Abstract: According to an embodiment, a holographic image sensor comprises a lens focusing object light incident from outside of the holographic image sensor to the holographic image sensor, a filter transmitting a predetermined wavelength band of light of the focused object light, a light receiving unit receiving interference light to sense a holographic image, and a reference light source directly emitting reference light having the predetermined wavelength band to the light receiving unit.

Abstract: According to an embodiment, a holographic microscope comprises a light source emitting light to an object, a beam splitter reflecting the light emitted from the light source to the object and transmitting object light reflected from the object, a holographic image sensor sensing information, including a holographic image, by receiving the object light and allowing the object light to coherently interfere with reference light, and an image processor obtaining three-dimensional (3D) information about the object based on the information sensed by the holographic image sensor. The holographic image sensor includes a lens focusing the object light to the holographic image sensor, a filter transmitting a predetermined wavelength band of light of the focused object light, a light receiving unit receiving interference light to sense a holographic image, and a reference light source directly emitting the reference light having the predetermined wavelength band to the light receiving unit.

Abstract: This disclosure relates to a digital holographic microscope which is robust to an external environment. According to an aspect of the present embodiment, there is provided an optical system for a digital holographic microscope, the optical system including a beam splitter which reflects a light radiated from a light source toward an object, or passes a light reflected from and traveling from the object; an objective lens focusing the light reflected by the beam splitter on the object; a transflective mirror which is located on the surface of the objective lens and is determined to be transparent or reflective depending on a polarization direction of a light incident to the transflective mirror; and a wave plate which converts the light passing through the beam splitter into a circularly polarized light.

Abstract: According to an embodiment, a holographic microscope comprises a light source, an optical system splitting light emitted from the light source into an object and a reflective mirror and inducing interference between light reflected by the object or transmitted through the object and light reflected by the reflective mirror, a first image sensor receiving the interference light and sensing interference information for the interference light, a second image sensor receiving the light reflected by the object or transmitted through the object and sensing information for the received light, and an image processor deriving a shape of the object based on the interference information sensed by the first image sensor and the information sensed by the second image sensor.

Abstract: This disclosure relates to a glasses-type augmented reality apparatus, and system with compact dimensions. An aspect of the present embodiment provides an augmented reality apparatus which provides a wearer with a digital holographic image incident from the outside as a holographic image, the apparatus including a plurality of holographic optical elements (HOEs) arranged in the form of concentric circles having different radii inside an optical configuration worn by the wearer to diffract the incident digital holographic image and provide the diffracted digital holographic image to the wearer.

Abstract: This disclosure relates to a digital holographic microscope which is robust to an external environment. According to an aspect of the present embodiment, there is provided an optical system for a digital holographic microscope, the optical system including a beam splitter which reflects a light radiated from a light source toward an object, or passes a light reflected from and traveling from the object; an objective lens focusing the light reflected by the beam splitter on the object; a transflective mirror which is located on the surface of the objective lens and is determined to be transparent or reflective depending on a polarization direction of a light incident to the transflective mirror; and a wave plate which converts the light passing through the beam splitter into a circularly polarized light.

Abstract: According to an embodiment, a holographic microscope comprises a light source, an optical system splitting light emitted from the light source into an object and a reflective mirror and inducing interference between light reflected by the object or transmitted through the object and light reflected by the reflective mirror, a first image sensor receiving the interference light and sensing interference information for the interference light, a second image sensor receiving the light reflected by the object or transmitted through the object and sensing information for the received light, and an image processor deriving a shape of the object based on the interference information sensed by the first image sensor and the information sensed by the second image sensor.

Abstract: According to an embodiment of the disclosure, a system for controlling an emergency bell based on sound comprises an emergency bell device installed in a crime area, gathering sound information generated in the crime area, detecting an emergency event from the gathered sound information, and generating an emergency bell operation signal, an analysis server receiving, in real-time, the sound information from the emergency bell device if the emergency bell operation signal is received, classifying per-time key sound sources in the sound information, and providing a situation analysis result on whether a crime occurs using the classified per-time key sound sources, and a control server receiving the situation analysis result and providing on-site dispatch information or situation response information to a security terminal in charge of the crime area based on the received situation analysis result.

Abstract: According to an embodiment, an augmented reality optical device comprises a light source unit including a plurality of light sources and outputting a plurality of light beams having different light paths, a display element receiving the light beams from the light source unit and reflecting augmented reality images, a reflector reflecting the light beams output from the light source unit and transmitting the augmented reality images reflected by the display element, a beam splitter reflecting the augmented reality images transmitted through the reflector and transmitting real-world light to a user's eye, and a controller controlling the light source unit and the display element.

Abstract: According to an embodiment, a holographic microscope comprises a light source emitting light to an object, a beam splitter reflecting the light emitted from the light source to the object and transmitting object light reflected from the object, a holographic image sensor sensing information, including a holographic image, by receiving the object light and allowing the object light to coherently interfere with reference light, and an image processor obtaining three-dimensional (3D) information about the object based on the information sensed by the holographic image sensor. The holographic image sensor includes a lens focusing the object light to the holographic image sensor, a filter transmitting a predetermined wavelength band of light of the focused object light, a light receiving unit receiving interference light to sense a holographic image, and a reference light source directly emitting the reference light having the predetermined wavelength band to the light receiving unit.

Abstract: According to an embodiment, a holographic image sensor comprises a lens focusing object light incident from outside of the holographic image sensor to the holographic image sensor, a filter transmitting a predetermined wavelength band of light of the focused object light, a light receiving unit receiving interference light to sense a holographic image, and a reference light source directly emitting reference light having the predetermined wavelength band to the light receiving unit.

Abstract: Disclosed is a spatial property measurement device or color implementation property of a holographic image. According to an aspect of the present embodiment, a spatial property measurement device or color implementation property of a holographic image reproduced by a holographic display device is provided.

Abstract: According to an embodiment, there is provided a reflector reflecting an immersive image output from a projector to a screen to allow a viewer to recognize the immersive image. The reflector comprises a central portion that is flat within a predetermined range with respect to a center of the reflector and a curved portion having a curvature out of the predetermined range.

Abstract: According to an embodiment, an image projection device outputting an image to a screen comprises an input unit receiving an image from an outside, a sensor unit sensing a viewer's position and gaze direction, a controller correcting the received image into a preset model based on the viewer's position and gaze direction sensed by the sensor unit, and an output unit outputting the preset model.

Abstract: According to an embodiment, an augmented reality optical device comprises a light source unit including a plurality of light sources and outputting a plurality of light beams having different light paths, a display element receiving the light beams from the light source unit and reflecting augmented reality images, a reflector reflecting the light beams output from the light source unit and transmitting the augmented reality images reflected by the display element, a beam splitter reflecting the augmented reality images transmitted through the reflector and transmitting real-world light to a user's eye, and a controller controlling the light source unit and the display element.

Abstract: According to an embodiment, an image projection device outputting an image to a screen comprises an input unit receiving an image from an outside, a sensor unit sensing a viewer's position and gaze direction, a controller correcting the received image into a preset model based on the viewer's position and gaze direction sensed by the sensor unit, and an output unit outputting the preset model.

Abstract: According to an embodiment, a holographic microscope comprises a light source, an optical system splitting light emitted from the light source into an object and a reflective mirror and inducing interference between light reflected by the object or transmitted through the object and light reflected by the reflective mirror, a first image sensor receiving the interference light and sensing interference information for the interference light, a second image sensor receiving the light reflected by the object or transmitted through the object and sensing information for the received light, and an image processor deriving a shape of the object based on the interference information sensed by the first image sensor and the information sensed by the second image sensor.

Abstract: According to an embodiment of the disclosure, a system for controlling an emergency bell based on sound comprises an emergency bell device installed in a crime area, gathering sound information generated in the crime area, detecting an emergency event from the gathered sound information, and generating an emergency bell operation signal, an analysis server receiving, in real-time, the sound information from the emergency bell device if the emergency bell operation signal is received, classifying per-time key sound sources in the sound information, and providing a situation analysis result on whether a crime occurs using the classified per-time key sound sources, and a control server receiving the situation analysis result and providing on-site dispatch information or situation response information to a security terminal in charge of the crime area based on the received situation analysis result.

Abstract: Provided is an image display apparatus using a transflective electro-optic device. When a tiled large-screen image display apparatus using a plurality of flat panel displays is implemented, light emitted in two directions may be combined using the transflective electro-optic device. Accordingly, it is possible to effectively remove a visual obstacle caused by the frames of the plurality of flat panel displays, increase the degree of visual immersion, and also enable minimization of the volume of the image display apparatus and modularization of the same.

Abstract: Provided is an image display apparatus using a transflective electro-optic device. When a tiled large-screen image display apparatus using a plurality of flat panel displays is implemented, light emitted in two directions may be combined using the transflective electro-optic device. Accordingly, it is possible to effectively remove a visual obstacle caused by the frames of the plurality of flat panel displays, increase the degree of visual immersion, and also enable minimization of the volume of the image display apparatus and modularization of the same.