Patent application number | Description | Published |
20090109512 | MEMS SCANNER HAVING ACTUATOR SEPARATED FROM MIRROR - A microelectromechanical systems (MEMS) scanner is provided. The MEMS scanner includes: a stationary frame; a first movable stage disposed inside the stationary frame and suspended on the stationary frame so as to pivot and vibrate around a virtual center shaft; a second movable stage disposed inside the first movable stage and suspended on the first movable stage so as to pivot and vibrate around the center shaft; and an actuator providing a driving force used to pivot and vibrate the first movable stage. | 04-30-2009 |
20100163889 | OPTICAL MODULATOR WITH PIXELIZATION PATTERNS - Provided is an optical modulator having pixelization patterns. The optical modulator includes an optical-electric (O-E) conversion element converting input optical images to current signals using the photoelectric effect, and an electric-optical (E-O) conversion element that emits light using the current signals transferred from the O-E conversion element. Trenches are formed from at least a surface of the optical modulator to a predetermined depth in the optical modulator so as to block or reduce electrical interference between pixels when the electric signals are transferred from the O-E conversion element to the E-O conversion element. | 07-01-2010 |
20100177372 | OPTICAL IMAGE MODULATOR, OPTICAL APPARATUS INCLUDING THE SAME, AND METHODS OF MANUFACTURING AND OPERATING THE OPTICAL IMAGE MODULATOR - Disclosed are an optical image modulator, an optical apparatus including the same, and methods of manufacturing and operating the optical image modulator. The optical image modulator includes a light amount increasing unit increasing the amount of forward light emission of an electric-optical unit. The light amount increasing unit includes a first reflector reflecting light, which travels from the inside of the electric-optical unit toward the optical-electric unit, to the electric-optical unit. The light amount increasing unit may further include a second light reflector reflecting light, which passes through the optical-electric unit without optical-electric conversion, to the optical-electric unit. | 07-15-2010 |
20100182671 | OPTICAL IMAGE SHUTTER - An optical image shutter is disclosed. The optical image shutter includes an optical filter having a fixed refractive index and an optical filter having a variable refractive index. The optical filter having a fixed refractive index may include two layers having different refractive indexes and stacked alternately at least once. Alternatively, the optical filter having a variable refractive index may include at least one refractive index variable layer, and two layers having different refractive indexes and stacked alternately at least once. The optical image shutter may further include a transparent electrode for applying an electric field to the at least one refractive index variable layer. | 07-22-2010 |
20100304517 | MEMS DEVICE AND FABRICATION METHOD OF THE SAME - A microelectromechanical systems (MEMS) device includes a frame, an actuator formed on the same layer as the frame and connected to the frame to be capable of performing a relative motion with respect to the frame, and at least one stopper restricting a displacement of the actuator in a direction along the height of the actuator. The MEMS device is fabricated by bonding a second substrate to a first substrate, forming the frame and the actuator by partially removing the first substrate, and forming the at least one stopper by partially removing the second substrate. | 12-02-2010 |
20100308211 | OPTOELECTRONIC SHUTTER, METHOD OF OPERATING THE SAME AND OPTICAL APPARATUS INCLUDING THE OPTOELECTRONIC SHUTTER - An optoelectronic shutter, a method of operating the same, and an optical apparatus including the optoelectronic shutter are provided. The optoelectronic shutter includes a phototransistor which generates an output signal from incident input light and a light emitting diode serially connected to the phototransistor. The light emitting diode outputs output light according to the output signal, and the output signal is gain-modulated according to a modulation of a current gain of the phototransistor. | 12-09-2010 |
20100321755 | OPTICAL MODULATOR, METHODS OF MANUFACTURING AND OPERATING THE SAME AND OPTICAL APPARATUS INCLUDING THE OPTICAL MODULATOR - An optical modulator, methods of manufacturing and operating the same, and an optical apparatus including the optical modulator are disclosed. The optical modulator includes an electro-optical converter and an optical-electric converter, stacked perpendicular to a substrate, and a gate transistor. The gate transistor gates a signal transmitted to the electro-optical converter from the optical-electric converter and allows charges generated in the optical-electric converter and charges remaining in the electro-optical converter to flow while bypassing the electro-optical converter when gating ON is performed. | 12-23-2010 |
20100328750 | HIGH-SPEED OPTICAL MODULATOR AND METHOD OF MODULATING LIGHT BY USING THE SAME - Provided are a high-speed optical modulator and a method of modulating light by using the same. The optical modulator includes first and second resonance cavities that are sequentially stacked on a transparent substrate, wherein the first and second resonance cavities each include an electric-optical layer. According to the method, first and second voltages having different sizes are simultaneously applied respectively to the first and second resonance cavities, and then for the other configuration of the modulator mutually interchanged voltages are applied. | 12-30-2010 |
20110074659 | HIGH SPEED OPTICAL SHUTTER, METHOD OF OPERATING THE SAME AND APPARATUS INCLUDING THE SAME - A high speed optical shutter, a method of operating the high speed optical shutter, and an optical apparatus including the high speed optical shutter. The optical shutter includes a transparent electro-optical medium in an active solid state having a total internal reflection surface on which an angle of total internal reflection is changed by an external action. The transparent electro-optical medium may be a prism or a prism array whose angle of total internal reflection is changed by the external action. An incident light path changing unit may be further arranged in front of the transparent electro-optical medium. Also, a light path changing unit may be further arranged so as to allow light passing through the electro-optical medium to be perpendicularly incident on an incidence target object. | 03-31-2011 |
20110170160 | OPTICAL IMAGE SHUTTER AND METHOD OF MANUFACTURING THE SAME - An optical image shutter having a transparent electro-optical crystal formed on a transparent amorphous substrate and a method of manufacturing the optical image shutter. The light image shutter is created by forming a buffer layer using a material having a similar crystalline structure to an electro-optical crystal, on a transparent amorphous substrate such as glass, and forming an electro-optical thin film layer such as the electro-optical crystal on the buffer layer. | 07-14-2011 |
20110176709 | METHOD AND APPARATUS FOR CALCULATING A DISTANCE BETWEEN AN OPTICAL APPARATUS AND AN OBJECT - A method and apparatus for determining a distance between an optical apparatus and an object by considering a measured nonlinear waveform, as opposed to a mathematically ideal waveform. The method and apparatus may accurately calculate distance information without being affected by a type of waveform projected onto the object and may not require an expensive light source or a light modulator for generating a light with little distortion and nonlinearity. Further, since the method may be able to use a general light source, a general light modulator, and a general optical apparatus, additional costs do not arise. Furthermore, a lookup table, in which previously calculated distance information is stored, may be used, and thus the amount of computation required to be performed to calculate the distance is small, thereby allowing for quick calculation of the distance information in real time. | 07-21-2011 |
20110181936 | OPTICAL MODULATOR - Optical modulator having wide bandwidth based on Fabry-Perot resonant reflection is disclosed. The optical modulator includes: a bottom Distributed Bragg Reflector (DBR) layer; a top DBR layer including at least one layer, and a modified layer; and an active layer disposed between bottom and top DBR layers, wherein the at least one layer includes at least one pair of a first refractive index layer having a first refractive index and a second refractive index layer having a second refractive index, the modified layer includes at least one pair of a third refractive index layer having a third refractive index and a fourth refractive index layer having a fourth refractive index, the third and the fourth refractive indexes being different, and at least one of the third and the fourth refractive index layers has a second optical thickness that is not λ/4 or that is not an odd multiple thereof. | 07-28-2011 |
20120069176 | APPARATUS AND METHOD FOR GENERATING DEPTH IMAGE - An apparatus and method for generating a depth image are provided. The apparatus includes an optical modulator, an optical sensor, and a depth image processor. The optical modulator optically modulates light which is reflected from an object to which light modulated using a first pseudorandom (PN) sequence is irradiated. The optical modulator optically modulates the reflected light using second PN-sequences, where each of the second PN-sequences has a same PN sequence as the first PN-sequence, but the second PN-sequences have N different time shifts. The optical sensor senses the optically modulated reflective light. The depth image processor samples N intensity images from the optically modulated reflective light sensed by the optical sensor and generates a depth image of the object using the sampled N intensity images. | 03-22-2012 |
20120105594 | BEAM SPLITTER FOR 3D CAMERA, AND 3D IMAGE ACQUISITION APPARATUS EMPLOYING THE BEAM SPLITTER - A beam splitter and a 3D image acquisition apparatus including the beam splitter are provided. The beam splitter includes a light incident surface on which light having a first wavelength and light having a second wavelength are incident; a beam splitting surface which is inclined to the light incident surface and reflects the light having the first wavelength and transmits the light having the second wavelength; a first light exit surface through which the light having the first wavelength reflected from the beam splitting surface exits; a first reflective surface which reflects the light having the second wavelength transmitted by the beam splitting surface; a second reflective surface which reflects the light having the second wavelength reflected from the first reflective surface; and a second light exit surface through which the light having the second wavelength reflected from the second reflective surface exits. | 05-03-2012 |
20120140309 | OPTICAL IMAGE MODULATOR AND METHOD OF MANUFACTURING THE SAME - An optical image modulator and a method of manufacturing the same. The optical image modulator includes a substrate, an N electrode contact layer formed on the substrate, a lower distributed Bragg reflection (DBR) layer, a quantum well layer, an upper DBR layer, and a P electrode contact layer sequentially stacked on the N electrode contact layer, a P electrode formed on the P electrode contact layer, and an N electrode formed on the N electrode contact layer. The N electrode is a frame that surrounds the lower DBR layer. | 06-07-2012 |
20120147143 | OPTICAL SYSTEM HAVING INTEGRATED ILLUMINATION AND IMAGING OPTICAL SYSTEMS, AND 3D IMAGE ACQUISITION APPARATUS INCLUDING THE OPTICAL SYSTEM - An optical system including integrated illumination and imaging optical systems, and a 3-dimensional (3D) image acquisition apparatus including the optical system. In the optical system of the 3D image acquisition apparatus, the illumination optical system and the imaging optical system are integrated to have a coaxial optical path. Accordingly, there is no parallax between the illumination optical system and the imaging optical system, so that depth information about an object acquired using illumination light may reflect actual distances between the object and the 3D image acquisition apparatus. Consequently, the depth information about the object may be more precise. The zero parallax between the illumination optical system and the imaging optical system may improve utilization efficiency of the illumination light. As a result, a greater amount of light may be incident on the 3D image acquisition apparatus, which ensures to acquire further precise depth information about the object. | 06-14-2012 |
20120147147 | ILLUMINATION OPTICAL SYSTEM AND 3D IMAGE ACQUISITION APPARATUS INCLUDING THE SAME - An illumination optical system of a 3-dimensional (3D) image acquisition apparatus and a 3D image acquisition apparatus including the illumination optical system. The illumination optical system of a 3D image acquisition apparatus includes a beam shaping element which outputs light having a predetermined cross-sectional shape which is proportional to a field of view of the 3D image acquisition apparatus. The beam shaping element may adjust a shape of illumination light according to its cross-sectional shape. The beam shaping element may uniformly homogenize the illumination light without causing light scattering or absorption. | 06-14-2012 |
20120162197 | 3-DIMENSIONAL IMAGE ACQUISITION APPARATUS AND METHOD OF EXTRACTING DEPTH INFORMATION IN THE 3D IMAGE ACQUISITION APPARATUS - A 3 dimensional (3D) image acquisition apparatus and a method of extracting depth information in the 3D image acquisition apparatus are provided. The method of extracting depth information includes sequentially projecting N (N is a natural number equal to or greater than 3) different pieces of projection light onto a object; modulating N pieces of reflection light reflected from the object with an optical modulation signal having a gain waveform; generating N images by capturing the N pieces of modulated reflection light; generating a first averaged image by multiplying the N images by primary weights and generating a second averaged image by multiplying the N images by secondary weights; acquiring an average phase delay from the first and second averaged images; and calculating a distance to the object from the average phase delay. | 06-28-2012 |
20120162380 | OPTICAL MODULATOR USING MULTIPLE FABRY-PEROT RESONANT MODES AND APPARATUS FOR CAPTURING 3D IMAGE INCLUDING THE OPTICAL MODULATOR - An optical modulator that performs wide bandwidth optical modulation by using multiple Fabry-Perot resonant modes, and an apparatus for capturing a three-dimensional image including the optical modulator are provided. The optical modulator may include: a substrate; a first contact layer disposed on the substrate; a bottom distributed Bragg reflective (DBR) layer disposed on the first contact layer; an active layer disposed on the bottom DBR layer and includes a multiple quantum well layer; a top DBR layer disposed on the active layer; a cavity layer disposed in the top DBR layer; and a second contact layer disposed on the top DBR layer. Since the optical modulator achieves both a high contrast ratio and a wide bandwidth by using two or more Fabry-Perot resonant modes, the optical modulator may show a stable performance even when a resonant wavelength is changed during manufacture or due to an external environment such as temperature. | 06-28-2012 |
20120170097 | LIGHT MODULATORS AND OPTICAL APPARATUSES INCLUDING THE SAME - Provided are examples of light modulators and optical apparatuses that may include the light modulators. A light modulator may include a plasmonic nano-antenna and an element for changing plasmon resonance characteristics of the plasmonic nano-antenna. The plasmon resonance characteristics of the plasmonic nano-antenna may be changed due to a change in refractive index of the element, and thus light may be modulated. | 07-05-2012 |
20120300038 | PHOTONIC CRYSTAL TYPE LIGHT MODULATOR AND 3D IMAGE ACQUISITION APPARATUS EMPLOYING THE SAME - A photonic crystal type light modulator is provided. The photonic crystal type light modulator includes: a substrate; a first electrode disposed on the substrate; an active layer disposed on the first electrode, where an optical characteristic of the active layer changes according to application of an electric field; a second electrode disposed on the active layer; and a photonic crystal layer disposed on the second electrode and comprising a 2D grating. | 11-29-2012 |
20120314039 | 3D IMAGE ACQUISITION APPARATUS EMPLOYING INTERCHANGABLE LENS - A three-dimensional (3D) image acquisition apparatus is provided. The 3D image acquisition apparatus includes: an interchangeable lens unit comprising a lighting unit that irradiates light toward an object, a color image lens unit that forms a color image of the object, and a depth image capturing unit that comprises a depth image lens unit for obtaining depth image information relating to the object; and a main body comprising a first image sensor that converts an optical image formed by the color image lens unit into an electric signal and an image processor that forms a 3D image using the electric signal of the first image sensor and depth information of the depth image capturing unit, wherein the interchangeable lens unit is detachable from the main body. | 12-13-2012 |
20130101176 | 3D IMAGE ACQUISITION APPARATUS AND METHOD OF CALCULATING DEPTH INFORMATION IN THE 3D IMAGE ACQUISITION APPARATUS - A 3-dimensional (3D) image acquisition apparatus and a method of calculating depth information in the 3D image acquisition apparatus, the 3D image acquisition apparatus including: an optical modulator for modulating light reflected from a subject by sequentially projected N (N is 3 or a larger natural number) light beams; an image sensor for generating N sub-images by capturing the light modulated by the optical modulator; and a signal processor for calculating depth information regarding a distance to the subject by using the N sub-images. | 04-25-2013 |
20130170011 | TRANSMISSIVE IMAGE MODULATOR USING MULTI-FABRY-PEROT RESONANT MODE AND MULTI-ABSORPTION MODE - A transmissive image modulator for allowing image modulation over a wide bandwidth with multiple Fabry-Perot resonant modes and multiple absorption modes is provided. The transmissive image modulator includes a lower reflection layer; an active layer disposed on the lower reflection layer, including multiple quantum well layers and multiple barrier layers; an upper reflection layer disposed on the active layer; and at least one micro-cavity layer disposed in at least one of the lower and upper reflection layer. The active layer and the at least one micro-cavity layer have thicknesses of a multiple of λ/2, where λ is a resonant wavelength. | 07-04-2013 |
20130175500 | TRANSMISSIVE IMAGE MODULATOR INCLUDING STACKED DIODE STRUCTURE HAVING MULTI ABSORPTION MODES - A transmissive light modulator including a first reflection layer; a first active layer, arranged on the first reflection layer and including a plurality of quantum well layers and a plurality of barrier layers; a second reflection layer arranged on the first active layer; a second active layer, arranged on the second reflection layer and including a plurality of quantum well layers and a plurality of barrier layers; and a third reflection layer arranged on the second active layer, wherein the first reflection layer and the third reflection layer are each doped with a first type dopant, and the second reflection layer is doped with a second type dopant, which is electrically opposite to the first type dopant. | 07-11-2013 |
20130201183 | 3D IMAGE ACQUISITION APPARATUS AND METHOD OF EXTRACTING DEPTH INFORMATION IN 3D IMAGE ACQUISITION APPARATUS - A method for extracting depth information, which may include extracting depth information relating to an object by using an actual nonlinear waveform instead of a mathematically ideal waveform and simultaneously may include effectively removing errors due to random noises that may be caused in a light source, an light modulator, an imaging device, or the like, is provided. The method may include performing simple multiplex and addition on captured images and performing a search of a look-up table. Thus, correct distance information may be extracted without being affected by a type of waveform being used, and an amount of memory which is used and calculated for removing random noise may be reduced. | 08-08-2013 |
20130270418 | LARGE-AREA TRANSMISSIVE TYPE OPTICAL IMAGE MODULATOR AND METHOD OF MANUFACTURING THE SAME AND OPTICAL APPARATUS INCLUDING TRANSMISSIVE TYPE OPTICAL IMAGE MODULATOR - A large-area transmissive type optical image modulator, a method of manufacturing the same, and an optical apparatus including the transmissive type optical image modulator are provided. The large-area transmissive type optical image modulator includes: a base substrate; a first expitaxial layer formed on the base substrate; a second expitaxial layer formed on the first expitaxial layer; a first electrode formed on the first expitaxial layer and spaced apart from the second expitaxial layer; a second electrode formed on the second expitaxial layer; and a transparent substrate covering the second expitaxial layer and the second electrode, wherein the base substrate includes a through hole corresponding to a light emitting area, and the first expitaxial layer may include an n-type or p-type doping material. | 10-17-2013 |
20140034811 | OPTOELECTRONIC SHUTTER, METHOD OF OPERATING THE SAME AND OPTICAL APPARATUS INCLUDING THE OPTOELECTRONIC SHUTTER - An optoelectronic shutter, a method of operating the same, and an optical apparatus including the optoelectronic shutter are provided. The optoelectronic shutter includes a phototransistor which generates an output signal from incident input light and a light emitting diode serially connected to the phototransistor. The light emitting diode outputs output light according to the output signal, and the output signal is gain-modulated according to a modulation of a current gain of the phototransistor. | 02-06-2014 |
20140055565 | 3-DIMENSIONAL IMAGE ACQUISITION APPARATUS AND 3D IMAGE ACQUISITION METHOD FOR SIMULTANEOUSLY OBTAINING COLOR IMAGE AND DEPTH IMAGE - A 3-dimensional (3D) image acquisition apparatus capable of simultaneously obtaining a color image and a depth image in a single shooting operation is provided. The apparatus includes a light source for radiating illumination light having a predetermined wavelength onto an object; a lens unit having at least four object lenses; an image sensor including at least four sensing regions for individually receiving light focused by the object lenses and for generating images; and at least three optical shutters individually facing at least three of the at least four object lenses and for modulating incident light with predetermined gain waveforms. | 02-27-2014 |
20140063583 | INFRARED TRANSMISSION LARGE-AREA SHUTTER - An infrared transmission large-area shutter is provided. The infrared transmission large-area shutter includes a first contact layer on a substrate, a plurality of stacks formed in a two-dimensional (2D) array pattern on a first region of the first contact layer, each stack comprising a lower reflection layer, an active layer, an upper reflection layer, and a second contact layer which are formed sequentially in this order on the first contact layer, a first electrode formed on the first contact layer, a plurality of second electrodes on the second contact layers, a first polymer layer that surrounds sidewalls of the plurality of stacks on the first contact layer, and a second polymer layer, which is transparent to infrared rays, to cover the second electrode on the second contact layer. A through hole corresponding to the plurality of stacks is formed in the substrate. | 03-06-2014 |
20140098192 | IMAGING OPTICAL SYSTEM AND 3D IMAGE ACQUISITION APPARATUS INCLUDING THE IMAGING OPTICAL SYSTEM - An imaging optical system includes an objective lens configured to focus light having a first wavelength band and light having a second wavelength band, an optical shutter module configured to reflect the light having the first wavelength band, which is focused by the objective lens, without modulating the light having the first wavelength band and to modulate the light having the second wavelength band, which is focused by the objective lens, and reflect the modulated light having the second wavelength band, and an image sensor configured to respectively sense the light having the first wavelength band and the modulated light having the second wavelength band, which are reflected by the optical shutter module, and to output a first image signal with respect to the light having the first wavelength band and a second image signal with respect to the modulated light having the second wavelength band. | 04-10-2014 |
20140111620 | IMAGING OPTICAL SYSTEM FOR 3D IMAGE ACQUISITION APPARATUS, AND 3D IMAGE ACQUISITION APPARATUS INCLUDING THE IMAGING OPTICAL SYSTEM - An imaging optical system and a three-dimensional (3D) image acquisition apparatus which includes the imaging optical system are provided. The imaging optical system includes an object lens configured to transmit light; first and second image sensors having different sizes from each other; a beamsplitter on which the light transmitted by the object lens is incident, the beamsplitter being configured to split the light incident thereon into light of a first wavelength band and light of a second wavelength band, and to direct the light of the first wavelength band to the first image sensor and the light of the second wavelength band to the second image sensor; and at least one optical element, disposed between the beamsplitter and the second image sensor, configured to reduce an image that is incident on the second image sensor, the optical element including at least one of a Fresnel lens and a diffractive optical element. | 04-24-2014 |
20140185122 | LIGHT MODULATORS AND OPTICAL APPARATUSES INCLUDING THE SAME - Provided are examples of light modulators and optical apparatuses that may include the light modulators. A light modulator may include a plasmonic nano-antenna and an element for changing plasmon resonance characteristics of the plasmonic nano-antenna. The plasmon resonance characteristics of the plasmonic nano-antenna may be changed due to a change in refractive index of the element, and thus light may be modulated. | 07-03-2014 |
20140191196 | OPTICAL DEVICE INCLUDING THREE COUPLED QUANTUM WELL STRUCTURE - Provided is an optical device which includes an active layer which includes at least two outer barriers and at least one coupled quantum well, each of the at least one coupled quantum well is sandwiched between the at least two outer barriers. Each of the at least one coupled quantum well includes at least three quantum well layers and at least two coupling barriers interposed between the at least three quantum layers. The at least two coupling barriers have a potential energy which is higher than a ground level and is lower than energy levels of the at least two outer barriers. | 07-10-2014 |
20140300701 | 3D IMAGE ACQUISITION APPARATUS AND METHOD OF GENERATING DEPTH IMAGE IN THE 3D IMAGE ACQUISITION APPARATUS - Provided are a three-dimensional (3D) image acquisition apparatus, and a method of generating a depth image in the 3D image acquisition apparatus. The method may include sequentially projecting a light transmission signal, which is generated from a light source, to a subject, modulating reflected light, which is reflected by the subject, using a light modulation signal, calculating a phase delay using a combination of a first plurality of images of two groups, from among a second plurality of images of all groups obtained by capturing the modulated reflected light, and generating a depth image based on the phase delay. | 10-09-2014 |
20140347445 | 3D IMAGE ACQUISITION APPARATUS AND METHOD OF DRIVING THE SAME - Provided is a 3-dimensional (3D) image acquisition apparatus and a method of driving the same. The 3D image acquisition apparatus includes a light source, an optical shutter, an image sensor, an image signal processor, and a controller. The light source is configured to project illumination light on an object. The optical shutter is configured to modulate the illumination light reflected from the object with a predetermined gain waveform. The image sensor is configured to generate a depth image by detecting the illumination light modulated by the optical shutter. The image signal processor is configured to calculate a distance from the 3D image acquisition apparatus to the object using the depth image generated by the image sensor. The controller is configured to control an operation of the light source and an operation of the optical shutter. | 11-27-2014 |
20150054925 | OPTICAL MODULATOR AND 3D IMAGE ACQUISITION APPARATUS INCLUDING AN OPTICAL MODULATOR - An optical modulator and a 3D image acquisition apparatus including an optical modulator are provided. The optical modulator is disposed in a multiple quantum well including a plurality of quantum wells and a plurality of quantum barriers, and includes at least one carrier block disposed in the multiple quantum well restricting the carrier movement between the multiple quantum wells. | 02-26-2015 |