The invention relates to an optical system for restoring a natural image combined with a digital image, in order to characterise and highlight the objects represented on the natural image. The optical system includes an objective lens, an eyepiece, a semi-reflective plate, a processing unit, capturing means and restoring means. The invention also relates to a method for producing such a digital image.

An apparatus for projecting content displayed on a display, the apparatus may include a first array of first microlenses that comprise multiple first microlenses; a second array of second microlenses that is spaced apart from the first array of microlenses and comprises multiple second microlenses; wherein a width of each first microlens and each second microlens is smaller than a few times a pixel pitch of the display; wherein the second array of second microlenses is located at a conjugate plane of the display; wherein a focal plane of each second microlenses is located at a corresponding first microlens; wherein the apparatus is configured to project different images of the display that are located at different distances from the display; wherein each image of the display comprises multiple image segments; wherein an optical path of each image segment passes through a dedicated pair of a second microlens and a corresponding first microlens.

An optical device for a head-mounted display device includes a first partial reflector and a second partial reflector positioned relative to the first partial reflector so that the second partial reflector receives first light transmitted through the first partial reflector and reflects at least a portion of the first light toward the first partial reflector as second light. At least a portion of the second light is reflected by the first partial reflector as third light, and at least a portion of the third light is transmitted through the second partial reflector. At least one of the first partial reflector or the second partial reflector includes a reflective holographic element.

Systems include three optical elements arranged along an optical axis each having a different cylinder axis and a variable cylinder refractive power. Collectively, the three elements form a compound optical element having an overall spherical refractive power (SPH), cylinder refractive power (CYL), and cylinder axis (Axis) that can be varied according to a prescription (Rx).

Provided are a video display device, a video display system, and a video display method that prevent leakage of personal information or confidential information and reduce a burden on a user. The present technology provides a video display device including a video projection unit configured to obtain identification information for identifying a user and position information including a position of a head of the user and project video light associated with the identification information toward the position, and provides a video display system including a video projection unit configured to obtain identification information for identifying a user and position information including a position of a head of the user and project video light associated with the identification information toward the position, and an eyepiece optical unit including an optical element configured to concentrate the video light to project the video light onto a pupil of the user, with the video projection unit and the eyepiece optical unit disposed separately from each other.

A surgical retractor includes a plurality of cameras integrated therein. One such retractor includes a tubular retractor and an insert supporting said plurality of cameras can be disposed within a tubular retractor.

The invention relates to an optical system for restoring a natural image combined with a digital image, in order to characterise and highlight the objects represented on the natural image. The optical system includes an objective lens, an eyepiece, a semi-reflective plate, a processing unit, capturing means and restoring means. The invention also relates to a method for producing such a digital image.

The present disclosure relates to system for dynamic image processing to improve a viewer's interaction with the real world by applying a virtual image display technology. The system for dynamic image processing comprises a target detection module configured to determine a target object for a viewer; an image capture module configured to take a target image of the target object; a process module to receive the target image, process the target image based on a predetermined process mode, and provide information of a virtual image related to the target image to a display module; and the display module configured to display the virtual image by respectively projecting multiple right light signals to a viewer's first eye and corresponding multiple left light signals to a viewer's second eye.

To provide a new method for displaying a video image on a whole circumference screen. Provided is an image display device including: an emission unit configured to emit image light along a predetermined axis; a screen arranged over a whole circumference around the predetermined axis and having a cylindrical shape with the predetermined axis as a substantially central axis; and an optical unit arranged to face the emission unit with the predetermined axis as a reference, and configured to control an incident angle of the image light emitted by the emission unit, the incident angle being with respect to the screen, in which a video image displayed by the image light incident on the screen is simultaneously displayed over a whole circumference around the predetermined axis.

A wearable display device suitable for use in an augmented reality environment is disclosed. The wearable display device can include a projector configured to project light through diffractive optical elements that then distributed the light to multiple display regions. Each of the display regions can be arranged to project light out of the wearable display device towards an eye of a user. Since each of the display regions are positioned in different locations with respect to an eye of a user, the result is that each display region directs light in a different direction. In this way the apparent field of view for a user of the wearable display can be substantially increased.