baber/WOPTO huggingface dataset:
Patent KR-20000015903-A (KR)
Title: Method and apparatus for providing diversity in hard handoff for a cdma system
Inventor: TIEDEMANN EDWARD G JR
IPC: H04B7/02
Filed: 1997-05-22
Abstract: PURPOSE: Disclosed is an apparatus and method having a first base station measuring a round trip delay of a first active communication signal in order to identify that a remote unit is located within a second coverage area. CONSTITUTION: In a communications network, a network user communicates using a remote unit (125) with another user (30) via at least one base station (B1A). The communications network has a first base station (B1A) having a first coverage area and a second base station (B2A) having a second coverage area. In the situation where communication is not established between the second base station (B2A) and the remote unit (125), in order to provide communication between the remote unit (125) and the first base station (B1A) when the remote unit (125) is in the first coverage and simultaneously in the second coverage area, the first base station (B1A) produces a first active communication signal as intended for the remote unit (125). The first base station transmits the first active communication signal from a first antenna (130). The base station delays the first active communication signal to produce a first delayed active communication signal and transmits it from a second antenna (135) wherein the second antenna (135) is oriented with respect to the first antenna (130) such that the first active communication signal and the first delayed active communication signal fade independently as perceived by the remote unit.
Patent KR-20000055771-A (KR)
Title: Geosynthetic clay liner
Inventor: JEON HAN YONG
IPC: B32B27/00
Filed: 1999-02-10
Abstract: PURPOSE: A goesynthetic clay liner that can be applied on the sloped surfaces stably in the sanitary landfill is provided. This goesynthetic clay liner has improved tensile strength, durability, and reduces the amount of bentonite used for the site. CONSTITUTION: A goesynthetic clay liner according to the present invention comprises : (i) a top layer consisting of 500g/m¬2 or less of non woven fabric made of polypropylene single fiber of 10-15 denier ; (ii) a first bentonite layer consisting of powdery bentonite and aqueous adhesive beneath the top layer ; (iii) a middle layer made of non woven fabric beneath the first bentonite layer ; (iv) a second bentonite layer consisting of powdery bentonite and aqueous adhesive beneath the middle layer ; (v) a bottom layer made of filament split yarn having 5-10 denier.
Patent KR-19990072854-A (KR)
Title: 플라즈마디스플레이패널구동방법
IPC: G09G3/288
Filed: 1999-02-23
Abstract: 예비 방전이 모든 서브 필드에 제공되지는 않지만,  단축되어 끝날 경우,  서브 필드 사이의 동작 마진의 차이가 현저해진다는 새로운 사실에 주목하여,  동작 마진의 차이를 억제시킴으로써 플라즈마 디스플레이 패널을 위한 동작 마진을 향상시킨다. 
     단축된 예비 방전 시스템의 경우,  특히 유지 소거 특성의 유지 펄스 수에 대한 의존성이 현저해져서 결과적으로,  서브 필드 사이의 동작 마진 차이가 현저해지고,  따라서,  유지 소거 기간 동안 서브 필드의 소거 펄스에 대한 패러미터는 상기 동작 마진 차이를 억제하기 위해 각 서브 필드에 대한 유지 펄스 수 (발광 횟수) 에 따라서 설정된다.
Patent KR-19990072861-A (KR)
Title: 데이터통신시스템,데이터통신방법,데이터통신장치및디지털인터페이스
IPC: H04L12/40
Filed: 1999-02-23
Abstract: 소스 노드와 하나이상의 수신지 노드가 논리적으로 접속되고 그 논리적 접속 관계를 식별하는 접속 ID가 노드사이의 데이터 통신을 제어하기 위해 사용되는 통신 시스템 및 통신 프로톨에 관한 것이다.  또한, i번째(i는 임의의 정수)데이터를 송신하기 위한 시간과 (i+1)번째 데이터를 송신하기 위한 시간 사이의 최적의 시간 간격을 설정할 수 있는 효율적인 통신 시스템 및 통신 프로토콜에 관한다.  또한, i번째 데이터가 정상적으로 수신되지 않을 때, 수신 처리가 늦은 수신지 노드와 송신 처리가 빠른 소스 노드사이에서 재시도가 불필요하게 발생하는 것을 방지하기 위해 소정의 시간동안만 재시도가 금지되는 통신 시스템 및 통신 프로토콜에 관한다.
Patent KR-20000061135-A (KR)
Inventor: UEHARA SEIKICHI
IPC: C01F11/06
Filed: 1999-03-24
Abstract: PURPOSE: A method for obtaining a highly reactive liquid-slate slaked lime and liquid-slate slaked lime with fine and uniform grain size and large surface area. CONSTITUTION: The method comprises the steps of: adding calcined lime to water with the concentration of 20-35 weight% based on solid calcium hydroxide to hydrolyze the lime into a slaked lime emulsion; wet-crushing the slaked lime emulsion into a liquid-state slaked lime; fractionating the crushed lime emulsion to obtain a highly reactive liquid-state slaked lime, which has Ca(OH)2 20-35Wt%, precipitate volume over 85% after 6 hrs standing, Ca(OH)2 over 70Wt% in dry analysis, a grain size of D50 2-5micrometer, D90 20micrometer, and surface area of 25m2/g.
Patent KR-19990064533-A (KR)
Title: 대두,해조,새우를 이용한 식품 제조방법
Filed: 1999-04-02
Abstract: 대두에 필수 단백질인 메치오닌의 부족과 칼슘보다 인산이 많은 단점 그리고 과섭취시 요오드가 인체에서 빠져나가는 단점들을 다시마, 미역, 새우를 넣어 단점을 보충하므로 완전한 식품을 구성함에 있어 다시마, 미역(공정3) 35-40% + 새우(공정4) 10-12% + 다시마, 미역 삶은 물(공정1) + 전지분유 2-3% + 정제염 1-1.5% + 설탕 0.5-1% + 한천 0.5-1% 카라기난 0.1-0.2% + 아스코르빌 팔미데이트  0.05-0.1% + 탄력보강제, 착색료 등을 넣고 100℃에서 15-20분간 끓이는데 끝나기  3-5분전에 대두(공정5) 35-40% + 레시틴 3-5% + 조미료, 산미료, 향료를 넣고 끓인 다음 50-60℃에서 10-20분간 졸인 다음 35℃에서 셩형하여 30℃이하로 냉각 포장하여 3-5℃에서 저장하며 혹은 끓이는 초기에 찹살가루 5-3%를 추가하면서 한천과 카라기난을 모든 재료들과 같이 넣어 끓이지 않고 한천과 카라기난만의 100℃용액에  성형된 재료를 1-2분간 침지시켰다가 건져내어 냉각 포장하여 3-5℃에서 저장하는 방법으로 탄수화물, 필수지방산, 필수단백질, 무기질, 비타민, 알긴산등 등을 갖춘 식품으로 단독섭취나 산성식픔과 같이 섭취시 골다공증, 성인병, 콜레스테롤 예방과 산도를 중화시킬수 있는 효율적인 제조 방법으로 두부, 어묵, 소세지보다 더 많은 용도로 조리할 수 있게 연한 제리와 같이 혹은 피막을 입히게 한 제품이다.
Patent KR-19990087960-A (KR)
Title: 비지속성메모리내의객체생성방법및장치
IPC: G06F12/06
Filed: 1999-04-24
Abstract: 비지속성 메모리 내에서 객체 생성 방법이 제공된다.  인스트럭션 코드 시퀀스로부터, 제 1 펑션을 수행하도록 하는 제 1 인스트럭션 코드가 독출되는데, 이 제 1 펑션은 생성될 다음 객체에 대한 로케이션으로서 비지속성 메모리를 선택한다.  이 객체 생성은 제 2 인스트럭션 코드를 독출함으로써 수행되는 제 2 펑션의 실행에 의해 실행된다.  또한 본 발명에 따르면, 과도 객체에 대한 포인터를 스택 메모리 내에 저장하고 이 포인터를 지속성 메모리에 기록하거나 지속성 메모리로부터 독출하기 위한 메카니즘을 제공하는 것이 제안된다.
Patent KR-20000067613-A (KR)
Inventor: PARK JEONG GI
IPC: C08J5/18
Filed: 1999-04-30
Abstract: PURPOSE: A polyacrylonitrile ionomer polymer electrolyte increased in compatibility between a host polymer and a plasticizer and improved in good ionic conductivity, mechanical property and surface stability with an electrode by synthesizing a copolymer of acrylonitrile, itaconic acid alkali salts or maleic acid alkali salts and introducing an ionic group to a host polymer when it is used as a host polymer of a polymer electrolyte and process for preparation thereof are provided which can be used for polymer electrolyte material for lithium polymer secondary battery. CONSTITUTION: Acrylonitrile, itaconic acid or a maleic acid monomer are reacted with an initiator in water as a solvent to give a copolymer of formula (I), which is neutralized using an alkali metal hydroxide aqueous solution to give a polyacrylonitrile ionomer of formula (II), which is melted in dimethyl formamide as a cosolvent with a plasticizer and a lithium salt in a weight ratio of 1 : 1 : 0.1 to 1 : 9 : 2 to give the final product. In formula, M represents Li, Na or K and x represents a mol% of itaconic acid. Potassium persulfate and sodium bisulfite as an initiator are added to each monomer in an amount of 0.3 to 0.7 mol%.
Patent KR-19990068625-A (KR)
Title: 숯분말이내장된소파
IPC: A47C27/00
Filed: 1999-06-07
Abstract: 본 발명은 숯 분말이 내장된 소파에 관한 것으로, 특히 장기간 소파를 사용시 시트가 오염되는 것을 방지하며 시트의 오염으로 인한 각종 병원균의 잔류를 억제하고 아울러 소파를 사용하는 사용자로 하여금 쾌적한 환경을 제공할 수 있는 숯 분말이 내장된 소파에 관한 것이다. 
     상기 본 발명은 통상의 소파에 있어서, 쿠션재(25)에 안착 고정되는 숯 분말(23)이 내장된 키기가 동일 또는 상이한 적어도 하나의 패드(21)가 형성되는 것을 특징으로 한다. 
     상기 본 발명에서는 쿠션재와 커버 사이에 숯 분말을 내장한 패드를 삽입시킨 시트를 형성하여 장기간 소파를 사용시 소파에서 발산되는 악취를 제거할 수 있고, 또한 장마철 등에 습기에 의해 시트가 눅눅해지는 것을 미연에 방지하여 사용자로 하여금 소파 사용시 항상 쾌적한 환경을 제공해 줄 수 있는 이점이 있다.
Patent KR-20000006087-A (KR)
Inventor: SEKINE CHOGO
IPC: G01S7/298
Filed: 1999-06-10
Abstract: PURPOSE: A three dimensional display radar is provided to display an object selectively with distance marker on the base of a certain time. CONSTITUTION: The radar comprise sending/receiving part seizing the direction signal, distance signal, sensitivity signal to the target, display part, memory for display including memory cells corresponding to each pixel of the display, reading the data registered at the memory and sending the data red to the display, two dimensional coordinate transformer transforming the direction and distance signal to location value, two dimensional image memory memorizing the sensitivity signal as two dimensional image data in the memory cell pointed with the location value. three dimensional coordinate transformer which transforms the signals to location value and height of target, image controller selecting and sending the two and/or three dimensional image data to the memory for display.
Patent KR-20010003054-A (KR)
Inventor: CHOI DAE RIM
IPC: H01L29/786
Filed: 1999-06-21
Abstract: PURPOSE: A method for manufacturing a TFT(Thin Film Transistor) is provided to control a gate profile without additional etching process. CONSTITUTION: An aluminum layer is doped on an isolation substrate(10). A low resistance metal layer is formed on the aluminum layer. After etching the low resistance metal layer and the aluminum layer, a clad layer(12A) is deposited on the upper side of aluminum layer(11A). A gate(100) is comprised of the clad layer(12A) and the aluminum layer on the isolation substrate(10). The gate has a taper angle without breaking out a tip.
Patent KR-20010005115-A (KR)
Inventor: CHOI HYEONG SEOK
IPC: H01L21/76
Filed: 1999-06-30
Abstract: PURPOSE: A semiconductor device manufacturing method is provided to be capable of preventing abnormal breakdown in the junction region and reducing a leakage current at the cell junction region, thus improving the characteristic and reliability of devices. CONSTITUTION: A semiconductor device manufacturing method includes the following steps. A trench(17) is formed by etching a semiconductor substrate(11) using an insulating film pattern(15) exposing a portion, in which a device separation region will be formed, as an etch mask. After the surface of the trench goes through sacrificial oxidization process, implant process is performed using the insulating film pattern as an implant mask, thus forming a dislocation loop layer(19) for generating lattice defects at the bottom of the trench. A thermal oxide film and liner are then formed on the surface of the trench. Next, an insulating film filling the trench is formed on the structure. After the insulating film is made dense, it is flattened by chemical mechanical polishing process to thus form a device separation film. Then, the insulating film pattern is removed.
Patent KR-20010009327-A (KR)
Inventor: OH JIN SUK
IPC: B32B27/18
Filed: 1999-07-09
Abstract: PURPOSE: A polypropylene multilayered film comprising two kinds or more of mixtures on at least one side layer of the exterior and having a haze of more than 75% and a surface glossiness of less than 5.5 and process for producing the same are provided, which are reduced in die build-up at a T-die lip of a coextruder during production of a matt film and improved in ununiformity in thickness and breaking of a film. CONSTITUTION: The composite resin composition for matte laminated film is prepared by mixing 0.001 to 0.1 parts by weight of peroxide with 100 parts by weight of a base resin composition comprising 30 to 70% by weight of homopolypropylene having a melt index of 5 to 30g/10min and 70 to 30% by weight of high density polyethylene having a melt index of 0.01 to 1g/10min directly or in a master batch form and adding 0.001 to 0.5 part by weight of an antioxidant and a 0.001 to 0.2 part by weight of a lubricant.
Patent KR-20010009379-A (KR)
Inventor: YANG SUNG CHANG
IPC: F21V17/04
Filed: 1999-07-09
Abstract: PURPOSE: A fluorescent lamp shade is provided to prevent weakening of adhering force by installing a magnetic fixture including a magnet and a magnet case to a lamp shade. CONSTITUTION: A lamp shade has holes(2b) in reflecting planes(12,13,14,15,12',13',14',15') for being engaged with a fixture(5). The hole is formed in the central part of the lamp shade, and the hole(2b) is biased from the central part of the lamp shade. The lamp shade is made of an aluminium plate having a thickness of 0.5mm. The reflecting planes include two symmetrical sets of planes(12,13,14,15) and planes(12',13',14',15'). The planes(15,15') have an angle of 207 degrees, the planes(15,14) have an angle of 138.5 degrees, the planes(14,13) have an angle of 174 degrees, the planes(13,12) have an angle of 171 degrees, and the planes(12,11) have an angle of 255 degrees. The fixture(5) includes a magnet and a magnet case to fix a fluorescent lamp with magnetic force.
Patent KR-20000022675-A (KR)
Title: Automatic location determination of devices under test
Inventor: SERVE HASHENI RAJAN
IPC: G06F11/24
Filed: 1999-07-26
Abstract: PURPOSE: Deciding the location of a device under test is provided to track all assembly process of the DUT at the burning rack which allows the maximum usage of the space at the burning rack. Also it is provided to reduce the waiting time and by the easy track of DUT allows the increase the delivery for the massive order. CONSTITUTION: A burning rack testing device comprises a burning rack(10), and an SNMP switch device(18). The burning rack(10) is divided into working cell(12) by vertical line(14) and a horizontal line(16). The SNMP switch device(18) is located near the rack and has several port(P). The port is connected to the computer system or DUT which are indicated as M at each of the working cell by the cable(C). The other port connects the switch device to the monitor(R) and to the data base(DB). The burning rack has two sides, A and B, and the sides A and B comprises 45 working cells.
Patent KR-20010016842-A (KR)
Inventor: CHOI HYEON CHANG
IPC: H01J9/24
Filed: 1999-08-04
Abstract: PURPOSE: A neck fusing apparatus is provided to correctly maintain target height between a neck and a funnel while uniformly maintaining quality of a fused portion. CONSTITUTION: A neck fusing apparatus a funnel loading section(10) for a funnel(14), a neck transport section and a burner(18). The neck transport section transports a neck(13) to have the same axis as the funnel(14) loaded to the funnel loading section(10). The burner(18) heats a contact portion of the neck(13) and the funnel(14). A column(12) is erected at one side of the funnel loading section(10). The edge of the column(12) is coupled with a fixing section(30) radially fixed about the longitudinal direction of the column(12). The fixing section(30) has a longitudinally extended vertical arm(25). An elevation driving unit(22) is installed under the vertical arm(25). The elevation driving unit(22) has a chucking member(20) for chucking the neck(13) and elevated upward and downward in a central area of the elevation driving unit(22). A servo motor(23) is arranged over the chucking member(20) to control the elevation height of the chucking member(20). The elevation driving unit(22) has the edge shaped as a rail and is coupled with a burner driving unit(29) for rotating the burner(18).
Patent KR-20000047462-A (KR)
Inventor: JUJODAKESI
IPC: H01J29/76
Filed: 1999-08-19
Abstract: PURPOSE: An apparatus for compensating atmospheric magnetism and a cathode ray tube display device is provided to perform various compensations such as position, convergence, automatically. CONSTITUTION: An apparatus for compensating atmospheric magnetism and a cathode ray tube display device includes a deflection yoke(13), a convergence compensation coil(14), a landing compensation coil(15), a cathode ray tube(16), a magnetism sensor(2), a manipulator(6) and drive circuits(10,11,12). The cathode ray tube(16) includes the deflection yoke(13), the convergence compensation coil(14) and the landing compensation coil(15). The magnetism sensor(2) detects the vertical component of the atmospheric magnetism. The manipulator(6) determines first thru third parameters according to the detection signal. The drive circuits(10,11,12) supplies current to the deflection yoke(13), the convergence compensation coil(14) and the landing compensation coil(15) according to each of the parameters.
Patent KR-20010026106-A (KR)
Inventor: CHA JUNG JIN
IPC: A47C27/00
Filed: 1999-09-03
Abstract: PURPOSE: A cushion seat is provided to promote the health of a user as jade is exposed to be contacted to the skin of the user, so that a finger-pressure treatment is also possible. CONSTITUTION: A seat comprises a cushion layer(1), a skin layer(3), a fixing groove(4), jade(5) and a hot-wire(6). The cushion layer is made of sponge and etc. The skin layer is bonded on the upside of the cushion layer by an adhesive layer(2). The fixing groove is depressed to be formed a press, and the jade and stone are fixed in the fixing groove by an adhesive(2a). The hot-wires are formed in the inside of the cushion.
Patent KR-20010027673-A (KR)
Inventor: KIM HEON CHEOL
IPC: G11C29/00
Filed: 1999-09-15
Abstract: PURPOSE: A memory test in a semiconductor device with built in a memory and a recovery method for a defect cell(s) are provided to reduce the time required for detecting a defect memory cell existing in a memory and restoring the defect memory by testing a row redundancy together with a column redundancy when a BIST for detecting a defect cell(s) existing in the memory is performed. CONSTITUTION: The test and method include eight steps. The first step is to perform the BIST for all of the memory including the memory, the row and column redundancy. The second step is to detect a defect cell(s) existing in the entire memory. The third step is to finish the test for the memory when a defect(s) is not detected in the second step. The fourth is to judge whether the defect cell(s) existing to the memory is replaced with the row and column redundancy or not by performing BISR when the defect cell(s) is detected in the second step The fifth step is to judge the memory as a defect memory which restoration is impossible and then stop the test when it is impossible that the defect cell(s) existing in the memory is replaced with the row and column redundancy. The sixth step is to designate a row or a column redundancy to replace the defect cell(s) by performing the BISR when the defect cell(s) existing in the memory is replaced with the row and column redundancy. The seventh step is to replace the defect cell(s) with the row and column redundancy designated in the sixth step and then restore the defect with a hardware method. The eighth step is to perform the BIST for a memory which the defect is restored.
Patent KR-20000028702-A (KR)
Inventor: UMETA MAKOTO
IPC: B63B7/08
Filed: 1999-09-21
Abstract: PURPOSE: A compact gas generator is provided to fill gas into an emergency refuge appliance when an accident occurs. CONSTITUTION: A gas generator contains a gas generator body(1), a gas cartridge(6) arranged in the body, a needle(9) being opposite to the gas cartridge in the body, a slider(7) sliding into the body, a movable sphere pin(8) inserted into a recessed part(11) through an opening(4) to keep the slider in a stopping position, a pulling rope(5) having a handle(16) connected to the movable sphere pin for separating the pin from the recessed part of the slider, and a spring pressing the slider to the stopping position. When putting on a safety vest attaching the gas generator body and pulling the handle of the rope, the thin film of a neck part is broken and gas is automatically injected into the safety vest through a gas discharging member(10) to give buoyancy to the vest.
Patent KR-20010038956-A (KR)
Inventor: CHO CHEOL HUI
IPC: B63B22/00
Filed: 1999-10-28
Abstract: PURPOSE: A buoyancy apparatus for underwater working is provided to prevent the volume of a buoyancy tank from being changed and control buoyancy, thereby preventing the explosion of the buoyancy tank. CONSTITUTION: A buoyancy apparatus(1) for underwater working includes a buoyancy tank(10) made of steel materials for forming an airtight space(12) inside, and a pipeline installed to inject air and water into the buoyancy tank, wherein the buoyancy tank includes a metal pipe(11) opening both sides, and a side plate sealing both sides of the metal pipe, and the pipeline includes an air injecting pipe(20) installed to communicate with the buoyancy tank for injecting air inside, a drain pipe(30) extended from the outside of the buoyancy tank to the inside of the buoyancy tank for draining inside water to the outside, valves(21,31) opening and shutting off the passages of the air injection pipe and the drain pipe, and a pub piece(40) formed at the outer end part of the drain pipe for flowing air and water into the buoyancy tank.
Patent KR-20000000489-A (KR)
Inventor: PARK HAN KYUNG
IPC: A23B7/00
Filed: 1999-10-28
Abstract: PURPOSE: A shipping goods processing method of a cultivated mushroom is provided to preserve for a long time without being changed in the quality of the goods. CONSTITUTION: A shipping goods processing method of a cultivated mushroom comprises the steps of: washing with spraying water through a watering nozzle(2) as transferring with putting a mushroom(M) on a conveyer belt(1); fumigating with steam for 1-2min. as passing through (3) with high temperature, high pressure steam; quick-cooling for 5-10sec with soaking in a cool water container(4) at 2-5°C; removing moisture; and airtight wrapping with putting in a box.
Patent KR-20000029409-A (KR)
Inventor: OTA YOSHIHARU
IPC: H01L21/00
Filed: 1999-10-29
Abstract: PURPOSE: A process system is provided to reduce load of conveyor since an object for being processed is carried in and out by separate conveyor, and is conveyed and processed in one direction according to a process part arranged sequentially. CONSTITUTION: A plurality of rectilinear convey paths(7-12) are arranged between a carrying-in part(2) and a carrying-out part(3). Processor parts(13-18) are arranged between the carrier paths(7-12) to perform different processes to a glass substrate. A carrier(19) movably arranged on the convey path(7-12), is carrying in and out of an object for being processed between the process parts(13-18). Each process part has a plurality of process units(SCR, HP, COL, CT, HP, COL) according to each carrier path(7-12).
Patent KR-20010045956-A (KR)
Inventor: CHO GYE CHEOL
IPC: H04W88/08
Filed: 1999-11-09
Abstract: PURPOSE: A method for operating variably base station formation is provided to operate and maintain variably the base system according to the service environments, thereby enhancing the system operating function, optimizing of service regions and enhancing quality of the telephone call. CONSTITUTION: PLD(Program Loading Data) of the base station is received from the BSM(Base Station Management) system and then the source database of base station is constituted according to the formation of base station operation by the command of an operator and initialized(ST13). Thereafter, when a source allocation of the base station is required by attempting a call of a mobile station, the attempted Access_FA is changed into walsh code DB FA in order to access walsh code(air source) database(ST15). Also, walsh code capable of allocating is searched on the basis of walsh code DB FA as a key. If there is an allocatable walsh code, an allocation is performed(ST16). Thereafter, the call attempted Access_FA is changed into DB_FA in order to access a calling channel data access(ST17). Thereafter, a calling channel database is searched on the basis of the DB_FA as a key. As a result, if there is an allocatable TCE(Traffic Channel Element), TCE is allocated(ST18).
Patent KR-20010046870-A (KR)
Title: Focusing method for an imaging apparatus
Inventor: RIURI-QUO
IPC: H04N5/232
Filed: 1999-11-16
Abstract: PURPOSE: A focusing method of an image apparatus is provided, which can obtain a satisfactory focusing as being convenient to a user. CONSTITUTION: An image having a specific directionality and period is generated in an image apparatus(10), and the image is photographed with a CCD vidicon(20). And the image apparatus is focused according to an interference band shown on a monitor(30) of the CCD vidicon. The image comprises a plurality of horizontal bands and vertical bands separated equally. The horizontal and vertical bands are distributed on a center, and the length thereof becomes reduced as approaching to the center. The image apparatus is focused by controlling a clearance of the interference band.