Midwest Optical Systems is a leader in machine vision filters and optical solutions. MidOpt filters are the premier solution for industrial imaging to ensure the very best image quality. Every filter is produced with the highest standards in durability, so they can withstand even the harshest environments. Some of the many industries MidOpt serves include: Machine Vision/Factory Automation, Security and Surveillance, License Plate Recognition/ITS, Medical and Life Science, Agricultural Inspection, Aerial Imaging, Motion Analysis, Photography and Cinematography.

**All Filter pricing varies by size, configuration, and quantity. These are customizable to shape, and can come mounted or unmounted. Please email us for a quote and/or recommendations for a filter to fit your needs.

Filters

Prices vary by size and quantity ordered. Email us for pricing or assistance finding the correct filter for your application.

BP324 Near UV Bandpass Filter

The Midwest Optical BP324 Near UV Bandpass filters have a broad spectral bandwidth in the UV while effectively blocking most visible and infrared light. Note that there is a slight deep red/near IR leak that peaks at about 720nm. Because this filter absorbs all unwanted visible and/or infrared light, it is not recommended for placement in front of intense (white) light sources

BP340 Near UV Bandpass Filter

The Midwest Optical BP340 Near UV Bandpass filter is a highly transmissive/high contrast alternative to more expensive thin film interference filters. The BP340 combines rugged dielectric coatings and absorptive filter glass for highly stable passband and excellent out-of-band blocking. BP340 is ideal for uses from UV Fluorescence to machine vision applications.

BP470 Blue Bandpass Filter

Prices vary by size, start at $70

The Midwest Optical BP470 filters enhance viewing of subjects illuminated by blue LED lighting and any UV- excited blue fluorescence emissions (430-500nm).  Its broad bandwidth and high peak (T ≥90%) transmission results in significantly brighter, higher contrast images. For most machine vision UV fluorescence applications, use of a BP470 filter is absolutely necessary.

BP505 Cyan Bandpass Filter

Prices vary by size, start at $70

The Midwest Optical BP505 filters are single substrate, hard-coated filters designed to match the output of most cyan LEDs. Coupled with the spectral sensitivity of most CCD/CMOS sensors in use today that also peak in this range, using this filter can result in images that are especially bright and very high in contrast.

BP525 Light Green Bandpass Filter

The Midwest Optical BP525 filter material is designed for use with green LED lighting, 532nm laser illumination and green UV fluorescence applications. A BP525 filter has a broader range, higher peak transmission and superior blocking of UV and NIR wavelengths compared to commonly found all-dichroic green bandpass filters.

BP550 NIR/UV Block-Visible Bandpass Filter

The Midwest OpticalBP550 filters effectively pass all visible light and block all light outside the visible range without “discoloring” the image. This single substrate, hard-coated filter is designed for use in full color, white light applications where either IR or UV light (or both) may be present.

BP590 Orange Bandpass Filter

The Midwest Optical BP590 filters are recommended for use in systems that make use of amber or orange LED lighting. These filters are also widely used in fluorescence imaging applications, particularly with dyes such as ethidium bromide, or when working with Qdot 565, 585 or 605.

BP635 Light Red Bandpass Filter

The Midwest Optical BP635 filter is recommended for use with 615-645nm LED and laser diode lighting. Because of its broad bandwidth and high peak transmission, BP635 filters work very well for all “light red” lighting applications in this range.

BP660 Dark Red Bandpass Filter

The Midwest Optical BP660 filter is recommended for use with 650-680nm LED and laser diode lighting. Because of the ample passband and excellent in-band transmission, it works well with all camera-related applications in this range.

BP850 NIR Bandpass Filter

The Midwest Optical BP850 is recommended when using high-power 830-850nm LED or laser diode lighting to improve contrast in surveillance applications or when inspecting in the infrared. The BP850 filter features high peak transmission and particularly durable, robust coatings. This filter’s coated surface also greatly inhibits staining due to year-round issues with heat, humidity, and/or air quality that affect uncoated infrared filters.

PR032 Linear Polarizer Filter

The Midwest Optical PR032 rotating linear polarizers offer maximum flexibility and ease of use. Rotating the mount and visually observing the results makes it easy to determine the position at which reduction of glare is maximized. Fixed, non-rotating mounts are also available.

PS007 Polarizer Film

The Midwest Optical PS007 High Contrast Linear Polarizer Film is .007" thick and achieves optimal glare reduction when placed over light source. Contrast ratios average up to 10,000:1. The PS007 can be custom laser cut to fit any light source with a maximum usable width of 16.5″ and length up to 300′.

Filter Kits

FK200 Machine Vision Filter Kit

The Midwest Optical FK200 comes with the ten most often recommended UV, VIS and NIR Machine Vision Filters. This compact test kit is an excellent resource for testing and evaluating image quality.

Included:
Ten most recommended UV, VIS and NIR Machine Vision Filters
27mm threaded mounts
Step-up and step-down rings to fit M25.5 and M30.5 lenses
Polarizing film for light source
Technical booklet with specs and application examples
Educational material to help in understanding filter use
Microfiber cleaning cloth
Compact, impact/static resistant case
Easy-to-track labeled filter slots
SU25.5-27 Step-Up Adapter
SD30.5-27 Step-Down Adapter

FS100 Machine Vision Swatch Filter Kit

The Midwest Optical portable FS100 makes it easy to solve applications on site, and includes the ten most often recommended UV, VIS and NIR Machine Vision Filters.
Included: Larger size 43mm diameter filters QR code linking to filter specifications Filter transmission curve

FK220 BN Series Filter Kit

The Midwest Optical FK220 BN Series filter kit features the innovative designs of the BP series kit with the addition of the BN740, BN810 and BN940—all in reduced bandwidth versions. Further wavelength separation is beneficial for use with LEDs and laser diodes; overwhelming ambient light conditions, such as outdoor applications; and fluorescence inspection. The BN Series is compatible with M25.5, M27 and M30.5 lens filter threads.

SK100 Filter Test Kit

The Midwest Optical SK100 includes 70 filters for UV, VIS and NIR imaging; making it the ultimate resource for testing and evaluating image quality. Filter categories included in the SK100: Bandpass; Dual Bandpass; Longpass; Neutral Density; Shortpass; Polarizing; Light Balancing; Protective and Acrylic.
Included:27mm threaded mount filters Step adapters to fit most M25.5 and M30.5 lenses Polarizing Film for light source Educational material on optical filters and technical specs for each filter Sturdy case for protective storage

FK100 Machine Vision Binder Filter Kit

Pricing varies by size, starts at $800

The Midwest Optical FK100 is an excellent starter kit for evaluating your system and image quality, and is available in any size filter M22.5- M105

Included:
Ten most recommended UV, VIS and NIR Machine Vision Filters
Step-up and step-down rings to fit M25.5 and M30.5 lenses*
Polarizing film for light source
Technical data and transmission curves for each filter
Educational material in durable binder to help in understanding filter use

NS100 Neutral Density Swatch Filter Kit

Pricing varies by size, starts at $500

The Midwest Optical portable NS100 makes it easy to solve applications on-site, and includes all MidOpt Visible Neutral Density Filters. See the effects of stacked ND filters to test various optical densities, Reduce light intensity in the visible spectrum without affecting color and contrast, and Test in both monochrome or color applications

IK100 NIR Machine Vision Filter Kit

Pricing varies by size, starts at $500

The Midwest Optical IK100 is an excellent starter kit when imaging in the NIR, is available in all threaded sizes: M25.5 – M105 and is designed to assist vision integrators and end users.

Included:
Six most often recommended NIR filters for Machine Vision
Step-up and step-down rings to fit M25.5 and M30.5 lenses*

NK100 Neutral Density Binder Filter Kit

Pricing varies by size, starts at $500

The Midwest Optical NK100 includes all Visible, Absorptive Neutral Density Filters and is available in all threaded mount sizes M22.5 – M105. This MidOpt Filter Kit allows you to: See the effects of stacked ND filters to test various optical densities, Reduce light intensity in the visible spectrum without affecting color and contrast, and Test in both monochrome or color applications

Model Number Index

Bandpass: BP Series: Broad Bandwidth

Prices vary by size, start at $65

 BP250 Deep-to-Near UV Bandpass

BP324 Near-UV Bandpass

BP365 Near-UV Bandpass

BP470 Blue Bandpass Absorptive VIS Bandpass/NIR Block

BP485 BP500 Green-Blue Bandpass

BP505 Cyan Bandpass

BP525 Light Green Bandpass

PE530 Photopic Response Filter

BP550 NIR/UV Block-Visible Bandpass

BP590 Orange Bandpass

BP635 Light Red Bandpass

BP660 Dark Red Bandpass

BP695 Near-IR Bandpass

BP735 Near-IR Bandpass

BP800 Near-IR Bandpass

BP850 Near-IR Bandpass

BP880 Near-IR Bandpass

Bandpass: BN Series: Narrow Bandwidth

Prices vary by size, start at $65

BN470 Narrow Blue Bandpass

BN520 (NEW) Narrow Green Bandpass

BN532 Narrow Green Bandpass

BN535 (NEW) Narrow Green Bandpass

BN595 Narrow Orange Bandpass

BN630 Narrow Light Red Bandpass

BN650 Narrow Dark Red Bandpass

BN660 Narrow Dark Red Bandpass

BN740 Narrow Near-IR Bandpass

BN785 Narrow Near-IR Bandpass

BN810 Narrow Near-IR Bandpass

BN850 Narrow Near-IR Bandpass

BN880 Narrow Near-IR Bandpass

BN940 SWIR Bandpass

LONGPASS | LP Series: Longpass

Prices vary by size, start at $52

 LP170 (NEW) Fused Silica Protective Window

LP171 (NEW) Fused Silica Protective Window

LP190 (NEW) Sapphire Protective Window

LP285 Borofloat Heat Resistant VIS-NIR A/R Protective Window Borofloat Heat Resistant VIS-NIR

LP286 (NEW) Oleophobic A/R Protective Window

LP330 Glass Protective Window

LP340 A/R Glass Protective Window Oleophobic A/R Coating

LP341 (NEW) Protective Window Oleophobic A/R Coating

LP345 (NEW) Protective Window

LP390 UV Absorbing Protective Window

LP415 UV Block

LP470 Light Yellow Longpass

LP500 Yellow Longpass

LP515 Yellow-Orange Longpass

LP530 Orange Longpass

LP550 Orange Longpass

LP580 Red-Orange Longpass

LP590 Red Longpass

LP610 Red Longpass

LP630 Red Longpass

LP645 Dark Red Longpass

LP665 Dark Red Longpass

LP695 Near-IR Longpass

LP715 Near-IR Longpass

LP780 Near-IR Longpass

LP800 Near-IR Longpass

LP815 Near-IR Longpass

LP830 Near-IR Longpass

LP850 Near-IR Longpass

LP900 SWIR Longpass

LP920 SWIR Longpass

LP1000 SWIR Longpass

LP1070 (NEW) SWIR Longpass

LP1475 (NEW) SWIR Longpass

LP1475A (NEW) SWIR Longpass / Extended VIS Block

LP1850 (NEW) SWIR Longpass

Shortpass SP Series Filter

Prices vary by size, start at $60

 SP510 Blue Shortpass Filter

SP570 Blue-Green Shortpass Filter

SP585 Cyan Shortpass Filter

NF550 Magenta Dichroic (Green Block) Filter

SP625 Blue-Orange Shortpass Filter

SP635 Absorptive VIS Shortpass/NIR Block Filter

SP644 Near-IR/MId-Red Dichroic Block Filter

SP645 Near-IR/Mid-Red Dichroic Block Filter

SP650 Near-IR/Mid-Red Dichroic Block Filter

SP675 Near-IR/Deep Red Dichroic Block Filter

SP700 Near-IR/UV Block-Visible Shortpass Filter

SP701 Extended Hot Mirror Filter

SP705 Near-IR/Deep Red Absorp. Block Filter

SP730 Near-IR/Colorless Dichroic Block Filter

SP785 Modifed Near-IR Dichroic Block Filter

Neutral Density Filter

Prices vary by size, start at $36

ND030 Absorptive 50% Transmission Filter

ND060 Absorptive 25% Transmission Filter

ND090 Absorptive 12.5% Transmission Filter

ND120 Absorptive 6.25% Transmission Filter

ND200 Absorptive 1.0% Transmission Filter

ND300 Absorptive 0.1% Transmission Filter

ND400 Absorptive 0.01% Transmission Filter

Ni030 Low Reflectivity 50% Transmission Filter

Ni060 Low Reflectivity 25% Transmission Filter

Ni090 Low Reflectivity 12.5% Transmission Filter

Ni120 Low Reflectivity 6.25% Transmission Filter