An optical device is suggested, which comprises a container (2) enclosing an internal space (3), wherein the internal space (3) is filled with a transparent liquid (4), and wherein the container (2) comprises a transparent bottom (5) and a transparent and elastically deformable membrane (6) opposing said bottom (5) such that the liquid (4) is arranged between the membrane (6) and the bottom (5), a circumferential lens shaping element (10) connected to the membrane (6) so that a circumferential edge of the lens shaping element (10) defines a central area (8) of the membrane (6) so that light can pass through the container (2) via the central area (8) and the bottom (5), wherein the lens shaping element (10) is deformable and comprises a plurality of actuation points (11), wherein in each of the actuation points (11) the lens shaping element (10) is moveably mounted with respect to the transparent bottom (5) by a bearing means (12) and wherein at least one actuation point (11) is displaceable with respect to the transparent bottom (5).

The information display apparatus configured to display video information of a virtual image on a reflecting surface of conveyance includes: a display configured to display the video information; and a virtual image optical system configured to display a virtual image at a front of the conveyance by reflecting light emitted from the display by means of the reflecting surface. The virtual image optical system includes a concave mirror and an optical element. The optical element is arranged between the display and the concave mirror, and is configured to correct distortion of the virtual image obtained so as to correspond to a viewpoint position of a driver on a basis of a shape of the concave mirror and a shape of the optical element. The information display apparatus further includes a virtual image double image conversion reducer configured to reduce double image conversion of the virtual image.

A lens unit with a central axis is provided. The lens unit includes a fixed portion, a movable portion, and a first driving assembly. The fixed portion includes an outer frame and a bottom combined with the outer frame. The outer frame and the bottom are arranged along the central axis. The movable portion is movably connected to the fixed portion, and carries a lens with an optical axis. The central axis is not parallel to the optical axis. The first driving assembly is connected to the movable portion, and drives the movable portion to move relative to the fixed portion. The first driving assembly also includes a biasing element made of a shape memory alloy.

Systems and methods for auto-calibrating a virtual reality (VR) or augmented reality (AR) head-mounted display to a given user with a refractive condition without adding corrective lenses to optical elements of the head-mounted display and without requiring subjective refraction procedures. A method comprises projecting a grid onto an eye of a user using a light source of a head-mounted display worn by the user, capturing the grid as-reflected from the eye using a camera of the head-mounted display, determining a pattern of a reflection of the grid based on the grid as-reflected, generating an aberration map based on a difference between the pattern as-reflected and the grid as-projected, and determining a correction to apply to at least one viewing lens of the head-mounted display worn by the user based on the aberration map.

Aberrations of a projection lens for microlithography can be subdivided into two classes: a first class of aberrations, which are distinguished by virtue of the fact that their future size increases by a non-negligible value after a constant time duration, independently of their current size, and a second class of aberrations, which, after reaching a threshold, only increase by a negligible value after each further time duration. An adjustment method is proposed, which adjusts these two classes of aberrations in parallel in time with one another.

A flexible display device includes a flexible display panel, a correction panel, and a flexible printed circuit board. The correction panel includes a shape memory polymer layer and a driver. The shape memory polymer layer includes microlenses and the driver control the microlenses. The flexible printed circuit board connects the driver to a driving circuit board.

A method and an apparatus of a powder bed fusion additive manufacturing system that enables a quick change in the optical beam delivery size and intensity across locations of a print surface for different powdered materials while ensuring high availability of the system. A dynamic optical assembly containing a set of lens assemblies of different magnification ratios and a mechanical assembly may change the magnification ratios as needed. The dynamic optical assembly may include a transitional and rotational position control of the optics to minimize variations of the optical beam sizes across the print surface.

In certain embodiments, a gimbal assembly includes an enclosure, a window, and a pivot assembly. The enclosure is centered on a first axis and the window is coupled to the enclosure. The pivot assembly is coupled to an interior portion of the enclosure and configured to pivot within the enclosure about a second axis, the second axis being perpendicular to the first axis. The pivot assembly includes a base portion, a mirror coupled at an angle to the base portion and configured to reflect light received through the window, and a sensor configured to receive the light reflected by the mirror. The pivot assembly is further configured to move within the enclosure in a direction that is perpendicular to the first axis and rotate about the first axis.

An electro-optical device includes a mirror being positioned above a surface of a substrate and modulating light, and a torsion hinge being positioned between the mirror and the substrate and pivotably supporting the mirror. The electro-optical device includes beam portions being disposed between the mirror and the substrate at positions that do not overlap the mirror in plan view, and being supported by the substrate while being spaced away from the mirror and the substrate. Spring tips that regulate a pivot range of the mirror protrude from the beam portions toward positions that overlap the mirror in plan view.

An optical lens assembly includes an optical lens and a Pancharatnam Berry Phase (“PBP”) element coupled to the optical lens. The PBP element is configured to provide chromatic aberration correction for the optical lens. An Abbe number of the PBP element and an Abbe number of the optical lens have opposite signs.