-
公开(公告)号：US06891675B2
公开(公告)日：2005-05-10
申请号：US10315067
申请日：2002-12-10
Applicant: Minoru Ohyama
Inventor： Minoru Ohyama
CPC classification number: G11B7/131 , G11B7/0903 , G11B7/0912 , G11B7/123 , G11B7/1275 , G11B7/1353 , G11B2007/0006
Abstract: There is disclosed an optical device in which a first light source for outputting a first wavelength light is apart from a second light source for outputting a second wavelength light by a predetermined distance. An information recording medium is irradiated with the first and second wavelength lights transmitted through a holographic optical element having first and second diffraction areas. The first and second diffraction areas are provided with grating arrangements in which grating axis directions are parallel to each other and grating pitches are different from each other. The first and second wavelength lights reflected by the information recording medium are transmitted through the holographic optical element and diffracted by the first and second diffraction areas. The first and second wavelength diffracted lights by the first diffraction area are converged to much the same first position on a light receiving element substrate, and the first and second wavelength diffracted lights by the second diffraction area are converged to substantially the same second position on the light receiving element substrate. First and second light receiving elements are disposed in the first and second positions, respectively.
Abstract translation: 公开了一种光学装置，其中用于输出第一波长光的第一光源与用于将第二波长光输出预定距离的第二光源分开。 照射通过具有第一和第二衍射区域的全息光学元件透射的第一和第二波长光的信息记录介质。 第一和第二衍射区域设置有光栅布置，其中光栅轴方向彼此平行并且光栅间距彼此不同。 由信息记录介质反射的第一和第二波长光通过全息光学元件透射并被第一和第二衍射区衍射。 通过第一衍射区域的第一和第二波长衍射光在光接收元件基板上会聚到大致相同的第一位置，并且第二衍射区域的第一和第二波长衍射光会聚到大致相同的第二位置上 光接收元件基板。 第一和第二光接收元件分别设置在第一和第二位置。
-
公开(公告)号：US06320837B1
公开(公告)日：2001-11-20
申请号：US09420131
申请日：1999-10-18
Applicant: Minoru Ohyama
Inventor： Minoru Ohyama
IPC: G11B700
CPC classification number: G11B7/1353 , G11B7/123 , G11B7/1275 , G11B2007/0006
Abstract: A point where a first diffraction grating and an incident optical axis intersect is named as first intersection point, lengths from the first intersection point to points where ±primary-order diffracted lights by the first diffraction grating intersect a light receiving plane are named as first-a(1a) optical path length, first-b(1b) optical path length, and an average thereof is named as first average optical path length. A point where a second diffraction grating and the incident optical axis intersect is named as second intersection point, lengths from the second intersection point to points where ±primary-order diffracted lights by the second diffraction grating intersect a light receiving plane are named as second-a(2a) optical path length, second-b(2b) optical path length, and an average thereof is names as second average optical path length, At this time, the first diffraction grating, the second diffraction grating and the light receiving device substrate are disposed in such a way that a first curve in which the first average optical path length is constant and a second curve in which the second average optical path length is constant are in contact with each other at a single point.
Abstract translation: 第一衍射光栅和入射光轴相交的点被称为第一交点，从第一交点到第一衍射光栅的±一级衍射光与光接收面相交的点的长度被命名为第一交点， （1a）光路长度，第一b（1b）光路长度及其平均值被称为第一平均光程长度。 第二衍射光栅和入射光轴相交的点被称为第二交点，从第二交点到第二衍射光栅的±一级衍射光与光接收面相交的点的长度被命名为第二交点， （2a）光路长度，第二b（2b）光程长度及其平均值称为第二平均光程长度。此时，第一衍射光栅，第二衍射光栅和光接收装置基板 以使得第一平均光路长度恒定的第一曲线和第二平均光程长度恒定的第二曲线在单个点彼此接触的方式设置。
-
公开(公告)号：US5689108A
公开(公告)日：1997-11-18
申请号：US653629
申请日：1996-05-24
Applicant: Minoru Ohyama
Inventor： Minoru Ohyama
CPC classification number: G11B7/1353 , G11B7/123 , G11B7/126 , G11B7/131 , G11B7/1362 , G11B7/22
Abstract: A light beam generated by a laser diode travels straight through a holographic beam splitter and other optical elements without undergoing any optical modifications up to an information storage disk (disc), and a return beam reflected on the disk (disc) surface is diffracted and divided into two beams by the holographic beam splitter. The divided two beams are reflected by mirrors respectively and irradiate photo-detectors respectively. A monitoring beam is generated at the back of the laser diode, and is reflected by an additional mirror and irradiates an additional photodetector.
Abstract translation: 由激光二极管产生的光束直接通过全息分束器和其他光学元件，而不经历任何光学修改直到信息存储盘（盘），并且在盘（盘）表面上反射的返回光束被衍射和分割 由全息分束器分成两束。 分别由镜子反射并分别照射光电检测器。 在激光二极管背面产生一个监视光束，并被一个附加的反射镜反射并照射一个附加的光电探测器。
-
公开(公告)号：US5180909A
公开(公告)日：1993-01-19
申请号：US691963
申请日：1991-04-26
Applicant: Minoru Ohyama , Tetsuhiro Yamazaki , Hiroshi Inoue , Toshio Konno
Inventor： Minoru Ohyama , Tetsuhiro Yamazaki , Hiroshi Inoue , Toshio Konno
CPC classification number: G11B7/1353 , G11B7/124
Abstract: There is provided an optical pickup which emits a reading light to an optical disc having a pit in which information is stored and reads the information by means of the 0th order reflected light reflected from the pit and the diffracted light generated on the pit by diffraction effect. The optical pickup comprises a semiconductor laser for generating the reading light, a first photodiode for generatign a first electric signal corresponding to the intensity of the 0th order reflected light incident thereto, a second photodiode for generating a second electric signal corresponding to the intensity of the diffracted light incident thereto, a light focusing and guiding device for focusing the reading light to the pit and guiding the 0th order reflected light to the first photodiode, a light guiding device for guiding the diffracted light to the second photodiode and an operation device for generating an output signal by taking difference between the first and the second electric signals.
Abstract translation: 提供了一种光学拾取器，其向具有存储信息的凹坑的光盘发出读取光，并且通过衍射效应从凹坑反射的0级反射光和由凹坑产生的衍射光读取信息 。 光拾取器包括用于产生读取光的半导体激光器，用于生成对应于入射到其的第0级反射光的强度的第一电信号的第一光电二极管，用于产生对应于第二电信号的第二电信号的第二电信号 入射到其上的衍射光，用于将读取光聚焦到凹坑并将第0级反射光引导到第一光电二极管的光聚焦引导装置，用于将衍射光引导到第二光电二极管的导光装置和用于产生 通过取得第一和第二电信号之间的差异的输出信号。
-
-
-
Search Results
24
records
(took 0.015 seconds)
