# US 11,028,997 B2 · Semi-cylindrical illuminator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,997 B2 - Document ID: US11028997B2 - Status: Granted - Kind: B2 - Application number: 16/918,771 - Filed: 2020-07-01 - Published: 2020-10-22 - Granted: 2021-06-08 - Earliest claimed: 2018-06-14 - Assignees: Luminit LLC - Applicants: Luminit LLC - Inventors: Anthony Ang - Web page: https://patentgrep.com/patent/US11028997B2 ## CPC - F21V 13/10: the elements being reflectors and screens - G02B 27/143: {using macroscopically faceted or segmented reflective surfaces} - F21V 7/0033: {with successive reflections from one reflector to the next or following} - F21V 7/0091: {using total internal reflection} - F21V 7/041: {with conical or pyramidal surface} - G01S 7/4814: {of transmitters alone} - G01S 7/4817: {relating to scanning} - G01S 17/42: Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S17/46) - G02B 5/02: Diffusing elements; Afocal elements - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract An illumination system converting light beams into wide-angle light transmissions including i) a cylindrical member having a cone-shaped depression in a distal end; and ii) a semi-circular member having an inner radial surface adjacent to a sidewall of the cylindrical member; and angled upper and lower annular surfaces extending from the cylindrical member and meeting at an outer radial edge. A light beam entering the proximal end of the cylindrical member strikes a first edge of the cone-shaped depression and is reflected out as a first light transmission; or it strikes a second edge of the cone-shaped depression, is reflected against the upper and lower annular surfaces, and exits the cylindrical member as a second light transmission parallel to the first diffused light transmission. At least one light path passes through a diffuser on the cylindrical member. ## Claims ### Claim 1 An illumination system comprising: (a) a cylindrical member comprising a top end, a middle, a bottom end, an inner surface, and an outer surface wherein the top end of the cylindrical member comprises a cone-shaped depression with a tip of the cone extending into an interior portion of the cylindrical member; (b) a diffuser comprising a surface relief pattern on the cylindrical member or comprising a separate diffuser attachment that is adhered to the outer surface of the cylindrical member; and (c) a semicircular member comprising an inner surface and an outer surface wherein the inner surface of the semicircular member encircles a portion of the outer surface of the cylindrical member and wherein the outer surface of the semicircular member comprises an upper angular surface and a lower angular surface that meet at an equatorial ridge. ### Claim 2 (depends on 1) The illumination system of claim 1 wherein the cylindrical member comprises a round or oval outline in a cross-section formed by a plane perpendicular to a longitudinal axis of the cylindrical member. ### Claim 3 (depends on 1) The illumination system of claim 1 wherein the bottom end of the cylindrical member comprises a Fresnel lens or a classical lens to collimate a light beam entering the cylinder. ### Claim 4 (depends on 1) The illumination system of claim 1 wherein the cylindrical member and the semicircular member comprise a material comprising a polymer, a glass, a ceramic, or a mixture thereof. ### Claim 5 (depends on 1) The illumination system of claim 1 wherein the cylindrical member and the semicircular member comprise a polymer comprising acrylic, polycarbonate, cyclic olefin copolymer, polyethylene, polyethylene terephthalate, polyurethane, or a mixture thereof. ### Claim 6 (depends on 1) The illumination system of claim 1 wherein the cylindrical member and the semicircular member comprise a material having an index of refraction greater than about 1.41. ### Claim 7 (depends on 1) The illumination system of claim 1 wherein the cylindrical member and the semicircular member comprise separate components or comprise a unitary structure. ### Claim 8 (depends on 1) The illumination system of claim 1 wherein the diffuser comprises a holographic diffuser or a flat top diffuser. ### Claim 9 (depends on 1) The illumination system of claim 1 wherein the diffuser comprises a holographic diffuser comprising an elliptical diffuser. ### Claim 10 (depends on 1) The illumination system of claim 1 wherein the cone-shaped depression comprises a right circular cone. ### Claim 11 (depends on 1) The illumination system of claim 1 wherein the cone-shaped depression comprises a sloped surface sloping between 10-80° from the top end of the cylindrical member. ### Claim 12 (depends on 1) The illumination system of claim 1 wherein the outer surface of the semicircular member comprises an upper angular surface comprising a sloped surface sloping between 45-135° from the top end of the cylindrical member and a lower angular surface comprising a sloped surface sloping between 45-135° from the bottom end of the cylindrical member wherein the upper angular surface and the lower angular surface meet at an equatorial ridge forming an angle between 60-120°. ### Claim 13 (depends on 1) The illumination system of claim 1 wherein the outer surface of the semicircular member comprises an upper angular surface and a lower angular surface wherein the angled surfaces comprise flat surfaces, curved surfaces, or irregular surfaces. ### Claim 14 (depends on 1) The illumination system of claim 1 wherein the cylindrical member and the semicircular member comprise heights that are similar. ### Claim 15 (depends on 1) The illumination system of claim 1 wherein the semicircular member encircles about half of the cylindrical member. ### Claim 16 (depends on 1) The illumination system of claim 1 wherein the cylindrical member and the semicircular member comprise a hollow interior or a solid interior. ### Claim 17 (depends on 1) The illumination system of claim 1 wherein the diffuser provides a vertical angle in the range of 0-35° to light exiting the illumination system. ### Claim 18 (depends on 1) The illumination system of claim 1 further comprising a film or coating. ### Claim 19 (depends on 1) The illumination system of claim 1 further comprising a film or coating comprising an anti-reflection coating, a hardness coating, a bandpass filter, a wavelength filter, a scratch-resistant coating, an oxide, or a mixture thereof. ### Claim 20 (depends on 1) The illumination system of claim 1 configured to rotate with or without a rotating light source to create a scanning device.