Surgical shadowless lamps are one of the most important medical instruments in the operating room. They provide sufficient lighting to the surgical site during the operation and have ”shadowless effect.” It is used in various operating rooms, such as outpatient, emergency operating room, compound operating room, digital operating room, etc., or all kinds of clinics that need to meet the requirements of surgical lighting.
Why is the shadowless lamp “no shadow”?
Shadow is an optical phenomenon. It is a darker area formed by objects that block the propagation of light and cannot pass through opaque objects.
Shadows are divided into umbra and penumbra. The dark area formed by the space behind the object’s backlit surface is not illuminated by light at all is called the umbral area; the other part of the space area is illuminated by some light and distributed around the umbral area, called the semi-shadow area. Shadow area. The larger the area of the luminous object, the smaller the umbra. Scientists made a shadowless lamp for surgery based on the above principles. It arranges the lamps with high luminous intensity into a circle on the lamp panel to form a large-area light source. In this way, light can be irradiated onto the operating table from different angles, which not only ensures sufficient brightness of the surgical field of view, but also does not produce obvious umbra, so it is called a shadowless lamp.
The surgical shadowless lamp is mainly used to illuminate the surgical site, so that the medical staff can best observe the different depth, small, low-contrast objects in the incision and body cavity. Since the head, hands, and instruments of the operator may cause interference shadows on the surgical site, the surgical shadowless lamp should be designed to eliminate shadows as much as possible and minimize color distortion.
Post time: Dec-27-2021