Method and System for Shaped Glasses and Viewing 3D Images

Abstract

Shaped glasses have curved surface lenses and spectrally complementary filters disposed on the curved surface lenses configured to compensate for wavelength shifts occurring due to viewing angles and other sources. The spectrally complementary filters include guard bands to prevent crosstalk between spectrally complementary portions of a 3D image viewed through the shaped glasses. In one embodiment, the spectrally complementary filters are disposed on the curved lenses with increasing layer thickness towards edges of the lenses. The projected complementary images may also be pre-shifted to compensate for subsequent wavelength shifts occurring while viewing the images.

1 . 3D viewing glasses, comprising:
 a first eye lens filter operative to pass wavelengths of light of a first channel of a 3D image and block wavelengths of light of a second channel of the 3D image; and   a second eye filter operative to pass wavelengths of light of the second channel of the 3D image and block wavelengths of light of the first channel of the 3D image;   wherein for at least one lens filter among the first and second eye lens filters, a spectral property varies across the lens filter such that spectral property at a center of the lens filter is different from that spectral property toward an edge of the lens filter, so that the spectral property of the lens filter is shifted toward longer wavelengths relative to wavelengths of light which the lens filter is intended to be operative.   
     
     
         2 . The 3D viewing glasses of  claim 1 , wherein the spectral property of the lens filter increasingly shifts red from a center to an edge of the lens filter. 
     
     
         3 . The 3D viewing glasses of  claim 1 , wherein the lens filter comprises a plurality of spectral property changes across the lens filter operative to compensate for spectral property shifts of the lens filter due to viewing angle. 
     
     
         4 . The 3D viewing glasses of  claim 1 , wherein the shift toward longer wavelengths is pronounced toward edges of the lens filter. 
     
     
         5 . The 3D viewing glasses of  claim 1 , wherein the lens filter is curved and the spectral property of the lens filter varies across the lens filter in a manner such that the combined effect of the shifted filter property, variation of filter property across the lens filter, and curvature of the lens filter essentially eliminates crosstalk between the first and second channels for an at least 20 degree viewing angle. 
     
     
         6 . The 3D viewing glasses of  claim 1 , wherein the eye lens filters have an amount of curvature such that viewing angles across a viewing screen are closer to normal angles through the filters, the curvature having a radius of curvature greater than 50 mm centered behind an entrance of a pupil of a user's eye. 
     
     
         7 . The 3D viewing glasses of  claim 1 , wherein the eye lens filters have a non-spherical curvature. 
     
     
         8 . The 3D viewing glasses of  claim 1 , wherein the eye lens filters comprise a multiple radius surface. 
     
     
         9 . The 3D viewing glasses of  claim 1 , wherein the 3D viewing glasses are configured to be utilized in viewing projections comprising first and second images each projected in blue, green and red wavelengths of light and at least one of the wavelengths for at least one of the images is shorter than the corresponding pass areas of the corresponding eye lens filter in an amount greater than 0.6%*W, wherein W is a wavelength of a filter band.