Where Image Quality Begins Filters are a Necessity Not an Accessory

Control Light. Block Unwanted Light. Pass Desired Wavelengths. Inexpensive Insurance Policy for the System

Achieve consistent results with Machine Vision Filters

The most cost effecve way to improve repeatability and stability in any machine vision system. Digital sensor (typical CCD/CMOS) spectral response Digital sensors are extremely sensive to interfering ambient light

Save Money & Space Opcal filters can Filters Control eliminate light shields Light Variability Bandpass filters block interfering ambient light to control variability Increase Contrast Selecvely pass or block light wavelengths to highlight or darken areas of an image

Block Light = Darken Color Pass Light with Green Bandpass Filter and Highlight Green Colored Marker Pass Light = Highlight Color

Block Wavelengths with Green Bandpass Filter to Darken Blocked Colors Increase Resoluon Before Bandpass Filter Aer Bandpass Filter White Light

NIR NIR

VIS VIS

UV UV Does the quality of the filter maer?

Filters designed for photographic Color Image, No Filter film are not suitable for digital imaging systems!

Relative Spectral Response CCD/CMOS Red Photographic Filter – Lightens (passes) red wavelength Photographic Film

Relave Spectral Response: Black and White Film vs Digital CCD/CMOS Sensor Green Photographic Filter – Darkens (blocks) red wavelength Photographic Filter Machine Vision Bandpass Filter

Photographic filters limit camera efficiency Machine vision bandpass filters transmit more light to the sensor allowing for shorter exposure mes and faster line speeds. Photographic Filter Machine Vision Bandpass Filter

Machine vision bandpass filters pass only the desired applicaon illuminaon and blocks surrounding ambient light from interfering Bandpass Filters Developed for Machine Vision

Highest Possible Peak Transmission

Improve LED & Overall System Performance

Less Suscepble to AOI shiing

Precision Opcal Quality

Filters Designed for Machine Vision Illuminaon

Solid Blue 470 LED Acutely Narrow Filters Bandpass Filters Spans 60-70 +/-10nm Span 20 nm Span 80-90 nm typical Narrower Bandwidth Design for for Improved Spectral Separaon

Broader Filter Bandwidth (BP Series) Narrower Filter Bandwidth (BN Series) Spans 80-90 nm Spans 40-50 nm

• Ideal for use with LED Illuminaon and • Suitable for laser diodes most fluorescence applicaons • Useful for: outdoor applicaons & fluorescence applicaons requiring reduced cross talk Test the Effects of Monochromac Illuminaon

White LED no filter, Blue Bandpass Filter Blue LED highlights no contrast highlights blue push pin push pin Test to Determine Your Opmal LED wavelength Ulize a broad spectrum light source with Bandpass Filters to test & determine the opmal LED wavelength for your applicaon Extreme durability

Applicaon Examples Increase Contrast with Bandpass Filters

White Text Yellow Background White LED, MidOpt BP470 Blue Bandpass Color Sorng MidOpt BP660 Red Bandpass Filter Results

MidOpt BP470 Blue Bandpass Filter Original color image No Filter Monochromac imaging with opcal filters significantly increases camera efficiency

Color Monochrome Monochrome with Filter MidOpt Blue Bandpass Filter

25% Efficient 90% Efficient Each pixel in a monochrome sensor is used to detect intensity.

Combined with a blue bandpass filter that transmits 90+%, a monochrome sensor vs a color sensor is at least 3 mes more efficient Original Color Image, Blue fluorescence; Blue Bandpass Filter UV 395nm LED No Filter UV Fluorescence Imaging Excitaon light source interferes with weaker emied fluorescence without the use of filters

No Filter, 395nm UV Light 395nm UV Light with MidOpt BP470 Blue Bandpass Filter Convert your Camera into an Infrared Imager View the invisible with IR Bandpass filters Before Filter Aer Filter Other Filters Used in Vision Applicaons Reduce Glare with Polarizing Filters & Film

No Filter Polarizing Filter Polarizing Filter & Film BP660 + Polarizing Filter & Film

Glare from LED & ambient light Significant glare remains Minimal glare from ambient light remains Further reduces glare & improves contrast

• Minimize specular glare by using a polarizer over the lens and a polarizer film over the light source

• For imaging above 700 nm Infrared polarizer must be used Lens polarizer with locking Custom sheet shapes & thumb screw to prevent sizes to fit the light change of orientaon source

Shortpass / Near-IR Cut Filters

Before Filter Aer Filter

• Lets shorter wavelengths pass while blocking the longer ones • Block IR light from interfering with color rendion in CCD/CMOS cameras • Commonly placed over the image sensor Neutral Density Filters

Before Filter Aer Filter

• Reduce light intensity without affecng color

• Achieve shallow depth of field

• Can be used with monochrome & color cameras in the visible spectrum Combine Shortpass and Neutral Density Filters to Reduce Image Blooming/Saturaon

High temperature, Light Intensity and Image Saturaon Reduce intensity, saturaon & interfering red channels with a neutral density filter in combinaon with a shortpass filter

Shortpass Filter Neutral Density Filter

+ Dual (Visible + Infrared) Bandpass Filters

• Use for color camera day/night applicaons along with IR illuminaon

• Blocks interfering IR wavelength range to achieve accurate color rendion

• Ability to view with IR illuminaon at night

Less interference from the sun at 940nm

Longpass Filters (High Pass, Sharp Cut)

• Useful in blocking excitaon light source while passing all emission where ambient light is not an issue

• Longpass filters can be used to pass mulple LEDs Ex. 590 & 850 nm

• A/R coang increases transmission

• For traffic & security applicaons, the acrylic Infrared Longpass is ideal Before Filter Aer Filter Protecve / UV Blocking Filters

• Protect lenses from dust and harsh industrial environments • An-reflecon coangs maximize transmission • Hard coated acrylic protecve windows are an economical soluon and useful for FDA requirements & outdoor applicaons

Materials: • High efficiency an-reflecon coangs standard on AC380, LP285, LP340 & LP415 • Acrylic or glass opons; an-reflecon coated or uncoated alternaves Mounts for Any System

Soluons for any lens – with or without filter threads; C/CS camera mounts & custom shaped filter glass

Threaded Slip-On C/CS Mount Unmounted Mount Mount Lens Accessories

CS Mount Lens Step Rings Lens Extension Tubes Right Angle Enclosure Aachment Custom opcal components for industrial vision & lighng

• Precision Opcal Windows • Prisms • Filters • Focusing Lenses • Dust Covers • Beamspliers • Light Pipes • Diffusers • Wedges • Polarizers • Mirrors Machine Vision Filter Test Kits

MidOpt Opcal Filters are the simplest, quickest and most cost effecve way to improve repeatability and stability in any Thank machine vision system. You www.midopt.com