Back to results
US 10,649,120 B2Granted
Optical element, article, and method of producing optical element
AssigneeToppan Printing Co., Ltd.
InventorNaoki Minamikawa
Life of this patent
Estimating the term…
Abstract
An optical element includes a conversion layer and a metal piece layer. The conversion layer is provided with a light-incidence surface including an uneven surface, the conversion layer being configured to receive light incident on the uneven surface and output the light from the uneven surface as light in a different state than the incident light. The metal piece layer is configured by a plurality of metal pieces to cover at least part of the uneven surface.
Claims17
An optical element comprising:
- a conversion layer provided with a light-incidence surface including an uneven surface portion, the conversion layer being configured to receive light that is incident on the uneven surface and output the light from the uneven surface portion as light in a different state than the incident light;
- and
- a metal piece layer configured by a plurality of metal pieces to cover at least part of the uneven surface portion, wherein:
- the light-incidence surface further includes a flat surface portion which is flatter than the uneven surface portion;
- the uneven surface portion includes a plurality of concavities;
- each concavity of said plurality of concavities has a top portion and a bottom portion, which is further from the flat surface portion in a thickness direction of the conversion later than the top portion;
- and
- a thickness of the metal layer in the bottom portion of the concavity is larger than a thickness of the metal layer in the top portion of the concavity.
5 more elements
A method of producing an optical element comprising:
- forming a conversion layer provided with a light-incidence surface that includes an uneven surface portion and a flat surface portion flatter than the uneven surface portion, the light-incidence surface receiving light incident on the uneven surface portion and outputting the light from the uneven surface portion as light in a different state than the incident light;
- forming a metal piece layer configured by a plurality of metal pieces in at least part of the uneven surface portion and in at least part of the flat surface portion;
- and
- transferring at least part of the metal piece layer formed on the flat surface portion to the uneven surface portion, by applying a force to the metal piece layer formed on the flat surface portion, the force being applied in a shearing-direction relative to the metal piece layer, wherein:
- the uneven surface portion includes a plurality of concavities;
- each concavity of said plurality of concavities has an opening portion and a bottom portion,
- which is further from the flat surface portion in a thickness direction of the conversion later than the top portion;
- and
- a thickness of the metal layer in the bottom portion of the concavity is larger than a thickness of the metal layer in the top portion of the concavity.
6 more elements
Dependencies are inferred from the claim text.