Electro-Optical Filter
First Claim
1. An electro-optical filter for filtering light from an object, the filter being arranged for receiving the light via a first imaging element and comprising:
- a plurality of reflective elements for receiving and reflecting the light, each reflective element having an optical property; and
a plurality of optical elements, each optical element being positioned at or near a respective reflective element for receiving the light form the same incident light pathway as the respective reflective element, each optical element being arranged to control the optical property of the respective reflective element as a function of an intensity of the received light;
wherein the optical property controls local filtering of the light intensity in a manner such that, above a predetermined intensity threshold, the filter reduces intensity differences of light originating from bright and dark regions of the object.
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Accused Products
Abstract
The present invention provides an electro-optical filter for filtering light from an object. The filter is arranged for receiving the light via a first imaging element and comprises a plurality of reflective elements for receiving and reflecting the light. Each reflective element has an optical property that is dependent on an intensity of the light at or near the reflective element. The optical property controls local filtering of the light intensity in a manner such that, above a predetermined intensity threshold, the filter reduces intensity differences of light originating from bright and dark regions of the object.
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Citations
18 Claims
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1. An electro-optical filter for filtering light from an object, the filter being arranged for receiving the light via a first imaging element and comprising:
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a plurality of reflective elements for receiving and reflecting the light, each reflective element having an optical property; and a plurality of optical elements, each optical element being positioned at or near a respective reflective element for receiving the light form the same incident light pathway as the respective reflective element, each optical element being arranged to control the optical property of the respective reflective element as a function of an intensity of the received light; wherein the optical property controls local filtering of the light intensity in a manner such that, above a predetermined intensity threshold, the filter reduces intensity differences of light originating from bright and dark regions of the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of filtering light from an object, the method comprising:
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receiving the light via a first imaging element by a plurality of reflective elements, each reflective element having a optical property that is dependent on an intensity of the light at or near the reflective element; detecting the light intensity at or near each reflective element, the light being received for detection from the same direction as the light that the light that is received by the reflective elements; and controlling the optical property of each reflective element in a manner such that, above a predetermined light intensity threshold, the filter reduces intensity differences of light originating from bright and dark regions of the object.
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Specification