Multiocular image sensor with on chip beam splitter and inner meta micro lens for single main lens stereo camera.
We developed multiocular 1/3 inch 2.75 mm pixel size 2.1M pixel image sensors by co design of both on chip beam splitter and 100 nm width 800 nm depth patterned inner meta micro lens for single main lens stereo camera systems. A camera with the multiocular image sensor can capture horizontally one dimensional light filed by both the on chip beam splitter horizontally dividing ray according to incident angle, and the inner meta micro lens collecting the divided ray into pixel with small optical loss. Cross talks between adjacent light field images of a fabricated binocular image sensor and of a quad ocular image sensor are as low as 6% and 7% respectively. With the selection of two images from one dimensional light filed images, a selective baseline for stereo vision is realized to view close objects with single main lens. In addition, by adding multiple light field images with different ratios, baseline distance can be tuned within an aperture of a main lens. We suggest the electrically selective or tunable baseline stereo vision to reduce 3D fatigue of viewers.
Optics express