The long wave pass filter has a transmission band of 500-2500 and a cutoff band of 200-665nm
Band selective absorption filter
The long wave pass filter is made of special colored glass. The dopants in the material absorb the spectrum of a specific band and pass through the long wave band. This kind of filter is absorption type and is not suitable for laser.
Model | Transmission band（nm） | Cutoff band（nm） | λtj
| λ0 | Tλ0
| Cut off bandwidth（nm） λT=80%-λT=10% | diameter |
LGP-2001 | 500-2500 | 200-360 | 380±10nm | 500 | ＞85% | 33 | Φ25.4 |
LGP-2002 | 560-2500 | 200-430 | 450±10nm | 560 | ＞85% | 33 | Φ25.4 |
LGP-2003 | 600-2500 | 200-490 | 510±10nm | 600 | ＞85% | 33 | Φ25.4 |
LGP-2004 | 650-2500 | 200-530 | 550±10nm | 650 | ＞85% | 33 | Φ25.4 |
LGP-2005 | 680-2500 | 200-580 | 600±10nm | 680 | ＞85% | 33 | Φ25.4 |
LGP-2006 | 720-2500 | 200-630 | 650±10nm | 720 | ＞85% | 33 | Φ25.4 |
LGP-2007 | 800-2500 | 200-665 | 685±10nm | 800 | ＞85% | 33 | Φ25.4 |
TJ: in this band, t = 50% t λ 0
λ 0: in the band above this wavelength, the transmittance reaches the required value t λ 0
T λ 0: required value of transmittance in transmission band
Cut off bandwidth (nm): the wavelength width when the transmittance increases from 10% t λ 0 to 80% t λ 0
