Results with Machine Vision Filters
Comparison to Photographic Filters
Comparison to Narrow Band Filters
Recommended Filters for Machine Vision
Kits for testing Filters and Lighting
MidOpt Filters
Our complete line of mounted, single substrate, hard coated filters are specifically created for industrial machine vision applications.
- 66 filter types
-
16 sizes of each filter in stock
- 8 fast-build standard sizes
- unlimited optical options
Filters originally developed for photography are not readily adaptable for machine vision imaging, nor do they result in the best solutions for many machine vision problems.
MidOpt's machine vision filters increase the contrast of the subject under inspection, improving the ability of the system to distinguish desired characteristics. Increased contrast allows for increased accuracy and speed. Because lighting will change over time and ambient light is everywhere, our filters create the contrast you need and continue to work to control your lighting in the long run.
Lenses are a critical part of any vision system, so at the very least, protect them from dust and scratches with a MidOpt Filter.
Filter selection is made by matching a filter type to the lighting and sizing to the diameter of the camera lens.
Advantages of MV Filters v/s Photographic Filters
Match filters with lighting
When matched with the correct lighting, optical filtering is one of the most important factors to control the ability of any vision system to perform reliably over the intended lifespan. Therefore, selecting the right filter for the job is critical, not just at the time it is first put into service but for the long haul.
Our filters are designed to work with a wide variety of lighting: monochromatic or white LED, fiber optic, structured diode-generated patterns and other lighting commonly used in machine vision applications.
We stock a broad range of filter options designed to quickly and securely mount to the smaller diameter lenses used by CCD and CMOS cameras.
MidOpt filters are engineered and sized to each mount for maximum field of view, and are ready to use right out of the box.
Our coatings:
• are extremely durable
• are non-hydroscopic
• withstand repeated cleaning with solvents
• withstand high heat, humidity, and vibration
• have an almost unlimited lifespan
Ordering Filters:
Filters are ordered by creating a part number that specifies the type of filter desired, coupled with the size required.
Ex: BP660-25.5 is the number for the 660nm bandpass filter for use with lenses having 25.5mm diameter (M25.5xP0.5) filter threads.
If you know what you want, contact us at: orders@midopt.com
For quotes and general inquiries, send an email to: midwest@midopt.com
As always, we will answer your phone calls in person (no pressing 1 for anything) at 847-359-3550.
Standard Threaded Mounts
Each filter is stocked in 16 standard sizes (22.5mm to 62mm) for same- or next-day shipping. Larger filters (67mm to 105mm) are made to order and are normally not returnable.
Click here for drawing of standard mounts
Slip Mounts
When your lens does not have threads for mounting a filter, Slip Mount adapters are available. Slip Mounts attach a regular filter to the front of a lens, or they can attach a very large filter to accommodate a wide angle lens and prevent vignetting. Please call to order the Slip Mount adapters as they are individually laser cut to fit your lens' outside diameter.
C-Mounts
This threaded mount screws into any C- or CS-mount camera so the filter is positioned directly in front of the sensor. Wrenching slots aid in threading the filter into the camera body. A lens spanner wrench, pointed object or the upper anvils of a pair of vernier calipers can be used as wrenching tools. After installing the filter, the lens is then threaded into the camera and the filter sits immediately behind the lens.
Click for
drawing
of c-mounts
Filter Kits
The MidOpt Filter Kits are designed to assist in evaluating and improving image quality, testing for color of lighting prior to purchase, and testing for the best filter type. Electronic imaging specialists, machine vision integrators and end users of automated inspection systems
Each kit provides a selection of filters useful in observing the effects of different colors, wavelengths, light intensity and polarization on images obtained with various types of commonly used industrial cameras and lighting.
Read more....
AC380 – A/R and Scratch-Resistant Acrylic
BP250 – Broadband UV Bandpass
BP324 – UV 'A+B' Bandpass
BP365 – Blacklite/UV 'A' Bandpass
BP435 – Deep Blue/UV Bandpass
BP465 – Deep Blue Bandpass
BP470 – Blue Bandpass
BP500 – Green-Blue Bandpass
BP505 – Cyan Bandpass
BP525 – Light Green Bandpass
BP530 – Green Bandpass
BP535 – Green Dichroic Bandpass
BP550 – NIR-UV Block/Visible Pass
BP590 – Orange Bandpass
BP635 – Light Red Bandpass
BP660 – Dark Red Bandpass
BP695 – IR Bandpass
BP735 – IR Bandpass
BP800 – IR Bandpass
BP850 – IR Bandpass
BP880 – IR Bandpass
FL550 – Minus Green
LA080 – Minus Blue
LA120 – Minus Blue+
LB080 – Minus Red
LB120 – Minus Red+
LP340 – A/R Coated Window
LP390 – UV Absorbing
LP415 – UV Dichrioc Blocking
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 – IR Longpass
LP715 – IR Longpass
LP780 – IR Longpass
LP830 – IR Longpass
LP850 – IR Longpass
LP920 – IR Dichroic Longpass
LP1000 – IR Longpass
ND030 – OD = 0.3 (50%)
ND060 – OD = 0.6 (25%)
ND090 – OD = 0.9 (12%)
ND120 – OD = 1.2 (6%)
NF550 – Magenta Dichroic Shortpass
PC052 – Circular Polarizer
PI035 – IR Linear Polarizer
PR032 – Rotating Linear Polarizer
PSxxx – Visible and IR Polarizing Sheets
SP510 – Blue Dichroic Shortpass
SP570 – Blue-Green Dichroic Shortpass
SP585 – Cyan Dichroic Shortpass
SP625 – Blue-Orange Dichroic Shortpass
SP645 – Mid-Red/NIR Dichrioc Block
SP675 – Deep Red/NIR Dichrioc Block
SP700 – Hot Mirror/NIR Dichroic Block
SP705 – Deep Red/NIR Block
SP730 – Hot Mirror/NIR Colorless Block
SP785 – IR Dichroic Block (modified)
HOME | FILTERS | LENSES | ACCESSORIES | SITE MAP
FILTER TYPES:
Bandpass - Color
Bandpass - UV
Infrared Pass - Visible Block
Infrared Block - Visible Pass
Longpass - Color
Neutral Density
Polarizing
Protective Windows / UV Blocking
Shortpass / Notch Color
White Light Balancing
PAGE LINKS:
Standard Thread Mount Sizes
Slip Mounts and C-Mounts
Alphabetic Filter Listing
COLOR BANDPASS
These filters allow you to selectively control what your camera sees and are ideal for LED or laser diode use. Far more rugged, thinner, less angle-sensitive, with much higher transmission and far lower in cost compared to conventional interference filters, they greatly improve contrast and eliminate the need for a costly light shroud.
FILTER NO. - FILTER NAME - USE/APPLICATION
BP465 – Deep Blue Bandpass - generally not recommended for machine vision applications [NR]
BP470 – Blue Bandpass - blue LEDs/UV fluorescence
BP500 – Green-Blue Bandpass – [NR]
BP505 – Cyan Bandpass – for 505nm LED lighting
BP525 – Light Green Bandpass – green LEDs/fluorescence
BP530 – Green Bandpass – [NR]
BP535 – Green Dichroic Bandpass – [NR]
BP590 – Orange Bandpass – amber/orange LEDs/UV fluorescence
BP635 – Light Red Bandpass – high-power red LEDs
BP660 – Dark Red Bandpass – darker red LEDs and structured laser diodes
INFRARED PASS - VISIBLE BLOCK
Filters for passing select infrared wavelength ranges. Infrared pass filters are considered mandatory for all near-infrared applications in order to block the visible wavelengths that negate the effects of seeing in the IR.
LP695 – IR Longpass – IR LED's @ 720nm
LP715 – IR Longpass – [NR]
LP780 – IR Longpass – IR diode lasers @ 810nm
LP830 – IR Longpass – general IR +880nm IR LEDs
LP850 – IR Longpass – [NR]
LP920 – IR Dichroic Longpass – IR LEDs @ 940nm
LP1000 – IR Longpass – IR Vidicon/InGaAs cameras
BP695 – IR Bandpass – NIR fluorescence
BP735 – IR Bandpass – IR LEDs @ 735nm
BP800 – IR Bandpass – best choice if thin filter needed over sensor
BP850 – IR Bandpass – high-power IR LEDs @ 850nm
BP880 – IR Bandpass – IR LEDs @ 880nm
INFRARED BLOCK - VISIBLE PASS
Filters for blocking select infrared wavelength ranges. IR blocking filters are almost essential for color imaging.
BP550 – NIR-UV Block/Visible Pass – 400-700nm ... all color applications where filtering is not provided with the camera's sensor
SP645 – Mid-Red/NIR Dichrioc Block – best IR/mid-red block
SP675 – Deep Red/NIR Dichrioc Block – best IR/deep red block
SP700 – Hot Mirror/NIR Dichroic Block – standard IR block, for use with monochrome cameras
SP705 – Deep Red/NIR Block – [NR]
SP730 – Hot Mirror/NIR Colorless Block – standard IR blocking, for use with color cameras
SP785 – IR Dichroic Block (modified) – [NR]
POLARIZING
Neutral gray laminated glass filters transmit visible light in only one polarization plane and are used to suppress glare from specular surfaces. Available from stock are linear, circular and infrared polarizers in most sizes. Larger sizes, along with custom laser-cut and laminated glass and plastic sheet materials, are also available for polarizing all commonly used light sources.
PR032 – Rotating Linear Polarizer with locking screw – reduces glare in the visible spectrum; locks in position
PC052 – Circular Polarizer – reduces glare; for autofocus or autoiris lenses; for visible spectrum applications
PI035 – IR Linear Polarizer – reduces only infrared glare
PSxxx – Visible and IR Polarizing Sheets mount in front of lighting. Sheets are available in a range of sizes and thicknesses. Call us with your specific needs.
NEUTRAL DENSITY (% visible transmission)
Gray tinted glass ND filters are used to reduce luminous intensity without affecting color. Different optical densities (ODs) equate to an overall decrease in luminous transmission of visible light. Off-the-shelf styles include 1/2 (OD=0.30), 1/4 (OD=0.60), 1/8 (OD=0.90) and 1/16 (OD=1.20) filters. Other optical densities are available.
ND030 – Optical Density = 0.3 (50%) – reduces light intensity
ND060 – OD = 0.6 (25%) – reduces light intensity
ND090 – OD = 0.9 (12%) – reduces light intensity
ND120 – OD = 1.2 (6%) – for viewing into lamps
NDxxx – Call to discuss custom optical densities
PROTECTIVE WINDOW/UV BLOCKING
Clear, precision ground, polished and/or anti-reflection coated windows protect lenses from dust and harsh industrial environments. They transmit all visible light while blocking UV radiation. Anti-reflection/scratch resistant coated acrylic and chemically strengthened glass versions are also kept in inventory.
AC380 – A/R and Scratch-Resistant Coated Acrylic – FDA applications
LP340 – A/R Coated – anti-reflection coated window for visible app's
LP390 – UV Absorbing – protective window
LP415 – UV Dichrioc Blocking – blocks all UV; for high temps
BP550 – UV and NIR Blocking – blocks IR and UV; passes visible
UV BANDPASS
Filters are stocked for both passing and blocking select ultraviolet wavelength ranges. It is important to use UV pass/visible block filters in applications that actually involve imaging at UV wavelengths.
BP250 – Broadband UV Bandpass – deep broadband UV imaging
BP324 – UV 'A+B' Bandpass – mid- to near-UV imaging
BP365 – Blacklite/UV 'A' Bandpass – UV imaging/UV lighting filter
BP435 – Deep Blue/UV Bandpass –[NR]
LONGPASS COLOR
Longpass filters let longer visible and infrared wavelengths pass while blocking the shorter ones. Useful for improving contrast, resolution and separating colors in black/white or color applications. Typically not recommended for machine vision unless blocking of multiple wavelengths is necessary.
LP470 – Light Yellow Longpass – [NR]
LP500 – Yellow Longpass – blocks most blue and UV wavelengths
LP515 – Yellow-Orange Longpass – blocks all blue and UV
LP530 – Orange Longpass – [NR]
LP550 – Orange Longpass – [NR]
LP580 – Red-Orange Longpass – [NR]
LP590 – Red Longpass – [NR]
LP610 – Red Longpass – [NR]
LP630 – Red Longpass – [NR]
LP645 – Dark Red Longpass – [NR]
SHORTPASS/NOTCH COLOR
Shortpass filters let shorter (bluer) visible and infrared wavelengths pass while blocking the longer ones. Useful for improving contrast, resolution and separating colors in black/white or color applications. Typically not recommended for machine vision unless blocking of multiple wavelengths is necessary.
SP510 – Blue Dichroic Shortpass – for sorting gold from silver or plated metal parts
SP570 – Blue-Green Dichroic Shortpass – blocks orange to NIR
SP585 – Cyan Dichroic Shortpass – blocks red and very near IR
SP625 – Blue-Orange Dichroic Shortpass – blocks deep red/NIR
NF550 – Magenta Dichroic Shortpass – blocks green while passing blue and red wavelengths
WHITE LIGHT BALANCING
Corrects artificial white lighting so colors appear more natural. LA series (amber) reduce blue shading often strongly dominant in white LED, Xenon strobe and metal halide lighting. LB series (blue) reduce the red in tungsten and halogen lighting. FL series fluorescent lighting filters and other wavelength enhancing filters are available.
LA080 – Minus Blue – [NR]
LA120 – Minus Blue + – removes blue cast from white LED and metal halide lighting
LB080 – Minus Red – removes yellow cast from halogen lighting
LB120 – Minus Red + – [NR]
FL550 – Minus Green – removes green cast from fluourescent