baber/WOPTO huggingface dataset:
Patent KR-20030034683-A (KR)
Title: eventful compression blower
Inventor: TAK BONG YUL
IPC: F04D25/16
Filed: 2001-10-26
Abstract: PURPOSE: A multistage compressing blower is provided to blow wind at regular pressure and discharge volume regardless of discharge distance, thereby promptly providing air. CONSTITUTION: First and second cap housings(4,5) have predetermined first and second space parts(2,3) while having first and second axial holes(4a,5a) in the center, and have flanges(20,21) having coupling holes(18,19). A plurality of partition parts(6,7,8) is formed between the first and second cap housings. First to fourth impellers(9-12) are connected to a rotary shaft(13) passing through the center of a space provided by inner surfaces of the first and second cap housings and inner surfaces of the partition parts.
Patent KR-20020041746-A (KR)
Inventor: KUMANO NAOMI
IPC: H04J14/02
Filed: 2001-10-29
Abstract: PURPOSE: To provide an optical fiber, which is capable of forming an optical transmission line for wavelength division multiplexing transmission of a wavelength 1.5 μm band, using a Raman amplifier. CONSTITUTION: The effective core sectional area, in at least part of the set wavelength band of the wavelength 1.5 μm band, is specified to 40 to 60 μm¬2; the dispersion value at a wavelength, of 1.55 μm to 4 to 10 ps/nm/km; the dispersion slope at the wavelength 1.55 μm band to a positive value smaller than 0.04 ps/nm¬2/km; the zero dispersion wavelength is set to < =1.4 μm; the cut-off wavelength is set at a length 2 m to < =1.5 μm and the bending loss at a diameter 20 mm in the wavelength 1.5 μm band to < =5 dB/m. The refractive index profile of the optical fiber is set with a specific refractive index difference Δ1 with respect to the reference layer 6 of the first glass layer 1 on, for example, the innermost layer and a specific refractive index difference Δ3 with respect to the reference layer 6 of the third glass layer 3 of the third place from the inner side being made positive, and a specific refractive index difference Δ2 with respect to the reference layer 6 of the second glass layer of the second place from the inner side is made negative.
Patent KR-20030035090-A (KR)
Title: Rotary treatment apparatus and method for treating a plate shaped object
Inventor: SHIMAI FUTOSHI
IPC: G03F7/16
Filed: 2001-10-30
Abstract: PURPOSE: Provided is a device for rotationally treating a plate substrate, which has a supporting member for maintaining the evenness of the substrate to obtain an uniform thickness. CONSTITUTION: The device comprises a suction chuck(13) disposed in a cup(3) for retaining and rotating the plate substrate to provide the liquid supplied to the surface of the substrate throughout the whole surface of the substrate. A supporting member(14) is disposed in the position outside of the suction chuck(13) to support the lower surface of the end of the substrate protruded from the suction chuck(13) from the bottom, while the plate is not rotated, so that the evenness of the substrate is maintained.
Patent KR-20020034936-A (KR)
Title: Combined water-wash and wet-compression system for a gas turbine compressor and related method
Inventor: CARBERG WILLIAM GEORGE
IPC: F01D25/00
Filed: 2001-10-31
Abstract: PURPOSE: A combined system for cooling by water injection and washing of a gas turbine compressor is provided to supply water drops for washing or wet compression by using dual function nozzles in a single system. CONSTITUTION: A hybrid washing and wet compression system for a gas turbine includes a compressor(44) having an inlet(40) defining the flow direction, and plural manifolds(38,40,42,52,54,56) arranged close to the inlet and arranged horizontally against the flow direction, plural dual function nozzles(46,48,50) connected to the manifolds. Each dual function nozzle is adapted to supply small droplets to the compressor selectively and relatively for intercooling, or collect relatively large droplets for impingement on components of the compressor for cleaning the components. Liquid is supplied into the inlet of the compressor for providing water for cleaning components of the compressor, for wet compression and for intercooling.
Patent KR-20030037332-A (KR)
Title: Method of compensation analog video signal noise of crystal liquid display device and circuit the same
Inventor: CHO GYU CHUN
IPC: G09G3/36
Filed: 2001-11-01
Abstract: PURPOSE: A method and a circuit for correcting an analog video signal noise of a liquid crystal display are provided to prevent the display quality from being deteriorated due to the analog signal noise by making the noise compensation. CONSTITUTION: In a method of compensating an analog video signal noise of a liquid crystal display, the first input signal with a graphic analog signal of red, green and blue is generated. The second input signal where the noise is made in proportion to the noise contained in the first input signal is generated while being separated from the ground potential. The first input signal is converted into a digital signal by way of an analog/digital converter(300) upon receipt of the first and the second input signals. The first input signal is a positive signal, and the second input signal is a negative signal.
Patent KR-20030038899-A (KR)
Title: A device and the method for improve the amount of fuel consumed controlling of diesel engine
Inventor: SHIN U JIN
IPC: F02D41/38
Filed: 2001-11-07
Abstract: PURPOSE: An apparatus and a method are provided to achieve improved fuel efficiency and reduce smoke by controlling the maximum fuel limit in accordance with the operation of the selection switch. CONSTITUTION: An apparatus comprises a vehicle operating state detection unit(100); an engine control unit(200) for outputting a predetermined control signal to the vehicle operating state detection unit, receiving information including a vehicle speed, degree of opening of accelerator pedal and engine RPM, setting a maximum fuel limit by using the fuel limit setting map, re-controlling the maximum fuel limit in accordance with the operation of the load selection switch, and outputting the corresponding maximum fuel limit control signal; and a driving unit(300) for controlling engine output by controlling the maximum fuel limit by being synchronized with the maximum fuel limit control signal output from the engine control unit.
Patent KR-20030039931-A (KR)
Title: Apparatus for preventing molten metal from adhering to the side wall of tilting funnel
Inventor: KIM GANG SEOK
IPC: C21B7/14
Filed: 2001-11-16
Abstract: PURPOSE: An apparatus for preventing molten metal from adhering to the side wall part of tilting runner is provided to prevent hot metal from adhering to the dropping lower part of hot metal runner and the side wall of the tilting runner by dropping hot metal into the central part of the tilting runner according to the amount of hot metal in the dropping part of the hot metal runner. CONSTITUTION: The apparatus comprises a subsidiary runner guide part (110) comprising a roller guide (20) fixed to both sides of the dropping part (6) of hot metal runner (5), driving rollers (31a,31b) slidingly moved back and forth with being received into the internal space of the roller guide (20), and fixed shafts (30a,30b) fixed to the driving rollers (31a,31b); and a movable subsidiary runner part (120) comprising a subsidiary runner (50) fixed to the fixed shafts (30a,30b) of the subsidiary runner guide part (110) and contacted with the lower surface of the dropping part (6) of the hot metal runner (5), and driving cylinders fixed to the rear end part of both sides of the subsidiary runner (50) and fixed to the lower surface of the dropping part (6) of the hot metal runner (5).
Patent KR-20020077022-A (KR)
Inventor: CHOI JAE YEONG
IPC: C01G31/02
Filed: 2001-11-26
Abstract: PURPOSE: Provided is an economical preparation method of spherical and nano-sized vanadium oxide(V2O5) particles by using a mixed solvent of water/polar organic solvent or water/glycols in the sol-gel process. CONSTITUTION: The preparation method comprises the steps of: dissolving a material containing 01-0.5M of vanadium ions into aqueous H2O2 or acid(HCl, HNO3 or H2SO4) for an aqueous vanadium solution; adding 60-98vol.%(based on the total volume of aqueous vanadium solution and solvent) of at least one polar organic solvent selected from pyridine, N-methyl-2-pyrolydone and N,N-dimethyl acetamide or at least one glycol selected from ethylene glycol, propylene glycol and butylene glycol; aging the mixture for 0.5-100hrs; filtering precipitates and drying. The prepared divanadium pentoxide(V2O5) is 30-80 nanometer in size.
Patent KR-20030046695-A (KR)
Title: Hybrid electric vehicle of engine control system
Inventor: LIM JONG SEOK
IPC: B60L11/18
Filed: 2001-12-06
Abstract: PURPOSE: An engine control device is provided to cope with design and structure variations by making an electronic control unit(ECU) connected with another control system without a separate device. CONSTITUTION: A power part(10) receives a battery power. A communication part(20) transmits and receives control data to and from each control system connected via a communication bus. A knock detection part(30) detects knocking due to the imperfect combustion. The first interface part(40) interfaces signals of analog detection sensors of a hybrid electric vehicle, and the second interface part(50) interfaces signals of digital detection sensors of the vehicle. A control part(60) analyzes the interfaced analog and digital signals, judges all states of the vehicle and controls all operations for maintaining a started engine safely. An IGBT(70) determines an ignition timing of each cylinder by a PWM signal according to a control signal from the control part. The first driving part(80) carries out injection of a calculated fuel amount of each cylinder according to a control signal from the control part. The second driving part(90) drives ISC and ETC according to a control signal from the control part. The third driving part(100) drives feedback control elements according to a control signal from the control part. A memory part(110) stores various information learned at an on-state of an engine and diagnosis information.
Patent KR-20030048298-A (KR)
Title: An apparatus for automatically screening raw materials
Inventor: AHN HO SEONG
IPC: B07B1/18
Filed: 2001-12-12
Abstract: PURPOSE: An automatic sorting device of washed raw ore is provided to wash raw ore in a raw material washing process in a lime burning plant and simultaneously automatically sort them by size and dehydrate them. CONSTITUTION: The automatic sorting device includes: a plurality of cylindrical nets(31,32) which are spaced at a proper gap in an automatic washing and sorting machine(30), longitudinally supported by cylindrical net supports(30a,30b), have their outlet sides to have a stepped portion, formed with a raw rock induction liner(31a,32a) and automatically classifies charged raw ore(27,28,29) by size; and an air control valve(33a) installed so that a plurality of air spray nozzles are close to the outlet side of the cylindrical nets(31,32) and dehydrating the washed raw ore(27,28); and outlet chutes(34,35,36) which are installed as much as a number of the kinds of the raw ore(27,28,29) classified at the outlet side of the cylindrical nets(31,32).
Patent KR-20030049172-A (KR)
Inventor: KIM TAE SANG
IPC: B60G15/07
Filed: 2001-12-14
Abstract: PURPOSE: A suspension for a vehicle is provided to steer easily by preventing impact from the road surface from being transmitted to a steering wheel, and to prevent fluctuation of suspension values by stabilizing the structure. CONSTITUTION: A suspension system comprises a strut(53) inclined and installed to a wheel and composed of a shock absorber; a strut mount(51) installed in a vehicle body to fix the upper part of the strut; a coil spring(55) installed between the strut mount and a spring seat fixed in the strut; a damper fork(56) installed in the lower part of the strut mount; a knuckle unit supported by the damper fork and composed of a knuckle arm; a rotation part(70) rotated and installed to the strut mount; and an arm(80) extended from the knuckle unit and connected to the rotation part by an assembling unit(90). Operational force for steering is reduced by turning the rotation part to the strut, and values of the suspension are fixed with stable and simple structure.
Patent KR-20030053199-A (KR)
Title: Over load protector of scroll compressor
Inventor: KIM SEONG CHUN
IPC: F04C23/00
Filed: 2001-12-22
Abstract: PURPOSE: A device for protecting overload of a scroll compressor is provided to prevent overload by sensing the temperature of a refrigerant compressed and discharged by interaction of a rotary scroll and a fixed scroll and by controlling power supply. CONSTITUTION: A scroll compressor has a fixed scroll(21) and a rotary scroll(25) forming plural compression chambers. A device(72) for protecting overload of the scroll compressor has an OLP(Over Load Protector) mounted to the high-pressure side(P3) to the upper side of the fixed scroll. The OLP measures the temperature of the refrigerant compressed and discharged by the fixed scroll and the rotary scroll and prevents overload by controlling power supply by the measured temperature. The OLP is mounted to a combining groove(71) formed to a high/low pressure separation plate(24) dividing the inner space of a casing(10) into the high-pressure side and the low-pressure side(P1). Thus, reliability of the compressor is improved.
Patent KR-20030057076-A (KR)
Title: A printing apparatus and a method of forming color filter
Inventor: CHO SO HAENG
IPC: G02F1/13
Filed: 2001-12-28
Abstract: PURPOSE: A printer for color filter formation and a color filter forming method are provided to save time and cost for manufacturing a color filter by sequentially forming color filter layers and mechanically aligning a substrate. CONSTITUTION: A printer(150) has three cliches(100a,100b,100c) and three transfer rolls(109a,109b,109c). Stages(135a,135b,135c) are formed parallel to the cliches. The cliches have recesses(102) filled with color resists(104). The color resists are transferred to the transfer rolls in response to the rotation and advance of the transfer rolls. The color resists transferred to the transfer rolls are re-transferred to a substrate. Thus, color filter layers are formed. The color filter layers are formed sequentially by installing the transfer rolls sequentially.
Patent KR-20030057974-A (KR)
Title: Assembly structure of ball bearing type bush in a shock absorber
Inventor: JUNG SEONG HUN
IPC: F16F13/14
Filed: 2001-12-29
Abstract: PURPOSE: A ball bearing type bush assembly structure for a shock absorber is provided to improve proof lateral load capacity of a piston rod by installing the ball bearing type bush to an inner surface of a rod guide instead of a guide bush. CONSTITUTION: A ball bearing type bush forms a concave portion(10) along an inner surface of a rod guide slid with a piston rod. A ball bearing assembly(11) is installed to the concave portion by arranging ball bearings(13) to frictionize rollingly an outer surface of the piston rod lifted up and down by a damping operation of a shock absorber. The ball bearing assembly comprises ball bearings and a support member. The support member stores ball bearings as a ring shape. Ball bearings are protruded by forming an opening around an inner peripheral surface of the support member. Consequently, proof lateral load capacity is improved, and wearing of ball bearings by the piston rod is reduced.
Patent KR-20010072134-A (KR)
Title: 매트를 제조하는 방법과 그에 의해 얻어지는 제품
IPC: B32B5/26
Filed: 1999-07-29
Abstract: 본 발명은, 섬사로 만들어진 섬유(들)의 적어도 하나의 제 1 층 또는 일련의 층들과 섬사로 만들어진 섬유(들)의 적어도 하나의 제 2 층 또는 일련의 층들을 적어도 하나의 움직이는 컨베이어에 증착하는 단계를 포함하는 방법에 관한 것이다. 본 발명은, 적어도 제 1 층 또는 일련의 층들과 제 2 층 또는 일련의 층들을 적층하기 전에 제 1층 또는 일련의 층들의 섬유(들)의 적어도 일부분을 푸는 단계를 포함하는 것을 특징으로 한다.
Patent KR-20010085861-A (KR)
IPC: A61K48/00
Filed: 1999-09-30
Abstract: 본 발명은 백혈병 및 암과 같은 악성 질환의 치료용 조성물 및 방법에 관한 것이다.  본 발명의 조성물은 WT1 폴리뉴클레오타이드, WT1 폴리펩타이드, WT1 폴리펩타이드를 제공하는 항원-제시 세포, WT1 폴리펩타이드에 특이적으로 결합하는 항체, 또는 WT1 폴리펩타이드와 특이적으로 반응하는 T 세포를 하나 이상 포함한다.  상기와 같은 조성물은 예를 들면, 전이성 질환의 예방 및 치료용으로 사용될 수 있다.
Patent KR-20010100878-A (KR)
Title: Flooring material comprising elements which are assembled by means of separate joining elements
IPC: E04F15/02
Filed: 1999-09-27
Abstract: A flooring system comprises board shaped floor elements (1) having a mainly square or rectangular shape and each being provided with four side edges (2), a lower surface (5) and a decorative upper surface (3). The flooring system further comprises separate joining profiles (10) for connecting said board shaped floor elements (1) to each other. Each of the floor elements (1) is provided with grooves (4) which are formed in the lower surface (5) thereof, each groove being positioned in parallel to one of the side edges (2) of the floor element (1), and each joining profile (10) is provided with lips (11) arranged in pairs and joined by a middle section (12), each lip (11) being so arranged and constructed as to be received by one of the grooves (4) of a floor element (1). According to one alternative, each of the joining profiles (10) has the shape of a plus with four cheeks, and three of the cheeks of each of these joining prof iles (10) are provided with said lips (11) arranged in pairs and joined by a middle section (12), whereas the forth cheek thereof is provided with only one lip (11) and a middle section (12). Alternatively, each joining profile (10) has the shape of a T with three cheeks, the cheeks of each joining profile (10) each being provided with said lips (11) arranged in pairs and joined by a middle section (12). <IMAGE>
Patent KR-20010101624-A (KR)
Title: 이미지 프로젝션 시스템
IPC: G02B27/28
Filed: 2000-10-30
Abstract: 본 발명은 이미지 프로젝션 시스템에 관한 것이다. 이미지 프로젝션 시스템은, 제 1 컬러 및 제 1 편광 방향과 제 2 컬러 및 제 2 편광 방향을 갖는 제 1 및 제 2 광 빔을 이미지 정보에 따라 상기 제 1 및 제 2 광 빔을 변조하기 위한 두 개의 이미지 패널을 포함하는 변조 시스템에 각각 공급하기 위해서, 방사 소스, 편광-감응 필터 수단, 편광 변환 수단, 및 컬러 필터 수단을 포함한다. 본 발명에 따른 이미지 프로젝션 시스템에서 소형의 프로젝션 시스템을 획득하기 위해, 상기 편광-감응 필터 수단, 편광 변환 수단 및 컬러 필터 수단에 의해 점유되는 영역은 일치한다.
Patent KR-20010113869-A (KR)
IPC: G11B11/105
Filed: 2000-05-11
Abstract: 복수의 기록 마크 길이를 사용함으로써,마크 기록 변조된 정보를 기록 매체상에 기록하는 광기록 방법.     광기록 방법은 
     하나의 기록마크의 시간적인 길이를 nT 로 표시하는 경우 (T 는 기준클록주기인 25 ns 이하이고, n 은 2 이상의 자연수), 
     (i)기록마크의 시간적인 길이 nT 를 
     η 1 T, α 1 T, β 1 T, α 2 T, β 2 T,..., α i T, β i T,..., α m T, β m T, η 2 T 
     (m 은 펄스분할수; ∑ i (α i + β i ) + η 1 + η 2 = n; α i (1 ≤i ≤m) 은 0 보다 큰 실수, β i (1 ≤i ≤m-1) 은 0 보다 큰 실수; β m 은 0 이상의 실수. η 1 및 η 2 는 각각 -2 와 2 사이의 실수) 의 순으로 분할하는 단계; 
     α i T (1 ≤i ≤m) 의 시간 내에서 기록 전력 Pw i 의 기록광을 조사하는 단계; 및 
     β i T (1 ≤i ≤m-1) 의 시간 내에서 Pb i < Pw i ,및 Pb i < Pw i+1 인 바이어스 전력 Pb i 의 기록광을 조사하는 단계를 포함하고; 
     (ii) 기록 마크의 시간 길이 nT 의 n 에 따라서, m, α i , β i , η 1 , η 2 ,Pw i , 및 Pb i 을 변경하는 단계;를 포함하고, 여기서, 펄스 분할수 m 은 적어도 1 기록 마크의 시간지속동안 2 이상이고, 모든 기록 마크의 시간길이 동안 n/m ≥을만족한다.
Patent KR-20020005729-A (KR)
IPC: H01J31/12
Filed: 2000-04-24
Abstract: 본 발명의 평면형 화상 표시 장치의 제조 방법은, 전자 방출 소자를 갖는 리어 플레이트(rear plate)에 형광체 스크린을 갖는 페이스 플레이트를 소정의 간극으로 대향 배치하여 접합시키는 공정을 포함하는 것을 특징으로 한다.  리어 플레이트(20)와 페이스 플레이트(10) 중 적어도 한쪽을, 전자선 세정실(42, 46) 내에 수용하여, 전자선 세정실(42, 46) 내에 설치된 전자선 발생 장치(52)로부터, 리어 플레이트(20)나 페이스 플레이트(10)에 대하여 진공 분위기 중에서 전자선(53)을 조사하여, 표면에 흡착된 가스를 충분히 방출시킨다.  이렇게 하여, 표시 장치 내부의 표면 흡착 가스를 충분히 방출시킴으로써 외위기로서의 진공 용기 내부를 고진공 상태로 유지하는 것이 가능하게 된다.
Patent KR-20010113961-A (KR)
IPC: C08F4/54
Filed: 2000-05-05
Abstract: 본 발명은 ABS 성형물의 제조 방법에 관한 것이다.  본 발명에 따라, 고무 함유 용액이 먼저 제조된 후 이 고무 함유 용액의 존재하에 ABS 성형 조성물을 제조하기 위한 중합이 수행된다.  상기 고무 함유 용액은 a) 적어도 하나의 희토류 금속 화합물, b) 적어도 하나의 유기알루미늄 화합물 및 c) 임의로는 루이스산을 함유하는 촉매의 존재하에 비닐방향족 단량체의 용액중에서 디올레핀을 중합함으로써 제조된다.
Patent KR-20020008194-A (KR)
Title: 목표지정가능 자동 초점 시스템
IPC: H04N5/232
Filed: 2000-03-24
Abstract: 디지탈 카메라는 광 밀폐 하우징을 포함한다.  적어도 하나의 고상 어레이 이미지 센서가 하우징에 설치된다.  렌즈는 하우징을 통하여 고상 어레이 이미지 센서에 광학적으로 결합된다.  뷰잉 스크린은 고상 어레이 이미지 센서에 의해 감지된 이미지를 뷰잉하기 위하여 고상 어레이 이미지 센서에 결합된다.  이미지 상의 어느 지점이든 선택하기 위하여 사용자-조작식 포인팅 장치가 이용된다.  고상 어레이 이미지 센서와 관련된 회로는 이미지 상의 포인트와 관련된 영역을 뷰잉 스크린 상에 표시하기 위하여 포인팅 장치에 반응하며, 그 영역은 확대되고 이미지의 나머지 부분에 대하여 높은 해상도를 갖는다.
Patent KR-20020060591-A (KR)
Title: Process for the Preparation of Pure Triethylenediamine(TEDA)
Inventor: FRAUENKRON MATTHIAS
IPC: C07D487/08
Filed: 2002-01-09
Abstract: PURPOSE: Provided is preparation of pure triethylenediamine(TEDA) by evaporating TEDA from the mixture comprising a solvent or diluent. Triethylendiamine(TEDA), which is a solid under normal conditions, is an important catalyst for the production of polyurethane foams. CONSTITUTION: The process for the preparation of a solution of pure triethylenediamine(TEDA) comprises evaporating TEDA from a mixture comprising a solvent or diluent, where the solvent or diluent has a boiling point at atmospheric pressure in the range from 175 to 250 deg.C, and introducing the vapor-form TEDA into a liquid solvent.
Patent KR-20030061113-A (KR)
Title: Photosensitive Oligomer having Phenoxy Group and Production Method of the Same
Inventor: CHOI JUN HYEOK
IPC: C08F299/06
Filed: 2002-01-10
Abstract: PURPOSE: Provided are a photosensitive oligomer having a phenoxy group, particularly a photosensitive urethane acrylate oligomer having improved adhesion and solvent resistance, and a method for preparing the same. CONSTITUTION: The urethane acrylate oligomer represented by formula 1, is formed by reacting a polyol(A) having at least one hydroxyl group, and a polyisocyanate(B) having at least two isocyanate groups, and acrylate or methacrylate(C) having at least one phenoxy group and at least one hydroxyl group. In the formula 1, R1 is a backbone of polyol, R2 is a backbone of polyisocyanate, and A(MA) which is an acrylate or methacrylate not having hydroxyl group, has a structure of formula 2(wherein R3 is H or CH3, R4 is £CH2CH2O|x, £CH2CH2CH2O|x, or £CO(CH2)5O|x, provided that x is an integer of 1-50).
Patent KR-20030063785-A (KR)
Title: An overload preventing apparatus of a mechanical press
Inventor: HUR BO YOUNG
IPC: B30B15/14
Filed: 2002-01-24
Abstract: PURPOSE: An overload protective device for a mechanical press is provided to improve the quality of machining by measuring the load of the press at any time. CONSTITUTION: A detecting unit(20) measures the pressure applied to an overload cylinder. A power unit(50) supplies direct current to an input unit(38) in the detecting unit. An amplifying unit(70) amplifies the difference between the input current and the output current of the detecting unit. A signal processing unit(40) processes the amplified signal output from the amplifying unit, and outputs the measured value through a display(44) or a relay(46).
Patent KR-20020064167-A (KR)
Inventor: ITO MASATO
IPC: G01B11/14
Filed: 2002-01-28
Abstract: PURPOSE: To provide a spark plug manufacturing method and a manufacturing device capable of highly accurately manufacturing a spark plug on the basis of a photographing image by phorographing the image in a state capable of highly accurately detecting the edge of a central electrode and an earth electrode in manufacturing the spark plug. CONSTITUTION: An illuminating means 200 is oppositely arranged to a spark plug tip part for forming a spark gap so that the illuminating light passes through the spark gap in a photographing process, and the spark gap formed by the central electrode W1 and the earth electrode W2 is photographed by a photographing camera 4 arranged on the opposite side of the illuminating means 200 by sandwiching the spark plug tip part. When executing this photographing process, a light shielding part 203 for partially shielding the illuminating light in the direction for radiating outside the spark gap among the illuminating light turning to the spark plug tip part side from a light source 201, is arranged between the light source 201 of a lighting system 200 as the illuminating means and the spark plug tip part.