The invention relates to a lens, comprising a container (100) defining a volume (V) which is filled with a transparent liquid (2), wherein the container (10) comprises a transparent and elastically deformable membrane (20) and a rigid member (30), wherein the membrane (20) and the rigid member (30) delimit said volume (V), and a lens shaping element (200) that contacts the membrane (20) and defines an area (21) of said membrane (20), which area (21) has an adjustable curvature for adjusting the focal length of the lens (1). According to the invention, the lens (1) is configured to compensate a thermal expansion of the liquid (2) and/or a change of the refractive index of the liquid (2) due to an increased temperature of the liquid (2) in order to reduce an unwanted thermally induced change of the focal length of the lens (1).

A wavelength selective filter includes a filter material. The filter material includes a host matrix doped with metal ions. The filter material has a transmission region within a deep ultraviolet (UV) range such that UV light at wavelengths within the transmission region is transmitted through the filter material.

A wavelength selective filter includes a filter material. The filter material includes a host matrix doped with metal ions. The filter material has a transmission region within a deep ultraviolet (UV) range such that UV light at wavelengths within the transmission region is transmitted through the filter material.

In one embodiment, a fluid transfer component for transferring thermal energy comprises a film comprising a polymer with a thickness less than 5 millimeters, an input side constructed to receive fluid that flows from the input side to an active region of the film, more than 20 fluid channels defined by interior surfaces within the film, each fluid channel separated spatially in at least 1 row in a thickness direction of the film, the more than 20 fluid channels have a channel density across the active region greater than 5 fluid channels per centimeter, wherein the thermal energy is transferred to or from an environment and the fluid in the active region. The film may be an extruded microcapillary film or interior surfaces may comprise a surface modified to produce a surface relief profile. The active region may cool or warm the environment, which may comprise an individual.

A system for preventing motion sickness resulting from virtual reality or augmented reality is disclosed herein. In one embodiment, the system includes a virtual reality or augmented reality headset configured to be worn by a user, the virtual reality or augmented reality headset configured to create an artificial environment and/or immersive environment for the user; at least one fluidic lens disposed between an eye of the user and a screen of the virtual reality or augmented reality headset; and a fluid control system operatively coupled to the at least one fluidic lens. In another embodiment, the system includes at least one tunable prism disposed between an eye of the user and a screen of the virtual reality or augmented reality headset, the at least one tunable prism configured to correct a convergence problem associated with the eye of the user.

A control system for an optical assembly having a fluid optical cell coupled to a hydraulic drive system includes a detector system that detects a line-of-sight of a user based on electromagnetic energy reflected from an eye of a user. The control system additionally includes a controller configured to determine a distance to an observed object based on the detected line-of-sight. The control system is also configured to control the hydraulic drive system to modify hydraulic pressure applied to the fluid optical cell such that the fluid optical cell is focused on the observed object.

A liquid lens can include a chamber and a first fluid and a second fluid contained in the chamber. The first fluid and the second fluid may be immiscible, forming a fluid interface between the two fluids. The liquid lens may also include a first electrode insulated from the two fluids. The liquid lens may include a second electrode in electrical communication with the first fluid. The liquid lens may be configured such that a position of the fluid interface is based at least in part on voltages applied to the electrodes. The lens may further include a window configured to transmit light therethrough along an optical axis. Further, a flexible member may be configured to cause the window to displace axially along the optical axis to change the volume of the chamber.

An article includes a reflector having a first surface, a second surface opposite the first surface, and a third surface; and a first selective light modulator layer external to the first surface of the reflector; wherein the third surface of the reflector is open. A method of making an article is also disclosed.

Examples include a device including a fluid lens having a membrane, a substrate, and a fluid at least partially enclosed between the membrane and the substrate. The membrane may have a spatial variation in at least one membrane parameter along a particular direction, that may compensate for gravity sag in the membrane of the fluid lens when the device is worn by a user. Examples also include related methods and systems.

Examples include a device including a fluid lens having a membrane, a substrate, and a fluid at least partially enclosed between the membrane and the substrate. The membrane may have a spatial variation in at least one membrane parameter along a particular direction, that may compensate for gravity sag in the membrane of the fluid lens when the device is worn by a user. Examples also include related methods and systems.