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 a lens on a substrate, the method comprising:
- making contact between a drop of curable liquid and a substrate;
- dispensing a predetermined volume of the curable liquid from a dispenser onto the substrate while the curable liquid is in contact with the substrate, the curable liquid having a viscosity of at least 100 cps;
- and
- curing the curable liquid to a solid form.
An epoxy or polymer lens on a substrate, the lens characterized by a circular aperture having a diameter, wherein the lens has a height that is at least equal to a height of a curable liquid drop of a same diameter supported by the substrate, the liquid drop having a viscosity of at least 100 cps.
Dependencies are inferred from the claim text.