650nm Red Band Pass Filter for Imaging

650nm Red Band Pass Filter for Imaging The 650 nm Band Pass Filter wavelength corresponds to standard red diodes and the legacy DVD laser line, thereby facilitating high-contrast imaging under synchronized red illumination. The development of optical storage technology demonstrates that shorter wavelengths (650 nm versus 780 nm) enable tighter focusing and smaller spot sizes—offering valuable insight for selecting appropriate illumination wavelengths in high-resolution inspection applications. Silicon detectors exhibit high responsivity within this range. To ensure spectral stability, it is recommended to specify hard-coated bandpass filters and incorporate angle-of-incidence (AOI)-optimized mechanical designs to mitigate potential blue-shifting effects. Additionally, V-coat or broadband anti-reflection (BBAR) coatings can maintain surface reflectance at ≤0.25–0.5% per surface, thereby maximizing optical throughput.UTE optics accepts various types of customized f…

Cut Off Type Glass Selective Absorption Type Glass Band Pass Filter