Microreplicated achromatic lens
Assignee3M Innovative Properties Company
InventorsStephen K. Eckhardt, James N. Dobbs
Life of this patent
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Abstract
A microreplicated achromatic lens is disclosed. The article includes a web including first and second opposed surfaces. The first surface includes a first microreplicated structure having a plurality of first features. The second surface includes a second microreplicated structure having a plurality of second features. Opposing first and second features are registered to within 10 micrometers. Corresponding opposed first and second features cooperate to form an achromatic microlens element.
Claims19
A microreplicated achromatic lens comprising:
- a flexible substrate having first and second opposed surfaces;
- a first coated microreplicated pattern on the first surface, wherein the first coated pattern comprises a cured first liquid;
- and
- a second coated microreplicated pattern on the second surface, wherein the second coated pattern comprises a cured second liquid,
- wherein the first and second patterns are registered to within 10 micrometers and form an achromatic lens, and wherein the first and second cured liquids have different dispersions.
A method of making an article including a plurality of microreplicated achromatic lens features, the method comprising:
- providing a substrate, in web form, having first and second opposed surfaces;
- and
- passing the substrate through a roll to roll casting apparatus to form a plurality of achromatic lens features, wherein the achromatic lens features comprise a first microreplicated positive lens on the first surface formed from a first cured liquid and a second microreplicated negative lens on the second surface formed from a second cured liquid, wherein the first and second cured liquids have different dispersions, and wherein the first and second microreplicated lenses are registered to within about 10 micrometers.
Dependencies are inferred from the claim text.