What Are Notch Filters?

Notch filters play a crucial role in precision optical applications by selectively rejecting specific laser lines while allowing other wavelengths to pass through. Traditional hard-coated thin-film notch filters excel in blocking laser lines with exceptional depth and maintaining high transmission rates, yet they are limited by their passband range. Advancements in filtering technology address this, like Semrock's E-grade StopLine notch filters.
These filters combine the exceptional reliability and performance of hard-coated thin-film filters with an extended passband range, bridging the gap previously filled by less efficient holographic and Rugate filters. Discover how the E-grade StopLine notch filters set a new standard in optical clarity and versatility.
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