CCJC OPTICS

Types of Optical Coatings & Their Applications

2026-05-15 09:15

1. Anti-Reflection Coatings (AR Coatings)

Function: Reduce surface reflection, increase light transmission, eliminate ghost images and glare.

Applications: Camera lenses, eyeglass lenses, microscope/telescope optics, display windows, smartphone camera modules.

Function: Achieve ultra-high reflectivity for specific wavelength bands.

Applications: Laser resonator mirrors, optical beam steering mirrors, telescope reflectors, laser cavity components.

Bandpass Filter Coatings: Transmit only a narrow wavelength range; used in spectroscopy, biomedical instruments, laser communication.
Longpass / Shortpass Filter Coatings: Block shorter/longer wavelengths; used in machine vision, infrared detection, camera IR-cut filters.
Dichroic Coatings: Split or combine different color light; used in projectors, RGB lighting, optical imaging systems.
Notch Filter Coatings: Block a specific laser line wavelength; used in spectral analysis and laser noise suppression.

Function: Divide incident light into reflected and transmitted light at a fixed ratio.

Applications: Interferometers, optical measurement instruments, laser beam splitting, optical imaging systems.

Function: Separate or control s-polarized and p-polarized light.

Applications: Optical isolators, polarizers, laser systems, liquid crystal display (LCD) optics.

Function: Protect optical substrates from scratches, moisture, oxidation and harsh environments.

Applications: Outdoor optical windows, metal mirror surface protection, industrial and aerospace optical components.

Function: Combine optical transparency with electrical conductivity.

Applications: Touch screens, electromagnetic shielding windows, aerospace optical glass.

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