Machine Vision Lenses and Optics - STEMMER IMAGING


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MidOpt Bandpass Filters

BP, BN and Bi series

The bandpass filters from MidOpt are available in UV, Vis and NIR passbands and achieves optimal contrast. They improve the system control, repeatability and stability. By blocking interfering wavelength, MidOpt bandpass filters eliminates the need for shrouds. They also provide an increased resolution by reducing the chromatic aberration. The anti-reflection coating offers maximum transmission. In addition to the standard sizes and shapes, custom filters are also possible.

Bandpass filters can be used in a variety of industries, including machine vision, factory automation, security and surveillance, license plate recognition, medical and life science, agricultural inspection, aerial imaging, motion analysis, photography and cinematography.

The StablEdge® design reduces the angular dependency and minimizes short-shifting effects.

BP Series – Broad Bandwidth

The BP Series is designed with a broad, Gaussian passband to mimic and accommodate the entire output of the most common LED wavelengths. The glass is double side polished for exceptional parallelism and optical flatness.

BP Series are the most popular filters used in machine vision and factory automation systems and are a critical element in fluorescence imaging.

BN Series – Narrow Bandwidth

Designed for use with laser diodes and LEDs in applications with overwhelming ambient light. The glass is double side polished for exceptional parallelism and optical flatness.

BN Series are popular in outdoor applications where sunlight is present (ex. license plate recognition and security surveillance) and also in fluorescence applications to prevent cross-talk while blocking excitation illumination and ambient light.

Bi Series – Interference Bandwidth

The Bi Series is designed for use with laser diodes

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

Learn more about optical filters in our knowledge base

Show products

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Model Manufacturer Filter type Filter mounting Filter thread Bandwidth (FWHM) Transmittance (wavelength)
MIDOPT FIL BI660/30.5 bandpass mounted M30.5 x 0.5 28 650 - 665
MIDOPT FIL BN520/27 New model Midwest Optical bandpass mounted M27 x 0.5 50 508 - 540
MIDOPT FIL BN630/34 New model bandpass mounted M34 x 0.5 45 625 - 645
MIDOPT FIL BN660/72 New model bandpass mounted M72 x 0.75 45 645 - 675
MIDOPT FIL BN740/72 New model bandpass mounted M72 x 0.75 50 730 - 755
MIDOPT FIL BN785/72 New model bandpass mounted M72 x 0.75 55 770 - 790
MIDOPT FIL BN940/R60X15 New model bandpass unmounted 55 928 - 955