Infrared Cameras WGF™ Camera Filter

Asahi Kasei’s WGF Type Metal Grille CAMERA FILTER covers broadband imaging from CMOS to InGaAs.

What the filter can do

When light reflects off an object, its polarization state changes. It is possible to preferentially inhibit the reflected light that interacts with the imaging by using a polarizing filter.

Image credit: Asahi Kasei Corporation

Polarization filter for infrared cameras

WGF Camera filter

The WGF camera filter can be connected to the camera lens as usual, and the user can start using it immediately. It is capable of broadband imaging from CMOS to InGaAs.

Infrared cameras WGF™ camera filter to detect transparent contamination

Image credit: Asahi Kasei Corporation

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Flexible structure A practical double structure with a fixed frame that can be attached to a lens as it is and a rotating frame that allows you to freely adjust the polarization axis. Both have the same diameter.
Range of filter diameters M40.5 M46 M52 M55 M58 M77mm
Range of 6 types. Applicable to most sizes with progressive rings.
coating The filter part has a two-layer structure of mesh film and glass, and is not coated with AR. It is environmentally friendly because the metal grid layer is not exposed to the outside.
Optical performance

Single transmission: 39.98%
Extinction rate: 1,500
*Average at 850-1800 nm
* These data are reference values

* These data are reference values

Option Please contact us for special sizes and polarizing filters for light sources. You can get better anti-reflective effect by using WGF for the light source and the camera.

Examples of solutions

Observation of reflected light

Imaging of a face wearing glasses.

Imaging of a face wearing glasses. Image credit: Asahi Kasei Corporation

Reading the QR code through a packaging film.

Reading the QR code through a packaging film. Image credit: Asahi Kasei Corporation

Inspection of the transmission inside the ink tank of the printer.

Inspection of the transmission inside the ink tank of the printer. Image credit: Asahi Kasei Corporation

Transmission inspection of perishable foods.

Transmission inspection of perishable foods. Image credit: Asahi Kasei Corporation

There is no need to forego detection, such as transparent contamination or an extraordinary part, such as image inspection with WGF camera filters and InGaAs sensors detect things like transparent contamination and extraordinary parts that would otherwise go undetected.

Polarization can also be used to identify contaminants in opaque containers and contaminants of the same color as liquids.

Many resins exhibit a phase contrast effect. When two WGFs are placed as a nicole cross in front of the light source and the sensor, the light from the light source cannot come into contact with the sensor, while the light whose polarization axis is rotated or depolarized by the characteristics of the resin can meet the sensor.

Infrared cameras WGF™ camera filter to detect transparent contamination

Image credit: Asahi Kasei Corporation

Examples of solutions

Observation in transmitted light

Detection of a resin fragment in an opaque bag filled with water.

Detection of a resin fragment in an opaque bag filled with water. Image credit: Asahi Kasei Corporation

Detection of resin fragments in a liquid.  Left bottle) water, right bottle) coffee.

Detection of resin fragments in a liquid. Left bottle) water, right bottle) coffee.Image credit: Asahi Kasei Corporation

WGF The camera filter is an innovative product that can be purchased for a trial.

Polarizer for high intensity polarized lighting

When used for high intensity polarized illumination, traditional polarizers will warp or break. WGF is compatible with high intensity halogen lighting.

Moreover, by successively using reflected light on WGFbrightness can be increased.

WGF panels which can polarize the light source are also available. Think of it as a series for use with the WGFMT camera filter.

WGF™ panel for a polarized light source with WGF™ sheets laminated to glass.

WGF panel for a polarized light source with WGF sheets laminated on glass.Image credit: Asahi Kasei Corporation

This information has been obtained, reviewed and adapted from materials provided by Asahi Kasei Corporation.

For more information on this source, please visit Asahi Kasei Society.

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