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AssigneeZetta Research and Development LLC—Rpo Series
InventorsRobert Bruce Charters, Dax Kukulj, Warwick Todd Holloway, Duncan Ian Ross, Graham Roy Atkins
Estimating the term…
We present optical systems suitable for focusing two substantially collimated beams or sheets of light propagating in different directions onto a common focal point. In some embodiments the optical systems comprise separate focusing elements for each beam or sheet of light, while in other embodiments the optical systems comprise a focusing element and a redirection element. The optical systems have particular application in the receive optics of infrared touch screens, where they enable the detection of additional light paths that assist in the determination of two or more simultaneous touch events.
An optical system comprising a focusing element and a redirection element, wherein said focusing element and said redirection element in combination are adapted to focus a first set of substantially collimated light paths propagating in a first direction onto a common focal point, and wherein said focusing element is adapted to focus a second set of substantially collimated light paths propagating in a second direction, different from said first direction, onto said common focal point.
An optical system according to any one of the previous claims, further comprising a second redirection element, wherein said focusing element and said second redirection element in combination are adapted to focus said second set of light paths onto said common focal point.
An optical system comprising a first focusing element and a second focusing element in unitary form, wherein said first focusing element is adapted to focus a first set of substantially collimated light paths propagating in a first direction onto a common focal point, and wherein said second focusing element is adapted to focus a second set of substantially collimated light paths propagating in a second direction, different from said first direction, onto said common focal point.
21-64. (canceled)
Dependencies are inferred from the claim text.