Midwest Optical Systems

Midwest Optical Systems A leading manufacturer of custom precision optical filters, components, and imaging solutions since Unmounted filters are offered in custom shapes and sizes.

A manufacturer of custom precision optical components and imaging solutions since 1988, Midwest Optical Systems - MidOpt - is recognized as the world’s leading resource for off-the-shelf and custom machine vision filters, lenses and accessories used in industrial imaging applications. MidOpt has an extensive history in optical component design, fabrication and inspection, and continues to develop

innovative new products for industrial imaging that are simply not found elsewhere. Industries served: machine vision, security, surveillance, LPR, scientific, bio-medical and NDVI. MidOpt’s complete line of filters cover the visible, near-infrared and UV spectrums. They represent the easiest, most cost effective method for insuring the reliability, stability and repeatability of industrial imaging systems. MidOpt filters are rugged; environmentally stable; heat and solvent resistant; non-hygroscopic and oleophobic, and are easy to maintain. Various designs are available for use in:

· Refining color recognition and improving separation of subject matter
· Ease viewing of desired features through contrast enhancement
· Elimination of glare or hot spots from highly reflective surfaces
· Saving cost, space and system maintenance and start-up time by eliminating the need for shrouding
· Protecting camera lenses and lighting from dust, scratching and inhospitable environments
· Enhancing lens resolving capability by greatly reducing chromatic aberrations.
· Boosting system speed and efficiency while substantially decreasing false accepts/false rejects.
· Reducing required luminous intensity, thereby saving on lighting cost and maximizing the lifespan of LED or other light sources. MidOpt offers the largest variety of threaded filter mount sizes and types in stock ranging from M13.25 to M105. MidOpt filters can be fastened to any camera lens with the appropriate mounting solution.

MidOpt® BN Series: Built for Tough Lighting ConditionsPopular in factory automation and fluorescence imaging, BN Series ...
09/01/2026

MidOpt® BN Series: Built for Tough Lighting Conditions

Popular in factory automation and fluorescence imaging, BN Series filters excel at blocking overwhelming ambient light – including sunlight – and preventing cross-talk.

🌙 NIR BN Filters are a go-to choice for outdoor applications like license plate recognition, ensuring clear, reliable imaging even in challenging environments.

Sharper vision starts with better filtering.

MidOpt® is heading to VISION Stuttgart, October 6–8! Visit us at Booth 10F52 to see SiLWIR® Silicon Protective Windows, ...
08/31/2026

MidOpt® is heading to VISION Stuttgart, October 6–8! Visit us at Booth 10F52 to see SiLWIR® Silicon Protective Windows, a durable alternative to germanium for 8–12 µm LWIR thermal imaging that offers more than 2X the mechanical strength of germanium.

We’ll also showcase our full line of machine vision optical filter solutions for applications across industrial imaging, automation and beyond.

📍 VISION Stuttgart | Booth 10F52
📅 October 6–8, 2026

Discover MidOpt® Bi Series Bandpass Filters- Narrow bandwidth: 45-55 nm FWHM*- Peak transmission ≥ 85%- StablEDGE® desig...
08/26/2026

Discover MidOpt® Bi Series Bandpass Filters
- Narrow bandwidth: 45-55 nm FWHM*
- Peak transmission ≥ 85%
- StablEDGE® design reduces angular dependency & short-shifting
- Ideal for laser diode & LED use in high ambient light environments
- Double-side polished for superior optical flatness & parallelism
- Exceptional out-of-band blocking
- Available up to 165mm sq.

*Applies in most cases

Engineered for precision in challenging conditions.

👉 Learn more: https://midopt.com/filters/bandpass/

Case Study: Block Unwanted Light | A MidOpt® BP470 Blue Bandpass Filter blocks light emitted by the UV LED, passing only...
08/24/2026

Case Study: Block Unwanted Light | A MidOpt® BP470 Blue Bandpass Filter blocks light emitted by the UV LED, passing only the blue emission of the 2D barcode. Watch the Video: https://youtu.be/9kUfvZPEfr0

BP Series filters are a top choice in machine vision and factory automation – especially critical for fluorescence imagi...
08/20/2026

BP Series filters are a top choice in machine vision and factory automation – especially critical for fluorescence imaging.

Wavelength Separation in Action:
Before: Yellow background and white text blend together with low contrast.
After: Adding a BP470 filter over the camera lens blocks yellow light, dramatically improving contrast and making date and lot codes easy to read.

Meet the MidOpt® BP Series Bandpass Filters- Broad bandwidth: 60+ nm FWHM*- Peak transmission ≥ 90%- StablEDGE® design m...
08/18/2026

Meet the MidOpt® BP Series Bandpass Filters

- Broad bandwidth: 60+ nm FWHM*
- Peak transmission ≥ 90%
- StablEDGE® design minimizes angular dependency & short-shifting
- Gaussian passband perfectly matches common LED outputs
- Double-side polished for optical flatness & parallelism
- Superior out-of-band blocking
- Available up to 165mm sq.

*Applies in most cases

Precision and performance you can trust for demanding machine vision applications.

👉 Learn more: https://midopt.com/filters/bandpass/

Find the Right Filter—FastNot sure which filter fits your application? The MidOpt® Curve Compare Tool makes it easy!- Co...
08/12/2026

Find the Right Filter—Fast

Not sure which filter fits your application? The MidOpt® Curve Compare Tool makes it easy!

- Compare wavelength & transmission curves
- View up to 5 filters side-by-side
- Make smarter, faster decisions for your vision system

👉 Learn more: https://midopt.com/tools/curve-compare/

Engineered for machine vision, the BP, BN and Bi Series deliver exceptional contrast, repeatability, and system stabilit...
08/10/2026

Engineered for machine vision, the BP, BN and Bi Series deliver exceptional contrast, repeatability, and system stability by transmitting only the wavelengths you need.

✅ UV, VIS, NIR and SWIR passbands
✅ StablEDGE® tech for reduced angular dependency
✅ Blocks ambient light – no shroud needed
✅ Boosts resolution, minimizes chromatic aberration
✅ AR coated, hard-coated, 40/20 surface quality

Reliable. Repeatable. Ready for any environment.

👉 Learn more: https://midopt.com/filters/bandpass/

08/06/2026

Mounting Made Easy with MidOpt®

MidOpt® offers a wide range of mounting solutions to fit your application needs – whether standard or custom.

✔️ Over 20,000 mounted filters in sizes from M13.25 to M105
✔️ Options for non-threaded applications
✔️ Custom mounting solutions available
✔️ Featuring the exclusive 25.4® C-Mount filter

No matter your setup, we’ve got the perfect fit for precision and performance.

👉 Learn more: https://midopt.com/mounts/

Address

322 N Woodwork Lane
Palatine, IL
60067

Opening Hours

Monday 7am - 5pm
Tuesday 7am - 5pm
Wednesday 7am - 5pm
Thursday 7am - 5pm
Friday 7am - 5pm

Telephone

+18473593550

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