# US 11,305,826 B2 · Mobile body having reflection control layer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,305,826 B2 - Document ID: US11305826B2 - Status: Granted - Kind: B2 - Application number: 16/638,284 - Filed: 2017-08-14 - Published: 2020-06-11 - Granted: 2022-04-19 - Earliest claimed: 2017-08-14 - Assignees: Nissan Motor Co., Ltd. - Applicants: Nissan Motor Co., Ltd. - Inventors: Yuichi Sato - Web page: https://patentgrep.com/patent/US11305826B2 ## CPC - B62D 35/00: Vehicle bodies characterised by streamlining - B62D 25/00: Superstructure {or monocoque structure} sub-units; Parts or details thereof not otherwise provided for {(having impact absorbing means B62D21/15; running-boards, steps, or the like as superstructure sub-unit B60R3/00)} - B62D 29/00: Superstructures, {understructures, or sub-units thereof,} characterised by the material thereof {(B62D33/044, B62D33/048 take precedence)} - G02B 5/282: {reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection} - Y02T 30/00: Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A mobile body has a reflection control layer that reflects light in a wavelength region of sunlight or in a wavelength region of infrared radiation formed on a surface thereof. A mainstream outside the mobile body is heated by the reflected light to reduce air resistance of the mobile body. A refractive index of the reflection control layer is a value outside a range between a refractive index of a body-side substance and a refractive index of air. A thickness of the reflection control layer is equal to or larger than a value obtained by dividing 187.5 nanometers by a refractive index of the reflection control layer, and equal to or smaller than a value obtained by dividing 275,000 nanometers by a refractive index of the reflection control layer. ## Claims ### Claim 1 A mobile body having a reflection control layer that reflects light in a wavelength region of sunlight or a wavelength region of infrared radiation formed on a surface of the mobile body, wherein in a wavelength region from 0.75 micrometer to 100 micrometers, a refractive index of the reflection control layer is a value outside a range between a refractive index of a body-side substance under the reflection control layer and a refractive index of air, and a thickness of the reflection control layer is equal to or larger than a value obtained by dividing 187.5 nanometers by the refractive index of the reflection control layer, and equal to or smaller than a value obtained by dividing 275,000 nanometers by the refractive index of the reflection control layer. ### Claim 2 (depends on 1) The mobile body according to claim 1, wherein in the wavelength region from 0.75 micrometer to 100 micrometers, the refractive index of the reflection control layer is larger than both the refractive index of the body-side substance and a refractive index of air. ### Claim 3 (depends on 2) The mobile body according to claim 2, wherein in the wavelength region from 0.75 micrometer to 100 micrometers, the refractive index of the reflection control layer is equal to or larger than 1.01 times the refractive index of the body-side substance and equal to or larger than 1.01 times the refractive index of the air. ### Claim 4 (depends on 2) The mobile body according to claim 2, wherein the thickness of the reflection control layer is increased, as an inclination angle from horizontal of the surface increases. ### Claim 5 (depends on 2) The mobile body according to claim 2, wherein a reflection prevention layer is laminated on a surface of the reflection control layer, and in a visible light region from 0.38 micrometer to 0.75 micrometer, a refractive index of the reflection prevention layer is equal to a geometric mean of the refractive index of the reflection control layer and the refractive index of the air, and a thickness of the reflection prevention layer is equal to or larger than a value obtained by dividing 95 nanometers by the refractive index of the reflection prevention layer, and equal to or smaller than a value obtained by dividing 230100 nanometers by the refractive index of the reflection prevention layer. ### Claim 6 (depends on 5) The mobile body according to claim 5, wherein in the visible light region from 0.38 micrometer to 0.75 micrometer, the refractive index of the reflection prevention layer is from 0.34 to 2.40 inclusive. ### Claim 7 (depends on 1) The mobile body according to claim 1, wherein in the wavelength region from 0.75 micrometer to 100 micrometers, the refractive index of the reflection control layer is smaller than both the refractive index of the body-side substance and the refractive index of air. ### Claim 8 (depends on 7) The mobile body according to claim 7, wherein in the wavelength region from 0.75 micrometer to 100 micrometers, the refractive index of the reflection control layer is equal to or smaller than 0.99 time the refractive index of the body-side substance and equal to or smaller than 0.99 time the refractive index of the air. ### Claim 9 (depends on 1) The mobile body according to claim 1, wherein the reflection control layer is formed on a paint layer on the surface of the mobile body.