What Wavelength Does Red Laser Safety Glasses Protect Against?

With the widespread application of laser technology in industrial manufacturing, medical aesthetics, scientific research, and other fields, laser safety glasses have become increasingly popular as essential eye protection against laser radiation. Red laser safety glasses are commonly used in various applications, but many people wonder: What laser wavelengths do red laser safety glasses protect against? In this article, we will explain how red laser safety glasses work, what laser wavelengths they typically block, and when they should be used.

1. How Laser Safety Glasses Work

Laser safety glasses are designed to absorb or block specific laser wavelengths to prevent eye damage. The color of the lenses isn't just cosmetic; it indicates the wavelength range the glasses are designed to protect against.

2. What laser wavelengths do red laser safety glasses block?

Red laser safety glasses are typically designed to block green, blue, and violet lasers, which have shorter wavelengths in the 400-550nm range. These include: 405nm (violet laser), 450nm (blue laser), and 532nm (green laser). Some red laser safety glasses can also protect against ultraviolet lasers such as 266nm and 355nm, such as our LP-GHP laser safety glasses from LaserPair (protection range: 180-540nm, OD 5+).

These wavelengths are commonly used in medical, industrial, and research environments. Red lenses can filter out higher-energy, shorter-wavelength beams, making them less visible or invisible to the human eye, thereby reducing the risk of retinal damage.

3. When should red laser safety glasses be used?

Wear red laser safety glasses when using the following devices:

①Green laser pointers or measuring tools (532nm)

②Blue laser engraving or cutting systems (450nm)

③Violet/UV laser diodes (405nm)

④Any visible laser with a wavelength between 400-550nm

Important: It is important to confirm the optical density (OD) rating and exact wavelength range marked on the instructions for laser safety glasses or other laser protection products to ensure they match the operating wavelength of the specific laser equipment being used for effective protection.

4. Lasers Not Blocked by Red Laser Safety Glasses

Red lenses are not suitable for blocking the following lasers:

①Red lasers (e.g., 650-670 nm)

②Infrared lasers (e.g., 808 nm, 1064 nm)

③Far-infrared or CO2 lasers (10,600 nm)

Wearing inappropriate glasses can result in inadequate protection and serious eye damage.

Conclusion

Red laser safety glasses are ideal for protecting against lasers in the blue-green spectrum (400-550 nm). They are not suitable for use with red or infrared lasers. Before purchasing laser safety glasses, please confirm the specific laser wavelength and power you are using, and select laser safety glasses that meet international safety certification standards to ensure adequate protection.