Shadowless lamps are essential lighting equipment in hospital operating rooms, which are of great help to surgical safety, efficiency, quality, continuous work of the surgeon, and eye protection.

Shadowless lamps are used to illuminate the surgical site for better observation of small objects with low contrast and different depths in the incision and body cavity.

Due to the possibility of shadows being left on the surgical site by the surgeon’s head, hands, and instruments, the surgical shadowless lamp is designed to eliminate shadows and reduce color distortion to a relatively low level.

In addition, the shadowless lamp can continue to work without dissipating heat, and will not dry the area in the surgical area.

So, what is the working principle of a shadowless lamp? Let’s take a look together!

Due to the propagation of light along a straight line, shadows are formed when the light shines on an object. The shadow varies at different times and places, for example, a person’s shadow in the sunlight is shorter at noon and longer in the morning and evening.

The shadow of an object under an electric light is particularly dark in the middle, called the umbra, and the gray parts around it are called the penumbra. These phenomena are closely related to the linear propagation of light.

It is obvious that the larger the area of the light source body, the smaller the umbra. Fluorescent lamps have a larger luminous area than incandescent lamps, and the umbra of objects under fluorescent lamps is very small. Therefore, the shadow under fluorescent lamps is not obvious, while the shadow under incandescent lamps is very clear. When we light up an incandescent lamp around us, the umbra will completely disappear and the penumbra will also be invisible. People have made shadowless lamps based on the above principles.

A shadowless lamp is a circular arrangement of several lamps with high luminous intensity on a lamp panel, forming a large area of light source. In this way, there will be different angles of light shining on the operating table, which does not produce obvious umbra and ensures sufficient brightness of the surgical field of view, so it is called a "shadowless lamp".

Xinhao Medical provides professional services Shadowless lamp handle cover ， It can better protect the shadowless lamp. If you need it, remember to contact us.