Midopt Training

Application

Improving Contrast in Print OCR with IR Imaging

In the original image, a white backlight is used without a filter. When a MidOpt® BP850 Near-IR Bandpass Filter is placed over the lens and used with an IR backlight, the filter blocks the visible portion of the spectrum but passes only the ink illuminated by the output wavelength of the IR backlight. This makes the invisible print visible and also creates optimal contrast.

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Application

Improving Contrast in Print OCR with IR Imaging

In the original image, a white backlight is used without a filter. When a MidOpt® BP850 Near-IR Bandpass Filter is placed over the lens and used with …

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Inspecting a Security Data Code on Flexible Tubing that is not Viewable in Visible Light

This application illustrates how a MidOpt® BP470 Bandpass Filter can be used with a UV light in a monochrome camera inspection application to view a printed security code. The Bandpass Filter passes the emission of the printed code allowing it to standout from the background. The use of UV fluoresce ink makes the code invisible to the eye and acts as a security and counterfeit feature.

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Application

Inspecting a Security Data Code on Flexible Tubing that is not Viewable in Visible Light

This application illustrates how MidOpt® Bandpass Filters can be used with a UV light …

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Reducing Background Noise in a Plasma Bag Inspection Application

In this plasma bag application, background noise in the form of liquid bubbles was interfering with the inspection of OCR (Optical Character Recognition) printed on the plastic bag’s surface.
A MidOpt Blue Bandpass Filter (BP470) was used in conjunction with a UV light source to reduce the appearance of the bubbles in the final image.

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Application

Reducing Background Noise in a Plasma Bag Inspection Application

In this plasma bag application, background noise in the form of liquid bubbles

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Creating Contrast for Plastic Surface Inspection with a UV Light and Bandpass Filter

Using a UV light source without a filter over the lens creates insufficient contrast for inspection. When a UV light source is used together with a MIDOPT® BP324 UV Bandpass Filter on the lens, the contrast dramatically improved allowing for clear inspection of the surface defects on the plastic.

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Application

Creating Contrast for Plastic Surface Inspection with a UV Light and Bandpass Filter

Illumination by a UV light source without a filter over the camera lens does not provide enough contrast to differentiate …

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Creating Contrast for Optical Character Recognition on Reflective Metal Parts

In this application, UV light is overpowering the blue fluorescence emitted by this part making inspection difficult. A BP470 Blue Bandpass Filter over the lens blocks the UV light, and passes only the blue emission of the characters, producing excellent contrast in the final result.

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Application

Creating Contrast for Optical Character Recognition on Reflective Metal Parts

In this application, UV light is overpowering the blue fluorescence emitted by this part making inspection difficult.

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Increasing Image Resolution Using Bandpass Filters

Many machine vision lenses are not able to converge all wavelengths into perfect focus at the same focal point. Some wavelengths focus differently on the sensor plane. Bandpass Filters can improve resolution by reducing the wavelength range of light allowed to pass through the camera, eliminating chromatic aberrations.

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Application

Increasing Image Resolution Using Bandpass Filters

Not all lenses are able to converge all wavelengths into perfect focus at the same point on the focal …

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UV Absence and Presence Using a Bandpass Filter

MidOpt® Bandpass filters can be used in conjunction with a 365nm UV light source to capture fluorescence emissions at a given wavelength range. In this case, a seal on a credit card emits light back to the sensor at roughly 450-470nm (Blue). A MidOpt® BP470 Blue Bandpass Filter is then used to isolate only the blue fluorescence while darkening everything else in the image, creating excellent contrast.

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Application

UV Absence and Presence Using a Bandpass Filter

A 365nm UV Light is used to fluoresce a credit card seal. The seal emits light back in the blue range at roughly 450-470nm. A MidOpt® BP470 Blue Bandpass Filter …

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Using Longpass Filters to Enhance SWIR Imaging

Longpass filters, such as the MidOpt LP920, block visible and unwanted near-IR wavelengths and can provide excellent results in enhancing InGaAs camera imaging. These filters can also be placed in front of multi-spectral lighting used in semi-covert or photographic darkroom applications.

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Application

Using Longpass Filters to Enhance SWIR Imaging

ngpass filters, such as the MidOpt LP920, block visible and unwanted near-IR wavelengths and can provide excellent results in enhancing InGaAs camera imaging.

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Create Contrast Between Two Different Materialsof the Same Color

In this application we demonstrate the benefits of using a MidOpt® optical filter to help create excellent contrast in a machine vision inspection application in the infrared (IR), at the 830-850nm range.

Application

Create Contrast Between Two Different Materialsof the Same Color

Achieve contrast in machine vision inspection applications operating in the near-infrared (Near IR), at the 830-850nm range.

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Custom Acrylic Protective Window for Thermostat Application

Anti-reflection-coated custom acrylic windows are most commonly used as protective covers for cameras used in surveillance, and other similar applications. Options for MidOpt® custom acrylic window designs are available for nearly any industrial imaging application need.

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Application

Custom Acrylic Protective Window for Thermostat Application

Anti-reflection-coated custom acrylic windows are most commonly used as protective …

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