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US 9,429,781 B2Granted
Filter for selective transmission of visible rays and infrared rays using an electrical signal
AssigneesSamsung Electronics Co., Ltd., Ghent University
InventorsSeong Jin Kim, Do Kyoon Kim, Kee Chang Lee, Jeroen Beeckman, Albert Theuwissen
Life of this patent
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Abstract
Disclosed is a filter for selective transmission of visible rays and infrared rays using an electrical signal. The filter comprises: a first filter for controlling the degree of absorption of visible rays by changing the molecular arrangement in accordance with the control of the electrical signal; and a second filter for controlling the degree of reflection of infrared rays by changing reflectivity in accordance with the control of the electrical signal.
Claims19
A tunable filter, comprising:
- a first filter configured to control a degree of absorption of a visible ray by changing a molecular array, based on a control of an electrical signal;
- and
- a second filter configured to control a degree of reflection of an infrared (IR) ray by changing a reflectivity, based on the control of the electrical signal,
- wherein the first filter is configured by a first layer and a second layer each including an LC molecule and a dye molecule, and
- the molecules included in the first layer and the molecules included in the second layer are disposed vertically to an optical axis of a visible ray.
2 more elements
A camera, comprising:
- a first filter configured to absorb a visible ray based on a control of an electrical signal;
- a second filter configured to reflect an infrared (IR) ray based on a control of the electrical signal;
- and
- a sensor configured to sense at least one of a color image and a depth image,
- wherein when sensing the color image, the first filter and the second filter are configured to transmit the visible ray and the second filter is further configured to reflect the IR ray, and
- wherein when sensing the depth image, the first filter and the second filter are configured to transmit the IR ray and the first filter is further configured to absorb the visible ray.
3 more elements
A filter, comprising:
- a first filter configured to absorb a visible ray by controlling an electrical signal;
- and
- a second filter configured to reflect an infrared (IR) ray by controlling the electrical signal,
- wherein the second filter is configured to
- set a refractive index of a layer including an LC molecule to differ from a refractive index of a layer including a polymer molecule such that the IR ray is reflected to the second filter when turned OFF by the electrical signal, and
- set a refractive index of a layer including an LC molecule to be identical to a refractive index of a layer including a polymer molecule such that the IR ray is transmitted to the second filter when turned ON by the electrical signal.
3 more elements
Dependencies are inferred from the claim text.