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US 9,851,475 B2Granted
Fabrication of lenses using high viscosity liquid
AssigneeRicoh Company, Ltd.
InventorsSri Rama Prasanna Pavani, Brian P. McCall
Life of this patent
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Abstract
A method for fabricating millimeter and sub-millimeter size lenses using a high viscosity curable liquid, such as epoxy. The method comprises dispensing a predetermined volume of the curable liquid onto a substrate. The curable liquid preferably has a viscosity higher than 100 cps. Additionally, to reduce spherical aberration, the curable liquid can be cured upside down to leverage the effects of gravity.
Claims20
A method for fabricating lenses on a substrate, the method comprising:
- making contact between a dispenser and a surface of a substrate;
- dispensing a predetermined volume of a curable liquid from the dispenser onto the surface of the substrate while the dispenser is in contact with the surface of the substrate and while the curable liquid is in contact with the surface of the substrate, the curable liquid having a viscosity of at least 100 cps;
- and
- curing the predetermined volume of curable liquid to a solid form, the predetermined volume of curable liquid forming one single lens;
- and
- repeating the above steps, each dispensed predetermined volume of the curable liquid cured to form one single lens.
3 more elements
Dependencies are inferred from the claim text.