OPCO (Fitchburg, MA) offers a replication process that reproduces complex optics. The process transfers the profile of a precision optical surface from a master, creating an exact duplicate on a variety of substrates. The replicated optics are less expensive and in many cases lighter than the master. This process can be used to produce a range of both ruled and holographic diffraction gratings, reflective and transmission holographic optical elements, and dual wavelength gratings, as well as plano and conic sections. Substrate materials include glass, silicon carbide, ceramic, and metals such as beryllium, aluminum, titanium, stainless steel, and others. Diffraction gratings are produced in sizes up to 110mm × 110mm with groove densities from 40 g/mm to 3,600 g/mm, with available wavelengths from the deep UV to the far IR.
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