Longpass Filters 

Longpass Filters are precision optical filters designed to transmit wavelengths longer than a specified cut-on wavelength while blocking shorter wavelengths. Featuring a sharp transition from high optical rejection to high transmission, these filters provide excellent spectral performance and minimal signal loss. Manufactured using durable hard-coated thin-film technology or high-quality absorptive glass, they offer outstanding optical stability, long service life, and reliable performance in demanding applications. Longpass Filters are ideal for fluorescence imaging, spectroscopy, laser systems, biomedical instruments, and machine vision applications.