National Aperture
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Frequently Asked Questions

The applications include laser optics, spatial filtering, and microscopy.

The available options include gold plated both sides, heavy substrate, close tolerance, calibrated, mounted, and unmounted.

The diameter is 3/8 inch (0.3753 inch max.), 9.53mm.

The finish is gold plated on one side and reverse side flat poly black up to 98% emissivity in visible and near infrared.

The thickness is 0.001 inch (25µm) nominal.

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