Fresnel lens with textured draft surfaces
AssigneeFacebook Technologies, LLC
InventorsKurt Jenkins, Shizhe Shen
Life of this patent
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AssigneeFacebook Technologies, LLC
InventorsKurt Jenkins, Shizhe Shen
Estimating the term…
A method for preparing a die for molding of a Fresnel lens includes obtaining a first die block that defines at least one or more portions of a Fresnel lens. The one or more portions defined in the first die block correspond to a plurality of slope facets and a plurality of draft facets. The method also includes adding textures to one or more portions of the first die block that correspond to at least a portion of the plurality of draft facets. A method of making a Fresnel lens includes obtaining the first die block, obtaining a second die block, and coupling the first and the second die blocks. The method also includes providing a molding material into a space defined between the first and the second die blocks, curing the molding material, and removing the Fresnel lens from the first and/or the second die block.
A method for preparing a die for molding a Fresnel lens, the method comprising:
A method of making a Fresnel lens, the method comprising:
Dependencies are inferred from the claim text.