US Patent 12092529 Window-based object detection and/or identification

A window can be used for object detection and/or identification. The window can have a first side and a second side. An optical grating can be operatively positioned with respect to the first side of the window. A light source can be configured to emit light toward the optical grating. A detector can be operatively positioned to acquire spectroscopic data of the light emitted from the light source after the light has interacted with the optical grating. Using the optical grating, a temperature at or near the first side can be determined. Based on the temperature, it can be determined whether an object is located on the first side of the window.