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What is laser?
Laser, also known as "light stimulated radiation amplification", is a type of radiation that amplifies or enhances light energy through specific devices. The generation of laser is based on the principle of stimulated radiation amplification of light. By exciting atoms or molecules in matter, they release light with the same properties as the incident light when transitioning from a high energy level to a low energy level, thereby achieving the amplification of light energy. Laser has the characteristics of good directionality, high brightness, and good monochromaticity, which make it widely used in many fields.

What is a laser filter?
Laser filter is an optical component designed for filtering laser beams. Its function is to filter out unwanted scattered light and absorption parts in the beam, improve laser purity, optimize laser power distribution, and protect the laser and optical system from damage caused by high-power laser. Laser filters are generally made of multiple substrates, coatings, or a combination of both, capable of reflecting a set of wavelengths and allowing transmission of all other light rays. Generally divided into bandpass filters, cutoff filters, neutral density filters, etc. Different film structures and optical material designs have varying degrees of control over laser beams.

Application of laser filter
Laser filters play an important role in many fields. In the medical field, laser filters are widely used in devices such as laser retinal treatment and laser beauty, ensuring the safety and effectiveness of treatment by filtering out harmful wavelengths. In the field of scientific research, laser filters are used in experimental devices such as spectroscopy, quantum physics, and biology to obtain purer and more stable laser sources and improve the accuracy of experimental data. In the industrial field, laser filters are used in laser cutting, welding, marking and other equipment to improve processing accuracy and efficiency, and reduce material loss.