Laser damage threshold
In applications where there is a strong light source, such as on laser processing equipment, it is necessary to use laser mirrors and optical filters that have high laser resistance. Optical Coatings Japan can produce laser mirrors and optical filters with laser resistance at the top level in the industry.
The laser damage threshold is the fracture limit energy density at which laser-induced damage occurs. It is one of the indices used for the resistance to lasers.
The following introduces the laser damage thresholds of our HR coat (high reflection coat) and AR coat (anti-reflection coat). The laser damage threshold testing was conducted by the Institute for Laser Technology.
● Laser damage threshold in the 1-on-1 method
*1-on-1 method: Irradiation of one pulse on one spot of the sample
● Laser damage threshold in the 1000-on-1 method *1000-on-1 method: Irradiation of a repetitive pulse (1,000 times) on one spot of the sample
In the evaluation of the laser damage threshold by repeated pulse irradiation (1000-on-1, 100 Hz), we also received an industry-leading value of 7.6 J/km2 on a 248 nm HR (high reflection film).
Product introduction: Laser processing, antireflection film, dichroic mirrors