LC lens systems to solve accommodation/convergence conflict in three-dimensional and virtual reality displays

Abstract

Accommodation-convergence mismatch is still an unsolved issue within the field of augmented reality, virtual reality, and three-dimensional systems in general. Solutions suggested to correct the focus cue in recent years require additional bandwidth, or compromise the image resolution. Our simple approach to overcome this issue is by using an eye-tracking system and electronic lenses. We propose an electronic hybrid lens system composed of segmented phase profile liquid crystal and Pancharatnam phase lenses. For practical application, eye tracking is necessary for measuring the toe-in of the user's pupil to calculate the object depth. This information is used to determine the required diopteric power of the hybrid system. The optical performance and imaging quality of the proposed hybrid system are evaluated.

Graphic Composition Art of Packaging Visual Communication Design Based on VR

“…Concentrate on the form composition and sensory elements of virtual packaging, which is a new concept, and classify the virtual packaging manifestations that contain these elements. According to literature [22], no design activity is solely for the purpose of design.…”

Multifocal displays: review and prospect

“…Optical elements with polarization-dependent focal lengths can offer the same features as the systems comprising polarization-dependent optical distances, yet usually with a compact size. Figure 9 illustrates the optical behavior of several special optical lenses with polarization-dependent focal length, including anisotropic crystal lenses [72], LC Fresnel lenses [73][74][75][76], Pancharatnam-Berry phase lenses (PBLs) [77][78][79][80] and CLC lenses [81]. Even though only part of them has been implemented to enable a multifocal display, the others also hold great potential for this application.…”

45‐2: Limits of Pancharatnam Phase lens for 3D/VR/AR Applications

“…In a recent study by our lab, an alternative solution was proposed in which the response time and/or optical power could be enhanced without adding more complicated tunable LC lens. The idea is to use a Segmented Phase Profile (SPP) LC lens in combination with Pancharatnam phase device (PPDs) which has been introduced in a hybrid design system for AR/VR/3d in [5] .…”

“…(ξ , η)In the case of green light, a point source on the image plane is expected to yield a diffraction limited spot on the image plane. Red and blue wavelengths are expected to yield a larger spot size since the focal length is wavelength dependent.The spot size calculation utilizes scalar diffraction theory which is expressed by equation(5). equation 5, λ represents the wavelength of incident light, z is the distance between the source plane and observation plane, r is the distance between a point (ξ , η) on the source plane and a point (x , y) on observation plane (…”