baber/WOPTO huggingface dataset:
Patent KR-20040031517-A (KR)
Title: Method for fabricating of thin film transistor array panel
Inventor: HWANG JANG WON
IPC: G02F1/136
Filed: 2002-10-07
Abstract: PURPOSE: A method for fabricating a thin film transistor substrate is provided to prevent thin film transistors from being damaged due to static electricity. CONSTITUTION: An amorphous silicon layer is formed on a transparent insulating substrate(110) and heat-treated, to form a polysilicon layer. The polysilicon layer is patterned to form the first and second polysilicon patterns. A gate insulating layer(140) is formed on the first and second polysilicon patterns, and the first metal layer for forming a gate line is formed on the gate insulating layer. The first metal layer is selectively etched to expose a portion of the gate insulating layer, which corresponds to the first polysilicon pattern. An N-type impurity is doped into the first polysilicon pattern to form an N-type active layer(151). The first metal layer is selectively etched to expose a portion of the gate insulating layer, which corresponds to the second polysilicon pattern. A P-type impurity is doped into the second polysilicon pattern to form a P-type active layer(152). The first metal layer is selectively etched to form the gate line(121). An insulating material is coated on the gate line and patterned to form an interlevel insulating layer having the first through eighth contact holes that expose the N-type or P-type active layer. A data line is formed on the interlevel insulating layer.
Patent KR-20030044778-A (KR)
Title: Container valve with pressure reducing function
Inventor: HASAKA SATOSHI
IPC: F17C13/04
Filed: 2002-10-07
Abstract: PURPOSE: To provide a valve for liquefied petroleum cylinder with a decompression function that can carry out the filling of a gas into the cylinder easily, miniaturize and perform the purge operation for supply of a high purity gas assuredly, while the gas in a condition in which its pressure is reduced to the level of consumption pressure by opening the valve even if the pressure in the cylinder is high. CONSTITUTION: A gas filling passage 14 having a filling valve 13 and a gas leading passage 16 having a leading valve 15 are placed within a valve block 12 mounted on a gas cylinder 10, and a pressure-reducing valve 17 is placed on a primary side of the leading valve 15 in the gas leading passage 16.
Patent KR-20040033621-A (KR)
Title: Method for measuring critical dimension of semiconductor device
Inventor: KIM IL HYEONG
IPC: H01L21/027
Filed: 2002-10-15
Abstract: PURPOSE: A CD(Critical Dimension) measuring method of a semiconductor device is provided to be capable of checking the extent of real cell overlay due to the variance of capacitance for exactly measuring the CD of the semiconductor device. CONSTITUTION: A main pattern(20) is formed on a semiconductor substrate(10). At this time, the main pattern is used as the first electrode layer of a capacitor. A dielectric role layer(30) is formed on the resultant structure. A sub pattern(40) is formed on the dielectric role layer, wherein the sub pattern is used as the second electrode layer of the capacitor. Then, the capacitance between the main and sub pattern is measured. Preferably, a conductive layer is used as the main and sub pattern. Preferably, the conductive layer is made of metal or doped polysilicon. Preferably, the number of main pattern parts is smaller than that of sub pattern parts as much as one part.
Patent KR-20040038175-A (KR)
Title: System for collecting small changes via on-line and method thereof
Inventor: KIM NA IL
Filed: 2002-10-31
Abstract: PURPOSE: A system and a method for collecting change through the online are provided to collectively manage the change generated from various places through the online without separately managing the change generated when a user buys or sells an article. CONSTITUTION: An account managing server(110) stores the personal information for the users(130-1¯130-3), the online account information of the user, and the information including the price stored in the online account, and adds/subtracts price information to the online account when the user deposits/withdraws money from the online account. A calculation manager(120) reads the information including the user information and the online account stored in an account information storing part(100) by a contact or non-contact mode, and updates the price information of the online account by transferring the information corresponding to the change generated from the user to the account managing server through a communication network.
Patent KR-20040038277-A (KR)
Title: Method for mapping of ID between hierarchy using triple queue in CDMA-2000 BSC No.7
Inventor: LEE GYE CHUL
IPC: H04W84/12
Filed: 2002-10-31
Abstract: PURPOSE: A method for mapping IDs between layers by using triple queues in a CDMA-2000 control station No.7 layer is provided to assign three states such as running, ready, and pending states to IDs, if the IDs are differently managed, and to put queues on each state, thereby preventing a call setup from being rejected owing to incorrect IDs. CONSTITUTION: When an IOS(Interoperability Specification) attempts calling(ST11), an SCCP(Signalling Connection Control Part) deletes one ID from a ready queue(ST12). The SCCP inserts the deleted ID into a running queue(ST13), and sets an SCCP connection(ST14). The SCCP decides whether the IOS cancels a set call(ST15). If so, the SCCP cancels the SCCP connection(ST16), and retrieves the corresponding ID from the running queue(ST17). The SCCP inserts the retrieved ID into a pending queue(ST18), and confirms whether a queue handler receives an ID canceling message(ST19). If the SCCP transmits the ID canceling message, the SCCP retrieves the corresponding ID from the pending queue(ST20). The SCCP inserts the retrieved ID into an end of a ready queue(ST21).
Patent KR-20040039887-A (KR)
Title: Optical pick-up having an optical sensor
Inventor: JANG GWON U
IPC: G11B7/085
Filed: 2002-11-05
Abstract: PURPOSE: An optical pickup device is provided to install a non-contact type optical sensor in an optical pickup in place of a conventional mechanical limit switch so that a correct position control is possible and a durability is enhanced. CONSTITUTION: The device comprises an optical pickup(10), an optical sensor(50) and a microprocessor(30). The optical sensor(50) includes a light emitter and a light receiver. The light emitter emits the light toward a fixture formed at a side of the optical pickup(10). The light receiver receives the light reflected from the fixture, and converts the received light into electric signals. If an optical disc is inserted into a CD or a DVD player, the optical pickup(10) is moved toward an inner circumference by a servo control of the microprocessor(30). Then, the optical amount received by the light receiver is increased, and the level of the electric signal is increased.
Patent KR-20040048710-A (KR)
Title: End Tip Apparatus for Reducing Opening Cross Section of Pipe Pile
Inventor: OH SEONG NAM
IPC: E02D5/72
Filed: 2002-12-04
Abstract: PURPOSE: A front shoe device for effective section magnification of a pre-boring pipe pile is provided to reduce the number of used pipe piles and to prevent breakdown or transformation of a pipe pile by increasing end bearing capacity by magnifying the effective area of a pipe pile. CONSTITUTION: The front shoe device for effective section magnification of a pre-boring pipe pile contains: hollow disks(110) provided with hollows to make filler(20) flow in a pipe pile(101) when embedding a pipe pile(101), and closed up the remaining section of the pipe pile(101) to decrease the opening section of the pipe pile(101); and piped vertical units(130) connected to the hollows of the hollow disks(110) and fixed to one side of the hollow disks(110). Wherein another side of the hollow disks(110) or the section of the vertical units(130) is fixed to the front of the pipe pile(101), and the vertical units(130), the hollow disks(110) and the hollows of the pipe pile(101) are connected mutually.
Patent KR-20040049532-A (KR)
Inventor: KWON YEONG GWANG
IPC: H02G3/36
Filed: 2002-12-06
Abstract: PURPOSE: A horizontal cabling system for information and communication remodeling of apartment and a method of the same are provided to supply a high-speed information communication service by using a STAR wiring method. CONSTITUTION: A horizontal cabling system for information and communication remodeling of apartment includes a plurality of generation terminal boxes, a plurality of indoor lead-in cables, and a plurality of indoor cables. The generation terminal boxes(10) are connected to outlets of bedrooms and living rooms of generations of the apartment house. The indoor lead-in cables(23) are installed between intermediate terminal boxes and the outlets of the bedrooms and the living rooms. The indoor lead-in cables are formed with UTP cables. The indoor cables(15,17,19,21) are installed between the generation terminal boxes and the outlets of the bedrooms and the living rooms. The indoor cables are formed with the UTP cables.
Patent KR-20040051447-A (KR)
Title: A super water-repellent and fast dry fabric having the water transfer layer
Inventor: EOM DAE SEOK
IPC: D03D11/00
Filed: 2002-12-12
Abstract: PURPOSE: Textile is characterized by having moisture-absorbing and quick dry function, excellent durability and super water repellent function, containing a moisture transition layer and using natural fiber having high official regain. The textile is useful for sports wear, sports equipment and a uniform. CONSTITUTION: Textile having moisture-absorbing and quick dry function and super water repellent function comprises: a back absorption layer(1) and a moisture transition layer(2) comprised of polyester or polyamide modified cross-section fiber having absorbing function; and a surface super water repellent layer(3) comprised of polyolefine or polyethylene fiber having hydrophobicity. The back absorption layer(1) and the moisture transition layer(2) contain natural fiber having at least 8% of official regain. The surface super water repellent layer(3) comprises polyester or polyamide fiber containing fluorine or silicone type water repellent resin substituting for the polyolefine or the polyethylene fiber.
Patent KR-20040052084-A (KR)
Title: Control system and its method of karaoke player's amp using digital form
Inventor: YOON JAE HWAN
IPC: G11B31/02
Filed: 2002-12-13
Abstract: PURPOSE: A karaoke system controlling system and method is provided to enable a user to freely control an amplification value based on a reference value set by a manager and to convert the user input value within an allowance value based on a digital scheme. CONSTITUTION: The system comprises an input device, an amplifier(21), a controller(22), and a monitor. The input device inputs set values for detailed items which an amplification function comprises. The amplifier(21) receives the input values via the input device and is operated within an allowance range according to the input values. The controller(22) maintains the basic set values offered by a manager, and controls the input values within an allowance range of the basic set values. The monitor digitally displays current set values for detailed items when the user inputs values for the detailed items.
Patent KR-20040053507-A (KR)
Title: An apparatus for controlling the movement of side guiders to prevent the locking of a strip
Inventor: KIM DU CHAN
IPC: B21B39/14
Filed: 2002-12-14
Abstract: PURPOSE: A control system of side guides is provided to prevent locking, jamming and leaning of strip by measuring shape of the strip before the strip is advanced into finishing mill, thereby properly resetting width position of the side guides according to actual width of the strip and horizontal leaning of the strip on transfer table. CONSTITUTION: The control system comprises position detectors(6a,6b) for respectively detecting current position values of left and right side guides; a strip data setting part(48) for setting marginal adjusting value (m) of the left and right side guides; a guide input side strip advance detecting part(8) for detecting if strip is arrived in the input side of the side guides; a strip imaging part arranged at a central part of transfer table(1) to image shape of the strip being transferred; an actual strip width calculation part(43) for respectively calculating actual width (Wt) of the strip and lengths (Wa,Wb) of left and right strips around the central line of the imaged screen based on the imaged shape; a strip left right deviation calculation part(45) for defining difference values between a half of the total width (Wt) of the strip and left and right widths (Wa,Wb) of the strip as left and right deviations (Pa,Pb) of the strip; a transfer state judging part(47) for judging that the strip is in the leaning state if the left and right deviations (Pa,Pb) of the strip exceed a certain allowable deviation limit; a control signal generating part(49) for producing first control signal if advance signal is received from the guide input side strip advance detecting part, and transfer state judging part judges that the strip is in the leaning state; a position moving control part(50) for producing position moving signal for changing position of left and right side guide straight line parts until the current position values of the both side guide straight line parts detected in the position detectors respectively correspond to the sum (Wa+m,Wb+m) of left and right widths of the strip and the marginal adjusting value of the strip data setting part if first control signal is produced in the control signal generating part; and an electromotor driving part for respectively moving the position of the left and right side guide straight line parts according to the position moving signal.
Patent KR-20040057720-A (KR)
Title: Development of High Performance Anti-Swing Control Method for an Overhead Crane
Inventor: CHOI SEUNG GAP
IPC: B66C13/18
Filed: 2002-12-26
Abstract: PURPOSE: An anti-swing control logic is designed with a Lyapunov stability theory, and a trajectory generation logic is designed by applying a minimum time control and the Lyapunov stability theory. CONSTITUTION: In a method for controlling a ceiling crane, a path of the crane is divided into an acceleration track, a uniform acceleration track, a deceleration track(101). A driving distance, a driving speed, a vibration of load, and an acceleration time are calculated in the acceleration track(103). A driving distance, and a decelerating time are calculated in the deceleration track(104). The driving distances are added to calculate total driving distance(105). If the driving distance is different with an objective driving distance, a maximum acceleration of the trolley is changed. And above process is repeated. The trolley is controlled by an actual maximum acceleration and the driving time.
Patent KR-20040061481-A (KR)
Title: Method for estimating channel information in communication system
Inventor: CHOI BONG GI
IPC: H04B7/005
Filed: 2002-12-31
Abstract: PURPOSE: A method for estimating channel state information in a communication system is provided to accurately estimate C/I of a mobile moving at a high speed, thereby efficiently transmitting data by estimating C/I information related to a forward link to be received after 2-3 slots. CONSTITUTION: Weight vectors are obtained to be respectively multiplied by a plurality of C/I(Carrier to Interference ratio) information by using an SVD(Simultaneous Voice and Data) algorithm. The C/I information to be received by the transmitting end is preliminarily estimated by a process of adding the C/I information multiplied by the weight vectors before the receiving end transmits the C/I information to the transmitting end. According to the estimated information, the transmitting end decides scheduling and a transmission rate.
Patent KR-20020020962-A (KR)
Title: 수신레벨 측정시스템
IPC: H04W24/00
Filed: 2000-08-11
Abstract: 본 발명은 도플러 주파수가 높아져 위상변동이 커진 경우라도 고정밀도의 수신레벨 측정을 할 수 있도록 하는 것을 목적으로 한다.     근사직선 추정수단 (2) 은 도플러 주파수 추정값에 따른 시간폭에서 복조데이터계열의 신호진폭을 직선으로서 근사한다.     위상회전량 추정수단 (3) 은 근사직선에 근거하여 위상회전량을 추정한다.     도플러 주파수 추정수단 (4) 은 위상회전량에 근거하여 도플러 주파수를 추정한다.     데이터 지연수단 (5) 은 근사직선 추정처리에 필요한 시간만큼 복조데이터계열을 지연시킨다.     수신신호전력 추정수단 (6) 은 근사직선에 근거하여 수신신호전력을 추정한다.     잡음전력 추정수단 (7) 은 복조데이터계열과 근사직선과의 신호진폭차를 잡음성분으로 간주하여 잡음전력을 추정한다.     평균화 처리수단 (8) 은 수신신호전력 추정수단 (6) 및 잡음전력 추정수단 (7) 의 추정전력값에 근거하여 1 타임슬롯마다의 수신레벨 측정값을 출력한다.
Patent KR-20020025975-A (KR)
IPC: H01L21/822
Filed: 2001-06-08
Abstract: 본 발명은 캐패시터의 평판을 형성하는 전기적 도전성 필라의 어레이를 가지는 캐패시터 구조물, 특히 깊은 서브마이크론 CMOS에서 이용되는 캐패시터 구조물에 관한 것이다.  각각의 필라는 전기적 도전성 비아에 의해서 전기적으로 접속된 적어도 2개의 상이한 도전체 레벨로부터의 전기적 도전성 라인 세그먼트에 의해서 형성된다.  유전성 재료가 2개의 도전체 레벨과 어레이의 필라 사이에 위치한다.  필라는 반대의 노드에 교번하는 방식으로 전기적으로 접속되어 필라는 전기적으로 인터디지트된다.
Patent KR-20020027593-A (KR)
IPC: H01M50/497
Filed: 2000-07-19
Abstract: 본 발명은 20％ 이상의 결정화도를 갖는 폴리프로필렌 중합체, 및 상용성이고 무정형이며 유리질인 중합체를 포함하며, 여기서 상기 중합체들은 폴리프로필렌 중합체의 용융 온도를 초과하는 온도로 가열시 화합물에 혼화 가능하고, 폴리프로필렌 중합체의 결정화 온도 미만으로 냉각시 화합물로부터 폴리프로필렌 중합체의 상이 분리되는 미세다공성 재료에 관한 것이다.  미세다공성 재료는 광유와 같은 화합물을 이용하는 열-유도 상 분리 공정에 의해 두 가지 중합체를 함유하는 1개의 상을 형성함으로써 만들어진다.  미세다공성 재료의 공극은 공정시 붕괴에 대한 내성이 있다.  이 재료로 만들어진 막은 전해질 흡수시에 강도, 다공성 및 이온 저항성의 양호한 조합을 갖는 전지 세퍼레이터로서 유용하다.
Patent KR-20020038744-A (KR)
IPC: G02B6/036
Filed: 2000-07-28
Abstract: 낮은 감쇠를 가진 음의 총분산 도파관 섬유는 레이저가 양으로 첩될 때 론치된 신호 펄스를 압축한다. 상기 레이저는 최적의 바이어스로 제공되어 양의 첩을 유발하지만, 링크에 분산 패널티는 발생하지 않는다. 상기 도파관 섬유는 고성능 멀티플렉스 원거리통신 링크에 분산보상섬유로 사용된다. 도 8의 곡선(96)은 음분산 도파관 섬유를 가진 섬유를 포함하는 링크를 나타낸다. 곡선(98)은 본 발명에 따라 1550㎚에서 음분산을 가진 섬유를 포함하는 링크를 나타낸다. 곡선(100)은 상기 곡선(98)을 발생시키는 레이저보다 더 양으로 첩된 레이저 소스와 본 발명에 따른 섬유를 포함하는 링크를 나타낸다.
Patent KR-20020059414-A (KR)
Title: Formaldehyde-free flame retardant treatment for cellulose-containing materials
IPC: C09K21/12
Filed: 2000-09-22
Abstract: An aqueous finishing composition for cellulose-containing materials, comprising a hydroxyalkyl-functional organophosphorus flame retardant (which contains a substantially non-volatile component at the curing temperature) and a non-formaldehyde cross-linking agent (such as a polycarboxylic acid cross-linking agent), and the materials treated with such a composition. Optional ingredients for the aqueous finishing composition include a cross-linking catalyst and/or an inexpensive saturated alpha-hydroxy polycarboxylic acid such as citric acid (partial replacement of a more expensive preferred polycarboxylic acid will reduce finishing costs).
Patent KR-20030019295-A (KR)
IPC: A61P35/00
Filed: 2000-09-26
Abstract: 본 발명은 부작용이 현저하게 적은, 특히 세포독성이 현저하게 낮은 혈관생성 억제제로서, 종양, 특히 약물 내성 및 전이 암을 치료하기 위한, 화학식 1의 N-치환된 인돌-3-글리옥실아미드의 용도에 관한 것이다. 
     화학식 1
Patent KR-20020042698-A (KR)
Title: Electronic assembly comprising substrate with embedded capacitors and methods of manufacture
IPC: H05K3/46
Filed: 2001-07-26
Abstract: To reduce switching noise, the power supply terminals of an integrated circuit die can be coupled to the respective terminals of at least one embedded capacitor in a multiplayer ceramic substrate. In one embodiment, the capacitor is formed of at least one high permittivity layer. In another embodiment, several high permittivity layers are interleaved with conductive layers. Alternatively, the capacitor can comprise at least one embedded discrete capacitor. Also described are an electronic system, a data processing system, and various methods of manufacture.
Patent KR-20020054342-A (KR)
IPC: G05G1/30
Filed: 2001-07-13
Abstract: 차량용 브레이크 페달 장치에는, 피벗 샤프트를 가지는 페달 브라켓, 페달 샤프트를 가지는 피벗 브라켓,  페달 아암, 본체 구조 부재에 고정되고, 본체 구조 부재와 페달 브라켓 사이에 위치되는 슬라이드 판, 완충 단면 및 회전 이동 보조 단면이 제공된다.  상기 충격 흡수는 페달 브라켓이 소정의 하중을 초과하는 수준으로 차량의 후방으로 지향된 외력과 마주칠 때, 차량의 하방의 후방으로 페달 샤프트가 회전하면서 피벗 브라켓은 피벗 샤프트를 중심으로 피벗 브라켓이 회전하는 것을 허용하는 슬라이드 판으로부터 맞물림 해제되는 그러한 방식으로, 차량의 길이 방향으로 피벗 브라켓과 본체 구조 부재의 상대적인 이동을 허용한다.  또한, 회전 이동 흡수부는, 비작동 위치에서 정상적으로 유지되며, 완충 단면에 의해 야기되는 피벗 샤프트에 대해 피벗 브라켓의 회전 이동을 촉진하도록 본체 구조 부재 및 슬라이드 판 중 적어도 하나가 인접한 맞물림이 야기되도록 작동된다.
Patent KR-20020058015-A (KR)
IPC: H04L12/28
Filed: 2001-09-06
Abstract: A data transmission system comprises a first (12) and two or more second (13, 14, 15) beacon devices interconnected (11) as a cluster capable of wireless message transmission, and at least one mobile device (10) capable of receiving such message transmissions. The first beacon (12) is arranged to broadcast a series of inquiry messages (INQ) according to a first communications protocol, such as Bluetooth. The mobile device (10) detects such inquiry messages and replies with an identifier for itself. The link (A) from the first beacon device is then re-established between a selected one (14) of the second beacon devices. When a handover trigger event occurs, paging and page response messages are used to select a further second beacon device (13) and transfer the communications link (C) thereto.
Patent KR-20020068542-A (KR)
IPC: C23C16/34
Filed: 2000-11-22
Abstract: 화학적 기상 증착(CVD) 알루미늄 질화물 피막(16)을 구비한 물품이 개시되어 있다.  이 물품은 가열 요소, 웨이퍼 캐리어 또는 정전척이다.  이 물품은 알루미늄 또는 붕소의 질화물로 이루어진 기재(10)를 가지며, 또한 저항 가열용 그라파이트 요소(12, 28) 또는 정전척용 그라파이트 요소(30) 또는 이들 모두를 구비한다.  기재(10)와 CVD 알루미늄 질화물 피막(16)와의 사이에는 열분해 붕소 질화물층(14)을 마련할 수도 있으며, 이 붕소 질화물층은 그라파이트 요소 또는 요소들(12)을 포위하거나 또는 노출시킬 수도 있다.
Patent KR-20020079937-A (KR)
Title: 랜딩 콜의 즉각 할당 방법
IPC: B66B1/20
Filed: 2001-03-05
Abstract: 엘리베이터의 수행 경로에 따라 신호전송되는 적어도 하나의 플로어가 동시에 존재하도록 엘리베이터 그룹에 속하는 엘리베이터의 랜딩 콜 장치를 통해 입력되는 콜을 할당하는 방법.  할당 결정은 유전자적 할당 방법에 의해 이루어진다.  할당 결정은 랜딩 콜의 예약과 해제 및 신호전송의 제어를 관리하는 콜 확정 제어 유닛 내로 입력된다.  예약된 랜딩 콜의 경우에는, 유전자의 값의 범위는 제한된다.
Patent KR-20030001465-A (KR)
IPC: C08F2/48
Filed: 2001-05-02
Abstract: 본 발명은 조성물 전체에 전 부피에 걸친 경화 (cure-through-volume, CTV)를 제공하는 첨가제를 포함하는 광경화성 실리콘 조성물에 관한 것이다.  상기 첨가제는 경화성 아미노 실릴-종결된 폴리오르가노실록산인 것이 바람직하다.
Patent KR-20030020281-A (KR)
Title: Discharge apparatus for reciprocating compressor
Inventor: HYUN SEONG YEOL
IPC: F04B39/00
Filed: 2001-05-24
Abstract: PURPOSE: A discharge device for a reciprocating compressor is provide to discharge smoothly compressed gas by the linear reciprocal movement of a piston, to minimize noise coming outside by reducing the noise of discharging pressure pulsation and the opening and closing of a valve while gas is absorbed, compressed, and discharged out. CONSTITUTION: A discharge device for a reciprocating compressor is composed of a cell connected to a gas suction conduit for sucking gas, a cylinder(20) in the cell, a compression unit including a piston(10) performing reciprocal movement in the cylinder, a reciprocating motor having an inner stator, an outer stator, and an operator reciprocating movement between the inner and outer stator, and a frame unit supporting and connecting the compression unit and the reciprocating motor. A first cover member forms at least one gas passage by accepting a valve body controlling the discharge of compressed gas by opening and closing the cylinder. A second cover member is arranged continuously as following of the first cover member, and is connected to a gas discharging pipe. The gas compressed by linear reciprocal movement of the piston in the cylinder is discharged smoothly, and the reliability of the compressor operation is improved.
Patent KR-20030013457-A (KR)
Title: Scanning device including a partly plastic high-na objective system
IPC: G02B13/24
Filed: 2002-04-25
Abstract: An optical scanning device for scanning an information layer ( 104 ) of an optical record carrier ( 102 ) includes a radiation source ( 110 ) for generating a radiation beam ( 108 ) and a high-NA objective system ( 118 ) for converging the radiation beam on the information layer. The objective system includes a first lens ( 116 ) and a second lens ( 117 ). The first lens includes a glass body and the second lens is made of plastic. The signs of the temperature-dependences of the spherical aberration of the first and second lens are different, thereby reducing the temperature-dependence of the spherical aberration of the objective system as a whole.