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1. 发明专利

JP2005122899A Optical pickup device 审中-公开
标题翻译：光学拾取器件
公开(公告)号：JP2005122899A
公开(公告)日：2005-05-12
申请号：JP2005010863
申请日：2005-01-18
申请人： Samsung Electronics Co Ltd , 三星電子株式会社
发明人： KIM TAE-KYUNG , CHUNG CHONG-SAM , AHN YOUNG-MAN , SUH HEA-JUNG
IPC分类号： G02B9/10 , G02B13/00 , G02B13/18 , G11B7/125 , G11B7/135 , H01S5/40
CPC分类号： G11B7/1376 , G11B7/13922
摘要： PROBLEM TO BE SOLVED: To provide a compatible type optical pickup device which uses laser beams of two wavelengths which are different with each other of a short wavelength band and a compatible type optical pickup device which can correct aberration occurring due to a rapid change of the refractive index of an optical material and a compatible optical pickup device in which a DVD to which a laser beam of 650 nm is applied and laser beams around 400 nm shorter than the laser beam of 650 nm are applcable. SOLUTION: In this optical pickup device, a collimating lens 103 including a diverging lens 103b with negative power and a focusing lens 103a with positive power is arranged between a light source 104 and an objective lens 101. When it is assumed that the total focal distance of the collimating lens 103 is (f) and the focal distance of of the diverging lens 103b is fn, the collimating lens satisfies the relationship -1.5>f/fn. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种兼容型光学拾取装置，其使用彼此不同的短波长带的两个波长的激光束和可以校正由于快速发生的像差的兼容型光学拾取装置光学材料的折射率的变化和其中施加有650nm的激光束的DVD和比650nm的激光束短400nm的激光束的兼容的光学拾取装置是可以应用的。解决方案：在该光学拾取装置中，包括具有负功率的发散透镜103b和具有正功率的聚焦透镜103a的准直透镜103布置在光源104和物镜101之间。当假定准直透镜103的总焦距为（f），发散透镜103b的焦距为fn，准直透镜满足关系-1.5> f / fn。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2001291270A HIGH DENSITY RECORDING/REPRODUCING COMPATIBLE TYPE OPTICAL PICKUP DEVICE 失效
公开(公告)号：JP2001291270A
公开(公告)日：2001-10-19
申请号：JP2001057364
申请日：2001-03-01
申请人： SAMSUNG ELECTRONICS CO LTD
发明人： KIM TAE-KYUNG , CHUNG CHONG-SAM , AHN YOUNG-MAN , SUH HEA-JUNG
IPC分类号： G02B5/18 , G02B5/30 , G02B5/32 , G11B7/00 , G11B7/005 , G11B7/125 , G11B7/135 , G11B7/1392 , G11B7/1395
摘要： PROBLEM TO BE SOLVED: To provide a high density recording/reproducing compatible type optical pickup device wherein optical disks different in format are interchanged by one objec tive lens. SOLUTION: The device is provided with a first light branching means which includes a first light source 11 for a first format disk, a second light source 21 for a second format disk and the objective lens suitable for the first format optical disk and an optical wavelength radiated from the first light source and which branches incident light into first light and second light, a second photodetector 29 having a first light receiving part and a second light receiving part which respectively receive the first light and the second light to be reflected while irradiating the optical disk from the second light source and performs photoelectric conversion, and a second signal processing part 20 which corrects a chromatic aberration by the difference of wavelengths of light radiated from the first light source an the second light source and/or a spherical aberration by the difference of substrate thickness between the first and second format optical disks based on a signal detected via the first light receiving part and the second light receiving part and which detects a reproduced signal of the second format optical disk.

3. 发明专利

JP2001216679A OPTICAL PICKUP DEVICE 失效
公开(公告)号：JP2001216679A
公开(公告)日：2001-08-10
申请号：JP2001000846
申请日：2001-01-05
申请人： SAMSUNG ELECTRONICS CO LTD
发明人： CHUNG CHONG-SAM , KIM TAE-KYUNG , AHN YOUNG-MAN , SUH HEA-JUNG
IPC分类号： G11B7/005 , G11B7/095 , G11B7/125 , G11B7/13 , G11B7/131 , G11B7/135 , G11B7/1353 , G11B7/1356
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup device capable of improving characteristics of reproduced signals deteriorated by an optical aberration, defocus and crosstalk or the like owing to the inclination of an optical disk. SOLUTION: The device is composed of a light source 11 irradiating light, an optical branching means 15 combining at least two light spots including a main light spot I and a sub-light spot II on the optical disk 1, an optical path converting means 17 converting the advancing path of incident light, an objective lens 21 which condenses incident light and focuses the light spot on the optical disk, a photodetector 25 which respectively receives light which is reflected from the optical disk 1 and makes incident via the optical path converting means 17, and a signal processing part 30 correcting the aberration owing to the inclination of the optical disk from signals which are detected by the photodetector 25 and are photoelectrically converted.

4. 发明专利

JP2002190128A OPTICAL PICKUP DEVICE FOR DETECTING SPHERICAL ABERRATION AND/OR POSSIBLE TO CORRECT IT 审中-公开
公开(公告)号：JP2002190128A
公开(公告)日：2002-07-05
申请号：JP2001298442
申请日：2001-09-27
申请人： SAMSUNG ELECTRONICS CO LTD
发明人： KIM TAE-KYUNG , AHN YOUNG-MAN , SUH HEA-JUNG , CHUNG CHONG-SAM
IPC分类号： G11B7/24 , G11B7/007 , G11B7/09 , G11B7/125 , G11B7/13 , G11B7/131 , G11B7/135 , G11B7/1353 , G11B7/1369 , G11B7/1381 , G11B7/1392
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup device for detecting spherical aberration and/or possible to correct it. SOLUTION: The optical pickup device includes a light dividing and detecting means that divides and detects a specific optical beam area producing a relatively great intensity distribution change due to a thickness change of an optical beam through an objective lens 57 reflected and diffracted from the recording medium 50 into several optical beam areas so as to separate the specific optical beam area from the rest optical beam areas and a circuit for detecting the spherical aberration that calculates several detection signals toward the specific optical beam area output from the light dividing and detecting means and detects the spherical aberration due to the thickness change of the recording medium. Thereby, the spherical aberration produced by the thickness deflection of the recording medium can be detected accurately without the influence of defocus. Furthermore, the optical pickup device is provided with an element for correcting the spherical aberration. Driving the element for correcting the spherical aberration with the detected spherical aberration signal can help to correct the spherical aberration due to the thickness deflection.

5. 发明专利

JP2002100065A OPTICAL PICKUP DEVICE EQUIPPED WITH COLOR ABERRATION COMPENSATION LENS 有权
公开(公告)号：JP2002100065A
公开(公告)日：2002-04-05
申请号：JP2001204104
申请日：2001-07-04
申请人： SAMSUNG ELECTRONICS CO LTD
发明人： KIM TAE-KYUNG , AHN YOUNG-MAN , CHUNG CHONG-SAM , SUH HEA-JUNG
IPC分类号： G02B13/00 , G02B3/00 , G02B13/18 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup device equipped with a chromatic aberration correcting lens having infinite focal length relatively when compared with the focal length of an objective lens so as to correct the chromatic aberration of the objective lens. SOLUTION: The pickup device is equipped with a light source 10 which emits light, an objective lens 60 which converge the light emitted from the light source 10 to form a light spot onto a recording medium 1, an optical path converter 50 which is disposed in the optical path between the light source 10 and the objective lens 60 to convert the propagation direction of the incident light, a chromatic aberration correcting lens 40 which is disposed in the optical path between the light source 10 and the objective lens 60 to correct the chromatic aberration caused by changes in the wavelength and/or by increase in the wavelength line width of the light emitted from the light source 10, and a photodetector 90 which receives the light reflected by the recording medium 1 and being incident on the detector by way of the optical path converter 50. The chromatic aberration correcting lens 40 consists of at least two lenses: a lens having the positive power and a lens negative power disposed in adjacent to each other, and the whole focal length is controlled to be relatively infinite compared with the focal length of the objective lens.

6. 发明专利

JP2001216678A OPTICAL PICKUP DEVICE 失效
公开(公告)号：JP2001216678A
公开(公告)日：2001-08-10
申请号：JP2000387817
申请日：2000-12-20
申请人： SAMSUNG ELECTRONICS CO LTD
发明人： KIM TAE-KYUNG , CHUNG CHONG-SAM , AHN YOUNG-MAN , SUH HEA-JUNG
IPC分类号： G02B13/00 , G02B13/18 , G11B7/0037 , G11B7/12 , G11B7/125 , G11B7/1275 , G11B7/135 , G11B7/1372 , G11B7/1374
摘要： PROBLEM TO BE SOLVED: To provide a compatible type optical pickup device using laser beams of two wavelengths different each other in wavelength band. SOLUTION: One photodetector is used, and the part having negative power and the part having positive power of an objective lens are joined into one. When focal distances of respective parts of the objective lens from the light source side of the objective lens are expressed by f1, f2 and the Abbe numbers in the d line of optical material in respective parts are respectively expressed by v1, v2, the inequality expressed by 0

7. 发明专利

JP2002334478A METHOD OF DISCRIMINATING LAND/GROOVE AND OPTICAL RECORDING AND REPRODUCING DEVICE 审中-公开
公开(公告)号：JP2002334478A
公开(公告)日：2002-11-22
申请号：JP2001365291
申请日：2001-11-29
申请人： SAMSUNG ELECTRONICS CO LTD
发明人： AHN YOUNG-MAN , CHUNG CHONG-SAM , KIM TAE-KYUNG , SUH HEA-JUNG , KIM JONG-BAE
IPC分类号： G11B7/004 , G11B7/007 , G11B7/085 , G11B7/09 , G11B7/125 , G11B7/13 , G11B7/131 , G11B7/135 , G11B7/1369 , G11B7/1392
摘要： PROBLEM TO BE SOLVED: To provide a method of discriminating lands/grooves and an optical recording and reproducing device. SOLUTION: The method of discriminating the lands/grooves capable of discriminating the lands/grooves by irradiating a land/groove type optical disk with a light beam through an optical element which gives rise to a thickness change effect of the optical disk and is variable in the various degrees of this thickness change effect, segmenting the reflected/diffracted light beam of the optical disk to an inner light region and outer light region, detecting the same, driving the optical element and detecting the change in the signal obtained by differentiating the detection signal of the inner light region and the detection signal of the outer light region while changing the various degrees of this thickness change effect of the optical disk and the optical recording and reproducing device.

8. 发明专利

JP2001297479A OBJECTIVE LENS DEVICE AND OPTICAL PICKUP DEVICE USING IT 失效
公开(公告)号：JP2001297479A
公开(公告)日：2001-10-26
申请号：JP2000393611
申请日：2000-12-25
申请人： SAMSUNG ELECTRONICS CO LTD
发明人： CHUNG CHONG-SAM , KIM TAE-KYUNG , AHN YOUNG-MAN , SUH HEA-JUNG
IPC分类号： G02B5/32 , G02B13/00 , G02B13/18 , G11B7/125 , G11B7/127 , G11B7/135 , G11B7/1353 , G11B7/1374 , G11B7/1378 , G11B7/1392
摘要： PROBLEM TO BE SOLVED: To provide an objective lens device wherein chromatic aberation due to wavelength variation is compensated effectively that is caused by power change of a light source when the mode is switched over and to provide an optical pickup device using it. SOLUTION: The objective lens device is provided with an aspherical lens element that oppositely faces a disk and that has a prescribed first focal distance and a prescribed numerical aperture, and is also provided with a hologram lens that is placed adjacently to the aspherical lens element, that has a focal distance longer than the first, and that has a diffraction grating for compensating the chromatic aberration due to variation of the wavelength of a laser beam having a wavelength of 670 nm or less. This objective lens efficiently compensates wavelength variation due to a power change of the laser beam and the consequent aberration, at the time of switching recording and reproduction for a DVD or an HD-DVD. Since this objective lens device is constituted of one aspherical lens element and one hologram lens element, difficulty of selection of the material is eliminated for each lens element and an optical pickup device that employs this lens device can be made compact.

9. 发明专利

JP2001195772A OPTICAL PICKUP DEVICE 失效
公开(公告)号：JP2001195772A
公开(公告)日：2001-07-19
申请号：JP2000329182
申请日：2000-10-27
申请人： SAMSUNG ELECTRONICS CO LTD
发明人： KIM TAE-KYUNG , CHUNG CHONG-SAM , AHN YOUNG-MAN , SUH HEA-JUNG
IPC分类号： G11B7/005 , G11B7/095 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup device constituted in such a manner that the spherical aberrations by the deviation in the thickness of an optical disk and the fluctuation in wavelength and the comatic aberrations by the inclination of the optical disk are corrected by forming at least two light spots so as to be focused at the optical disk. SOLUTION: This optical pickup device includes a light source which projects light, an optical path changing means which changes the progression route of incident light, an objective lens, an optical branching means which branches the incident light to at least two beams of the light including the first and second light, a photodetector which has first and second photodetecting parts to respectively receive the first and second light reflected from the optical disk and made incident through the optical path changing means and a delay which delays the time of the second signal so as to match the synchronization between the first and second signals detected through the first photodetecting part and the second photodetecting part and subjected to photoelectric conversion. The device also includes a signal processing section which corrects the thickness deviation of the optical disk from the first and second signals matched in synchronization.

10. 发明专利

JP2000195089A OPTICAL PICKUP DEVICE 失效
公开(公告)号：JP2000195089A
公开(公告)日：2000-07-14
申请号：JP36566699
申请日：1999-12-22
申请人： SAMSUNG ELECTRONICS CO LTD
发明人： SUH HEA-JUNG , CHUNG CHONG-SAM , AHN YOUNG-MAN
IPC分类号： G11B7/135 , G11B7/005 , G11B7/09 , G11B7/125 , G11B7/1359 , G11B7/1365 , G11B7/1372 , G11B7/1398
摘要： PROBLEM TO BE SOLVED: To reduce crosstalks by condensing one spot to a main track, condensing other spots over adjacent tracks without a time difference to the optical spot condensed to the main track, multiplying an adjacent track signal without the time difference by an operation constant, and differentiating the signal from a signal detected from the main track. SOLUTION: In an operation part 50, a first and a second current-voltage converter 51 and 52 of a photodetector 45 convert current signals output after photoelectrically converted from a first and a second light-receiving parts A and B to voltage signals. A multiplier 55 multiplies the voltage values by an operation constant. A differential amplifier 56 differentially amplifies an output signal of the first current-voltage converter 51 and an output signal of the multiplier 55 and outputs an information signal (RF signal) with crosstalks removed. The operation part 50 is preferably provided with a first and a second equalizers 53 and 54 to compensate for deterioration of frequency characteristics generated when signals pass, or the like.

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