Long Pass Filters

Long Pass filters block wavelengths lower than the specified edge wavelength and transmit wavelengths higher than the edge up to a maximum wavelength.

Iridian’s LPFs have a very steep edge making them suitable for Raman applications or wherever a very sharp transition between the transmitted and the blocked wavelengths is required. In addition, these LPFs have a low ripple in the passband to meet the demanding specifications of spectroscopy instruments.

Graph	Laser Line [nm]	Edge Steepness: OD 6 - 50% [nm]	Edge Steepness: OD 6 - 50% [cm-1]	Pass Band [nm]	Product
	405	2	120	410 - 1200	405 LPF
	442	1.9	100	447.3 - 1200	442 LPF
	457.9	2	100	463.5 - 1200	457 LPF
	476.4	2.1	90	481.7 - 1200	476 LPF
	488	2.1	90	493.3 - 1200	488 LPF
	514.5	2.2	80	520.2 - 1200	514.5 LPF
	532	2.3	80	538.4 - 1200	532 LPF
	632.8	2.7	70	640.4 - 1200	632.8 LPF
	650	2.8	70	657.8 - 1200	650 LPF
	676.6	2.9	60	684.1 - 1200	676 LPF
	752.5	3.3	60	761.1 - 1200	752 LPF
	785	3.4	50	794.5 - 1200	785 LPF
	830	3.6	50	840 - 1200	830 LPF