Abstract: In an optical switch including an input block in which light is incident; an output block for transferring input light from the input block; and a reflector for performing a switching operation by reflecting input light from the input block, wherein the input block and the output block are arranged so as to make input light from the input block and reflected light reflected on the reflector and transferred to the output block have an acute angle less than 90 degrees, and accordingly an optical switch capable of simplifying an assembly process and a package process and reducing a size of an optical switch package can be provided.

Abstract: Disclosed is an optical switch which increases a transmission rate without using a mechanical driving method and does not generate optical loss. To this end, in the optical switch, incident light beam from a plurality of input ports is propagated to a plurality of output ports as it is or the light beam is diffracted through a Bragg grating, and the diffracted light beam is propagated to the plurality of output ports.

Abstract: High density near field optical recording/reproducing device, including a light source for emitting a bean of light, a converging lens for converging the light emitted from the light source, and a near filed light generating part formed of a material of which light transmittance is varied with light temperature sectors, thereby overcoming a limit of resolution coming from diffraction, whereby increasing a recording density, significantly.

Abstract: A spatial light modulation array, which is capable of controlling the diffraction characteristic of light in each portion in a substrate, a method for manufacturing the same, and a laser display device, which is capable of displaying an image regardless of mechanical reliability using the spatial light modulator in the form of an array are provided. The laser display device includes a lens for converting a laser beam oscillated by a light source into a one-dimensional slit beam, a spatial light modulation array for determining the diffraction degree of the slit beam according to the voltage applied to the pixel electrodes, diffracting the slit beam, and delivering the slit beam, a blocking portion for selectively transmitting the diffracted beam, a condensing lens for condensing the selectively transmitted beam, and a scanner for scanning the condensed beam to a screen.

Abstract: Etching method applicable to a semiconductor device fabrication and an MEMS(Micro-Electro-Mechanical System) process, including the steps of forming an etching mask on a substrate, forming a plurality of patterns in the etching mask corresponding to depths of the plurality of trenches; and etching the substrate using the etching mask having the plurality of patterns formed therein, whereby eliminating an alignment error in respective photolithography, that permits to form a precise structure, simplify a fabrication process, and reduce a production cost.

Abstract: An absolute humidity sensor for a microwave oven is disclosed. The absolute humidity sensor includes a silicon substrate, a humidity sensing element formed on a substrate, for detecting humidity exposed to the air, having a variable resistance value depending on the amount of the humidity, a temperature compensating element formed on the semiconductor, for compensating for the resistance value of the humidity sensing element, and a passivation film covered on the temperature compensating element, for shielding the humidity exposed to the air so as not to vary the resistance value of the temperature compensating element. The humidity sensing element and the temperature compensating element include an insulating film formed on the substrate, a humidity sensing film formed on the insulating film, for absorbing the humidity, and an electrode formed below the humidity sensing film or over/below the humidity sensing film.

Abstract: The present invention relates to an N×N OXC (optical cross-connect) optical switch of micro-mirrors, wherein an input optical fiber bundle is fitted to a first substrate of silicon or glass, and an output optical fiber is fitted to the first substrate at a distance from the input optical fiber bundle, to face each other. There are an input micro-mirror and an output micro-mirror part between the optical fiber input part and the optical fiber output part, at a distance from the input micro-mirror part to face each other, and at 45° to a direction of an optical path of a light from the input optical fiber bundle. For fixing them, the present invention employs a method, in which grooves are formed in the first substrate, in which the third substrates of the input/output micro-mirrors and the second substrates of the input/output optical fiber bundles are inserted.

Abstract: Light source module with two wavelengths including a first and a second laser diodes each for emitting a laser beam with a wavelength different from each other, and a submount formed between the first and second laser diodes having a vertical mirror surface vertical to bonding surfaces of the first and second laser diodes for reflecting laser beams from the first and second laser diodes in a same direction.

Abstract: Etching method applicable to a semiconductor device fabrication and an MEMS(Micro-Electro-Mechanical System) process, including the steps of forming an etching mask on a substrate, forming a plurality of patterns in the etching mask corresponding to depths of the plurality of trenches; and etching the substrate using the etching mask having the plurality of patterns formed therein, whereby eliminating an alignment error in respective photolithography, that permits to form a precise structure, simplify a fabrication process, and reduce a production cost.

Abstract: A different wavelength type of optical source module which generates light beams different in wavelength. In the optical source module, laser diodes are provided to be opposed to each of reflective films which is arranged to make a shape of a mountain. These respective laser diodes generates laser light beams different in wavelength. The light beams generated at the laser diodes are reflected by the reflective films at a right angle to progress along the same path.

Abstract: An annular shutter mirror which can selectively shut off a part of light beams progressing toward a target in the progressing direction thereof. The annular shutter mirror utilizes a fixed reflection face to reflect an incident light beam at a constant angle in accordance with an incident angle of the incident light beam. Around the periphery of the fixed reflection face, at least one flexible reflection face is formed in a shape of annular band. This at least one flexible reflection face selectively reflects an incident light beam at an angle different from a reflective angle of the fixed reflection area in accordance with an application condition of an electrical field.

Abstract: A health self-checking system using a remote controller and a television and a method thereof, capable of easily checking a user's health using a remote controller and a television by checking user's heart rate and R-wave form, which includes a health checking information detection circuit provided in a remote controller for detecting a health checking information of a user; and a health checking information analyzing circuit provided in a television for receiving a health checking information outputted from the health checking information detection circuit and for analyzing the received health checking information and a medical data previously stored in a data base of the television and for displaying the analyzed information on the screen of a television.

Abstract: A microwave oven includes at least two sensors for detecting heat rays emitted from the food which is being heated, a signal processor for obtaining a precise surface temperature of food, irrespective of the deviation of distances between the sensors and food, using output signals from the sensors, and a controller for receiving the output signal of the signal processor to recognize the cooking status of the food and controlling the heating of the food in accordance with the recognized cooking status.

Abstract: A method for calculating a PMV for an air conditioning system having a body sensor and a temperature sensor includes the steps of sensing a thermal change a human body senses due to room air circulation using the body sensor, and converting the sensed thermal change into a digital value, sensing a room temperature using the temperature sensor, and converting the sensed room temperature into a digital value, assigning parameters according to human bodily activities and amount of clothes a man wears classified by seasons and times, and calculating a PMV by computing the value of thermal change converted into a digital value, the value of room temperature converted into a digital value, and the parameters.

Abstract: This invention relates to a method for automatic control of a microwave oven which can make precise cooking control available by classifying the cooking control into cases when cooking is completed below the boiling point of water, such as thawing or warming up, and cases when cooking is completed above the boiling point of water. For types of cooking which are complete without water boiling, the invention sets the initial cooking time period by determining the time it takes for the output voltage of a temperature detection sensor to reach a rise starting point. For types of cooking which include water boiling, the invention sets the initial cooking time period by determining the time it takes for the output voltage of the temperature detection sensor to reach a maximum rise point. The invention then sets an additional time period equivalent to the initial time period multiplied by a cooking constant corresponding to the type of cooking that is desired.