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公开(公告)号：US20070253073A1
公开(公告)日：2007-11-01
申请号：US11787068
申请日：2007-04-13
IPC分类号： G02B3/00
CPC分类号： C03C3/068 , C03B11/08 , C03B2215/49 , C03B2215/69 , C03C3/095 , Y02P40/57 , Y10T428/31504
摘要： Lens aberration in an objective lens for recording and reproducing optical information, which is composed of a molded aspherical single lens, is inhibited while at the same time good lens productivity is attained. Also attained are excellent optical properties and high production efficiency in a mold processing step and a press molding step conducted to manufacture the lens. To this end there is provided an objective lens 1 having a convex aspherical surface formed at a first surface and a numerical aperture NA which satisfies the condition NA≧0.8. It is preferable to have an aspherical surface also at the second surface. A molding material that was premolded to a prescribed shape and is in a heated and softened state is press molded by using a pair of upper and lower molds having opposing molding surfaces, a molding surface shape is transferred by using a spherical molding material with a radius r and pressing the molding material between a pair of upper and lower molds, and the paraxial curvature radius R of the convex aspherical surface satisfies the following relation r/R≦1.35.
摘要翻译： 用于记录和再现光学信息的物镜中的由模制的非球面单透镜组成的透镜像差被抑制，同时获得良好的透镜生产率。 在模具加工步骤和进行制造透镜的压制成型步骤中也获得了优异的光学性能和高生产效率。 为此，提供一种具有形成在第一表面上的凸非球面的物镜1和满足条件NA> = 0.8的数值孔径NA。 优选在第二表面也具有非球面。 将预成型为规定形状并处于加热软化状态的成型材料通过使用具有相对成型面的一对上下模具进行加压成型，通过使用具有半径的球形成型材料转印成型面形状 并且在一对上模和下模之间挤压成型材料，并且凸非球面的近轴曲率半径R满足以下关系r / R <= 1.35。
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公开(公告)号：US5166830A
公开(公告)日：1992-11-24
申请号：US590214
申请日：1990-09-28
申请人： Isao Ishibai , Hideaki Koyanagi , Hitonobu Otsu
发明人： Isao Ishibai , Hideaki Koyanagi , Hitonobu Otsu
CPC分类号： G02B13/18 , G02B13/00 , G06K7/10702
摘要： In an optical lens system for use in combination with a bar code sensor, first and second meniscus lenses are arranged back to back along an optical axis on object and image sides, respectively, and are identical in configuration and optical charcteristics with each other. Each meniscus lens has effective aspherical surfaces defined by predetermined formulae. On the assumption that the first and the second meniscus lenses have the same refractive index, the optical lens system satisfies the following formulae:0.25
摘要翻译： 在与条形码传感器组合使用的光学透镜系统中，第一和第二弯月透镜分别沿对象和图像侧的光轴背靠背布置，并且在结构和光学特性上彼此相同。 每个弯月透镜具有由预定公式限定的有效非球面。 假设第一和第二弯月透镜具有相同的折射率，光学透镜系统满足以下公式：0.25 <（r1 / r2）/（n /（n-1））<0.5。 1.2
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公开(公告)号：US07212485B2
公开(公告)日：2007-05-01
申请号：US10823000
申请日：2004-04-13
IPC分类号： G11B7/00
CPC分类号： C03C3/068 , C03B11/08 , C03B2215/49 , C03B2215/69 , C03C3/095 , Y02P40/57 , Y10T428/31504
摘要： Lens aberration in an objective lens for recording and reproducing optical information, which is composed of a molded aspherical single lens, is inhibited while at the same time good lens productivity is attained. Also attained are excellent optical properties and high production efficiency in a mold processing step and a press molding step conducted to manufacture the lens. To this end there is provided an objective lens 1 having a convex aspherical surface formed at a first surface and a numerical aperture NA which satisfies the condition NA≧0.8. It is preferable to have an aspherical surface also at the second surface. A molding material that was premolded to a prescribed shape and is in a heated and softened state is press molded by using a pair of upper and lower molds having opposing molding surfaces, a molding surface shape is transferred by using a spherical molding material with a radius r and pressing the molding material between a pair of upper and lower molds, and the paraxial curvature radius R of the convex aspherical surface satisfies the following relation r/R≦1.35.
摘要翻译： 用于记录和再现光学信息的物镜中的由模制的非球面单透镜组成的透镜像差被抑制，同时获得良好的透镜生产率。 在模具加工步骤和进行制造透镜的压制成型步骤中也获得了优异的光学性能和高生产效率。 为此，提供一种具有形成在第一表面上的凸非球面的物镜1和满足条件NA> = 0.8的数值孔径NA。 优选在第二表面也具有非球面。 将预成型为规定形状并处于加热软化状态的成型材料通过使用具有相对成型面的一对上下模具进行加压成型，通过使用具有半径的球形成型材料转印成型面形状 并且在一对上模和下模之间挤压成型材料，并且凸非球面的近轴曲率半径R满足以下关系r / R <= 1.35。
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公开(公告)号：US20050053788A1
公开(公告)日：2005-03-10
申请号：US10823000
申请日：2004-04-13
CPC分类号： C03C3/068 , C03B11/08 , C03B2215/49 , C03B2215/69 , C03C3/095 , Y02P40/57 , Y10T428/31504
摘要： Theme To inhibit the lens aberration in an objective lens for recording and reproducing optical information, which is composed of a molded aspherical single lens, while attaining at the same time good lens productivity, and also to ensure excellent optical properties and to obtain a high production efficiency in a mold processing step and a press molding step conducted to manufacture the lens. Means for Solving the Problems An objective lens 1 is a lens wherein a convex aspherical surface is formed at the first surface and a numerical aperture NA satisfies the condition, NA≧0.8. It is preferable to have an aspherical surface also at the second surface. A molding material that was premolded to a prescribed shape and is in a heated and softened state is press molded by using a pair of upper and lower molds having opposing molding surfaces, a molding surface shape is transferred by using a spherical molding material with a radius r and pressing the molding material between a pair of upper and lower molds, and the paraxial curvature radius R of the convex aspherical surface satisfies the following relation r/R≦1.35. The objective lens optical system comprises an objective lens 1 and a cover glass (CG) 2.
摘要翻译： 主题为了抑制用于记录和再现光学信息的物镜中的透镜像差，其由模制的非球面单透镜组成，同时同时获得良好的透镜生产率，并且还确保优异的光学性能并获得高生产率 进行模具加工工序的效率和进行制造透镜的压制成型步骤。 解决问题的方案物镜1是在第一表面形成凸非球面并且数值孔径NA满足条件NA = 0.8的透镜。 优选在第二表面也具有非球面。 将预成型为规定形状并处于加热软化状态的成型材料通过使用具有相对成型面的一对上下模具进行加压成型，通过使用具有半径的球形成型材料转印成型面形状 并且在一对上模和下模之间挤压成型材料，并且凸非球面的近轴曲率半径R满足以下关系r / R <= 1.35。 物镜光学系统包括物镜1和盖玻璃（CG）2。
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公开(公告)号：US07345829B2
公开(公告)日：2008-03-18
申请号：US11787068
申请日：2007-04-13
CPC分类号： C03C3/068 , C03B11/08 , C03B2215/49 , C03B2215/69 , C03C3/095 , Y02P40/57 , Y10T428/31504
摘要： Lens aberration in an objective lens for recording and reproducing optical information, which is composed of a molded aspherical single lens, is inhibited while at the same time good lens productivity is attained. Also attained are excellent optical properties and high production efficiency in a mold processing step and a press molding step conducted to manufacture the lens. To this end there is provided an objective lens 1 having a convex aspherical surface formed at a first surface and a numerical aperture NA which satisfies the condition NA≧0.8. It is preferable to have an aspherical surface also at the second surface. A molding material that was premolded to a prescribed shape and is in a heated and softened state is press molded by using a pair of upper and lower molds having opposing molding surfaces, a molding surface shape is transferred by using a spherical molding material with a radius r and pressing the molding material between a pair of upper and lower molds, and the paraxial curvature radius R of the convex aspherical surface satisfies the following relation r/R≦1.35.
摘要翻译： 用于记录和再现光学信息的物镜中的由模制的非球面单透镜组成的透镜像差被抑制，同时获得良好的透镜生产率。 在模具加工步骤和进行制造透镜的压制成型步骤中也获得了优异的光学性能和高生产效率。 为此，提供一种具有形成在第一表面上的凸非球面的物镜1和满足条件NA> = 0.8的数值孔径NA。 优选在第二表面也具有非球面。 将预成型为规定形状并处于加热软化状态的成型材料通过使用具有相对成型面的一对上下模具进行加压成型，通过使用具有半径的球形成型材料转印成型面形状 并且在一对上模和下模之间挤压成型材料，并且凸非球面的近轴曲率半径R满足以下关系r / R <= 1.35。
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6.发明授权Object lens and optical head for reproducing data from optical disks in different thickness of substrate 失效对象透镜和光学头，用于从不同厚度的基板的光盘再现数据
公开(公告)号：US5889748A
公开(公告)日：1999-03-30
申请号：US772874
申请日：1996-12-26
申请人： Takeshi Shimano , Masayuki Inoue , Akira Arimoto , Hiroyuki Minemura , Hisao Fujita , Hideaki Koyanagi
发明人： Takeshi Shimano , Masayuki Inoue , Akira Arimoto , Hiroyuki Minemura , Hisao Fujita , Hideaki Koyanagi
CPC分类号： G11B7/1381 , G11B7/1367 , G11B7/1374 , G11B7/139 , G11B2007/0006 , G11B2007/13727
摘要： The objective lens has a numerical aperture NA=0.6 when reproducing a DVD having a thickness of 0.6 mm and NA=0.42 when reproducing a CD having a thickness of 1.2 mm. At a boundary of NA 0.42, a slight stepped portion is formed so as to establish a phase difference. In this case, a designed wavelength is 0.635 .mu.m, and an optimum designed substrate thickness of a central portion is approximately 0.8 mm. While the DVD is reproduced, wave front aberration is on the order of 0.025.lambda., and jitter contained in the reproduction signal of the CD is equivalent to the present jitter. As a consequence, such an objective lens and an optical head with employment of this objective lens are provided, which precisely reproduce signals from the CD having the substrate thickness of 1.2 mm, and the DVD having the substrate thickness of 0.6 mm.
摘要翻译： 当再现厚度为1.2mm的CD时，物镜在再现厚度为0.6mm的DVD和NA = 0.42时具有数值孔径NA = 0.6。 在NA 0.42的边界处，形成一个微小的台阶部分以形成相位差。 在这种情况下，设计波长为0.635μm，中心部分的最佳设计基板厚度为约0.8mm。 当DVD被再现时，波前像差在0.025λ的数量级，并且包含在CD的再现信号中的抖动等于当前的抖动。 因此，提供这样的物镜和使用这种物镜的光学头，其精确地再现了具有1.2mm的衬底厚度的CD的信号，以及具有0.6mm的衬底厚度的DVD。
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