baber/WOPTO huggingface dataset:
Patent JP-2003515869-A (JP)
Title: スティクションを低減させる凹状、溝状のレールを有するディスク・ヘッド・スライダ
IPC: G11B5/60
Filed: 2000-12-01
Abstract: (57)【要約】
ディスク・ヘッド・スライダ（１１０、５００）は、キャビティ・ダム（２３０、５０６）と、亜大気圧キャビティ（２３６、５１０）と、第１および第２の細長いレール（２１０、２１２、５０２、５１０）とを含んでいる。第１および第２のレール（２１０、２１２、５０２、５０４）は、亜大気圧キャビティ（２３６、５１０）の周りに配設されている。各レール（２１０、２１２、５０２、５０４）は、内側のレール縁部（２１４）から外側のレール縁部（２１６）まで測定されたレール幅と、前方の支持面（２１８）と、後方の支持面（２２０）と、前方の支持面と後方の支持面（２１８、２２０）との間に延びる凹状領域（２２２、５１２）とを有している。凹状領域（２２２、５１２）は、レール幅にわたって、支持面に対して凹み、キャビティ・フロアに対して凸状に形成されている。第１および第２のレール（２１０、２１２、５０２、５０４）の後方の支持面（２２０）にそれぞれ第１および第２の収束溝（２６０、２６２、５１４）が設けられている。各溝（２６０、２６２、５１４）は、それぞれの凹状領域（２２２、５１２）からの流体流に対して開放された前方の溝端部と、非拡散溝側壁（２６８）と、流体流に対して閉鎖されており、それぞれの後方の支持面（２２０）の局部領域の前方に位置する後方の溝端部（２７０）とを有している。
Patent JP-2003524099-A (JP)
Title: 高圧液圧燃料ポンプ
IPC: F04B1/04
Filed: 2000-11-29
Abstract: (57)【要約】
ポンプ（５）は、圧縮方向に積極的に及びインテイク方向に弾性的に移動されるピストン（１６）を滑動させる少なくとも１つのシリンダー（６）を有している。圧縮ばね（２６）は、インテイクバルブ（１９）のシャッター（２１）とピストン（１６）との間に配置されており、ピストン（１６）の位置により異なる弾性力をかけることにより弾性的にシャッター（２１）を閉鎖位置に押す。シャッター（２１）は、インテイクバルブ（１９）の座部（２２）と協働するとともにピストン（１６）と平行移動可能なプレート（２８）を有しており；圧縮ばね（２６）は、インテイクバルブ（１９）の開閉を助長するようにプレート（２８）に作用する。
Patent JP-2003523142-A (JP)
Title: ターンアラウンド型のセルラ式電話機
IPC: H04M1/02
Filed: 2001-01-16
Abstract: (57)【要約】
小型化可能なワイヤレス通信装置は、大型の図形表示装置を前面に配置し、スピーカーを後面に配置して、装置の主前面および主後面の機能を再定義するように構成される。関連したキーパッドは後面または図形表示装置（例えばタッチスクリーンによる）の一方または両方に配置できる。これに代えて、枢動可能なフリップはキーパッド、およびマイクロホンも含むことができる。作動時に、使用者は装置を回転させて所望の入力面を使用のために向けることができる（表示面の使用には前面を上方へ、また電話機の使用には前面を下または離れる方向へ向ける）。ワイヤレス通信装置の作動プラットフォームを２つの活動的な主面を有するように設計する関連した方法も開示される。
Patent JP-2003523878-A (JP)
IPC: B60P1/02
Filed: 2001-01-25
Abstract: Methods and apparatus are provided that load goods into trailers. The apparatus facilitates the loading of goods into the trailer, and optimizes usage of storage space in the trailer.
Patent JP-2004510692-A (JP)
Title: 薬物送達組成物およびデバイス
IPC: A61K9/00
Filed: 2001-04-05
Abstract: 薬物送達組成物。この組成物は、ポリマー材料、錯化剤、およびこの錯化剤と錯体形成した生物反応性薬剤を含有する。これらのポリマー材料、錯化剤および生物反応性薬剤は、送達マトリックスに形成される。この送達マトリックスは、歯周腔の歯肉線の下への配置のために特に適合される。好ましい実施形態において、この錯化剤は、疎水性コアおよび親水性外部を有する。適切な錯化剤は、β−シクロデキストリンであり、これは、メチル−β−シクロデキストリンまたはヒドロキシ−プロピルβ−シクロデキストリン、あるいはこれらの任意の誘導体であり得る。
Patent JP-2003531444-A (JP)
Title: 投資ポートフォリオ・マネージメントの認識と測定とランキングのための、インターネット・ベース・システム、および、ベスト投資家の管理ファンドを含むファンドスーパーマーケットの操作
IPC: G06Q40/00
Filed: 2001-04-17
Abstract: (57)【要約】
インターネット・ベースのビジネス・システムおよびその管理プログラム。特に、ベスト投資家を引きつけて識別する、固有のシステムにより特徴づけられる金融投資管理で、モデル（仮想）投資ポートフォリオ（２８）ベースで、実績に基づく投資競争を提供、促進、および管理することを含み、識別されたベスト投資家のために、実際のポートフォリオを作成し、識別されたファンドマネージャーとしてのベスト投資家のために、実際のミューチュアル・ファンドを作動させ、さらに、そこでファンドスーパーマーケット（４８）として結合した、フル・セットの関連加入者および投資家サービスを提供する。本発明は、識別された株およびファンド（３６）の、１つ以上の重要で適切な金融実績基準、好ましくはＮＡＶ（ｉＴＡＶ）の日替わりフィードバックの促進を含む。
Patent JP-2003532701-A (JP)
Title: トリメチルデセン化合物
IPC: C07C255/07
Filed: 2001-04-28
Abstract: (57)【要約】
一般式（I）：
【化１】
 〔式中、Ｘは、−ＣＨＯ、−ＣＮ、−ＣＮ＝ＮＯＨまたは−ＣＨ 2 ＯＨ基であり、このＣ＝Ｃ二重結合は、ＺまたはＥ配置のいずれかである。〕で示される化合物は、興味のひくオリジナルの、高分散力を有する臭気特性により特徴づけられる。該化合物は、例えば化粧調剤、工業製品またはアルコール性香料中の芳香物として使用するために適している。
Patent JP-2003533537-A (JP)
IPC: C07K16/00
Filed: 2001-05-14
Abstract: Proteins are derivitized by reaction of pendant groups, usually groups which are side chains in non-terminal amino acyl units of the protein, in aqueous reactions in the presence of a denaturant. The denaturant is preferably an amphiphilic compound, most preferably an anionic amphiphilic compound such as a long chain alkyl sulphate mono ester, preferably an alkaline metal salt, for instance sodium dodecyl sulphate. The degree of derivatization is increased, while the protein retains activity, such as enzyme activity. The increase in the degree of derivatization enhances the increase in circulation time in vivo and stability on storage and in vivo. Preferably the derivatizing reagent is an aldehyde compound which reacts with primary amine groups, generally the epsilon-amino group of lysyl units. Derivatization is conducted under reducing conditions to generate a secondary amine derivative.
Patent JP-2003199713-A (JP)
Title: Ophthalmologic examination apparatus
Inventor: OKUMURA YOSHIAKI
IPC: A61B3/10
Filed: 2002-01-04
Abstract: <P>PROBLEM TO BE SOLVED: To perform the diaphanoscopic observation without reflection of a lighting source on a cornea when an diaphanoscopic image is observed.  <P>SOLUTION: An image of an examined eye E' is displayed on a CRT monitor 29. When a measuring light beam is irradiated from a measuring light source on the eyeground of the examined eye, the inside of the pupil Pt is illuminated by the reflection light on the eyeground and clearly observed if the eye is normal. However, if there is turbidity caused by the cataract, etc., the turbid part is observed as a dark shadow. At the time, if an examined eye examination part is located at the same position as the measuring position, an intensive reflection image M of the measuring light beam appears at the position where the measuring light beam is projected because of the reflection on the cornea, and the reflection image M becomes an obstacle in the observation. Accordingly, by driving a movable pedestal on which the examined eye examination part is mounted and projecting the measuring light beam from a position different from the measuring position, the pupillary zone is observed with the reduced effect of the reflection image M.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003208526-A (JP)
Title: Sponsor recruiting method
Inventor: SATAKE YASUHIRO
IPC: G06Q30/06
Filed: 2002-01-10
Abstract: <P>PROBLEM TO BE SOLVED: To easily register desired information by presenting an advertisement insertion desiring state to an advertisement insertion desirer by easily and quickly matching a Web site provider for recruiting advertisement insertion with the advertisement insertion desirer on the Internet.  <P>SOLUTION: When the advertisement insertion desirer designates a desired Web site by browsing a summary of an advertisement desiring Web site by an advertisement recruiting entry summary page 3, an advertisement insertion desiring information registering page 4 is displayed, and advertisement insertion desiring information is written in this page. When the Web site provider designates information when there is the information fit for one's own desire by comparing information on respective advertisement insertion desirers of an advertisement insertion desiring information registering entry summary page 6 for an advertisement recruiter, determination of advertisement insertion is informed to the advertisement insertion desirer by e-mail.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2002332723-A (JP)
Title: Roof support with integral gutter
Inventor: FLOYD GREGORY
IPC: E04C3/28
Filed: 2002-01-11
Abstract: PROBLEM TO BE SOLVED: To provide a roof support material with integral gutter. SOLUTION: This roof support 20 having an integral gutter comprises a roof support body 20 for a small depot, a working building, or a garage with a roof of shallow pitch, a panel joint part cover, and a gutter. In particular, the roof support body 20 with the integral gutter comprises a support web 22, an exposed surface 24 vertically dividing the support web 22 into two parts, and a collector 50 vertically dividing the support web 22 opposed to the exposed surface 24 into two parts. The roof support body 20 with the integral gutter is formed by a draw forming method eliminating the need of additional and separate components to provide a rigidity and strength to the roof support body 20.
Patent JP-2003209956-A (JP)
Title: Ac generator for vehicle
Inventor: NAKAMURA SHIGENOBU
IPC: H02K3/28
Filed: 2002-01-11
Abstract: <P>PROBLEM TO BE SOLVED: To enhance vibration resistance by raising the rigidity of a coil end in an AC generator for a vehicle.  <P>SOLUTION: For a stator winding, inner conductors which are arranged in two or more pairs as an inner layer and an outer layer in the depth direction of a slot, and a first and a second coil end conductors which are arranged extendedly at both ends in the axial direction of the slot, are made. The first coil end 31a is a crossover which connects the inner conductors in different layers within the slot being apart by pitches narrower than those of NS magnetic poles, and the second coil end 31b is a crossover which connects the inner conductors in different layers within the slot being apart by pitches of NS magnetic poles. Consequently, the height of the first coil end can be lowered, so that the vibration resistance can be enhanced by raising the rigidity of the coil end. Moreover, since the generator can lower the electric resistance value of the first coil end, this can contribute to output elevation by lowering heat radiation loss.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003204965-A (JP)
Title: Method and system for measuring percent of body fat
Inventor: KAGEYAMA NAOKI
IPC: A61B10/00
Filed: 2002-01-11
Abstract: <P>PROBLEM TO BE SOLVED: To provide a method and system for measuring a percent of body fat having improved measurement accuracy by restraining an measurement error due to an internal shape even if bathtubs having a variety of internal shapes are used.  <P>SOLUTION: The method and the system is intended to measure the percent of body fat by obtaining a volume (ΔQ) from a rise in a water level when the human body is lowered into the water of a bathtub (7). Water is continuously poured until the bathtub (2) is filled with water to the brim. The quantity of water for every unit water level rise (h) after the detection of a reference water level (Lr) is detected and the quantity of water per unit water level is stored in a storage means (storage device 18). When the human body is lowered into the water of the bathtub, the volume of the body is computed from the water level rise. Namely, by simply measuring specific gravity by means of bathing or the like, the percent of body fat can be measured correctly.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003209905-A (JP)
Title: Controller of hybrid vehicle
Inventor: KITANO KAZUHIKO
IPC: B60L50/16
Filed: 2002-01-15
Abstract: <P>PROBLEM TO BE SOLVED: To prevent a decrease in regenerative energy that is collectable in the whole vehicle, while the stability of traveling of the vehicle is kept in decelerating the vehicle.  <P>SOLUTION: When regenerative energy is generated by a regenerative operation of a front motor MF and a linear motor MR in decelerating a vehicle, a regenerative amount shifting from a rear wheel side to a front wheel side is set by an ECU 11 according to a steering angel of the front wheel Wf and the rear wheel Wr and the deceleration state of the vehicle. At the same time, the set regenerative amount is subtracted from a rear regenerative torque command that is required for the rear motor MR and is added to a front regenerative torque command that is required for the front motor MF.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003206806-A (JP)
Title: Turbo fan engine of core engine separation type
Inventor: SAITO YOSHIO
IPC: F02C1/02
Filed: 2002-01-16
Abstract: <P>PROBLEM TO BE SOLVED: To provide a silent turbo fan engine of a core engine separation type allowing reduction of noise generated by a control propelling device by using high pressure air as working fluid of a turbine for driving a control fan for controlling a body attitude.  <P>SOLUTION: The control fan 17 constituting the control propelling device 4 disposed for controlling the body attitude of the turbo fan engine 1 of the core engine separation type is driven by an air turbine 19 using as the working fluid the high pressure air compressed by a compressor 6 of the core engine 2 and supplied through a duct 10. Speed of the working fluid discharged from the control fan 17 and the air turbine 19 is lower than that of the working fluid discharged from the propelling device 3 for propelling, and is as low as that required for attitude control, so that the noise occurring from the control propelling device 4 is reduced.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003216257-A (JP)
Title: Foldable handle
Inventor: MIZUTANI KEIICHI
IPC: E05F11/04
Filed: 2002-01-18
Abstract: <P>PROBLEM TO BE SOLVED: To prevent a handle arm part that has been rocked up to a save position from rocking in both directions.  <P>SOLUTION: A foldable handle is provided with a stopping part 14 provided in a handle base part 3, allowed to abut on the handle arm part 5 that been rocked up to the save position to prevent the handle arm part 5 from rocking in the same direction, a stopper piece 7 attached to an end part on the side of the handle base part 3 of the handle arm part 5 freely movably in the length direction of the handle arm part 5, and a spring 8 for energizing the stopper piece 7 toward the handle base part 3. The handle base part 3 is provided with a recessed part 22, and the stopper piece 7 is provided with a projecting part 15 that is fitted into the recessed part 22 when the handle arm part 5 is located at its operating position. The handle base part 3 is provided with an engaging part 16 with which a projecting part 15 of the stopper piece 7 is engaged when the handle arm part 5 is located at the save position. When the handle arm part 5 comes to the save position, the handle arm part 5 is allowed to abut on the stopping part 14, and the projecting part 15 of the stopper piece 7 is engaged with the engaging part 16 of the handle base part 3.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2002324409-A (JP)
Title: Colored lighting system
Inventor: GREINER HORST
IPC: F21Y115/10
Filed: 2002-01-21
Abstract: PROBLEM TO BE SOLVED: To provide a colored lighting system which can generate a desired color light in high homogeneity and uniformity as to light color and luminance, especially on a bigger light emission surface. SOLUTION: The lighting system which has a light emission surface and a plurality of light sources with different colors, and generates a mixed color is constituted such that a light guide plate with a plurality of recesses are installed, each recess contains one light source and has an upper side and sidewalls facing the light emission surface, the upper side is coated with a first reflecting layer, and lights into the light guide plate are coupled and are generated through the sidewall.
Patent JP-2003210311-A (JP)
Title: Incense stick holder
Inventor: KOZU HIDEHITO
IPC: E04H13/00
Filed: 2002-01-22
Abstract: <P>PROBLEM TO BE SOLVED: To provide an incense stick holder which enables a user to adequately offer incense sticks in the state of erecting the incense sticks in offering the incense sticks in front of a grave when visiting the grave.  <P>SOLUTION: The incense stick holder 10 has an incense stick holder section 2 which supports the incense sticks in the state of erecting the incense sticks and an ash receiving section 4 which is arranged below the holder section 2 and receives the ash of the incense sticks offered to the holder section 2, in which the holder section 2 is disposed to support an incense stick receiver 6 to be erected with the incense sticks by a supporting frame 16 and the ash receiving section 4 is formed drawably in a longitudinal direction.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003218116-A (JP)
Title: Semiconductor device and its manufacturing method
Inventor: KIKUCHI TOSHIKATSU
IPC: H01L21/3205
Filed: 2002-01-23
Abstract: <P>PROBLEM TO BE SOLVED: To provide a semiconductor device including multilayer wiring and having good smoothness of its interlayer insulation film and its manufacturing method.  <P>SOLUTION: The manufacturing method includes processes of forming a multilayer interlayer insulation films composed of an insulation film and an SOG film on and beside underlayer wiring of the semiconductor device which has multilayer wiring structure and etching the films back until the difference in level of the underlayer wiring is reduced to form a smooth surface. In this method, the processes of making the insulation film and the SOG film on and beside the underlayer wiring and etching the SOG film until the insulation film on the wiring is exposed are repeated at least twice.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003224981-A (JP)
Title: Discharge lamp lighting apparatus
Inventor: MITSUYASU HIROSHI
IPC: H05B41/24
Filed: 2002-01-28
Abstract: <P>PROBLEM TO BE SOLVED: To reduce the period, while the phase of a resonance current is capacitive and reduce stresses of respective component devices, even if a load is in a terminal stage of its operation life or a no-load state.  <P>SOLUTION: This discharge lamp lighting apparatus comprises an inverter circuit 1, a resonance circuit 2, a load circuit 3 including a discharge lamp La, an oscillation control circuit 7 which controls the oscillation frequency of the inverter circuit 1, a no-load detection circuit 4 which detects the no-load state of the load circuit 3, a phase detection circuit 5 which detects the phase of a current supplied to the resonance circuit 2, and a timer circuit 6 which measures the time, from a timing when the phase detection circuit starts operation. If the phase of the current which is detected after the discharge lamp La is lit is capacitive, the oscillation frequency of the inverter circuit 1 is controlled to increase to a value larger than the natural oscillation frequency of the resonance circuit 2, and if the no-load state is not detected by the measurement of the timer circuit 6 within a prescribed measurement time interval, the oscillation frequency of the inverter circuit 1 is controlled to return to the oscillation frequency, when the discharge lamp La is lit.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2002238538-A (JP)
Title: Method and device for manufacturing multiple filter
Inventor: HEITMANN UWE
IPC: A24C5/18
Filed: 2002-01-28
Abstract: PROBLEM TO BE SOLVED: To provide a method and a device for manufacturing multiple filters for products in a cigarette processing industry, and to provide the multiple filters. SOLUTION: At least two amounts in a ratio of filter materials 20, 26, 27, 30, and 116 are introduced into a filter sleeve 11 in one method process. In processing stations 17, 23, 24, 28, 31, 32, 131, and 132, at least two amounts in the ratio of the filter materials 20, 26, 27, 30, and 116 can be introduced into at least one filter sleeve 11. In one processing process in at least one processing station, at least two amounts in the ratio of filter materials can be introduced into at least one filter sleeve.
Patent JP-2003223743-A (JP)
Title: Optical disk substrate, manufacturing method of its master disk, master disk for molding of optical disk substrate, and optical disk
Inventor: HASHIGUCHI TSUTOMU
IPC: G11B7/24079
Filed: 2002-01-29
Abstract: <P>PROBLEM TO BE SOLVED: To stably record high density information by reducing expansion of recording marks to adjacent tracks even if a track pitch is narrowed.  <P>SOLUTION: Projections 10 are set up along a guide groove at edge parts of a groove 2 which is a guide groove and a land 3 of an optical disk substrate 4 with a guide groove having the land 3 which is a convex part, and heat generated in recording both of the land 3 and the groove 2 is prevented from being conducted to adjacent groove 2 or land 3. Thus the recording marks are stably recorded at the lands 3 and the grooves 2 and also crosstalks are significantly lowered.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003223106-A (JP)
Title: Tag
Inventor: KAWAZOME MITSURU
IPC: G09F3/10
Filed: 2002-01-30
Abstract: <P>PROBLEM TO BE SOLVED: To provide a tag which does not require peeling of release paper in use, makes work easy, and does not produce useless wastes.  <P>SOLUTION: The tag 1 comprises a base material 2, a tacky adhesive layer 3 applied on its one surface side, the release paper 4 covering the adhesive layer 3, and a tag body. One end side of the release paper 4 is provided with a notched part 5 and the release paper is peeled over a prescribed range to expose the adhesive layer 3, by which a first tacky adhesive part 6 is formed. The other end side of the release paper 4 is compartmentalized by a pair of slits 7 and 7 to form the release paper 8 to be bonded to the first tacky adhesive part 6 when the tag body is two-folded. A second tacky adhesive part 10 is formed by the adhesive layer 3 corresponding to the release paper 8.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2002304843-A (JP)
Title: Device for encoding audio signal, method for transmitting and receiving audio signal, and recording medium for computer program
Inventor: TANAKA YOSHIAKI
IPC: G10L19/00
Filed: 2002-01-31
Abstract: PROBLEM TO BE SOLVED: To simplify a playback operation by a user, to improve user- friendliness, and to simplify real time management in the case of recording mainly audio signals. SOLUTION: The audio disk has an SAMG(simple audio manager), an AMG, audio title sets(ATSs) containing a plurality of audio objects(AOBs), and still picture sets(SPSs). The AOB is composed of two kinds of AOTT-AOBs, namely an object containing only audio data, and an object containing audio data and real time information data (RTI data). The still picture set(SPS) contains still picture data (SPCT data).
Patent JP-2003224458-A (JP)
Title: Load drive circuit
Inventor: MIYAGE KATSUYUKI
IPC: G05F1/56
Filed: 2002-01-31
Abstract: <P>PROBLEM TO BE SOLVED: To suppress heat generation in an FET due to switching loss by devising a circuit configuration for controlling an FET 2 and shortening the ON-to-OFF time of the FET 2 to be equal to the OFF-to-ON time.  <P>SOLUTION: A load drive circuit 1 comprises a first switching means 6 for controlling continuity between the gate of the FET 2 and one polar side of a battery 11. Control is performed to open the first switching means 6, when a voltage to be applied to the gate of the FET 2 is at high level and to close the first switching means 6, when the voltage to be applied to the gate of the FET 2 is at low level. Thus, when the gate voltage of the FET 2 is changed- over into the low level, the first switching means 6 is closed, the gate of the FET 2 becomes conducting to one polar side of the battery 11, and the fall time of the gate voltage is shorted to a level equal to that of the rise time. Thus, heat generation due to the switching loss in the FET 2 is suppressed.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003222356-A (JP)
Title: Full pneumatic type floor cooling and heating system for dwelling house
Inventor: NISHINO MUNETAKE
IPC: F24F13/068
Filed: 2002-02-01
Abstract: <P>PROBLEM TO BE SOLVED: To provide a full pneumatic type cooling and heating system for a dwelling house using an air-conditioned air in a form of cool or hot wind produced by an air-conditioner.  <P>SOLUTION: The full pneumatic type cooling and heating system is composed of a radiation type floor cooling and heating device to cool or heat each panel board 4 from its bottom surface by the air-conditioned air arranged in cool or hot wind from the air-conditioner 24 sent into a lower air passage 2, and further cool or heat the panel board 4 by feeding with pressure the air- conditioned air arranged in cool or hot wind sent to the lower air passage 2 into an upper air passage 3 through a pressure feeding means 37 by means of suction using a pressurizing machine 25 so that the cool or hot air is radiated into a room R and a floor-blowout type cooling and heating device to blow out the air-conditioned air arranged in cold or hot wind sent to the lower air passage 2 from the air-conditioner 24 into the room R via a slit 6 opened in a griller 5.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003227913-A (JP)
Title: Diffraction optical element
Inventor: TOKIYODA YOSHIBUMI
IPC: G02B5/18
Filed: 2002-02-04
Abstract: <P>PROBLEM TO BE SOLVED: To provide a diffraction optical element in which the angular characteristic is improved to be better than heretofore and the productivity of a diffraction grating is improved.  <P>SOLUTION: In the diffraction element 20 a first diffraction element 10 and a second diffraction element 20 which are made of materials different from each other are tightly joined and a diffraction grating groove 30 having a prescribed figure is formed on the joined plane of the diffraction grating elements 10 and 20. The material of one of the diffraction grating elements 10 and 20 is glass for glass mold and the material of the other is an ultraviolet curing resin, and the relation 7.0 μm≤h≤18.0 μm is satisfied where the height of the diffraction grating groove 30 is given by h. Further, the pitch p of the diffraction grating groove 30 is 70 μm or larger.  <P>COPYRIGHT: (C)2003,JPO