System for 3d image projections and viewing

Abstract

Shaped glasses have curved surface lenses with spectrally complementary filters disposed thereon. The filters curved surface lenses are configured to compensate for wavelength shifts occurring due to viewing angles and other sources. Complementary images are projected for viewing through projection filters having passbands that pre-shift to compensate for subsequent wavelength shifts. At least one filter may have more than 3 primary passbands. For example, two filters include a first filter having passbands of low blue, high blue, low green, high green, and red, and a second filter having passbands of blue, green, and red. The additional passbands may be utilized to more closely match a color space and white point of a projector in which the filters are used. The shaped glasses and projection filters together may be utilized as a system for projecting and viewing 3D images.

1 . Viewing filters comprising spectrally complementary filters, comprising:
 a first filter having a first passband configured to pass only a first color of light, a second passband configured to pass only a second color of light, and a further transmission region configured to pass only a third color of light; and   a second filter having a first passband comprising the first color of light and the second color of light, and a second passband comprising the second color of light and the third color of light;   wherein the second filter blocks visible light having longer wavelengths than those contained in the second passband of the second filter.   
     
     
         2 . The viewing filters according to  claim 1 , wherein the second filter has a further transmission region configured to pass only the first color of light. 
     
     
         3 . The viewing filters according to  claim 1 , wherein the first color of light is blue, the second color of light is green, and the third color of light is red. 
     
     
         4 . The viewing filters according to  claim 1 , wherein the filters comprise a non-flat substrate comprising a curved surface configured to reduce a wavelength shift that occurs when viewing an image at other than a normal angle through the filters. 
     
     
         5 . The viewing filters according to  claim 4 , wherein the curved surface comprises a radii of approximately 90 mm. 
     
     
         6 . The viewing filters according to  claim 1 , wherein at least one of the filters is configured to have at least one passband configured to pass two spectrum adjacent colors that are separated by a notchband. 
     
     
         7 . 3D viewing glasses, comprising:
 a first filter disposed on a first lens of the glasses, and a second filter that is spectrally complementary to the first filter disposed on a second lens of the glasses; wherein   the spectrally complementary filters account for a blue shift that occurs when viewing images at off-normal angles via both of, a combination of guardbands between passbands of the first filter and passbands of the second filter, and a curvature of the lenses.   
     
     
         8 . The viewing filters according to  claim 7 , wherein at least one of the spectrally complementary filters comprises a single passband configured to pass two different colors of light. 
     
     
         9 . The viewing filters according to  claim 7 , wherein the spectrally complementary filters comprise a first filter having a set of N passbands configured to pass a set of more than N primary color lightbands. 
     
     
         10 . The viewing filters according to  claim 7 , wherein:
 the spectrally complementary filters comprise a first filter comprising a first set of passbands configured to pass a first set of primary lightbands and a second filter comprising a second set of passbands configured to pass a second set of primary lightbands, wherein the first set of primary lightbands are mutually exclusive to the second set of primary lightbands;   at least one of the passbands encompasses at least two of the primary lightbands; and   the first set of passbands and the second set of passbands are separated by guard bands having a width calculated to maintain separation between the primary lightbands when viewed through the viewing filters and compensate for blue shift due to a viewing angle of the primary lightbands through the viewing filters.   
     
     
         11 . A filter comprising three mutually exclusive passbands of visible light, a first passband configured to pass only a first color of light, a second passband configured to pass two spectrum adjacent colors of light comprising the first color of light and a second color of light, and a third passband configured to pass two spectrum adjacent colors of light comprising the second color of light and a third color of light. 
     
     
         12 . The filter according to  claim 11 , wherein the first color of light is blue, the second color of light is green, and the third color of light is red. 
     
     
         13 . The filter according to  claim 11 , wherein at least one of the spectrum adjacent colors of light are separated by a notch band. 
     
     
         14 . The filter according to  claim 11 , wherein the filter is installed in a 3D projection system comprising a server that performs color correction using the spectrum adjacent colors of light. 
     
     
         15 . The filter according to  claim 11 , wherein:
 the filter comprises a first filter disposed on a first lens of a pair of 3D viewing glasses, and a second filter that is spectrally complementary to the first filter;   the spectrally complementary filters account for a blue shift that occurs when viewing images at off-normal angles via both of, a combination of guardbands between passbands of the first filter and passbands of the second filter, and a curvature of the lenses; and   the curvature of the lenses comprises a radius of approximately 40 mm to 200 mm.   
     
     
         16 . The filter according to  claim 11 , wherein the first passband ranges from below approximately 430 nm to approximately 442 nm, the second passband ranges from approximately 486 nm to approximately 528 nm, and the third passband ranges from approximately 571 nm to approximately 624 nm. 
     
     
         17 . A viewing system, comprising:
 glasses comprising a pair of left and right spectrally complementary viewing filters disposed on the glasses; and   a display system configured to display spectrally separated left and right images respectively configured to be viewed through the left and right spectrally complementary viewing filters;   wherein the display system comprises a pair of left and right spectrally complementary projection filters, and wherein at least one light band that is blocked by one of the projection filters is passed by the corresponding viewing filter.   
     
     
         18 . A viewing system, comprising:
 glasses comprising a pair of left and right spectrally complementary viewing filters disposed on the glasses; and   a display system configured to display spectrally separated left and right images respectively configured to be viewed through the left and right spectrally complementary viewing filters;   wherein at least one light band that the display system does not display in any of the left images is passed by the left viewing filters, and/or at least one light band that the display system does not display in any of the right images is passed by the right viewing filter.   
     
     
         19 . A 3D viewing system comprising a first filter set comprising a projection filter and a viewing filter, wherein the projection filter has a different number of passbands than the viewing filter. 
     
     
         20 . The 3D viewing system according to  claim 19 , wherein the bandwidths and number of passbands of each filter are not the same. 
     
     
         21 . The 3D viewing system according to  claim 19 , wherein the viewing filter includes passbands that approximately encompass passbands of the projection filter; and
 the passbands of the projection filter are pre-blue-shifted compared to the passbands of the viewing filter.   
     
     
         22 . The 3D viewing system according to  claim 19 , wherein the projection filter comprises at least one channel comprising at least two passbands of light in adjacent colors separated by a blocking notch. 
     
     
         23 . The 3D viewing system according to  claim 22 , wherein the viewing filters comprise passband channels approximately encompassing the passbands of the projection filter including the blocking notch such that if the blocking notch were not present light passing the projection filter in the wavelengths of the blocking notch would also pass through the viewing glasses. 
     
     
         24 . A filter system, comprising:
 a projection filter, comprising,   a set of first channel passbands and a set of second channel passbands configured to pass light,   a set of guard bands configured to block light between adjacent passbands of different channels, and   at least one notchband between adjacent colors of a same channel passband configured to block light between the adjacent colors.   
     
     
         25 . The filter system according to  claim 24 , further comprising a set of viewing filters including a first channel viewing filter and a second channel viewing filter, wherein the viewing filter corresponding to the channel of the notchband passes light wavelengths corresponding to the notchband. 
     
     
         26 . The filter system according to  claim 24 , wherein the at least one notchband comprises at least two notchbands comprising a blue-green notchband and a green-red notchband. 
     
     
         27 . The filter system according to  claim 24 , wherein the first set of channel passbands has a different number of primary passbands than the second set of channel passbands. 
     
     
         28 . The filter system according to  claim 24 , wherein the first channel passbands comprise wavelengths of approximately 400 to 440 nm, 484 to 498 nm, 514 to 528 nm, 567 to 581 nm, and 610 to 623 nm. 
     
     
         29 . The filter system according to  claim 24 , wherein the second channel passbands comprise wavelengths of approximately 455 to 471 nm, 539 to 556 nm, and 634 to 700 nm.