HyperOcular 140 (HO140) Visual Engine
HyperOcular 140 is proprietary, patent pending, pancake lens design by Hypervision supporting up to 60ppd and FoV up to 140° and also supporting VRDom architecture where central and peripheral visual engines are seamlessly stitched providing panoramic VR scene. For wider FoV the first to the eye surface has concave shape. Other lens surfaces have non-flat curvatures and special know-how was applied to position reflective polarizer and retarder into the stack. Therefore, HO140 is unique pancake lens allowing higher PPD in central FoV and reducing PPD for peripheral FoV. In such way, for the same display about 30% to 50% more FoV is achieved while central PPD remains high. The edge to edge (-53° to +53° eye rotation) clarity is supported for pixel density of 3,000ppi.
The figures above shows main HO140 parameters and explains how to relate to the HO140 SPEC table below.
While the maximal FoV is 140° the system FoV is function of the display size, e.g. theoretical octo-shaped 2.9" display centered with the lens will provide 2x 70° = 140° in horizontal, vertical and diagonal measures. Practically, displays for pancake lens are smaller and for 2.56" displays the monocular diagonal FoV is reaching 130°. The GEN2 HO140 visual engine is available for licensing, could be configured with ER=10,13 and 15mm and the ER=10mm version is implemented as a demo in PanoVR1.RDK​.