The Working Principle And Characteristics Of LED Cold Light Source
The cold light source is the illumination source for endoscopy. Modern light sources have abandoned the original direct illumination method in the body cavity, and use optical fibers to conduct light for illumination.
The working principle of LED cold light source:
Light-emitting diodes are diodes made of semiconductor materials and consist of PN interfaces. When a forward voltage is applied, electrons and holes combine to release energy in the form of photons, so they have light-emitting characteristics. The light source is generated within a millimeter of the PN interface, and the wavelength of the light is different depending on the characteristics of the material, and there are red, yellow, green, and blue light-emitting diodes. The brightness of light-emitting diodes can be adjusted by the size of the operating voltage (current). In a large operating current range, the brightness of the light-emitting diode increases with the increase of the current.
The basic function of the cold light source of the endoscope is to produce cold light, and various endoscopes using fiber-guided light beams can be provided as the light source part to provide brightness illumination for the observation and inspection of the inner cavity. Then add corresponding structures to achieve other functions according to various needs, such as adding air pumps to many medical cold light sources to generate gas, and transmit the gas to the human body through the inner pipe of the endoscope. The human body needs to be inspected. Inflate and pressurize the part to achieve the purpose of opening. At the same time, the air pressure is used to squeeze the water to the lens body to flush the mirror surface and the lesion site for observation, diagnosis and treatment. And according to the gas volume adjustment device. In some cases, in order to eliminate the loosening of images due to actions during observation and diagnosis and treatment, the cold light source also adds a high-speed flash.
Features of LED cold light source:
1. Medical grade LED light-emitting components, strong stability and strong shock resistance.
2. Good color temperature, pure luminous color, no stray light, strong permeability, good color rendering, and strong three-dimensional sense of surgical field of vision.
3. Super long life, no need to replace the bulb frequently, saving the cost of use. It prevents the light bulb from being off during the operation, which affects the progress of the operation, and ensures the quality and safety of the operation.
4. Applicable fields: Minimally invasive surgery equipment in general departments.
5. Simple structure, easy to carry, rechargeable, can be used continuously for 5 hours without external power supply, and can be connected to tube endoscope and hard tube endoscope.
6. Small size, light weight, safer than traditional light sources, more environmentally friendly, and convenient to carry.
