UV Food Inspection: Detecting Aflatoxin on Figs

MidOpt® Longpass filters can block an excitation light source and pass multiple emission wavelengths. In this case, the LP415 is used to block the UV wavelengths of the light source, making the aflatoxin show as a teal green color.

VIEW LP415

Application

UV Food Inspection: Detecting Aflatoxin on Figs

MidOpt® Longpass filters block an excitation light source or to pass multiple emission wavelengths. In this case, the LP415 is used to block the UV wavelengths …

Learn more

25.4 C-Mount, A MidOpt Exclusive

  • Exclusively designed by MidOpt® to work with a C-Mount Camera between the lens and sensor
  • Recommended for wide angle lenses
  • Helps to prevent vignetting and angular shift
  • Useful in applications that have space constraints and/or lenses that do not have Filter threads
  • Custom installation wrench included

LEARN MORE

Solutions

25.4 C-Mount, A MidOpt Exclusive

Exclusively designed by MidOpt® to work with a C-Mount Camera between the lens and sensor. Recommended for wide angle lenses and helps to prevent vignetting …

Learn more

Custom Protective Window Design

MidOpt offers decades of experience custom designing optical filters and windows for a broad range of machine vision applications.

Capabilities include:

  • Glass, acrylic, polycarbonate, sapphire and other substrates
  • Oleophobic, anti-reflection, anti-smudge, anti-fog and hydrophobic coatings available
  • Chemically strengthened glass options, including Gorilla Glass®
  • Wavelength and polarization filtering
  • Custom silk screening service for borders, masking, fiducial marks, logos or patterns
  • Available with various mounting configurations based on need

VIEW PROTECTIVE SERIES

Solutions

Custom Protective Window Design

MidOpt offers decades of experience custom designing optical filters and windows for a broad range of machine vision applications. Capabilities …

Learn more

Block Unwanted Light Using a MidOpt® Red Bandpass Filter

Lightens reflections and block interfering ambient light, resulting in greatly improved contrast. The MidOpt BP635 filters achieve excellent results in blocking unwanted light for all “light red” lighting applications in this range.

VIEW BP635

Application

Block Unwanted Light Using a MidOpt® Red Bandpass Filter

Lightens reflections and block interfering ambient light, resulting in greatly improved contrast. The MidOpt BP635 filters achieve …

Learn more

Day/Night Imaging using Dual-Bandpass Filters

To achieve accurate color rendition in applications using a color camera during the day and infrared (IR) illumination at night, a Dual Bandpass Filter is an ideal solution. Dual Bandpass filters pass visible light and a narrow wavelength range in the near-IR spectrum that directly corresponds to the emission wavelength of the IR illumination that is used. This helps to ensure imaging results that are clear and accurate under most lighting conditions.

VIEW DB SERIES

Solutions

Day/Night Imaging using Dual-Bandpass Filters

To achieve accurate color rendition in applications using a color camera during the day and infrared (IR) illumination at night, a Dual Bandpass Filter can …

Learn more

UV Fluorescence Paint Marker Inspection

When a railroad tie with a metal endplate runs through vision inspection, a UV (325nm) light is used with a BP525 Light Green Bandpass Filter to ignore (block) the reflection from the end-plate and pass only the emission of the fluorescent paint marker in order to determine orientation of the tie.

VIEW BP525

Application

UV Fluorescence Paint Marker Inspection

When a railroad tie with an endplate runs through vision inspection, a UV (325nm) light is used with a BP525 (500nm – 555nm) Light Green Bandpass Filter …

Learn more

Protecting Sensors from Laser and NIR Damage

For applications in which full spectrum infrared (i.e., heat) and/or UV radiation are an issue. The SP701 and SP705 allow cameras to eliminate blooming to achieve natural color, and protect the camera sensor from IR damage. The SP701 blocks UV light and IR light up to 1550nm. Heat-resistant Borofloat® substrates available in 1mm and 2mm thicknesses.

Custom unmounted sizes can be provided up to 760 x 200mm in size.

VIEW SP SERIES

Solutions

Protecting Sensors from Laser and NIR Damage

For applications in which full spectrum infrared (i.e., heat) or UV radiation are an issue. Hot mirror blocking throughout the UV and NIR out to 1500nm …

Learn more

Out-of-Band Blocking

Superior out-of-band blocking is an important consideration when choosing an optical filter for Machine Vision applications. Even a small amount of out-of-band light that passes can reduce contrast and cause read errors.



Performance

Out-of-Band Blocking

Superior out-of-band blocking is an important consideration when choosing an optical filter for Machine Vision applications. Even when a small amount of out-of-band light is allowed to pass …

Learn more
Performance

The MidOpt Gaussian Passband

The spectral output from a single color LED light source used in any vision application typically follows a normal Gaussian or “bell shape” profile.

Learn more

Coatings: Oleophobic

The Oleophobic coating, by MidOpt, resists moisture, oils, grease and smudging from finger prints. This coating is a particularly useful in a wide range of outdoor and harsh environment applications, such as outdoor camera enclosures and drone applications.

VIEW SERIES

Solutions

Coatings: Oleophobic

This coating is a particularly useful in a wide range of outdoor and harsh environment applications, such as outdoor camera enclosures and drone applications, where the lens may need extra protection.

Learn more

Establish Repeatability in Your Machine Vision Applications

When choosing a machine vision filter it’s important to select one with exceptional optical and surface quality in order to establish repeatability with your applications. Surface quality is also important for optimal image results. MidOpt filters are near-flawless and exceed the industry surface inspection standard with a 40/20 scratch/dig ratio. 

Performance

Establish Repeatability in Your Machine Vision Applications

It’s important to select one with exceptional optical and surface quality in order to establish repeatability with your applications.

Learn more

Glare Reduction with Polarizing Filters and Film

Reduce glare and achieve the best image results by using a polarizing filter over the lens and polarizing film over the light source. MidOpt offers three types of polarizers: PR/PL Series Linear Polarizers, PC Series Circular Polarizers and Pi Series Infrared Polarizers.

Solutions

Glare Reduction with Polarizing Filters and Film

Reduce glare and achieve the best image results by using a polarizing filter over the lens and polarizing film over the light source. MidOpt offers three types of polarizers …

Learn more
UV Machine Vision Application
UV Machine Vision Application

Fluorescence Inspection of Code Marking

A UV light and monochrome camera is used to illuminate a black ink cartridge with a blue code marking. Using a MidOpt® BP470 Blue Bandpass Filter only the emission from the blue ink code is captured and all other light blocked, creating sufficient contrast.

VIEW BP470

Application

Fluorescence Inspection of Code Marking

A UV light is used with a monochrome camera and blue bandpass filter in order to improve contrast of a blue code printed on a black ink cartridge …

Learn more

3D Laser Triangulation Inspection

This application uses a 3D Laser Triangulation system to inspect the shape and condition of a wood shipping pallet. Without a filter, the imaging system captures excessive noise, particularly from parts below the pallet. When a typical bandpass filter is used there is information loss at the left and right edge of the image due to angular shift, making complete inspection impossible. However, using a MidOpt BP660 Dark Red Bandpass filter with StablEDGE®, angular shift is no longer a problem and a complete image is captured with improved contrast.

Application

3D Laser Triangulation Inspection

This application uses a 3D Laser Triangulation system to scan the shape and surface structure of a wood shipping pallet in order to inspect it for damage …

Learn more
Solutions

Custom Filter Mounts

MidOpt Custom Filter Slip Mounts can be designed for a wide range of lenses including varifocal lenses, wide angle lenses, oversized and telecentric, and lenses without filter threads …

Learn more
Performance

StablEDGE® Filter Design by MidOpt

MidOpt StablEDGE® optical filters are specially designed to be less susceptible to effects that arise from angular shifting. This is produced by most optical filters when …

Learn more

The MidOpt 40/20 Scratch-Dig Standard

Most MidOpt filters are designed with a 40/20 scratch-dig ratio. What exactly does this mean in terms of your image results? Surface quality is an important for optimal image results. MidOpt filters are near-flawless and exceed the industry surface inspection standard with a 40/20 scratch/dig ratio. (Most manufacturers follow 50/80 scratch/dig criteria.) And in applications where the filter is placed in front of the sensor—where imperfections are most pronounced—MidOpt offers a 10/5 standard. Every filter is examined using state-of-the-art spectrophotometer technology. Each filter must pass strict guidelines for proper transmission, full-width half-max and out-of-band blocking.

This standard ensures consistent, optimal quality and repeatability with your machine vision imaging.

Performance

The MidOpt 40/20 Scratch-Dig Standard

Most MidOpt filters are designed with a 40/20 scratch-dig ratio. What exactly does this mean in terms of your image results? Surface quality is important for optimal image results …

Learn more

Glare Reduction in Glass Bottle Inspection

In this example we see beer bottles imaged at the same time, which have dark, specular, cylindrical surfaces that are difficult to image because the labeling tends to produce glare regardless of how the bottles and lighting may be setup. Polarizing filters used over the lens as well as the light source significantly reduces the specular glare from the application. In addition, because of the curved shape of the bottle, ambient light is also contributing to the glare. Using a MidOpt BP635 Light Red Bandpass filter together with a 625nm red LED effectively eliminates the glare entirely.

Filters used:
PR032 Linear Polarzier
PS030 Ultra High Contrast Linear Polarizer Film
BP635 Light Red Bandpass Filter

Application

Glare Reduction in Glass Bottle Inspection

In this application we illustrate how a MidOpt Bandpass filter is used in conjunction with a MidOpt polarizer to completely eliminate glare …

Learn more

2D Barcode Detection on Plastic Bottles

This application uses a bandpass filter with UV (Ultra-violet) illumination. The MidOpt BP470 Blue Bandpass filter effectively blocks light emitted by the UV LED, passing only the blue emission of the 2D barcode.

VIEW BP470

Application

2D Barcode Detection on Plastic Bottles

This application uses a MidOpt BP470 Blue Bandpass filter with a UV Light source to detect a blue emission from a 2D matrix …

Learn more

Reducing Glare to Detect Clear Flux Characters

This application involves PCB with clear flux on copper leads. The first image is the original color image while the second image is the monochrome application example. The second image (before) is the monochrome application image without polarization filtering. Notice the copper leads on PCB reflect light, making clear liquid flux detection nearly impossible. The final image (after) shows the clear flux detection is made possible with polarizer film used over the DCM High Powered Ring Light and a polarizer filter over a GOYO 35mm Lens.

Filters used:
PR032 Linear Polarizer
PS007 High Contrast Linear Polarizer Film

Application

Reducing Glare to Detect Clear Flux Characters

Clear liquid flux, often used in computer chip manufacturing, can be difficult to inspect due to reflection. This application provides the solution …

Learn more