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Essential Midwest Optical Systems Bi685-46 Series [Rl3QJK6u]

$45.99 $147.99 -69%

Essential Midwest Optical Systems Bi685-46 Series [Rl3QJK6u] Dark Red Interference Bandpass M46 Bandpass Interference Filters Bi Series Narrow Interference Bandwidth 20-35nm FWHM; Narrow bandwidth High transmission ?85% Designed for use with laser diodes Ideal wavelength separa

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Essential Midwest Optical Systems Bi685-46 Series [Rl3QJK6u] Dark Red Interference Bandpass M46 Bandpass Interference Filters

Bi Series Narrow Interference Bandwidth


20-35nm FWHM; Narrow bandwidth
High transmission ?85%
Designed for use with laser diodes
Ideal wavelength separation when multiple light sources of similar wavelengths are present
Reflective, mirror-type surface that helps minimize thermal effects
Available in sizes up to 79.5mm sq.

APPLICATIONS: Bi Series are popular for life science and laser analysis applications where only discrete wavelengths need to be passed to maximize system performance.

What Our Customers Say

December 30, 2025

Absolutely no complaints!

Top quality and it works just about perfectly.

- Jaylee V..

December 30, 2025

Absolutely no complaints!

A very good product for its very low price.

- Alonzo W..

December 30, 2025

Absolutely no complaints!

This product is simply and truly very great.

- Brittany G..

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