公开(公告)号：US11073641B2

公开(公告)日：2021-07-27

申请号：US16126778

申请日：2018-09-10

Applicant: ORAFOL AMERICAS INC.

Inventor： Steven Scott ,  Arthur J. Davis

IPC: G02B5/124 ,  B29D11/00

Abstract: A method for forming a retroreflective prism in a substrate includes inserting and retracting a single point diamond tool through a surface of the substrate while moving the single point diamond tool, the substrate, or both the single point diamond tool and the substrate in a direction of travel along at least one axis to generate a facet in the substrate having a facet face parallel to the direction of travel of at least one of the single diamond point tool or the substrate. The facet face has an angle defined by a chiseling edge of the single point diamond tool. The inserting and retracting is repeated at a plurality of locations on the substrate to form an array of retroreflective microstructures on the surface of the substrate. At least one of the array of retroreflective microstructures is a retroreflective prism having a polygonal projected aperture.

公开(公告)号：US20150234284A1

公开(公告)日：2015-08-20

申请号：US14701040

申请日：2015-04-30

Applicant: Orafol Americas Inc.

Inventor： Steven Scott

IPC: G03F7/20 ,  G03F7/30 ,  G02B5/124

CPC classification number: G03F7/2059 ,  B29D11/00605 ,  G02B5/124 ,  G03F7/0005 ,  G03F7/24 ,  G03F7/30

Abstract: Methods for producing retroreflector tooling and retroreflective sheeting using laser writing techniques, and corresponding products thereof, are presented. In one embodiment, a seamless retroreflective sheet having a plurality of retroreflectors formed in a continuous retroreflective microstructured pattern is provided. In the methods described herein, a substrate having a photosensitive coating on a surface thereof is provided. A surface-relief microstructured pattern is produced in the photosensitive coating by selectively exposing the photosensitive coating to a beam of electromagnetic radiation. The exposed portions of the photosensitive coating are developed to form a retroreflective microstructured pattern on the surface of the substrate. The retroreflective microstructured pattern is then transferred into retroreflector tooling comprising the retroreflective microstructured pattern on a surface thereof. A retroreflective sheet containing the retroreflective microstructured pattern on a surface thereof is then formed from the retroreflector tooling.

Abstract translation: 提出了使用激光写入技术制造后向反射器工具和逆反射片材的方法及其相应产品。 在一个实施例中，提供了一种具有以连续逆反射微结构化图案形成的多个后向反射器的无缝逆反射片。 在本文所述的方法中，提供了在其表面上具有感光涂层的基板。 通过选择性地将感光涂层暴露于电磁辐射束，在感光涂层中产生表面浮雕微结构图案。 显影感光涂层​​的曝光部分以在基材的表面上形成回射微结构图案。 然后将后向反射微结构化图案转移到包括其表面上的回射微结构图案的回射器工具中。 然后从后向反射器工具形成包含其表面上的逆反射微结构图案的逆反射片。

公开(公告)号：US20190079223A1

公开(公告)日：2019-03-14

申请号：US16126778

申请日：2018-09-10

Applicant: ORAFOL AMERICAS INC.

Inventor： Steven Scott ,  Arthur J. Davis

IPC: G02B5/124 ,  B29D11/00

Abstract: A method for forming a retroreflective prism in a substrate includes inserting and retracting a single point diamond tool through a surface of the substrate while moving the single point diamond tool, the substrate, or both the single point diamond tool and the substrate in a direction of travel along at least one axis to generate a facet in the substrate having a facet face parallel to the direction of travel of at least one of the single diamond point tool or the substrate. The facet face has an angle defined by a chiseling edge of the single point diamond tool. The inserting and retracting is repeated at a plurality of locations on the substrate to form an array of retroreflective microstructures on the surface of the substrate. At least one of the array of retroreflective microstructures is a retroreflective prism having a polygonal projected aperture.

公开(公告)号：US09910357B2

公开(公告)日：2018-03-06

申请号：US14701040

申请日：2015-04-30

Applicant: Orafol Americas Inc.

Inventor： Steven Scott

IPC: G02B5/124 ,  G03F7/20 ,  G03F7/30

CPC classification number: G03F7/2059 ,  B29D11/00605 ,  G02B5/124 ,  G03F7/0005 ,  G03F7/24 ,  G03F7/30

Abstract: Methods for producing tooling and sheeting using laser writing techniques, and corresponding products thereof, are presented. In one embodiment, a seamless sheet having a plurality of microstructures formed in a continuous microstructured pattern is provided. In the methods described herein, a substrate having a photosensitive coating on a surface thereof is provided. A surface-relief microstructured pattern is produced in the photosensitive coating by selectively exposing the photosensitive coating to a beam of electromagnetic radiation. The exposed portions of the photosensitive coating are developed to form a microstructured pattern on the surface of the substrate. The microstructured pattern is then transferred into retroreflector tooling comprising the microstructured pattern on a surface thereof. A sheet containing the microstructured pattern on a surface thereof is then formed from the retroreflector tooling.