A medical apparatus is described for providing visualization of a surgical site. The medical apparatus includes an electronic display disposed within a display housing, the electronic display configured to produce a two-dimensional image. The medical apparatus includes a display optical system disposed within the display housing, the display optical system comprising a plurality of lens elements disposed along an optical path. The display optical system is configured to receive the two-dimensional image from the electronic display, produce a beam with a cross-section that remains substantially constant along the optical path, and produce a collimated beam exiting the opening in the display housing. The medical apparatus can also include an auxiliary video camera configured to provide an oblique view of a patient on the electronic display without requiring a surgeon to adjust their viewing angle through oculars viewing the electronic display.

The present disclosure provides a lens module. The lens module includes a lens barrel, and a lens group, a light-shielding plate and a first light-shielding sheet accommodated in the lens barrel, where the lens barrel includes a first barrel wall provided with an optical aperture, a second barrel wall bent and extending from the first barrel wall, a third barrel wall extending from the second barrel wall toward a direction away from an optical axis, and a fourth barrel wall bent and extending from the third barrel wall toward a direction away from the first barrel wall. Compared with the related art, the lens module of the present disclosure has better mechanical stability.

A virtual reality stereoscopic image expansion device with high definition where 1 to 2 monitors are provided in an independent rotary case, first or first and second left and right reflectors having reflective refraction angles of 90 in left and right directions of stereoscopic left and right eye images are provided and configured as left and right lenses for matching optical axes so that the image center of the large monitor having a screen size of a human pupil interval or more is matched with the interval between the left and right eyes of the observer by coupling the optical axes of the monitors and the reflectors with an optical structure. Thereby it makes it possible to observe the stereoscopic image by a general monitor without structures of the polarizer and the translucent mirror.

A reflective pilot light viewer is disclosed. The reflective pilot light viewer has an attachment flange securable to a water heater tank by fasteners. The reflective pilot light viewer also has a viewing segment joined to the attachment flange and extending from the access outer panel at an approximate forty-five degree to fifty degree angle, the viewing segment having an upper portion which is a reflective surface. An access outer panel having the reflective pilot light viewer and a water heater having the reflective pilot light viewer are also disclosed.

An apparatus and method for real-time audio processing employs a gaze detection sensor to detect a direction of a user's gaze and output a gaze signal corresponding to the detected direction of the user's gaze. A digital signal processing unit responds to a plurality of signals corresponding to a plurality of sounds received at the apparatus, and the determined direction of gaze to identify a signal of interest from the plurality of signals using the gaze signal. The signal of interest is processed for output to the user. In embodiments, a microphone array provides the plurality of signals. An imaging sensor may work with either the microphone array or the gaze detection sensor to identify the signal of interest.

Described are various embodiments of a light field vision device for viewing an input scene in its field of view, comprising: an input light field optics layer to capture the input scene, said input light field optics layer comprising an array of optical structures projecting a corresponding array of input light field images therethrough representative of said input scene: a wavelength conversion layer disposed so as to have said light field images projected thereon and convert at least a portion thereof to a distinct optical wavelength to be emanated therefrom; and a converted light field optics layer comprising a corresponding array of optical structures disposed so to capture light emanating from said wavelength conversion layer to reconstruct corresponding wavelength-converted light-field images therefrom for viewing.

Head-mounted display systems and methods of operation that allow users to couple and decouple a portable electronic device such as a handheld portable electronic device with a separate head-mounted device (e.g., temporarily integrates the separate devices into a single unit) are disclosed. The portable electronic may be physically coupled to the head-mounted device such that the portable electronic device can be worn on the user's head. The portable electronic device may be operatively coupled to the head-mounted device such that the portable electronic device and head mounted device can communicate and operate with one another. Each device may be allowed to extend its features and/or services to the other device for the purpose of enhancing, increasing and/or eliminating redundant functions between the head-mounted device and the portable electronic device.

Head-mounted display systems and methods of operation that allow users to couple and decouple a portable electronic device such as a handheld portable electronic device with a separate head-mounted device (e.g., temporarily integrates the separate devices into a single unit) are disclosed. The portable electronic may be physically coupled to the head-mounted device such that the portable electronic device can be worn on the user's head. The portable electronic device may be operatively coupled to the head-mounted device such that the portable electronic device and head mounted device can communicate and operate with one another. Each device may be allowed to extend its features and/or services to the other device for the purpose of enhancing, increasing and/or eliminating redundant functions between the head-mounted device and the portable electronic device.

An image display device according to an embodiment of the present technology include an emission portion, an irradiation target, and an optical portion. The emission portion emits image light along a predetermined axis. The irradiation target is disposed at at least a part around the predetermined axis. The optical portion controls an incident angle of the image light on the irradiation target, the image light having been emitted from the emission portion, the optical portion being disposed in a manner that the optical portion faces the emission portion on the basis of the predetermined axis.

An apparatus and method wherein the apparatus includes an image source; an exit pupil configured to be positioned proximate to an eye of a user to enable a user to view an image from the image source; and a plurality of grating areas between the image source and the exit pupil wherein the plurality of grating areas are configured to direct beams of light from the image source to the exit pupil; wherein the image source is configured to be moved relative to the plurality of grating areas to control the position of the exit pupil relative to the eye of the user.