OPTICAL ARRANGEMENT AND AN AUTOSTEREOSCOPIC DISPLAY DEVICE INCORPORATING THE SAME
First Claim
1. An optical arrangement having at least a lens mode in which it is a lens arrangement comprising an array (9) of positive lenticular lenses (11), each respective one of the positive lenses comprising a first layer and second layer having an interface between each other defining the lenticular lens surface, the first layer having a first refractive index and the second layer having a second refractive index that is different from the first refractive index, the lens array having a lens pitch and the lenticular lens surfaces having a radius of curvature at their centre, wherein the product of the first refractive index with the lens pitch divided by two times the radius of curvature is greater than 0.6.
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Accused Products
Abstract
An autostereoscopic display lens arrangement comprises an array (9) of parallel lenticular lenses (11), wherein the lens array comprises first and second materials of different refractive indices (60,62) sandwiched between planar substrates, with the interface between the first and second materials defining the lens surfaces. The first material has a refractive index n1, the lens array has a lens pitch p and the lenticular lenses have a radius of curvature at their centre of R, and the lenses satisfy n1 (p/2R)>0.6. This arrangement gives reduced banding and loss of intensity at steep angles when used in an autostereoscopic display.
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17 Claims
- 1. An optical arrangement having at least a lens mode in which it is a lens arrangement comprising an array (9) of positive lenticular lenses (11), each respective one of the positive lenses comprising a first layer and second layer having an interface between each other defining the lenticular lens surface, the first layer having a first refractive index and the second layer having a second refractive index that is different from the first refractive index, the lens array having a lens pitch and the lenticular lens surfaces having a radius of curvature at their centre, wherein the product of the first refractive index with the lens pitch divided by two times the radius of curvature is greater than 0.6.
Specification