# US 2018/0320850 A1 · High Efficiency Daylighting Structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0320850 A1 - Document ID: US20180320850A1 - Status: Published application - Kind: A1 - Application number: 15/798,768 - Filed: 2017-10-31 - Published: 2018-11-08 - Earliest claimed: 2014-08-19 - Assignees: SerraLux Inc. - Applicants: SerraLux Inc. - Inventors: MARK E. GARDINER - Web page: https://patentgrep.com/patent/US20180320850A1 ## 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) - E06B 9/266: Devices or accessories for making or mounting lamellar blinds or parts thereof {(cleaning of lamellar blinds A47L4/00; joining plastics plates for making venetian blinds B29C66/437)} - E06B 9/386: Details of lamellae - G02B 19/0028: {refractive and reflective surfaces, e.g. non-imaging catadioptric systems} - G02B 19/0042: {for use with direct solar radiation} - 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) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A high efficiency daylight directing structure for application on fenestration deploys closely spaced macroscopic bars of transparent resin to eliminate different forms of glare. The spaced apart surfaces provide for efficient reflection of selective incident light, by TIR or metallic surfaces, via the ultra-smooth native surfaces from a mold or casting process. A close spacing is readily obtained in various attachment methods to boost efficiency. The fabrication method allows selective deposition of absorbing layers, such as by of painting/printing between alternating native optical surface to provide one way transparency at high angles of incidence. The bars are supported on at least one common planar surface by transparent support member with an optical quality adhesive material filling any imperfection in the bars common planar surface that form in fabrication. ## Claims ### Claim 1 A daylighting structure comprising: a) plurality of transparent solid polymeric bars having opposing native optical quality surfaces oriented in a vertical plane, each bar separated from the native surface of the adjacent bar by a gap, b) a first transparent planar support member connecting common surfaces on a first side of the bars that is orthogonal to the native optical quality surface, c) an adhesive material interposed between and connecting the common surfaces of the polymeric bars and the planar support member, in which the adhesive material fills optical imperfections of the first side of the bars that is connected to the transparent planar support member. ### Claim 2 (depends on 2) The daylighting structure according to claim 2 in which the adhesive material fills optical imperfections of the first side of the bars that is connected to the transparent planar support member. ### Claim 3 (depends on 2) The daylighting structure according to claim 2 wherein said bars are parallelograms. ### Claim 4 (depends on 2) The daylighting structure according to claim 2 further comprising a second transparent planar member connected to the polymeric bars on the opposite side of the first transparent planar member. ### Claim 5 (depends on 2) The daylighting structure according to claim 2 wherein one of the opposing optical surfaces of each bar has an absorbing coating. ### Claim 6 (depends on 4) The daylighting structure according to claim 4 wherein the absorbing coating has spaced apart peaks that contact the native optical surface of the adjacent bars. ### Claim 7 (depends on 1) The daylighting structure of claim 1 where the gaps between adjacent bars have a pitch of at least about 0.5 mm. ### Claim 8 A slat for assembly into a louver assembly for variable light re-direction, the slat having an aspect ratio of at least about 6 and a plurality of spaced apart reflective surfaces with a pitch of at least about 500 microns. ### Claim 9 (depends on 16) The slat for assembly into a louver assembly for variable light re-direction according to claim 16 wherein the reflective surface are TIR surfaces. ### Claim 10 (depends on 17) The slat for assembly into a louver assembly for variable light re-direction according to claim 17 wherein the reflective surface have an aspect ratio of the pitch of the reflective surface to the height of the reflective surface of at least about 1.5. ### Claim 11 (depends on 16) The slat for assembly into a louver assembly for variable light re-direction according to claim 16 and in which the edges of the reflective surfaces have a radius of curvature of less than about 2% of the pitch spaced apart reflective surfaces. ### Claim 12 (depends on 16) The slat for assembly into a louver assembly for variable light re-direction according to claim 16 in which the spaced apart reflective surfaces are parallel to each other. ### Claim 13 (depends on 16) The slat for assembly into a louver assembly for variable light re-direction according to claim 16 and in which the adjacent spaced apart reflective surfaces have at least one of a triangular shape, a symmetric V-shape and an asymmetric V-shape. ### Claim 14 (depends on 21) The slat for assembly into a louver assembly for variable light re-direction according to claim 21 wherein the slat has see-through visibility and the reflective surface are TIR surfaces. ### Claim 15 (depends on 16) The slat for assembly into a louver assembly for variable light re-direction according to claim 16 the slat having an aspect ratio of at least about 12. ### Claim 16 (depends on 23) The slat for assembly into a louver assembly for variable light re-direction according to claim 23 the slat having an aspect ratio of at least about 24.