Patent ID: 11946814
Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
Field: Optics (Instruments)
Classification: CPC G  E | IPC E  F  G

Claim 15:
16. A method for determining a temperature of an external environment of a window on one of a first side and a second side of the window, the second side being substantially parallel to the first side, and the window including a first optical grating operatively positioned on the first side and used to determine a temperature of an external environment of the first side, a second optical grating operatively positioned on the second side and used to determine a temperature of an external environment of the second side, a first light source operatively positioned on the first side and configured to emit light toward the first optical grating, a first detector operatively positioned to detect one or more wavelengths of the light after it has interacted with the first optical grating, a second light source operatively positioned on the second side and configured to emit light toward the second optical grating, a second detector operatively positioned to detect one or more wavelengths of the light after it has interacted with the second optical grating, the method comprising:
determining, using at least one of the first optical grating and the second optical grating, the temperature of the external environment of the window on one of the first side and the second side.