# US 10,119,667 B1 · Light-redirecting optical daylighting system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,119,667 B1 - Document ID: US10119667B1 - Status: Granted - Kind: B1 - Application number: 15/993,193 - Filed: 2018-05-30 - Granted: 2018-11-06 - Earliest claimed: 2017-11-22 - Assignees: LightLouver LLC - Applicants: LightLouver LLC - Inventors: Zachary L. Rogers; Michael J Holtz - Web page: https://patentgrep.com/patent/US10119667B1 ## CPC - F21S 11/007: {characterised by the means for transmitting light into the interior of a building} - E06B 9/24: Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; {Slat blinds}(operating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00) - F21S 11/002: {characterised by the means for collecting or concentrating the sunlight, e.g. parabolic reflectors or Fresnel lenses} - E06B 2009/2417: {Light path control; means to control reflection} - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00) ## Abstract Light-redirecting optical system for building fenestrations, such as glass doors and windows, storefront glazing systems, and curtain walls, that can collect and redirect daylight into the interior of a building. The light-redirecting optical system includes an outward-facing light-redirecting optical surface and an inward-facing light-redirecting surface. The outward-facing light-redirecting optical surface collects and redirects daylight mostly upward toward the inward-facing light-redirecting surface. The inward-facing light-redirecting surface receives the redirected daylight and further redirects it into the interior environment at pre-determined angles; so that all specular rays of light are at or above the horizon for a wide range of incident angles of daylight striking the outward-facing light-redirecting optical surface. The light-redirecting optical surfaces can be fabricated on a film or flexible substrate that may be directly applied to glass, acrylic, or other glazing surfaces. Alternatively, the light-redirecting optical surfaces may be fabricated directly on the glazing surfaces. ## Claims ### Claim 1 A light-redirecting optical system for a vertical glazing, including: an outward-facing light-redirecting optical surface including a collection optic; the collection optic includes a series of projections projecting into an exterior environment; a projection of the series of projections includes an upward-facing portion that includes a translucent portion projecting acutely away from the vertical glazing and a transparent portion projecting directly away from the translucent portion; and the series of projections are shaped and positioned so that the series of projections mitigates an incident angle modifier effect of the vertical glazing by redirection and diffusion of specular rays into an interior environment. ### Claim 2 (depends on 1) The light-redirecting optical system of claim 1, wherein: the transparent portion projects from the translucent portion at an oblique angle. ### Claim 3 (depends on 1) The light-redirecting optical system of claim 1, wherein: the transparent portion is planar with the translucent portion. ### Claim 4 (depends on 1) The light-redirecting optical system of claim 1 wherein: the projection includes an arcuate shaped portion facing convexly downward and extending at an acute angle inwardly away from a vertex of the transparent portion. ### Claim 5 (depends on 4) The light-redirecting optical system of claim 4, wherein: the arcuate shaped portion so positioned with respect to the transparent portion that specular light passing through the transparent portion and striking an interior surface of the arcuate shaped portion reflects off the interior surface by total internal reflection. ### Claim 6 (depends on 1) The light-redirecting optical system of claim 1, further including: a light-redirecting optical film including the collection optic as a microstructure. ### Claim 7 A light-redirecting optical system for a vertical glazing, including: an outward-facing light-redirecting optical surface including a collection optic; the collection optic includes a series of projections projecting into an exterior environment; a projection of the series of projections includes an arcuate shaped portion, a transparent portion, and a translucent portion that are so shaped and positioned that specular light passing through the transparent portion and striking an interior surface of the arcuate shaped portion reflects off the interior surface by total internal reflection; and the series of projections are shaped and positioned so that the series of projections mitigates an incident angle modifier effect of the vertical glazing by redirection and diffusion of specular rays into an interior environment. ### Claim 8 (depends on 7) The light-redirecting optical system of claim 7, wherein: the arcuate shaped portion is convexly downward. ### Claim 9 (depends on 8) The light-redirecting optical system of claim 8, wherein: the transparent portion and the translucent portion are each planar. ### Claim 10 A light-redirecting optical system for a vertical glazing, including: an outward-facing light-redirecting optical surface including a collection optic positioned on an exterior surface of the vertical glazing; the collection optic includes a series of projections projecting into an exterior environment and stationary with respect to the vertical glazing; a projection of the series of projections includes an upward-facing portion that includes a translucent portion projecting acutely away from the vertical glazing and a transparent portion projecting directly away from the translucent portion; and the series of projections are shaped and positioned so that the collection optic mitigates an incident angle modifier effect of the vertical glazing by redirection and diffusion of specular rays into an interior environment. ### Claim 11 (depends on 10) The light-redirecting optical system of claim 10, wherein: the transparent portion projects from the translucent portion at an oblique angle. ### Claim 12 (depends on 10) The light-redirecting optical system of claim 10, wherein: the transparent portion is planar with the translucent portion. ### Claim 13 (depends on 10) The light-redirecting optical system of claim 10 wherein: the projection includes an arcuate shaped portion facing convexly downward and extending at an acute angle inwardly away from a vertex of the transparent portion. ### Claim 14 (depends on 13) The light-redirecting optical system of claim 13, wherein: the arcuate shaped portion so positioned with respect to the transparent portion that specular light passing through the transparent portion and striking an interior surface of the arcuate shaped portion reflects off the interior surface by total internal reflection. ### Claim 15 (depends on 10) The light-redirecting optical system of claim 10, wherein: the projection includes an arcuate shaped portion facing convexly downward. ### Claim 16 (depends on 15) The light-redirecting optical system of claim 15, wherein: the transparent portion and the translucent portion are each planar. ### Claim 17 (depends on 10) The light-redirecting optical system of claim 10, further including: a light-redirecting optical film including the collection optic as a microstructure.