Virtual reality system with an optical position-sensing facility
First Claim
1. A virtual reality system permanently connected with a device to be worn by a user, comprising:
- an optical position-sensing facility which comprises at least one radiation source defining a fixed reference point in space;
an optical receiving system permanently connected with said device, said optical receiving system comprising at least a first radiation detector, a second radiation detector and a third radiation detector, whose optical axes, a first optical axis, a second optical axis, and a third optical axis respectively, are parallel to each other and, in a basic position, point at the at least one radiation source;
the first radiation detector, has a reception pattern which has, in a first plane defined by the first optical axis, and by a first direction determined by the optical receiving system in a first angular range including the first optical axis, a rising/falling sensitivity characteristic which is essentially monotonic;
the second radiation detector has a reception pattern which has, in a second plane defined by the second optical axis and by a second direction determined by the optical receiving system, in a second angular range including the second optical axis, a rising/falling sensitivity characteristic which is essentially monotonic; and
the third radiation detector has a uniform reception pattern which has, within at least the first and second angular ranges, a sensitivity characteristic which varies slowly in comparison with the sensitivity characteristic of the first or second radiation detector.
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Accused Products
Abstract
A virtual reality system permanently connected with a device to be worn by a user is disclosed which has an optical position-sensing facility that contains at least one radiation source defining a fixed reference point in space and an optical receiving system permanently connected with the device. The optical receiving system includes three radiation detectors, whose optical axes are parallel to each other. The first radiation detector has a reception pattern which shows a rising/falling sensitivity characteristic in a first angular range. The second radiation detector has a reception pattern which shows a rising/falling sensitivity characteristic in a second angular range. The third radiation detector has a reception pattern which shows a slowly varying sensitivity characteristic within at least the first and second angular ranges.
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Citations
25 Claims
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1. A virtual reality system permanently connected with a device to be worn by a user, comprising:
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an optical position-sensing facility which comprises at least one radiation source defining a fixed reference point in space; an optical receiving system permanently connected with said device, said optical receiving system comprising at least a first radiation detector, a second radiation detector and a third radiation detector, whose optical axes, a first optical axis, a second optical axis, and a third optical axis respectively, are parallel to each other and, in a basic position, point at the at least one radiation source; the first radiation detector, has a reception pattern which has, in a first plane defined by the first optical axis, and by a first direction determined by the optical receiving system in a first angular range including the first optical axis, a rising/falling sensitivity characteristic which is essentially monotonic; the second radiation detector has a reception pattern which has, in a second plane defined by the second optical axis and by a second direction determined by the optical receiving system, in a second angular range including the second optical axis, a rising/falling sensitivity characteristic which is essentially monotonic; and the third radiation detector has a uniform reception pattern which has, within at least the first and second angular ranges, a sensitivity characteristic which varies slowly in comparison with the sensitivity characteristic of the first or second radiation detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A virtual reality system permanently connected with a device to be worn by a user, comprising:
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an optical position-sensing facility which comprises at least one radiation detector defining a fixed reference point in space; at least one optical transmitting system permanently connected with said device, said optical transmitting system comprising at least a first radiation source, a second radiation source, and a third radiation source whose optical axes, a first optical axis, a second optical axis, and a third optical axis respectively, are parallel to each other and, in a basic position, point at the at least one radiation detector; the first radiation source has an intensity pattern which has, in a first plane defined by the first optical axis, and by a first direction determined by the optical transmitting system, in a first angular range including the first optical axis, a rising/falling sensitivity characteristic which is essentially monotonic; the second radiation source has an intensity pattern which has, in a second plane defined by the second optical axis and by a second direction determined by the optical transmitting system, in a second angular range including the second optical axis, a rising/falling intensity characteristic which is essentially monotonic; and the third radiation source has a uniform intensity pattern which has, at least within the first and second angular ranges, an intensity characteristic which varies slowly in comparison with the intensity characteristic of the first or second radiation source. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. In a position dependent virtual reality system permanently connected with a device worn by a user, a position sensing system comprising:
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at least one radiation source defining a fixed reference point in space; and an optical receiving system coupled with said device, said optical receiving system comprising at least a first radiation detector, a second radiation detector and a third radiation detector, whose optical axes, a first optical axis, a second optical axis, and a third optical axis, respectively, are parallel to each other and, in a basic position, point at the at least one radiation source. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification