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PTR Optics
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Manufacturer of precision optical components including gratings, HSE/NPL test slides, flats, filters, and monochromators. England.
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Sub 1 Optics
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Manufacturer of low-scatter and superpolished optical substrates. Specializes in plano windows and mirrors with better than 1 angstrom surface roughness. California.
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Changchun Fortune Optronics,Inc.
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Manufacturer of precision optics including Lenses, windows, mirrors, and prisms. Specializing in cylindrical, ball, and rod lenses. China
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