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1. 发明申请

US20050062916A1 Laminated phase plate and optical pickup using thereof 审中-公开
标题翻译：层叠相位板及使用其的光学拾取器
公开(公告)号：US20050062916A1
公开(公告)日：2005-03-24
申请号：US10852809
申请日：2004-05-25
申请人： Hiroshi Matsumoto , Masayuki Ooto , Satoshi Kaizawa
发明人： Hiroshi Matsumoto , Masayuki Ooto , Satoshi Kaizawa
IPC分类号： G02B5/30 , G02B27/28 , G11B7/135 , G11B7/1365 , G02F1/1335
CPC分类号： G11B7/1365 , G02B5/3083
摘要： It is an object of the present invention to provide a wave plate which functions as a 1/4 wave plate where wave front aberration, temperature characteristics, and incident angle dependence are improved with respect to a plurality of wavelengths of an optical pickup unit or the like compatible with DVD and CD, and an optical pickup using the wave plate. In the laminated wave plate where a wave plate whose phase difference is a with respect to a monochromatic light of a wavelength λ and a wave plate whose phase difference is β are laminated so that their optical axes cross, and which the laminated wave plate functions as the 1/4 wave plate, a relationship between the phase difference a and the phase difference β satisfies the following condition: α=πn β=πm/2 however, n>1, and m>1 a material of one wave plate is a film having birefringence characteristics and a material of the other wave plate is quarts.
摘要翻译：本发明的目的是提供一种作为1/4波片的波片，其波长像差，温度特性和入射角依赖性相对于光学拾取单元的多个波长或如DVD和CD兼容，以及使用波片的光学拾取器。在层叠波片中，相对于波长λ的单色光和相位差为β的波片的相位差为a的波片被层叠，使得它们的光轴交叉，层叠波片作为 1/4波片，相位差a和相位差β之间的关系满足以下条件：α= pin beta = pim / 2然而，n> 1，并且m≥1，一个波片的材料是具有双折射特性的膜和另一个波片的材料是夸脱的。

2. 发明授权

US07352678B2 Laminated wave plate and optical pickup using the same 有权
标题翻译：层压波片和光拾取器采用相同的
公开(公告)号：US07352678B2
公开(公告)日：2008-04-01
申请号：US10512698
申请日：2003-04-24
申请人： Masayuki Ooto
发明人： Masayuki Ooto
IPC分类号： G11B7/00
CPC分类号： G11B7/1365 , G02B5/3083 , G11B7/1275 , G11B2007/0006
摘要： A conventional broadband quarter-wave plate has not completely solved the wavelength dependence and has different efficiencies of shifting the phase by 90° depending on the wavelengths, and therefore has a problem that it cannot fulfill the strict specifications on the optical characteristics which are demanded of a wave plate from a viewpoint of the optical efficiency and the like in an optical pickup device compatible with a plurality of different wavelengths. To provide a wave plate which completely functions as a quarter-wave plate with respect to a plurality of different wavelengths and an optical pickup using that wave plate to solve the problem, the present invention provides a laminated wave plate, wherein a wave plate with a phase difference α and a wave plate with a phase difference β with respect to monochromatic light with a wavelength λ are laminated in such a way that directions of optical axes of said plates intersect each other, so that the laminated wave plate, as a whole, functions as a quarter-wave plate, and which is characterized in that a relationship between the α and the β satisfies the following formulas: (3/2)×π≠α−2×π×(m−1) π≠β−2×π×(n−1), wherein: each of m and n is a positive integer.
摘要翻译：常规的宽带四分之一波长板尚未完全解决波长依赖性，并且根据波长将相位相移90°具有不同的效率，因此存在不能满足对要求的光学特性的严格规格的问题在与多个不同波长相容的光学拾取装置中从光学效率等的观点出发的波片。为了提供相对于多个不同波长完全用作四分之一波片的波片和使用该波片的光学拾取器来解决问题，本发明提供了一种叠层波片，其中具有相位差α相对于具有波长λ的单色光具有相位差β的波片以这样的方式层叠，使得所述板的光轴的方向彼此相交，使得叠层波片整体上，用作四分之一波片，其特征在于α和β之间的关系满足以下公式：<？in-line-formula description =“In-line formula”end =“lead”？>（ 3/2）xpi <> alpha-2xpix（m-1）<？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line 公式“end =”lead“？> pi <β-2xpix（n-1），<？in-line-formula description =”In-line Formulas“end =”tail“？> ein：m和n中的每一个是正整数。

3. 发明授权

US07664002B2 Laminated wave plate and optical pickup using the same 失效
标题翻译：层压波片和光拾取器采用相同的
公开(公告)号：US07664002B2
公开(公告)日：2010-02-16
申请号：US12001392
申请日：2007-12-11
申请人： Masayuki Ooto
发明人： Masayuki Ooto
IPC分类号： G02B5/30
CPC分类号： G11B7/1365 , G02B5/3083 , G11B7/1275 , G11B2007/0006
摘要： A conventional broadband quarter-wave plate has not completely solved the wavelength dependence and has different efficiencies of shifting the phase by 90° depending on the wavelengths, and therefore has a problem that it cannot fulfill the strict specifications on the optical characteristics which are demanded of a wave plate from a viewpoint of the optical efficiency and the like in an optical pickup device compatible with a plurality of different wavelengths. To provide a wave plate which completely functions as a quarter-wave plate with respect to a plurality of different wavelengths and an optical pickup using that wave plate to solve the problem, the present invention provides a laminated wave plate, wherein a wave plate with a phase difference α and a wave plate with a phase difference β with respect to monochromatic light with a wavelength λ are laminated in such a way that directions of optical axes of said plates intersect each other, so that the laminated wave plate, as a whole, functions as a quarter-wave plate, and which is characterized in that a relationship between the α and the β satisfies the following formulas: (3/2)×π≠α−2×π×(m−1) π≠β−2×π×(n−1), wherein: each of m and n is a positive integer.
摘要翻译：常规的宽带四分之一波长板尚未完全解决波长依赖性，并且根据波长将相位相移90°具有不同的效率，因此存在不能满足对要求的光学特性的严格规格的问题在与多个不同波长相容的光学拾取装置中从光学效率等的观点出发的波片。为了提供相对于多个不同波长完全用作四分之一波片的波片和使用该波片的光学拾取器来解决问题，本发明提供了一种叠层波片，其中具有相位差α相对于具有波长λ的单色光具有相位差β的波片以这样的方式层叠，使得所述板的光轴的方向彼此相交，使得叠层波片整体上，（3/2）xpialpha-2xpix（m-1）pibeta-2xpix（n-1），其中α和β之间的关系满足以下公式：其中：m和n分别为正整数。

4. 发明申请

US20080180799A1 Laminated wave plate and optical pickup using the same 失效
标题翻译：层压波片和光拾取器采用相同的
公开(公告)号：US20080180799A1
公开(公告)日：2008-07-31
申请号：US12001392
申请日：2007-12-11
申请人： Masayuki Ooto
发明人： Masayuki Ooto
IPC分类号： G02B5/30 , G01J4/00
CPC分类号： G11B7/1365 , G02B5/3083 , G11B7/1275 , G11B2007/0006
摘要： A conventional broadband quarter-wave plate has not completely solved the wavelength dependence and has different efficiencies of shifting the phase by 90° depending on the wavelengths, and therefore has a problem that it cannot fulfill the strict specifications on the optical characteristics which are demanded of a wave plate from a viewpoint of the optical efficiency and the like in an optical pickup device compatible with a plurality of different wavelengths. To provide a wave plate which completely functions as a quarter-wave plate with respect to a plurality of different wavelengths and an optical pickup using that wave plate to solve the problem, the present invention provides a laminated wave plate, wherein a wave plate with a phase difference α and a wave plate with a phase difference β with respect to monochromatic light with a wavelength λ are laminated in such a way that directions of optical axes of said plates intersect each other, so that the laminated wave plate, as a whole, functions as a quarter-wave plate, and which is characterized in that a relationship between the α and the β satisfies the following formulas: (3/2)×π≠α=2×π×(m−1) π≠β=2×π×(n−1) wherein: each of m and n is a positive integer.
摘要翻译：常规的宽带四分之一波长板尚未完全解决波长依赖性，并且根据波长将相位相移90°具有不同的效率，因此存在不能满足对要求的光学特性的严格规格的问题在与多个不同波长相容的光学拾取装置中从光学效率等的观点出发的波片。为了提供相对于多个不同波长完全用作四分之一波片的波片和使用该波片的光学拾取器来解决问题，本发明提供了一种叠层波片，其中具有相位差α相对于具有波长λ的单色光具有相位差β的波片以这样的方式层叠，使得所述板的光轴的方向彼此相交，使得叠层波片整体上，用作四分之一波片，其特征在于α和β之间的关系满足以下公式：<？in-line-formula description =“In-line formula”end =“lead”？>（ 3/2）xpi <> alpha = 2xpix（m-1）<？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line 公式“end =”lead“？> pi <> beta = 2xpix（n-1）<？in-line-formula description =”In-line Formulas“end =”tail“？> where in：m和n分别为正整数。

5. 发明申请

US20050180296A1 Laminate wavelength plate and optical pickup using it 有权
标题翻译：层压波长板和光学拾音器使用它
公开(公告)号：US20050180296A1
公开(公告)日：2005-08-18
申请号：US10512698
申请日：2003-04-24
申请人： Masayuki Ooto
发明人： Masayuki Ooto
IPC分类号： G11B7/1365 , G02B5/30 , G11B7/00
CPC分类号： G11B7/1365 , G02B5/3083 , G11B7/1275 , G11B2007/0006
摘要： A conventional broadband quarter-wave plate has not completely solved the wavelength dependence and has different efficiencies of shifting the phase by 90° depending on the wavelengths, and therefore has a problem that it cannot fulfill the strict specifications on the optical characteristics which are demanded of a wave plate from a viewpoint of the optical efficiency and the like in an optical pickup device compatible with a plurality of different wavelengths. To provide a wave plate which completely functions as a quarter-wave plate with respect to a plurality of different wavelengths and an optical pickup using that wave plate to solve the problem, the present invention provides a laminated wave plate, wherein a wave plate with a phase difference α and a wave plate with a phase difference β with respect to monochromatic light with a wavelength λ are laminated in such a way that directions of optical axes of said plates intersect each other, so that the laminated wave plate, as a whole, functions as a quarter-wave plate, and which is characterized in that a relationship between the α and the β satisfies the following formulas: (3/2)×π≠α−2×π×([[n]]m−1) π≠β−2×π×(n−1),wherein: each of m and n is a positive integer.
摘要翻译：常规的宽带四分之一波长板尚未完全解决波长依赖性，并且根据波长将相位相移90°具有不同的效率，因此存在不能满足对要求的光学特性的严格规格的问题在与多个不同波长相容的光学拾取装置中从光学效率等的观点出发的波片。为了提供相对于多个不同波长完全用作四分之一波片的波片和使用该波片的光学拾取器来解决问题，本发明提供了一种叠层波片，其中具有相位差α相对于具有波长λ的单色光具有相位差β的波片以这样的方式层叠，使得所述板的光轴的方向彼此相交，使得叠层波片整体上，用作四分之一波片，其特征在于α和β之间的关系满足以下公式：<？in-line-formula description =“In-line formula”end =“lead”？>（ 3/2）xpi <> alpha-2xpix（[[n]] m-1）<？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“在线公式”end =“lead”？> pi <β-2xpix（n-1），<？in-line-formula description =“In-line Formulas”end =“tail”？> 其中：m和n分别为正整数。

6. 发明申请

US20070183297A1 Compositive wave plate 审中-公开
标题翻译：复合波片
公开(公告)号：US20070183297A1
公开(公告)日：2007-08-09
申请号：US10825805
申请日：2004-04-15
申请人： Masayuki Ooto
发明人： Masayuki Ooto
IPC分类号： G11B7/00
CPC分类号： G02B5/3083 , G11B7/1263 , G11B7/1365
摘要： The invention is intended to solve the problem of a phase shift by the incidence angle dependence of a composite wave plate which is caused when divergent light is incident directly thereon because of occurrence of a phase shift in addition to a desired phase difference of the composite wave plate. The composite wave plate is composed of two laminated wave plates, and respective parameters are set such that: letting θ1 represent the azimuth angle of the optical axis of the first wave plate with respect to the plane of polarization of incident light thereon in the Poincare sphere representation, θ2 represent the azimuth angle of the optical axis of the second wave plate with respect to the plane of polarization of incident light thereon in the Poincare sphere representation, Γ1 represent a phase rotation about the axis of rotation R1 of the first wave plate in the Poincare sphere representation, and Γ2 represent a phase rotation about the axis of rotation R2 of the second wave plate in the Poincare sphere representation, θ2−θ1≠π/2;and that a phase difference ΓT of the composite wave plate satisfies ΓT=(2×θ1−π/2)cos Γ1+(2×θ2−π)cos Γ2.
摘要翻译：本发明旨在解决由于发生光直接在其上直接入射的复合波片的入射角依赖性而导致的相移问题，因为除了复合波的期望的相位差之外，出现相移盘子。复合波片由两层叠波片构成，各参数设定为：使波多角度1表示在庞加莱相对于其上的入射光的偏振面的第一波片的光轴的方位角球面表示，θ2表示在庞加莱球表示中相对于其上的入射光的偏振平面的第二波片的光轴的方位角，伽马1表示围绕旋转轴的旋转轴线R 1的相位旋转庞加莱球表示中的第一波片，伽马2表示庞加莱球表示中的第二波片的旋转轴线R 2的相位旋转，<？在线公式描述=“在线公式”结束 =“铅”→θ2-θ1<π/ 2; <？in-line-formula description =“In-line Formulas”end =“tail”？>，并且复合波片的相位差GammaT满足 <？in-line-formula des cription =“在线公式”end =“lead”？> GammaT =（2xtheta 1 -pi / 2）cos Gamma 1 +（2xtheta 2 -pi）cos Gamma 2. <？in-line-formula description =“In “公式”end =“tail”？>

7. 发明授权

US07224661B2 Wave plate and optical pickup unit using the same 有权
标题翻译：波片和光拾取单元使用相同
公开(公告)号：US07224661B2
公开(公告)日：2007-05-29
申请号：US10828055
申请日：2004-04-20
申请人： Masayuki Ooto
发明人： Masayuki Ooto
IPC分类号： G11B7/00
CPC分类号： G11B7/1365
摘要： As a ½ wave plate constituted by laminating two wave plates, a wave plate where temperature dependence of a phase difference is reduced is provided. In a wave plate constituted by laminating a first wave plate having a phase difference τ1 (deg.) and an optical axis azimuth θ1 (deg.), and a second wave plate having a phase difference τ2 (deg.) and an optical axis azimuth θ2 (deg.), the phase difference τ1 (deg.) of the first wave plate and the phase difference τ2 (deg.) of the second wave plate are set to 360n+180 (n=0, 1, 2 . . . ), and an angle formed by polarization planes of incident light and emitted light is θ (deg.). In this case, the first wave plate and the second wave plate are laminated so as to satisfy θ1=(90+θ/2)/2 and θ2=θ1+90+θ/2.
摘要翻译：作为通过层叠两个波片构成的1/2波片，提供了相位差的温度依赖性降低的波片。在通过层叠具有相位差τ1（度）和光轴方位角θ1（deg）的第一波片构成的波片中，具有相位差τ2（°）和光轴方位角θ2（°）的波片，相位差τ1（θ）第一波片的相位差（deg）和第二波片的相位差τ2（度）设定为360n + 180（n = 0,1,2 ...），并且由入射光和发射光的偏振面形成的角度是θ（度）。在这种情况下，第一波片和第二波片被层叠以满足θ1 =（90 +θ/ 2）/ 2和θ2 1 + 90 +θ/ 2。

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