The principle of the operating room shadowless lamp is to eliminate the visual influence of the umbra.
Simply put, if we light a candle next to a tube, the umbra of the tube will be particularly obvious, but if we light another candle next to this candle, two overlapping but non-overlapping candles will be formed. Shadow, this part of the dark shadow is also called the umbra.
But if you order three, four, and five on this basis, the umbra will gradually shrink, and if you circle the candle next to the tube, the umbra will disappear completely.
The shadowless lamp uses this principle to arrange the ones with higher luminous intensity on the lamp panel to form a circle, which becomes a large-area light source, which can meet the needs of surgery.
The surgeon in the operating room must be able to accurately distinguish contours, colors, and movements. Therefore, as a surgeon, a light intensity close to the quality of daylight is required. The light of 100,000 lux is determined to be equivalent to the brightness of the sun at noon.
In addition, in the surgical environment, most of the light is absorbed rather than reflected, which means that the surgical shadowless lamp must provide greater brightness.
The shadowless lamp can produce a maximum brightness of 150,000 lux, and the brightness can be adjusted steplessly. Only under this brightness, the surgeon can have 50% visible light in the operation area.
Bright light will be accompanied by heat generation. If heat is generated during the operation, it will bring great harm to the surgeon and the patient. Therefore, what is needed during surgery is lighting with only light and no heat.
