Optical position sensing system and optical position sensor assembly with convex imaging window
First Claim
1. An optical position sensor assembly, comprising:
- a body having a front face and a rear face and an opening therethrough;
a lens holder having a first side and a second side, wherein the first side comprises an imaging window having an inside face that is shaped to form a shallow convex surface, wherein the second side holds a single element aspherical lens, and wherein the lens holder is mounted to the front face of the body such that the lens is aligned with the opening;
an optical sensor mounted to the rear face of the body and positioned such that it is aligned with the opening; and
a radiation source positioned within the body above the lens holder and behind an illumination window.
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Accused Products
Abstract
An optical position sensing system includes a bezel surrounding a display, a position sensor assembly, and a processor for calculating touch locations. Prismatic film may be applied to the bezel. Each optical position sensor assembly includes a body. A lens holder holds an imaging window on a first side and a single element aspherical lens on a second side. The imaging window has an inside face shaped to form a shallow convex surface. The lens holder is mounted to a front face of the body such that the lens is aligned with an opening in the body. An optical sensor is mounted to a rear face of the body and aligned with the opening. A radiation source is positioned within the body above the lens holder and behind an illumination window. A light path separator is positioned between the illumination window and the imaging window.
540 Citations
32 Claims
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1. An optical position sensor assembly, comprising:
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a body having a front face and a rear face and an opening therethrough; a lens holder having a first side and a second side, wherein the first side comprises an imaging window having an inside face that is shaped to form a shallow convex surface, wherein the second side holds a single element aspherical lens, and wherein the lens holder is mounted to the front face of the body such that the lens is aligned with the opening; an optical sensor mounted to the rear face of the body and positioned such that it is aligned with the opening; and a radiation source positioned within the body above the lens holder and behind an illumination window. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An optical position sensing system, comprising:
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a display; a bezel surrounding the display; at least one position sensor assembly for emitting radiation to cause illumination of the bezel and for generating data signals representing detected variations in said illumination; a processor for processing said data signals to calculate a location of a touch relative to the display; and wherein each optical position sensor assembly comprises; a body having a front face and a rear face and an opening therethrough, a lens holder having a first side and a second side, wherein the first side comprises an imaging window having an inside face that is shaped to form a shallow convex surface and the second side holds a single element aspherical lens, and wherein the lens holder is mounted to the front face of the body such that the lens is aligned with the opening, an optical sensor mounted to the rear face of the body and positioned such that it is aligned with the opening, and a radiation source positioned within the body above the lens holder and behind an illumination window. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification