High Performance Longpass Filter

Longpass filters provide a wide blocking bandwidth, high blocking depth, high transmission and high blocking slope. They are widely used in fluorescence excitation spectrum measurement, Raman spectrum, spectral group and astronomical observation applications. Widely used in imaging optical systems and machine vision systems to eliminate interfering light, the provide improved the imaging quality and sensitivity of the system.

Material:UV Fused Silica

Transmitted Wavefront error:λ/ 4 @ 633 nm

Parallelism:＜ 30 arcsec

Surface Quality:40-20

Diameter Tolerance:＋0.0/-0.1mm

Thickness:2mm ±0.2mm

Central Wavelength (λC)Tolerance:±1%

Transmission Tavg:＞90%

Blocking Depth:OD2

Blocking Slope:＜1%

CA:＞90%

Angle of Incidence:0°