# US 2015/0146435 A1 · Lens assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0146435 A1 - Document ID: US20150146435A1 - Status: Published application - Kind: A1 - Application number: 14/496,333 - Filed: 2014-09-25 - Published: 2015-05-28 - Earliest claimed: 2013-11-25 - Assignees: UTC Fire & Security Americas Corporation, Inc. - Applicants: Utc Fire & Security Americas Corporation, Inc. - Inventors: Thomas Greenwood; Martin Paul Robotham - Web page: https://patentgrep.com/patent/US20150146435A1 ## CPC - F21V 5/045: {the lens having discontinuous faces, e.g. Fresnel lenses} - F21V 7/0091: {using total internal reflection} - F21Y 2115/10: Light-emitting diodes [LED] - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED ## Abstract A lens for forming a predetermined pattern from a light source includes a first region of an inner surface configured to receive light from the light source and to bend the light into a first line segment. The lens includes a second region of the inner surface configured to receive the light from the light source and to bend the light into a second line segment perpendicular to the first line segment, the first line segment forming a cross of a “T” and the second line segment forming the stem of the “T.” ## Claims ### Claim 1 A lens for forming a predetermined pattern from a light source, comprising: a first region of an inner surface configured to receive light from the light source and to bend the light into a first line segment; and a second region of the inner surface configured to receive the light from the light source and to bend the light into a second line segment perpendicular to the first line segment, the first line segment forming a cross of a “T” and the second line segment forming the stem of the “T.” ### Claim 2 (depends on 1) The lens of claim 1, further comprising: an outer surface including a first region and a second region, wherein the first region of the outer surface is configured to accept light from the first region of the inner surface and redistribute the light from the first region of the inner surface along the first line segment to maintain predetermined light intensities at predetermined locations along the first line segment, and the second region of the outer surface is configured to accept light from the second region of the inner surface and redistribute the light from the second region of the inner surface along the second line segment to maintain predetermined light intensities at predetermined locations along the second line segment. ### Claim 3 (depends on 1) The lens of claim 1, wherein the second region of the inner surface is configured to form the second line segment by bending light to travel substantially along a first plane upon leaving the lens, the first region of the inner surface is a convex cross-sectional shape as viewed from a cross-section formed by the first plane, and the second region of the inner surface is a concave cross-sectional shape as viewed from the cross-section formed by the first plane. ### Claim 4 (depends on 1) The lens of claim 1, wherein the first region of the inner surface is configured to form the first line segment by bending light to travel substantially along a second plane upon leaving the lens, and the second region of the inner surface is a convex cross-sectional shape as viewed from a cross-section formed by the second plane. ### Claim 5 (depends on 1) The lens of claim 1, further comprising: a third region of the inner surface recessed in the inner surface; and a fourth region of the inner surface recessed in the inner surface, the third region configured to bend the light to form a first dot of light in a first quadrant formed by the first line segment and the second line segment, and the fourth region configured to bend the light to form a second dot of light in a second quadrant formed by the first line segment and the second line segment, the second quadrant located on an opposite side of the second line segment from the first quadrant. ### Claim 6 (depends on 5) The lens of claim 5, wherein the third region and the fourth region include circularly-shaped Fresnel lenses. ### Claim 7 (depends on 1) The lens of claim 1, further comprising: a fifth region of an outer surface configured to receive light from within the lens and to bend the light to redistribute the light along the first line segment; and a sixth region of the outer surface configured to receive the light from within the lens and to bend the light to redistribute the light along the second line segment. ### Claim 8 (depends on 7) The lens of claim 7, further comprising: a seventh region protruding from the sixth region of the outer surface and an eighth region protruding from the sixth region of the outer surface, the seventh and eighth regions configured to receive light from within the lens and to form the first and second dots of light. ### Claim 9 (depends on 1) The lens of claim 1, wherein the first region comprises a plurality of Fresnel lenses substantially parallel to the first line segment, and the second region comprises a plurality of Fresnel lenses substantially parallel to the second line segment. ### Claim 10 (depends on 9) The lens of claim 9, wherein the first region comprises a substantially semi-cylindrical shape. ### Claim 11 (depends on 9) The lens of claim 9, wherein an outer surface of the lens opposite the second region includes a plurality of Fresnel lenses arranged parallel to the first line segment. ### Claim 12 (depends on 1) The lens of claim 1, further comprising: a reflective surface located on an opposite side of the first region from the second region, the reflective surface configured to reflect light onto the first line segment based on an angle of the reflective surface. ### Claim 13 A lens assembly, comprising: a base board; a light source mounted to the base board; and a lens mounted to the base board and having an inner surface defining a cavity, such that the light source is located in the cavity, the inner surface of the lens having a first region configured to receive light from the light source and to bend the light to form a first line segment, and the inner surface of the lens having a second region configured to receive the light from the light source and to bend the light to form a second line segment perpendicular to the first line segment, such that the first line segment forms a cross of a “T” shape and the second line segment forms a stem of the “T” shape. ### Claim 14 (depends on 13) The lens assembly of claim 13, wherein the light source is a light-emitting diode. ### Claim 15 (depends on 13) The lens assembly of claim 13, wherein the second region is configured to form the second line segment by bending light to travel substantially along a first plane upon leaving the lens, the first region is a convex cross-sectional shape as viewed from a cross-section formed by the first plane, and the second region is a concave cross-sectional shape as viewed from the cross-section formed by the first plane. ### Claim 16 (depends on 13) The lens assembly of claim 13, wherein the first region is configured to form the first line segment by bending light to travel substantially along a second plane upon leaving the lens, and the second region of the inner surface is a convex cross-sectional shape as viewed from a cross-section formed by the second plane. ### Claim 17 (depends on 13) The lens assembly of claim 13, wherein the inner surface of the lens further comprises: a third region comprising a first recess in the inner surface; and a fourth region comprising a second recess in the inner surface, the third region configured to bend the light to form a first dot of light in a first quadrant formed by the first line segment and the second line segment, and the fourth region configured to bend the light to form a second dot of light in a second quadrant formed by the first line segment and the second line segment, the second quadrant located on an opposite side of the second line segment from the first quadrant. ### Claim 18 (depends on 17) The lens assembly of claim 17, wherein the third region and the fourth region include circularly-shaped Fresnel lenses. ### Claim 19 (depends on 13) The lens assembly of claim 13, wherein the first region of the inner surface of the lens comprises a plurality of Fresnel lenses substantially parallel to the first line segment, and the second region of the inner surface of the lens comprises a plurality of Fresnel lenses substantially parallel to the second line segment. ### Claim 20 (depends on 19) The lens assembly of claim 19, wherein the first region of the inner surface of the lens comprises a substantially semi-cylindrical shape.