There are many abbreviations for optical filters terminology. The most frequently used abbreviations are:
1. Spectral characteristics types
- BP: Bandpass
- NBP: Narrow bandpass
- CWL: Central wavelength
- FWHM: Full Width at Half Maximum
- LP: Longpass
- SP: Shortpass
- UV: Ultraviolet
- VIS: Visible light
- IR: Infrared light
- NIR: Near Infrared light
- ND: Neutral Density
- VND: Variable Neutral Density
- AOI: Angle of incidence
- Tavg: Average transmission
- Tp: Peak transmission
- OD: Optical Density
2. Optical Coating Films types
- AR: Anti-Reflection coating
- BBAR: Broadband AR coating
- HR: High Reflection coating
- HT: High Transmission
- IR-CUT: Infrared Cut-off
- AF: Anti-Fingerprint coating
3. Polarization type Filters
- PL: Polarizer
- LPL: Linear Polarizer
- CPL: Circular Polarizer
4. Common Naming Examples
- LP800: 800nm Longpass filter
- SP400: 400nm Shortpass filter
- IR650AR: 650nm IR-CUT filter with AR coating
- ND2: Neutral Density filter with 50% of light passes thought.
- NBP650-40: 650nm Narrow bandpass filter, 650nm CWL, 40nm FWHM
If want to learn more about the common abbreviations for optical filters, please contact our sales representatives.