High-pass Filters are transmissive approximately50% at the nominal cutoff wavelength,>99% at wavelengths50 nm higher than the cutoff, and less than0.1% at50 nm lower than the cutoff.

• 高通滤光片在设定的截止波长上可通过大约50%25，波长比截止波长大50微米时可通过99%25以上，波长比截止波长小50微米时将只能通过0.；1%25以下。