US Patent 11163142 One-piece optical element with diaphragm
Patent 11163142 was granted and assigned to Idemia on November, 2021 by the United States Patent and Trademark Office.
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A one-piece optical element (1) consisting of a material transparent to light, comprising a diaphragm (5) formed in the mass of said transparent material, the diaphragm (5) comprising an orifice consisting of said transparent material, suitable for the passage of light through said orifice, and a screen consisting of said transparent material surrounding said orifice (6), said screen opposing the passage of light therethrough and being formed by a succession of modified layers formed of the transparent material, separated from each other, and having a modified refractive index different from the refractive index of the transparent material in the rest of the optical element.
US Patent 11163142 One-piece optical element with diaphragm
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