OPTICAL DEVICE GIVING A RAISED APPEARANCE TO AN IMAGE THAT PARTIALLY COVERS A LUMINOUS ENERGY SENSOR
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United States of America Patent
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Issued Date -
Sep 15, 2016
app pub date -
Oct 29, 2014
filing date -
Oct 31, 2013
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Abstract
An optical device includes (a) a sensor of luminous energy from an external light source; (b) a transparent plate between the external light source and the sensor, having a first, front surface oriented towards the external light source and a second, rear surface oriented towards the sensor, the transparent plate being optically structured on one of the two surfaces thereof by a plurality of straight optical elements that are parallel to one another; and (c) a plurality of image strips separated by transparency strips. The longitudinal axis of the image strips is tilted by an angle (a) other than zero relative to the longitudinal axis of the optical elements of the transparent plate, such that images viewed through the transparent plate appear with a certain relief, while the energy production of the sensor remains substantially constant regardless of the angle of incidence of external light on the device.
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