Ordinary type shadowless lamp adopts metal reflector.
The cold type shadowless lamp adopts glass coated reflector, so that the excess infrared rays can be dispersed through the glass reflector to the heat of the shadowless lamp rear cover.
Currently, most of the cold light surgical shadowless lamps use independent reflective system, water ripple treatment of glass panels and 100W/12V ~ 300W/24V main and secondary bulbs, there are general shortcomings are: low luminous efficiency, high heat, heat radiation is strong, high power consumption, short life of the bulb, high failure rate, the lack of blackout protection measures. There are literature reports that surgical shadowless lamps have caused burns to patients, and there are even literature reports that the current use of surgical shadowless lamps is an important factor in the cause of old eyesight of the surgeon.
Surgical shadowless lamp principle:
Shadowless lamp, generally used in the operating room or some night work special lamps, which is the principle of light refraction, and dilute the shadow. Electric light is by a curved filament in the light, not limited to a point. The light from one point is blocked by the object, and the light from some other point is not necessarily blocked.
Shadowless lamps, generally used in operating rooms or some special lamps for night work, in which the principle is that the light refracts each other and washes out the shadow.
The electric lamp is a curved filament in the light, not limited to one point. The light coming from this one point is blocked by the object, and the light coming from some other points is not necessarily all blocked. Obviously, the larger the area of the luminous object, the smaller the present shadow. If we light a circle of candles around the above tea canisters, this time the shadow completely disappeared, the penumbra is also too faint to see. Scientists based on the above principle made a shadowless lamp for surgery.
Because of the linear propagation of light, when light shines on an opaque object, a shadow is formed behind the object. Shadows vary from place to place and time to time. For example, the shadow of the same person in sunlight is longer in the morning and evening and shorter at noon.
By observation, we can see that the middle part of the shadow of an object under electric light is especially dark, and the surrounding area is slightly lighter. We call the middle part of the shadow especially dark, and the surrounding gray part we call it penumbra. These phenomena are closely related to the principle of linear propagation of light.
Shanghai Rihana Medical Equipment Co.