Patent ID: 9086318
Filing Date: 2015-07-21
Classification: G01J,H04N

Abstract:
1. A computing device, comprising: at least one processor; a light source; a camera; a cover sheet that includes a light filtering feature, the light filtering feature including a scattering pattern, wherein the scattering pattern includes at least one diffraction pattern formed at a predetermined angle relative to a light source, and wherein a first diffraction pattern includes a first set of diffraction features at a first angle and a second diffraction pattern includes a second set of diffraction features at a second angle, the second angle different from the first angle; and a memory device including instructions that, when executed by the at least one processor, cause the light source to emit light in a first direction through the cover sheet, the instructions when executed further causing the camera to detect a subset of the light transmitted in a second direction through the cover sheet, wherein the second direction is substantially opposite to the first direction, wherein the light source and the camera are positioned on a same side of the cover sheet, and wherein the scattering pattern is positioned to scatter the subset of the light reflected by the cover sheet in the second direction toward the camera, to reduce an amount of the subset of the light detected by the camera.