Method and system for sensing light using interferometric elements
First Claim
1. A light sensor having at least one interferometric element, the interferometric element comprising:
- a first surface being partially transmissive and partially reflective to at least one wavelength of light;
a second surface substantially parallel to the first surface and spaced a first distance from the first surface in a direction substantially perpendicular to the first surface for reflecting at least a portion of the at least one wavelength of light; and
a temperature sensor responsive to changes of temperature of at least a portion of the first surface caused at least in part by absorption of the at least one wavelength of light.
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Accused Products
Abstract
Certain embodiments of the invention provide a light sensor comprising at least one interferometric element that absorbs light in at least one wavelength. The interferometric element comprises a first surface and a second surface substantially parallel to the first surface. The second surface is spaced a gap distance from the first surface in a direction substantially perpendicular to the first surface. The light wavelength absorbed is dependent on the gap distance. The interferometric element further comprises a temperature sensor. The temperature sensor is responsive to changes in temperature of at least a portion of the interferometric element due to absorption of light by the interferometric element.
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Citations
25 Claims
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1. A light sensor having at least one interferometric element, the interferometric element comprising:
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a first surface being partially transmissive and partially reflective to at least one wavelength of light;
a second surface substantially parallel to the first surface and spaced a first distance from the first surface in a direction substantially perpendicular to the first surface for reflecting at least a portion of the at least one wavelength of light; and
a temperature sensor responsive to changes of temperature of at least a portion of the first surface caused at least in part by absorption of the at least one wavelength of light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for sensing light comprising:
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providing a first surface being partially transmissive and partially reflective to at least one wavelength of light;
providing a second surface substantially parallel to the first surface and spaced a gap distance from the first surface in a direction substantially perpendicular to the first surface for reflecting at least a portion of the at least one wavelength of light;
absorbing the at least one wavelength of light on the first surface; and
sensing a change of temperature of at least a portion of the first surface.
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18. A camera having a light sensor, the camera comprising:
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a housing; and
an interferometric element within the housing, the interferometric element comprising;
a first surface being partially transmissive and partially reflective to at least one wavelength of light, a second surface substantially parallel to the first surface and spaced a first distance from the first surface in a direction substantially perpendicular to the first surface for reflecting at least a portion of the at least one wavelength of light, and a temperature sensor responsive to changes of temperature of at least a portion of the first surface caused at least in part by absorption of the at least one wavelength of light. - View Dependent Claims (19, 20, 21, 22)
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23. A display device having a light sensor, the display device comprising:
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a housing; and
an interferometric element within the housing, the interferometric element comprising;
a first surface being partially transmissive and partially reflective to at least one wavelength of light, a second surface substantially parallel to the first surface and spaced a first distance from the first surface in a direction substantially perpendicular to the first surface for reflecting at least a portion of the at least one wavelength of light, and a temperature sensor responsive to a change of temperature of at least a portion of the first surface caused at least in part by absorption of the at least one wavelength of light. - View Dependent Claims (24, 25)
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Specification