The invention provides a directive imaging method used for displaying images in a specified optical window. The method is realized based on a focusing element array layer and a micro picture and textarray layer, the focusing element array layer consists of a plurality of focusing element units, the micro picture and text array layer consists of a plurality of micro picture and text units, and each micro picture and text unit corresponds to one focusing element unit; under illumination of a power source, light rays pass through a micro picture and text array and a focusing element array, and therefore a Moire image and the optical window are formed; via a directive imaging device, information of the specified Moire image can be seen in the optical window and cannot be seen beyond the optical window, and therefore safety and privacy of the imaging device formed via the above method can be improved. Displayed picture and text information can be dynamic or three-dimensional and can be free from chromatic dispersion, and safety and secrecy performance of the device can be effectively improved.

Directive imaging device, method and application

The present invention discloses an augmented reality device and a display method. The device includes a display device, a liquid crystal lens disposed above the display area of the display device, anda light guiding device matched with the liquid crystal lens and is used for transmitting light. According to the augmented reality device and the display method of the invention, the liquid crystal lens, the light guiding device and the display device are used in combination; the liquid crystal lens has a focal length adjustment function; the lens of different focal lengths can form virtual images with different spatial depths for the display device of the same object distance; the lens can be combined with the light guiding device, so that imaging light and real ambient light can enter the eyes of a person, and therefore, AR (augmented reality) display with a plurality of spatial imaging depths can be realized; the vibration direction of the light emitted by the display device is not required to be limited; and the augmented reality device is of a flat structure and can realize focal length adjustment without requiring a plurality of lenses, and therefore, with only one liquid crystal lens adopted, the augmented reality device can realize a plurality of imaging space depths. The augmented reality device is smaller in spatial size than that of an augmented reality device providedwith a plurality of lenses of different focal lengths; and the whole device can be flattened.

Augmented reality device and display method

The invention relates to the field of display, in particular to an optical field display method and an optical field display engine. A projector is used for sequentially projecting two-dimensional image information sequences in a specified visual angle range according to a time sequence, the two-dimensional image information sequences are projected to a space of a corresponding visual angle rangethrough galvanometer reflection and scanning, the reflection angle of the galvanometer is in one-to-one correspondence to the view angle of the two-dimensional image, and when the galvanometer scans adesignated angle position, the projector is used for synchronously projecting the two-dimensional image information of the corresponding visual angle range; a controller is used for controlling the galvanometer to scan back and forth in a set angle as well as coordinating the time sequence of the projector and synchronously projecting the two-dimensional image information of the corresponding visual angle range according to the angle scanned by the galvanometer, so that a three-dimensional image is formed in the space. According to the optical field display method in the invention, three-dimensional images with high resolution, large depth of field and large visual angle can be obtained, moreover, the safety coefficient is high, the system size is small, and convenience is brought for calibration.

Optical field display method and optical field display engine

The invention relates to a three-dimensional display method and system with high information flux and low crosstalk. A timing directional illumination module outputs illumination light of different directions according to a certain time series. The illumination light illuminates a light field display system formed by a display and a lens array from different angles. The light field display systemdisplays light field information of three-dimensional images of specified viewing angle ranges under illumination light of specified directions. The illumination light directions of the specified directions correspond to the specified viewing angle ranges one to one. The refresh timing sequence of the images displayed on the display of the light field display system are synchronously matched withthe illumination timing sequence of the timing directional illumination module, and three-dimensional image information in the same viewing angle range is superimposed and synthesized into a high-spatial-resolution three-dimensional image by time division multiplexing. According to the three-dimensional display system and method provided by the present invention, the three-dimensional image with ahigh resolution, a large viewing range and a large depth of field is provided, crosstalk noise does not exist, the image contrast is high, and the structure of the three-dimensional display system issimple.

Three-dimensional display method and system with high information flux and low crosstalk

The invention discloses a moire imaging system. The moire imaging system comprises a micro-porous layer, a micro-graphic layer and a micro-lens array layer; the micro-porous layer is provided with anarray type through hole structure; a light transmission part is formed at the position of the through hole; a shading part is formed at the non-through hole part of the micro-porous layer; the micro-porous layer comprises a first surface and a second surface, which are relatively arranged; the micro-graphic layer is positioned on the first surface; the micro-graphic layer comprises one or more arrayed micro-graphic units; the micro-graphic units are positioned at one side of the light transmission part; the micro-lens array layer is positioned on the second surface; the micro-lens array layercomprises multiple micro-lenses; the micro-lenses are arranged at the other side of the light transmission part; and the three-dimensional effect of the micro-graphic units can be observed through themicro-lens array layer. Crosstalk of sampling among different micro-lenses can be avoided; therefore, an image has the direction viewing angle; and thus, the moire imaging system has the obvious application effects in the fields of three-dimensional display, counterfeiting resistance and the like.

Moire imaging system

The invention discloses a large-depth-of-field true three-dimensional augmented reality display method and system. An information display module group formed by a micro display device and a lens arrayis irradiated by a plurality of point light sources and a virtual true three-dimensional image is obtained in three-dimensional space; and information of the virtual true three-dimensional image is superposed to a realistic objective environment by the information display module group to realize true three-dimensional augmented reality displaying. The micro display device is not arranged at a doubled focal length of the lens array and the superposition depths of the virtual true three-dimensional image are different under point light source irradiation at different positions. Therefore, problems that the depth of field of the image is limited in the current augmented reality display system, a conflict between the focusing of an observer and a convergence competition exists in the currentaugmented reality display system and the depth-of-field control mechanism is complicated and the response speed is low of the current augmented reality display system can be solved; and thus real-time-response 3D image augmented reality displaying of the large-depth-of-field true three-dimensional image is realized.

Large-depth-of-field true-three-dimensional augmented reality display method and system

The invention is proposed based on a focusing element array layer and a micro-image-text array layer, and provides a double-imaging method, a device and an application thereof for the first time. According to the invention, the micro-image-text unit of a to-be-imaged graph is formed by a pixel unit. The pixel unit generates the scattered light and the zero-level light under the illumination of a light source. The zero-level lights generated by a plurality of micro-image-text units are respectively focused and then converged to form a first set of amplified Moire images. The scattered light ofthe micro-image-text units is focused to form a second set of amplified Moire images. The imaging method and the imaging system have special optical response, and can be applied to the fields of information and image processing, anti-counterfeiting safety, packaging decoration and the like.

Double-imaging method, device and application thereof

The invention discloses a security feature identification method. The method is implemented based on a reflection type safety element film composed of a focusing element array layer, a base material layer, a micrographic array layer and a reflection layer. True and false identification is achieved through light response produced when a point light source or a collimation light source irradiate the reflection type safety element film. The invention further provides the reflection type safety element film. Compared with other safety elements, the reflection type safety element film is more compact in structure, capable of carrying out real-time dynamic response on light illumination, capable of achieving the response effect which is unrealizable for other safety elements, and higher in anti-false safety performance.

Hu Juanmei

Papers

Large-depth-of-field true-three-dimensional augmented reality display method and system

Directive imaging device, method and application

Double-imaging method, device and application thereof

Security feature identification method and reflection type safety element film

Optical field display method and optical field display engine