A hair weave removal tool includes a handle, an elongated member, a magnifier, and a light source. The elongated member extends from an end of the handle. The elongated member includes an extension extending outwardly therefrom and a guide member located laterally adjacent the extension. The magnifier is pivotably coupled to the handle laterally adjacent the elongated member. The light source is coupled to the handle, and is configured to illuminate an area above the extension.

The present invention relates to a transparent prescription screen protector. The transparent prescription screen protector provides a prescribed corrected power range for a user with a presbyopia vision defect. The screen protector also protects a display screen on which the cover is applied from scratches, breakage and other damage and debris. The screen protector is a multi-layer device, wherein the top layer is touch sensitive and is configured to receive the user's touch input. The bottom layer has an adhesive backing to removably secure the screen protector to the display screen. The intermediate layer has embedded prescription lenses with a prescribed power range and configured to compensate for the farsightedness vision defect of the user, thereby allowing the user to view the content displayed on the display screen clearly.

An handheld magnifying lens includes a body and a lens. The body includes a lens frame. The lens is arranged in the lens frame and has a convex curved surface and a concave curved surface opposite to the convex curved surface. A curvature radius of the convex curved surface is less than a curvature radius of the concave curved surface to avoid glare.

Using a camera pointing downward, a working area below eye level can be displayed by a headwear for users, so that the user can maintain healthy sitting or standing posture while working on patients or objects located below eye level. Using two or more cameras pointing downward, three-dimensional views with accurate and natural depth perception of a working area can be displayed by a headwear for users. Additional functions including eye protection, zoom-in, zoom-out, on-off, lighting control, overlapping, and teleconference capabilities are also supported using electronic, video and audio devices associated with the headwear. The headwear can also comprise a face shield designed to protect the user from hazardous droplets, aerosols, harmful wavelengths of light, heat, sparks, flash burn, debris and/or flying objects. Contactless control devices can be used to control the functions of the headwear.

Disclosed are high-density energy directing devices and systems thereof for two-dimensional, stereoscopic, light field and holographic head-mounted displays. In general, the head-mounted display system includes one or more energy devices and one or more energy relay elements, each energy relay element having a first surface and a second surface. The first surface is disposed in energy propagation paths of the one or more energy devices and the second surface of each of the one or more energy relay elements is arranged to form a singular seamless energy surface. A separation between edges of any two adjacent second surfaces is less than a minimum perceptible contour as defined by the visual acuity of a human eye having better than 20/40 vision at a distance from the singular seamless energy surface, the distance being greater than the lesser of: half of a height of the singular seamless energy surface, or half of a width of the singular seamless energy surface.

A supply circuit for supplying a light-emitting element includes a voltage regulator having a voltage output for outputting an output voltage and having a control input for regulating the output voltage based on a voltage at a divider node of a voltage divider. A first and a second terminal are used to connect the light emitting element, the first terminal being coupled to the voltage output and the second terminal being coupled to a reference potential terminal via a series resistor. The supply circuit further includes a control block having an analog-to-digital converter for generating a digital voltage feedback value from a voltage applied to the second terminal, a control element, and a digital-to-analog converter coupled to the divider node for outputting an analog control signal based on a digital control value. The control element is arranged to compare the voltage feedback value with a reference feedback value, if the voltage feedback value is less than the reference feedback value, to change the control value in a first direction, and if the voltage feedback value is greater than the reference feedback value, to change the control value in a second direction.

Disclosed are systems and methods for manufacturing energy relays for energy directing systems and Transverse Anderson Localization. Systems and methods include providing first and second component engineered structures with first and second sets of engineered properties and forming a medium using the first component engineered structure and the second component engineered structure. The forming step includes randomizing a first engineered property in a first orientation of the medium resulting in a first variability of that engineered property in that plane, and the values of the second engineered property allowing for a variation of the first engineered property in a second orientation of the medium, where the variation of the first engineered property in the second orientation is less than the variation of the first engineered property in the first orientation.

Disclosed embodiments include an energy directing device having one or more energy relay elements configured to direct energy from one or more energy locations through the device. In an embodiment, surfaces of the one or more energy relay elements may form a singular seamless energy surface where a separation between adjacent energy relay element surfaces is less than a minimum perceptible contour. In disclosed embodiments, energy is produced at energy locations having an active energy surface and a mechanical envelope. In an embodiment, the energy directing device is configured to relay energy from the energy locations through the singular seamless energy surface while minimizing separation between energy locations due to their mechanical envelope. In embodiments, the energy relay elements may comprise energy relays utilizing transverse Anderson localization phenomena.

Disclosed are transparent energy relay waveguide systems for the superimposition of holographic opacity modulation states for holographic, light field, virtual, augmented and mixed reality applications. The light field system may comprise one or more energy waveguide relay systems with one or more energy modulation elements, each energy modulation element configured to modulate energy passing therethrough, whereby the energy passing therethrough may be directed according to 4D plenoptic functions or inverses thereof.

Disclosed are relay elements exhibiting transverse localization. The relay elements may include a relay element body having one or more structures, where the structures can be coupled in series, in parallel and/or in stacked configurations. The structures may have multiple surfaces such that energy waves propagating therethrough the relay elements may experience spatial magnification or de-magnification.