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Pinholes are mounted in a 16-mm-diameter black-anodized aluminum carrier. Pinholes mounted in a 16-mm-diameter black-anodized aluminum carrier are centered to within 0.25 mm. We suggest our model 2100 lens centering cell for spatial filtering and light control applications, and our models 45 or 85-45 with model 35-10 lens mounts for applications involving switching of pinhole sizes. Other aperture sizes, special surface preparation, and special materials are also available, including ceramic apertures.
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