Patent ID: 9348463
Filing Date: 2016-05-24
CPC Classification: G06F

Claim Text:
1. A detection apparatus comprising: a first light source which produces light; a multilocation sensor having an aperture; and a sheet which receives light from the first light source, the sheet in communication with the multilocation sensor, which when a plurality of locations of the sheet are simultaneously activated by an object touching the sheet, the sensor senses these locations based on retroreflection of the light, simultaneously, the sheet includes a first lenslet array, a surface of the sheet is at a focal length of each lenticular lens of the first lenslet array, the first lenslet array is placed so that the first lenslet array's ridged side is facing toward the multilocation sensor and the first lenslet array's smooth side is facing away from the multilocation sensor, the smooth side forms the sheet's surface, the first light source is placed such that a line in space between the first light source and the aperture of the multilocation sensor is parallel to a line in space formed by each individual lenticular lenslet of the first lenslet array, light that arrives at the sheet from any direction is focused by each lenticular lens into a thin bright line of light upon the smooth side of the lenticular lens array so that light is concentrated into thin bright parallel stripes of light upon the smooth side of the sheet, when the light contacts the object touching the surface, the light is collimated retroreflected directly back toward the source.