Request InfoGrintech GmbHGrintech GmbH has launched a series of gradient index (GRIN) objective lenses for endoscopic imaging optics. Made of a nontoxic silver-based glass material, the lenses have plane surfaces and low chromatic aberration. Aperture and field stops are available upon request. Diameters are from 2.0 to 0.25 mm, and users may choose standard working distances from 5 mm to infinity and standard lens lengths from 0.56 to 6.64 mm. Several other options allow users to customize the lenses for their specific needs. Each lens in the line is available with or without antireflection coating. 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