Surgical shadowless lamp is an essential medical lighting equipment in surgery. With the continuous development of medical technology, various performance indicators of surgical shadowless lamps are also continuously improved to meet doctors’ higher and higher requirements for surgical shadowless lamps.
The world’s earliest surgical shadowless lamp was invented by French professor Welland in England in the 1920s. He placed a 100-watt light bulb at the center of the refractive lens formed by evenly placing many narrow flat mirrors on the dome of the shadowless lamp, so the entire shadowless lamp is in the shape of a cone that eliminates the spire.
The second reform of the shadowless lamp was the single-lamp shadowless lamp in France and the track-type shadowless lamp in the United States in the 1930s and 1940s. The light source at that time was an incandescent light bulb. The maximum power of the light bulb could only reach 200 watts. The area around the filament was too large to control the light path and it was difficult to focus.
By the 1950s, in order to improve the illuminance of shadowless lamps, hole-type multi-lamp shadowless lamps were successively produced and used in Europe and Japan. This type of shadowless lamp increases the number of light sources, and uses high-purity aluminum as a small reflector to increase the illuminance of the shadowless lamp. However, due to the increase in the number of bulbs of this type of shadowless lamp, the temperature of the shadowless lamp rises rapidly, which is likely to cause discomfort to the doctor and dry tissue at the surgical site, which is not conducive to the postoperative recovery of the patient.
In the early 1980s, Daily began to produce cold light hole-type surgical shadowless lamps with halogen light sources. In the late 1980s and early 1990s, the overall reflective surgical shadowless lamp came out. This shadowless lamp uses computer-aided design technology to design the curved surface of the reflector, and the curved surface is formed by industrial stamping to form a polygonal reflector. The light source of this shadowless lamp is not only as bright as sunlight but also has no shadows.
In the 21st century, the details of surgical shadowless lamps have been continuously optimized. In addition to the improvement of basic performance parameters such as illuminance, shadowless intensity, color temperature, and color rendering index, there are also strict requirements for the uniformity of illuminance. In recent years, LED light sources have been used in the medical industry, which has also brought new opportunities for the development of surgical shadowless lamps.
In recent years, LED shadowless lamps are slowly occupying the market. It has excellent cold light effects, excellent light quality, stepless adjustment of brightness, uniform illumination, no screen flicker, long life, energy saving and environmental protection.
Post time: Jul-26-2023