak or missing lighting, for this you need to choose the use of infrared backlight in the settings.
• Unlike video glances, the installation of the electronic eye is simply elementary, the place where the standard eye was previously installed is used as a hole, no additional drilling works need to be performed. Wires or other connections will not be needed. This device works for batteries. And its cost is relatively small.

As a completion. The most important thing in the room is its comfort and safety, modern door eyes are able to satisfy the highest requirements of consumers, but no matter how good it is, and no matter how strong the door on which it is located, the main factor remains common sense and caution of the residents.