601 - 700nm Bandpass Filter

601 - 700nm bandpass filters are designed to transmit selected visible to deep-red wavelengths within this specific range while reducing unwanted out-of-band light and background noise. Operating in this spectral region is important for isolating key laser emissions—such as 632.8nm Helium-Neon (HeNe) lasers or common diode lasers—and capturing targeted fluorescence signals without interference.

Applications:

• Fluorescence microscopy and flow cytometry for isolating emission signals from red fluorophores such as Cy5 and Alexa Fluor
• Laser systems and metrology for isolating 632.8nm HeNe lasers in interferometry and optical alignment setups
• Raman spectroscopy for capturing specific Stokes-shifted Raman signals when excited by green or red lasers

Bandwidth options:

• 3nm to 400nm FWHM for isolating targeted visible to deep-red bands between 601nm and 700nm

Select the bandwidth based on the source spectrum, target signal, detector sensitivity, blocking range, and required signal level.