System for 3D image projections and viewing

A projection system, comprising:

• 3D viewing glasses, the 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;
• and
• a projector configured to project the first channel of the 3D image in blue, green, and red wavelengths of light and to project the second channel of the 3D image in blue, green, and red wavelengths of light, wherein the pass areas for at least one lens filter among the first and second eye lens filters in at least one of the blue, green, and red wavelengths of light is longer than the corresponding wavelengths for at least one of the first and second channels of the 3D image in an amount greater than 0.6%*W, wherein W is a wavelength of a filter band.