Light filter
First Claim
Patent Images
1. A light filter, comprising:
- exactly one partially reflective layer having a top and a bottom and a wedge-shaped profile defining a wedge direction;
a first transparent layer, disposed atop the partially reflective layer, comprising at least three dielectric layers of two different materials, each dielectric layer having a wedge-shaped profile oriented in the wedge direction;
a second transparent layer, disposed on the bottom of the partially reflective layer, comprising at least three dielectric layers of two different materials, each dielectric layer having a wedge-shaped profile oriented in the wedge direction.
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Accused Products
Abstract
Various embodiments of a light filter are disclosed.
23 Citations
20 Claims
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1. A light filter, comprising:
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exactly one partially reflective layer having a top and a bottom and a wedge-shaped profile defining a wedge direction; a first transparent layer, disposed atop the partially reflective layer, comprising at least three dielectric layers of two different materials, each dielectric layer having a wedge-shaped profile oriented in the wedge direction; a second transparent layer, disposed on the bottom of the partially reflective layer, comprising at least three dielectric layers of two different materials, each dielectric layer having a wedge-shaped profile oriented in the wedge direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A light filter, comprising:
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exactly one partially reflective layer having a top and a bottom and a wedge-shaped profile defining a wedge direction; a first transparent layer, disposed on top of the partially reflective layer, comprising at least two dielectric layers of differing materials, each dielectric layer having a wedge-shaped profile oriented in the wedge direction; and a second transparent layer, disposed on the bottom of the partially reflective layer, comprising at least two dielectric layers of differing materials, each dielectric layer having a wedge-shaped profile oriented in the wedge direction. - View Dependent Claims (12, 13, 14, 15)
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16. A photospectrometer, comprising:
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a substrate; a plurality of photodiodes disposed upon the substrate, each photodiode being electrically coupled to sensing circuitry for receiving a signal representative of light intensity sensed by the respective photodiode; and a light filter disposed over the photodiodes, comprising exactly one partially reflective layer having a top and a bottom and a wedge-shaped profile defining a wedge direction; a first transparent layer, disposed on top of the partially reflective layer, comprising at least three dielectric layers of two differing materials, each dielectric layer having a wedge-shaped profile oriented in the wedge direction; a second transparent layer, disposed on the bottom of the partially reflective layer, comprising at least three dielectric layers of two differing materials, each dielectric layer having a wedge-shaped profile oriented in the wedge direction. - View Dependent Claims (17, 18, 19, 20)
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Specification