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US 11,231,523 B2Granted
Fabrication of polydimethylsiloxane optical material
AssigneeUniversity of Houston System
InventorsWei-Chuan Shih, Yu-Lung Sung
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Abstract
A lithography-free, mold-free method of fabricating high quality optical material by curing polydimethylsiloxane (PDMS) droplets in or on pre-heated substrates allows lenses with different focal lengths to be made by varying the volume and surface temperature, as well as the substrate.
Claims7
A method for fabricating an optical lens having a concave shape, comprising:
- heating a substrate to a pre-selected temperature to produce a heated substrate;
- depositing a volume of polydimethylsiloxane (PDMS) in liquid form onto a surface of the heated liquid substrate;
- injecting a volume of injection liquid into the volume of polydimethylsiloxane (PDMS);
- and
- allowing the volume of polydimethylsiloxane (PDMS) to cure to solid form around the injection liquid to create an optical lens having a concave shape, a diameter and a focal length,
- wherein the volume of polydimethylsiloxane (PDMS), the volume of liquid, and the pre-selected temperature are selected to optimize the diameter and the focal length of the optical lens.
3 more elements
Dependencies are inferred from the claim text.