First, the influence of light source on biology
Change behavior patterns: Strong light will attract wild animals and change their behavior patterns.
Affect migration: some animals migrate by astronomical observation, and strong light will interfere with their sense of direction and make them lose their way.
Influence biological clock: Strong light will interfere with the biological clock of animals, leading to circadian rhythm disorder such as sleep, diet and reproduction.
Affect vision: Some animals' visual systems are very sensitive to strong light, and light sources will interfere with their visual activities.
Affect the ecosystem: light pollution will affect the balance of the ecosystem, such as the growth and reproduction of insects and plants, thus affecting the entire food chain.
Second, the types and characteristics of light sources
Incandescent lamp: simple structure, good color rendering, used in places with low illumination.
Fluorescent lamp: suitable for places with low hanging height and high illumination requirements, especially places that need to correctly identify colors.
Tungsten halogen lamp: suitable for places with high illumination, good color rendering and no vibration, but easy to heat and explode. It is recommended to switch to LED.
High pressure mercury lamp: there are two kinds of external ballast and self-contained ballast, which save electricity, resist vibration and start slowly.
High pressure sodium lamp: golden white light, power saving, long life and strong fog permeability.
Metal halide lamp: good color rendering, suitable for large area and high illumination places.
Application of light source in medical field
1, lighting
In the operating room, emergency room, consulting room and other places, it is necessary to use bright and soft light sources to provide doctors with sufficient lighting, so that they can clearly observe the patient's condition and perform surgical operations.
2, disinfection
Ultraviolet light source can be used for disinfection and sterilization. For example, in operating rooms and wards, ultraviolet lamps are used to disinfect air and surfaces.
Step 3 deal with
Some types of light sources are used to treat some diseases, such as LED lights to treat acne and dermatitis, blue light to treat neonatal jaundice, and infrared light to relieve joint pain.
Step 4 diagnose
Some light source technologies, such as fluorescence spectrometer, can be used to diagnose diseases. They can detect biochemical changes inside the body and help doctors diagnose diseases more accurately.
5. Pathological research
Light source also plays an important role in pathological research. For example, using a fluorescence microscope, researchers can observe tiny changes in cells and tissues so as to detect and study diseases at an early stage.
6. Optical instruments
Many medical devices rely on light sources, such as optical microscopes, endoscopes, laser therapy devices, etc. These all require a specific type of light source to work properly.