We all know that the shadow is an optical phenomenon, the principle of which is due to the object blocking the light, and the light is not able to penetrate the object and the formation of darker areas, it is called the shadow, the shadow is divided into two categories, respectively, called this shadow and penumbra, this shadow refers to the light blocking, the part of the object behind the completely dark area. The other half of the area is illuminated by light distributed in the area around the principal shadow of the residual shadow, called penumbra.
Shadowless light is the use of light-emitting objects, the larger the area, the smaller the shadow of this feature and was created, the operating table used in the shadowless light is the use of multi-point light source effect, can be multi-directional, multi-angle illumination. Because surgery is often very precise, and the surgical process, may be the hands of medical personnel and the use of medical equipment produced by the shadow of the surgical site will cause interference in the surgical process, the light must be vertically irradiated to the operating parts, so we use shadowless lamp.
The shadowless lamp arranges light disks with high luminous intensity into a circle, synthesizing a large-area light source, so that the light can be directed to the operating table from different angles, with no light dead spots. The surgeon can optimally observe objects with low contrast at different depths in the incision and body cavity. So the shadowless light is not really shadowless, it's just that the penumbra doesn't look obvious under multiple angles of intense light.
Surgical shadowless lamp usually consists of multiple lamp head, was fixed on the cantilever, the surgical process can be freely adjusted angle, light from different angles to the operating table, the surgical process can be adjusted according to the actual situation to adjust the brightness and color temperature of the surgical shadowless lamp, the shadowless lamp in the provision of adequate lighting at the same time, but also can effectively avoid the light shining on the medical equipment produced by the glare.
Because each lamp has a shadow, but their shadows are illuminated by other lights, which ensures that the operating table lighting is sufficient, but does not produce a clear this shadow, in addition, the shadowless lamp can work for a long time will not be hot, and thus will not interfere with the surgical process too much.