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The Magic Of Midwest Optical Systems Bi685-39 Price Crushed By 40% [HurEltTJ]

$57.99 $185.99 -69%

The Magic Of Midwest Optical Systems Bi685-39 Price Crushed By 40% [HurEltTJ] Dark Red Interference Bandpass M39 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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The Magic Of Midwest Optical Systems Bi685-39 Price Crushed By 40% [HurEltTJ]

The Magic Of Midwest Optical Systems Bi685-39 Price Crushed By 40% [HurEltTJ] Dark Red Interference Bandpass M39 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

January 23, 2026

Absolutely no complaints!

An excellent build, feels very solid.

- Blodwen R..

January 23, 2026

Absolutely no complaints!

The quality construction is very evident.

- Zola F..

January 23, 2026

Absolutely no complaints!

This is a very fine and solid tool.

- Zandra W..

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