In various embodiments, a beam-parameter adjustment system and focusing system alters a spatial power distribution of a radiation beams before the beam is coupled into an optical fiber or delivered to a workpiece.

The disclosed method may include (1) providing, from a display, an image to an eye by way of a lens assembly on an optical path between the display and the eye, wherein the lens assembly includes (a) a first liquid crystal lens providing a first electronically controllable cylindrical power, oriented along a first constant axis, in response to a first signal and (b) a second liquid crystal lens providing a second electronically controllable cylindrical power, oriented along a second constant axis that is rotationally offset from the first constant axis, in response to a second signal, (2) determining, based on information indicating cylindrical power and cylindrical axis components, the electronically controllable cylindrical powers that result in providing the cylindrical power component, oriented along the cylindrical axis component, and (3) generating, based on the electronically controllable cylindrical powers, the signals. Various other systems and methods are also disclosed.

A hybrid lens is disclosed including optically coupled varifocal lens and adaptive lens. The varifocal lens is configured for varying optical power of the hybrid lens, and an adaptive lens includes a voltage-controlled element for varying optical power of the adaptive lens in coordination with varying the optical power of the varifocal lens and responsive to variation of the optical power of the hybrid lens, for lessening an optical aberration of the hybrid lens. The hybrid lens may be used in head-mounted displays e.g. for lessening a vergence-accommodation conflict.

A hybrid lens is disclosed including optically coupled varifocal lens and adaptive lens. The varifocal lens is configured for varying optical power of the hybrid lens, and an adaptive lens includes a voltage-controlled element for varying optical power of the adaptive lens in coordination with varying the optical power of the varifocal lens and responsive to variation of the optical power of the hybrid lens, for lessening an optical aberration of the hybrid lens. The hybrid lens may be used in head-mounted displays e.g. for lessening a vergence-accommodation conflict.

An electro-holographic light field generator device is disclosed. The light field generator device has an optical substrate with a waveguide face and an exit face. One or more surface acoustic wave (SAW) optical modulator devices are included within each light field generator device. The SAW devices each include a light input, a waveguide, and a SAW transducer, all configured for guided mode confinement of input light within the waveguide. A leaky mode deflection of a portion of the waveguided light, or diffractive light, impinges upon the exit face. Multiple output optics at the exit face are configured for developing from each of the output optics a radiated exit light from the diffracted light for at least one of the waveguides. An RF controller is configured to control the SAW devices to develop the radiated exit light as a three-dimensional output light field with horizontal parallax and compatible with observer vertical motion.

According to one embodiment, an optical element, including a first liquid crystal lens formed of liquid crystal molecules, a polarizer opposed to the first liquid crystal lens, a first modulating portion located between the first liquid crystal lens and the polarizer to modulate incident light and a first unmodulating portion located between the first liquid crystal lens and the polarizer and adjacent to the first modulating portion.

A head-mounted display (HMD) presented herein comprises an electronic display and an optical assembly. The electronic display is configured to emit image light. The optical assembly is configured to direct the image light to an eye-box of the HMD corresponding to a location of a user's eye. The optical assembly includes a multifocal optical element, e.g., a bifocal optical element. A first portion of the multifocal optical element has a first optical power that is associated with a first image plane. The second portion of the multifocal optical element has a second optical power different than the first optical power, the second portion associated with a second image plane.

Disclosed are near-eye displaying methods and systems capable of multiple depths of field imaging. The method comprises two steps. At a first step, one or more pixels of a self-emissive display emit a light to a collimator such that the light passing through the collimator is collimated to form a collimated light. At a second step, the self-emissive display provides at least one collimated light direction altering unit on a path of the light from the collimator to change direction of the collimated light to enable the collimated light from at least two pixels to intersect and focus at a different location so as to vary a depth of field.

Disclosed is a display assembly which comprises a substrate, a plurality of light emitting units, a transistor unit and a capacitor unit corresponding to each of the plurality of light emitting units. Each of the plurality of light emitting units is electrically coupled to the corresponding transistor unit and the capacitor unit, all of which are independently provided on a side of the substrate. A spacing between each of the plurality of light emitting units is at least two times of a first threshold length.

Described herein is a human eye emulator device that emulates the human eye's responses to light. The human eye emulator device is based on an electro-optical liquid crystal eye model. The human eye emulator device includes a Pancharatnam berry phase (PBP) liquid crystal (LC) lens, a liquid crystal (LC) shutter glass, and a liquid crystal (LC) lens. The PBP LC lens emulates the cornea. The PBP LC lens receives light and refracts the received light. The LC shutter glass emulates the pupil. The LC shutter glass forms a dynamic aperture that transmits a portion of the light refracted by the PBP LC lens. The LC lens emulates the crystalline lens. The LC lens receives the portion of light transmitted by the LC shutter glass and refracts the received portion of light through the LC shutter glass onto an imaging surface.