A vision system does not need more light. It needs the right light to reach the sensor and everything else to stop at the lens. That is what an optical filter does, and it is usually the cheapest component in the cell.
We supply a complete range of machine vision optical filters to be installed together with our LED illuminators: 223 references across ten families, from broadband and narrowband bandpass to interference, longpass, shortpass and NIR-cut, neutral density, polarizers, protective windows, acrylic filters, light balancing and diffusers.
The reason to fit one is almost always the same. An industrial cell is never dark: there is a skylight, a ceiling lamp, a neighbouring machine, an operator with a torch. If the camera can see that light, the image changes during the day and the inspection threshold that worked in the morning fails in the afternoon. A filter matched to the illuminator makes the camera blind to everything except the light you control, and the inspection becomes repeatable — which is the property a production line is actually buying.
Filters also do things that no amount of extra light can do: they suppress specular glare on glossy surfaces, they remove the chromatic aberration a lens introduces across a wide spectrum, they isolate a fluorescence emission from its excitation, and they protect an expensive front element from the factory floor.
The range in short
223 references, ten families
Bandpass, multi bandpass, longpass, shortpass/NIR-cut, neutral density, polarizing, protective, acrylic, light balancing, diffuser.
240 nm to 1000 nm and beyond
From deep UV to short-wave infrared, in broadband, narrowband and interference versions.
Mounted or unmounted
Threaded mounts from M13.25 to M105, C-mount 25.4, slip mounts for lenses without threads, unmounted glass cut to shape.
Matched to our illuminators
Every LED wavelength we produce has a corresponding filter; the pairing table is below.
Selection is part of the supply
Tell us the material, the defect and the ambient light: we specify the filter with the illuminator.
What a filter changes in the image
- Ambient light immunity — the camera sees only the band of your illuminator, so the image no longer changes when a door opens or a lamp is switched on
- Contrast on the feature that matters — a wavelength that the target absorbs and the background reflects turns an invisible difference into a grey-level difference
- Sharper edges — restricting the spectrum removes the chromatic aberration a lens introduces when it focuses several wavelengths at once
- Glare suppression — crossed polarizers remove the specular component and leave the diffuse light that carries the information
- Colour fidelity — cutting the near infrared that silicon sensors see but the eye does not keeps whites neutral and colour thresholds stable
- Fluorescence separation — the excitation is blocked and only the emission reaches the sensor, which is what makes the marker visible at all
- Protection — a sacrificial window takes the scratches and the spatter instead of the front element of the lens
Matching a filter to your illuminator
This is the short path. Take the wavelength of the illuminator you are using and read across: the filters listed transmit that band and reject the rest. Where more than one code appears, the first is the broadband choice — highest throughput, tolerant of LED peak drift — and the following ones progressively narrower, for cases where ambient rejection matters more than signal.
| Illuminator | Availability | Recommended filters | Transmitted band |
|---|---|---|---|
| Blue — 465 nm | DL/DC/BL series, BLU version | ● BP470 · ● BN470 · ● BP450 | 425-495nm / 460-490nm / 425-470nm |
| Green — 525 nm | on request | ● BP525 · ● BN532 · ● Bi525 | 500-555nm / 525-550nm / 518-538nm |
| Red — 630 nm | DL/DC/BL series, RED version | ● BP635 · ● BN630 · ● Bi632 · ● BN660 | 615-645nm / 625-645nm / 625-640nm / 645-675nm |
| Neutral white — 5500 K | DL/DC/BL series, WHI version | ● BP550 · ● BP485 · ● SP645 · ● SP700 | 405-690nm / 380-585nm / 400-640nm |
| UV excitation — 365-405 nm | fluorescence applications | ● BP470 · ● LP418 · ● BP500 · ● LP470 | 425-495nm / 425-1100nm / 440-555nm / 480-1100nm |
| Near infrared — 850 nm | on request | ● BN850 · ● Bi850 · ● LP780 · ● LP830 | 840-865nm / 845-860nm / 800-1100nm / 845-1100nm |
| Near infrared — 940 nm | on request | ● BN940 · ● Bi940 · ● LP920 | 928-955nm / 930-952nm / 930-2300nm |
Two rules of thumb worth stating. First, the filter band must contain the LED peak with margin: LEDs drift with temperature and with production batch, and a filter that is too narrow will start cutting your own light. Second, a filter only helps if the illuminator is stronger than the ambient light inside that band — filtering does not create signal, it removes competition.
Bandpass Filters
A bandpass filter transmits one region of the spectrum and blocks everything else. Paired with a monochromatic illuminator it does two jobs at once: it lets through the light you control and rejects the ambient light you do not, and it removes the chromatic aberration that a lens introduces when it has to focus several wavelengths at the same time. The result is a sharper, higher-contrast image that stays the same when someone opens a door or switches on a ceiling lamp. Broad bandwidth (BP) versions maximise throughput and tolerate LED peak drift; narrow bandwidth (BN) versions isolate a single source more aggressively; interference (Bi) versions give the steepest edges for fluorescence and laser work.
BP Series — Broad Bandwidth
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● BP250 | Deep-to-Near-UV Bandpass Filter | 240-260nm | |
| ● BP324 | Near-UV Bandpass Filter | 290-365nm | StablEDGE® |
| ● BP340 | Near-UV Bandpass Filter | 315-365nm | StablEDGE® |
| ● BP365 | Near-UV Bandpass Filter | 335-385nm | StablEDGE® |
| ● BP450 | Indigo Bandpass Filter | 425-470nm | StablEDGE® |
| ● BP470 | Blue Bandpass Filter | 425-495nm | StablEDGE® |
| ● BP485 | Absorptive Visible Bandpass/Near-IR Block Filter | 380-585nm | StablEDGE® |
| ● BP500 | Green-Blue Bandpass Filter | 440-555nm | StablEDGE® |
| ● BP505 | Cyan Bandpass Filter | 485-550nm | StablEDGE® |
| ● BP525 | Light Green Bandpass Filter | 500-555nm | StablEDGE® |
| ● PE530 | Photopic Response Bandpass Filter | 495-565nm | StablEDGE® |
| ● BP540 | Light Green Bandpass Filter (Discontinued – see BN532) | 515-560nm | StablEDGE® |
| ● BP550 | Near-IR/UV-Block Visible Bandpass Filter | 405-690nm | |
| ● BP590 | Orange Bandpass Filter | 560-600nm | StablEDGE® |
| ● BP610 | Green-Red Bandpass Filter | 520-690nm | StablEDGE® |
| ● BP635 | Light Red Bandpass Filter | 615-645nm | StablEDGE® |
| ● BP660 | Dark Red Bandpass Filter | 640-680nm | StablEDGE® |
| ● BP695 | Near-IR Bandpass Filter | 680-720nm | StablEDGE® |
| ● BP735 | Near-IR Bandpass Filter | 715-780nm | StablEDGE® |
| ● BP800 | Near-IR Bandpass Filter | 745-950nm | StablEDGE® |
| ● BP810 | (Limited) Near-IR Bandpass Filter | 790-830nm | |
| ● BP845 | (Discontinued) Near-IR Bandpass Filter | 830-865nm | StablEDGE® |
| ● BP850 | Near-IR Bandpass Filter | 820-910nm | StablEDGE® |
| ● BP880 | Near-IR Bandpass Filter | 845-930nm | StablEDGE® |
| ● BP1000 | Short-Wave Infrared Bandpass Filter | 930-1030nm | |
| ● BP1550 | Short-Wave Infrared Bandpass Filter | 1485-1645nm |
BN Series — Narrow Bandwidth
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● BN450 | Narrow Indigo Bandpass Filter | 435-465nm | StablEDGE® |
| ● BN470 | Narrow Blue Bandpass Filter | 460-490nm | StablEDGE® |
| ● BN485 | (Limited) Narrow Blue Bandpass Filter | 480-490nm | StablEDGE® |
| ● BN490 | (Limited) Narrow Green-Blue Bandpass Filter | 475-500nm | StablEDGE® |
| ● BN520 | Narrow Green Bandpass Filter | 510-545nm | StablEDGE® |
| ● BN532 | Narrow Green Bandpass Filter | 525-550nm | StablEDGE® |
| ● BN535 | Narrow Green Bandpass Filter | 520-545nm | StablEDGE® |
| ● BN595 | Narrow Orange Bandpass Filter | 580-610nm | StablEDGE® |
| ● BN630 | Narrow Light Red Bandpass Filter | 625-645nm | StablEDGE® |
| ● BN650 | (Discontinued) Narrow Red Bandpass Filter | 638-672nm | StablEDGE® |
| ● BN660 | Narrow Dark Red Bandpass Filter | 645-675nm | StablEDGE® |
| ● BN740 | Narrow Near-IR Bandpass Filter | 730-755nm | StablEDGE® |
| ● BN785 | Narrow Near-IR Bandpass Filter | 770-790nm | StablEDGE® |
| ● BN810 | Narrow Near-IR Bandpass Filter | 798-820nm | StablEDGE® |
| ● BN850 | Narrow Near-IR Bandpass Filter | 840-865nm | StablEDGE® |
| ● BN880 | Narrow Near-IR Bandpass Filter | 855-890nm | |
| ● BN940 | Narrow Near-IR Bandpass Filter | 928-955nm |
Bi Series — Narrow Bandwidth Interference
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● Bi350 | Near UV Interference Bandpass Filter | 344-358nm | |
| ● Bi385 | Near UV Interference Bandpass Filter | 370-390nm | |
| ● Bi405 | Violet Interference Bandpass Filter | 400-415nm | |
| ● Bi450 | Blue Interference Bandpass | 445-465nm | |
| ● Bi525 | Light Green Interference Bandpass | 518-538nm | |
| ● Bi520 | Light Green Interference Bandpass | 515-525nm | |
| ● Bi550 | Green Interference Bandpass Filter | 535-558nm | |
| ● Bi615 | Amber Interference Bandpass Filter | 605-620nm | |
| ● Bi632 | Light Red Interference Bandpass Filter | 625-640nm | |
| ● Bi650 | Red Interference Bandpass Filter | 643-665nm | |
| ● Bi660 | Dark Red Interference Bandpass Filter | 650-665nm | |
| ● Bi685 | Dark Red Interference Bandpass Filter | 675-692nm | |
| ● Bi725 | Red Edge Bandpass Filter | 717-732nm | |
| ● Bi750 | Near-IR Interference Bandpass Filter | 740-765nm | |
| ● Bi780 | (Limited) Near-IR Interference Bandpass Filter | 765-795nm | |
| ● Bi808 | Near-IR Interference Bandpass Filter | 798-820nm | |
| ● Bi830 | Near-IR Interference Bandpass Filter | 810-850nm | |
| ● Bi832 | Near-IR Interference Bandpass Filter | 822-846nm | |
| ● Bi850 | Near-IR Interference Bandpass Filter | 845-860nm | |
| ● Bi880 | (Limited) Near-IR Interference Bandpass Filter | 870-890nm | |
| ● Bi905 | Near-IR Interference Bandpass Filter | 895-915nm | |
| ● Bi940 | Near-IR Interference Bandpass Filter | 930-952nm | |
| ● Bi1300 | Short-Wave Infrared Bandpass Filter | 1290-1310nm | |
| ● Bi1450 | Short-Wave Infrared Bandpass Filter | 1440-1460nm | |
| ● Bi1550 | Short-Wave Infrared Bandpass Filter | 1540-1560nm |
Multi Bandpass Filters
Dual and triple bandpass filters transmit two or three separate bands and block everything between them. They are the answer when one station has to inspect more than one feature — for example a colour print under white light and a security mark under UV or IR — without a filter wheel and without moving parts. The camera sees only the bands you selected, so each acquisition can be lit by a different source and still share the same optics.
DB Series — Dual Bandpass
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● DB395/870 | Dual Bandpass Absorptive Visible + NIR | 375-425nm, 745-970nm | StablEDGE® |
| ● DB475/850 | Dual Bandpass Blue + 850nm NIR | 460-490nm, 830-870nm | |
| ● DB550/850 | Dual Bandpass Green + 850nm NIR | 535-565nm, 830-870nm | |
| ● DB660/850 | Dual Bandpass Red + 850nm NIR | 645-675nm, 830-870nm | |
| ● DB735 | Dual Bandpass Filter Visible + 735nm NIR | 405-645nm, 725-755nm | |
| ● DB850 | Dual Bandpass Filter Visible + 850nm NIR | 405-645nm, 835-875nm | |
| ● DB940 | Dual Bandpass Filter Visible + 940nm NIR | 405-650nm, 925-965nm |
TB Series — Triple Bandpass
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● TB475/550/850 | Triple Bandpass Blue+Green+850nm NIR | 468-483nm, 543-558nm, 835-865nm | |
| ● TB550/660/850 | Triple Bandpass Green+Red+850nm NIR | 543-558nm, 653-668nm, 835-865nm |
Longpass Filters
A longpass filter blocks everything below a cut-on wavelength and transmits everything above it. In practice it is how you make a camera ignore visible light and see only the infrared you are projecting, or how you cut UV excitation out of a fluorescence image while keeping the emission. The same construction, in its thicker versions, doubles as a lens protection window.
LP Series — Protective Filters
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● LP170 | Fused Silica Protective Window | 200-2300nm | StablEDGE® |
| LP171 | Fused Silica Multi-Layer Vis A/R Coated Protective Window | 380-900nm | StablEDGE® |
| ● LP190 | Sapphire Protective Window | 250-2300nm | StablEDGE® |
| ● LP285 | Borofloat® Multi-Layer VIS A/R Coated Protective Window | 350-1100nm | StablEDGE® |
| ● LP286 | Borofloat® Oleophobic VIS A/R Coated Protective Window | 350-1100nm | StablEDGE® |
| ● LP330 | Industrial-Grade Glass Protective Window | 350-1100nm | StablEDGE® |
| ● LP340 | Industrial-Grade Multi-Layer VIS A/R Coated Glass Protective Window | 350-800nm | StablEDGE® |
| ● LP341 | Industrial-Grade Oleophobic VIS A/R Coated Glass Protective Window | 365-1100nm | StablEDGE® |
| ● LP345 | Precision Multi-Layer VIS A/R Coated Glass Protective Window | 350-800nm | StablEDGE® |
| ● LP347 | Near-IR A/R Coated Glass Protective Window | 690-1090nm | |
| ● LP389 | Precision Multi-Layer VIS + NIR A/R Coated Glass Protective Window | 400-1100nm | StablEDGE® |
| ● LP390 | UV-Absorbing Protective Window | 410-1100nm | StablEDGE® |
| ● LP415 | UV Block A/R Protective Window | 415-1100nm | |
| ● LP418 | UV Block A/R Protective Window | 425-1100nm | |
| ● LP8000 | (Limited) Germanium DLC Coated LWIR Protective Window | 7500-12500nm | StablEDGE® |
LP Series — Longpass
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● LP470 | Light Yellow Longpass Filter | 480-1100nm | StablEDGE® |
| ● LP500 | Yellow Longpass Filter | 510-1100nm | StablEDGE® |
| ● LP515 | Yellow-Orange Longpass Filter | 520-1100nm | StablEDGE® |
| ● LP530 | Orange Longpass Filter | 545-1100nm | StablEDGE® |
| ● LP550 | Orange Longpass Filter | 560-1100nm | StablEDGE® |
| ● LP580 | Red-Orange Longpass Filter | 585-1100nm | StablEDGE® |
| ● LP590 | Red Longpass Filter | 605-1100nm | StablEDGE® |
| ● LP610 | Red Longpass Filter | 620-1100nm | StablEDGE® |
| ● LP630 | Red Longpass Filter | 645-1100nm | StablEDGE® |
| ● LP645 | Dark Red Longpass Filter | 650-1100nm | StablEDGE® |
| ● LP665 | Dark Red Longpass Filter | 680-1100nm | StablEDGE® |
| ● LP695 | Near-IR Longpass Filter | 715-1100nm | StablEDGE® |
| ● LP715 | Near-IR Longpass Filter | 730-1100nm | StablEDGE® |
| ● LP780 | Near-IR Longpass Filter | 800-1100nm | StablEDGE® |
| ● LP800 | Near-IR Longpass Filter | 820-1100nm | StablEDGE® |
| ● LP815 | Near-IR Longpass Filter | 825-1100nm | StablEDGE® |
| ● LP830 | Near-IR Longpass Filter | 845-1100nm | StablEDGE® |
| ● LP850 | Near-IR Longpass Filter | 870-1100nm | StablEDGE® |
| ● LP900 | Near-IR Longpass | 910-1100nm | |
| ● LP920 | VIS Block Short-Wave Infrared Longpass Filter | 930-2300nm | |
| ● LP1000 | Short-Wave Infrared Longpass Filter | 1010-2300nm | StablEDGE® |
| ● LP1070 | Short-Wave Infrared Longpass Filter | 1100-2300nm | StablEDGE® |
| ● LP1475 | Short-Wave Infrared Longpass Filter | 1490-2300nm | |
| ● LP1850 | (Limited) Short-Wave Infrared Longpass Filter | 1900-12,000nm | StablEDGE® |
Shortpass / NIR-cut Filters
A shortpass filter does the opposite: it transmits the visible and blocks the near infrared. Silicon sensors are sensitive well beyond what the eye sees, and that invisible extra light is what makes colours drift and whites look warm. A NIR cut filter in front of the lens restores colour fidelity and keeps colour inspection repeatable when sunlight or incandescent lighting reaches the cell.
SP Series — VIS Pass
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● SP510 | Blue Shortpass Filter | 340-500nm | |
| ● SP570 | Blue-Green Shortpass Filter | 410-560nm | |
| ● SP585 | Cyan Shortpass Filter | 395-575nm | |
| ● NF550 | Magenta Dichroic Shortpass Filter (Green Block) | 395-475nm, 605-700nm |
SP Series — VIS Pass/NIR Block
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● SP651 | Near-UV/Visible Pass and Near-IR/Mid-Red Dichroic Block Shortpass Filter | 355-635nm | |
| ● SP625 | Blue-Orange Shortpass Filter | 425-620nm | |
| ● SP635 | Absorptive Visible Shortpass/Near-IR Block Filter | 380-585nm | StablEDGE® |
| ● SP644 | Near-IR/Mid-Red Dichroic Block Shortpass Filter | 395-638nm | |
| ● SP645 | Near-IR/Mid-Red Dichroic Block Shortpass Filter | 400-640nm | |
| ● SP650 | Near-IR/Mid-Red Dichroic Block Shortpass Filter | 400-640nm | |
| ● SP675 | Near-IR/Deep Red Dichroic Block Shortpass Filter | 355-635nm | |
| ● SP700 | Near-IR/UV Block-Visible Shortpass Filter | 405-690nm | |
| ● SP701 | Extended Hot Mirror/Reflects Near-IR Wavelengths up to 1550nm | 410-690nm | |
| ● SP705 | Near-IR/Deep Red Absorptive Block Shortpass Filter | 370-630nm | StablEDGE® |
| ● SP713 | Extended Hot Mirror / Reflects up to 1300nm | 420-695nm | |
| ● SP730 | Near-IR/Colorless Dichroic Block Shortpass Filter | 400-710nm | |
| ● SP785 | Modified Near-IR Dichroic Block Shortpass Filter | 425-770nm | |
| ● SP870 | Near-IR Dichroic Multispectral Shortpass Filter | 415-870nm | |
| ● SP910 | Near-IR Dichroic Shortpass Filter | 420-905nm |
Neutral Density Filters
Neutral density filters reduce intensity without changing colour. They are used when the scene is too bright for the exposure you need — a fast line that forces a short shutter, or a lens that has to stay wide open to control depth of field. Reducing light optically rather than closing the iris keeps the optical geometry you chose.
NX Series
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● NX030 | Neutral Density Filter – Low Reflectivity 50% Transmission | 400-2000nm | |
| ● NX060 | Neutral Density Filter – Low Reflectivity 25% Transmission | 400-2000nm | |
| ● NX090 | Neutral Density Filter – Low Reflectivity 12.5% Transmission | 400-2000nm | |
| ● NX120 | Neutral Density Filter – Low Reflectivity 6.25% Transmission | 400-2000nm |
ND Series — VIS
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● ND030 | Neutral Density Filter – Absorptive 50% Transmission | 425-675nm | |
| ● ND060 | Neutral Density Filter – Absorptive 25% Transmission | 425-675nm | |
| ● ND090 | Neutral Density Filter – Absorptive 12.5% Transmission | 425-675nm | |
| ● ND120 | Neutral Density Filter – Absorptive 6.25% Transmission | 425-675nm | |
| ● ND200 | Neutral Density Filter – Absorptive 1.0% Transmission | 425-675nm | |
| ● ND300 | Neutral Density Filter – Absorptive 0.1% Transmission | 425-675nm | |
| ● ND400 | Neutral Density Filter – Absorptive 0.01% Transmission | 425-675nm |
Ni Series — VIS/SWIR
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● Ni030 | (Limited) Neutral Density Filter – Low Reflectivity 50% Transmission | 400-2000nm | |
| ● Ni060 | (Limited) Neutral Density Filter – Low Reflectivity 25% Transmission | 400-2000nm | |
| ● Ni090 | (Limited) Neutral Density Filter – Low Reflectivity 12.5% Transmission | 400-2000nm | |
| ● Ni120 | (Limited) Neutral Density Filter – Low Reflectivity 6.25% Transmission | 400-2000nm | |
| ● Ni200 | (Limited) Neutral Density Filter – Reflective 1% Transmission | 400-2000nm |
Polarizing Filters
Polarizers remove specular reflection. A linear polarizer on the illuminator and a second one on the lens, crossed at ninety degrees, suppress the mirror-like glare from glass, film, wet surfaces, painted metal and moulded plastic, and leave the diffuse light that carries the information. It is the single most effective way to read a code through a shiny wrapper or to find a defect under a gloss finish.
Polarizing Film
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● PS007 | High Contrast Linear Polarizer Film .007″ thk | 400-700nm | |
| ● PSA007 | High Contrast Linear Polarizing Film .007″ thk Self Adhesive | 400-700nm | |
| ● PS010 | High Contrast Linear Polarizer Film .010″ thk | 400-700nm | |
| ● PS030 | Ultra High Contrast Linear Polarizer Film .030″ thk | 400-700nm | |
| ● PS1000 | (Discontinued) VIS/SWIR Wire Grid Linear Polarizer Film | 400-2000nm | |
| ● PSA1000 | VIS/SWIR Wire Grid Linear Polarizer Film with Adhesive Back | 400-2000nm | |
| ● HT025 | High Temperature Linear Polarizing Film .025″ | 400-700nm | |
| ● HT008 | High Temperature Linear Polarizing Film .008″ thk | 400-700nm | |
| ● HTA008 | High Temperature Linear Polarizing Film .008″ thk Self Adhesive | 400-700nm |
Polarizing Filters
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● PR032 | Linear Polarizer | 400-700nm | |
| ● PR120 | Ultra High Contrast Linear Polarizer | 400-700nm | |
| ● PR1000 | VIS/SWIR Wire Grid Linear Polarizer Mounted Filter | 400-2000nm | |
| ● PC052 | Circular Polarizer | 400-700nm | |
| ● PG120 | High Temperature Ultra High Contrast Glass Linear Polarizer Filter 2.5mm thk | 400-700nm | |
| ● PG1000 | VIS/SWIR Wire Grid Linear Polarizer Unmounted Filter | 400-2000nm |
Acrylic Polarizers
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| PA371 | Ultra-High Contrast Oleophobic Coated Acrylic Linear Polarizer | 400-700nm | |
| PA385 | Ultra-High Contrast Cell Cast Acrylic Linear Polarizer | 400-700nm | |
| PA401 | Ultra-High Contrast Oleophobic Coated Acrylic Linear Polarizer | 400-700nm | |
| PA1000 | VIS/NIR Wire Grid Oleophobic Coated Acrylic Linear Polarizer Window | 400-2000nm |
Protective Filters
Protective filters are sacrificial windows. They take the scratches, the weld spatter, the cleaning cycles and the impacts that would otherwise reach the front element of a lens that costs far more than the window. Available as plain glass, as longpass versions that also filter, and in acrylic for large apertures.
AC Series — Acrylic Longpass
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● AC370 | Acrylic Oleophobic VIS A/R Coated Protective Window | 380-850nm | StablEDGE® |
| ● AC380 | Acrylic VIS A/R Protective Window | 400-850nm | StablEDGE® |
| ● AC385 | Hard-Coated Acrylic Protective Window | 390-1100nm | StablEDGE® |
| AC389 | Acrylic VIS + NIR A/R Coated Protective Window | 420-1100nm | StablEDGE® |
| ● AC400 | Acrylic Oleophobic VIS A/R Coated UV-Block Protective Window | 415-1100nm | StablEDGE® |
LP Series — Lens Protection
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● LP170 | Fused Silica Protective Window | 200-2300nm | StablEDGE® |
| LP171 | Fused Silica Multi-Layer Vis A/R Coated Protective Window | 380-900nm | StablEDGE® |
| ● LP190 | Sapphire Protective Window | 250-2300nm | StablEDGE® |
| ● LP285 | Borofloat® Multi-Layer VIS A/R Coated Protective Window | 350-1100nm | StablEDGE® |
| ● LP286 | Borofloat® Oleophobic VIS A/R Coated Protective Window | 350-1100nm | StablEDGE® |
| ● LP330 | Industrial-Grade Glass Protective Window | 350-1100nm | StablEDGE® |
| ● LP340 | Industrial-Grade Multi-Layer VIS A/R Coated Glass Protective Window | 350-800nm | StablEDGE® |
| ● LP341 | Industrial-Grade Oleophobic VIS A/R Coated Glass Protective Window | 365-1100nm | StablEDGE® |
| ● LP345 | Precision Multi-Layer VIS A/R Coated Glass Protective Window | 350-800nm | StablEDGE® |
| ● LP347 | Near-IR A/R Coated Glass Protective Window | 690-1090nm | |
| ● LP389 | Precision Multi-Layer VIS + NIR A/R Coated Glass Protective Window | 400-1100nm | StablEDGE® |
| ● LP390 | UV-Absorbing Protective Window | 410-1100nm | StablEDGE® |
| ● LP415 | UV Block A/R Protective Window | 415-1100nm | |
| ● LP8000 | (Limited) Germanium DLC Coated LWIR Protective Window | 7500-12500nm | StablEDGE® |
Acrylic Filters
Acrylic filters cover the sizes that glass cannot reach economically. They are cut to shape for large fields, for enclosures and for placement in front of the illuminator rather than the lens, where a lightweight, impact-resistant material is preferable.
AB Series — Acrylic Bandpass
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● AB555 | Acrylic Absorptive Near-IR/UV-Block Visible Bandpass Filter | 470-645nm | StablEDGE® |
AC Series — Acrylic Longpass
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● AC370 | Acrylic Oleophobic VIS A/R Coated Protective Window | 380-850nm | StablEDGE® |
| ● AC380 | Acrylic VIS A/R Protective Window | 400-850nm | StablEDGE® |
| ● AC385 | Hard-Coated Acrylic Protective Window | 390-1100nm | StablEDGE® |
| AC389 | Acrylic VIS + NIR A/R Coated Protective Window | 420-1100nm | StablEDGE® |
| ● AC400 | Acrylic Oleophobic VIS A/R Coated UV-Block Protective Window | 415-1100nm | StablEDGE® |
| ● AC685 | Acrylic NIR Longpass Filter | 710-1100nm | StablEDGE® |
| ● AC760 | Acrylic NIR Longpass Filter | 780-1100nm | StablEDGE® |
| ● AC800 | Acrylic Near-IR Longpass Filter | 815-1100nm | StablEDGE® |
| ● AC850 | Acrylic Near-IR Longpass Filter | 880-1100nm | StablEDGE® |
| ● AC900 | Acrylic Short-Wave Infrared Longpass Filter | 930-1100nm | StablEDGE® |
| ● AC915 | Acrylic Short-Wave A/R Coated Infrared Longpass Filter | 960-1650nm; 1750-1890nm; 1925-2090nm | StablEDGE® |
Light Balancing Filters
Light balancing filters correct the colour temperature of a source so that a colour camera sees neutral whites. They are used where the illumination is fixed and the colour reference is not negotiable — print, textile, food grading, paint matching.
LA Series | LB Series | FL Series
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● LA080 | Light Balancing Filter (Minus Blue) | 400-700nm | StablEDGE® |
| ● LA120 | Light Balancing Filter (Minus Blue) | 400-700nm | StablEDGE® |
| ● LB080 | Light Balancing Filter (Minus Red) | 400-700nm | StablEDGE® |
| ● LB120 | Light Balancing Filter (Minus Red) | 400-700nm | StablEDGE® |
| ● FL550 | Light Balancing Filter (Minus Green) | 400-700nm | StablEDGE® |
Diffuser Filters
Diffusers convert a directional beam into a soft, even field. Placed in front of a bar or panel illuminator they remove hot spots and the visible structure of the LED matrix, which is what makes a low-cost backlight out of a direct illuminator, or what allows a shiny curved surface to be imaged without a bright line across it.
Acrylic
| ITEM CODE | Description | Useful range | Edge technology |
|---|---|---|---|
| ● DF035 | Acrylic Diffuser | .8mm | |
| ● DF045 | Acrylic Diffuser | 2mm | |
| ● DF050 | Acrylic Diffuser | 1.5mm | |
| ● DF055 | Acrylic Diffuser | 1mm | |
| ● DF065 | Acrylic Diffuser | 1mm | |
| ● DF070 | Acrylic Diffuser | 1mm | |
| ● DF075 | Acrylic Diffuser | 1mm | |
| ● DF080 | Acrylic Diffuser | 1mm | |
| ● DF085 | Acrylic Diffuser | 1mm | |
| ● DF090 | Acrylic Diffuser | 1mm | |
| ● DF093 | Acrylic Diffuser | 1mm |
Mounts, sizes and how to order
Every filter is available mounted or unmounted. Mounted versions are ready to thread onto the lens or the camera; unmounted glass is cut to shape for integration inside an enclosure, in front of an illuminator or into a custom optical assembly.
| Mounting | Use | Sizes |
|---|---|---|
| Threaded mount | Lenses with a filter thread — the standard case | M13.25 · M22.5 · M25.5 · M27 · M30.5 · M34 · M35.5 · M37 · M37.5 · M39 · M40.5 · M43 · M46 · M48 · M49 · M52 · M55 · M58 · M62 · M67 · M72 · M77 · M82 · M86 · M95 · M105 |
| C-mount 25.4 | Threads directly into the camera, between camera and lens | 25.4 mm |
| Slip mount | Lenses without a filter thread | Sized on the outer diameter of the lens barrel |
| Unmounted | Integration inside machines, in front of illuminators, custom optics | Round or rectangular, cut to drawing |
| Custom | S-mount and board-level optics, special assemblies | On specification |
To order, we need three things: the filter code, the mounting type and the size. If you do not know the thread size, the diameter is marked on the front ring of the lens, next to the ⌀ symbol. If you are not sure which filter, describe the application instead — see the section below.
How to specify a filter in four questions
Answering these four in order eliminates almost every wrong choice, and it is the same sequence we follow when a customer sends us an application.
- What is lighting the scene? The filter follows the illuminator, not the other way round. A red 630 nm bar wants a red bandpass; a UV source used for fluorescence wants a filter that blocks the excitation and passes the emission.
- What competes with it? Sunlight through a skylight, fluorescent ceiling lamps, a neighbouring laser, the glow of a heater. The wider the gap between your source and the interference, the more effective the filter.
- Is the surface glossy? If the defect disappears under a reflection, the answer is polarization before it is anything else — a polarizer on the light, a second one on the lens, crossed.
- Is colour part of the measurement? If yes, the near infrared has to go: a NIR-cut filter is what makes a colour inspection repeatable, and a light balancing filter is what makes the white reference correct.
Send us the answers together with a photograph of the part, and we will specify filter, mount and size along with the illuminator. Sample filters can be supplied for evaluation before the order.
Do you want help choosing the right product?
Contacts & Information
Contact for general information : info@roder.it
Systems and Sensor Integration Partner : www.roder.it
RODER Artificial Vision Division : www.visiotronix.com
RODER Instruments Division : www.innovacheck.com
More information about VISIOTRONIX : about us
The information on this website is provided for informational purposes only. Although it has been prepared with the utmost care, it does not constitute a contractual offer or a binding commitment to supply. It may contain transcription, translation, or typographical errors. For precise and up-to-date information, please contact our company directly.
Please note: Some images on this website have been intentionally generated using Artificial Intelligence (AI). This is due to the fact that, for many applications and projects, it is not possible to disclose photographs of the actual installation or system due to confidentiality agreements, contractual clauses, and Non-Disclosure Agreements (NDAs).