-
公开(公告)号：JP2007265575A
公开(公告)日：2007-10-11
申请号：JP2006092204
申请日：2006-03-29
Inventor： SAITO MASAHIRO
Abstract: PROBLEM TO BE SOLVED: To detect a tracking error by optimizing a diffracted light intensity ratio to improve laser use efficiency in an optical pickup using optical beams of three different wavelengths. SOLUTION: This pickup is provided with first to third emission parts for emitting optical beams of three different wavelengths, a diffraction optical element 4 which is provided with, in at least one surface, a diffraction part 4a provided with a first phase grating part 31a having a first phase height with respect to a reference surface and second phase grating parts 31b having second phase heights with respect to the reference surface in both sides of the first phase grating part 31a so as to have 2-stage phase heights, on which optical beams emitted from the first to third emission parts and matched with one another in optical axis are made incident, and which devides the first to third optical beams into three beams, an objective lens 7 for condensing the emitted optical beams on the signal recording surface of an optical disk 8, and a photodetector 10B for detecting return optical beams reflected on the optical disk 8. COPYRIGHT: (C)2008,JPO&INPIT
Abstract translation: 要解决的问题：通过优化衍射光强度比来检测跟踪误差，以提高使用三种不同波长的光束的光学拾取器中的激光使用效率。 解决方案：该拾取器设置有用于发射三种不同波长的光束的第一至第三发射部件，在至少一个表面中设置有设置有第一相位光栅的衍射部分4a的衍射光学元件4 相对于基准面具有第一相位高度的部分31a和相对于第一相位光栅部分31a两侧的参考表面具有第二相位高度的第二相位光栅部分31b，以便具有两级相位高度， 将从第一至第三发光部分发射并在光轴上彼此匹配的光束入射，将第一至第三光束分为三束，用于将发射的光束会聚在信号记录上的物镜7 光盘8的表面和用于检测在光盘8上反射的返回光束的光电检测器10B。版权所有（C）2008，JPO＆INPIT
-
公开(公告)号：JP2007048373A
公开(公告)日：2007-02-22
申请号：JP2005231273
申请日：2005-08-09
Inventor： SAITO MASAHIRO
Abstract: PROBLEM TO BE SOLVED: To make the optical beam spot and intensity of light beams of the respective wavelengths of signal recording surfaces of a plurality of types of optical disks having protective plates different in thickness. SOLUTION: An optical pickup has a first light source of a first wavelength, a second light source of a second wavelength, a third light source of a third wavelength, an objective lens 33 to focus the optical beams from the first to third light sources on the signal recording surface of an optical disk, a collimator lens 36 disposed between the first to third light sources and the objective lens 33, and an optical diffraction element 34 disposed between the collimator lens and the objective lens 33. The optical diffraction element 34 has a first diffraction section 34a to diffract the optical beam of the second wavelength, and a second diffraction section 34b to diffract the optical beam of the third wavelength. In the second diffraction section 34b, first and second optical ring surfaces are formed continuously, which have radial-direction cross sections formed in free curved shapes. COPYRIGHT: (C)2007,JPO&INPIT
Abstract translation: 要解决的问题：使得具有不同厚度的保护板的多种类型的光盘的信号记录表面的各个波长的各个波长的光束点和强度。 解决方案：光拾取器具有第一波长的第一光源，第二波长的第二光源，第三波长的第三光源，物镜33，用于将来自第一至第三波长的光束 在光盘的信号记录表面上的光源，设置在第一至第三光源和物镜33之间的准直透镜36以及设置在准直透镜和物镜33之间的光学衍射元件34.光学衍射 元件34具有用于衍射第二波长的光束的第一衍射部分34a和衍射第三波长的光束的第二衍射部分34b。 在第二衍射部34b中，连续地形成第一和第二光学环表面，其具有形成为自由弯曲形状的径向横截面。 版权所有（C）2007，JPO＆INPIT
-
公开(公告)号：JP2005018961A
公开(公告)日：2005-01-20
申请号：JP2004120747
申请日：2004-04-15
Inventor： SAITO MASAHIRO , FUKAZAWA YOSHIO , TOYODA KIYOSHI , SUZUKI JUNICHI , KUBO MINORU , MURAKAMI SOICHI
CPC classification number: G11B7/1275 , G11B7/131 , G11B7/1353 , G11B7/1359 , G11B7/1395 , G11B7/22
Abstract: PROBLEM TO BE SOLVED: To simplify the positioning of a photodetector light-receiving surface or component, to reduce a manufacturing cost, and to enhance reliability. SOLUTION: This device comprises a light source 22 which emits a light of predetermined wavelength, an objective lens 27 which focuses an outgoing light emitted from the light source 22 on an optical disk 2, and which focuses a return light from the optical disk 2, and a beam splitter 25 which splits an optical-path of the return light reflected from the optical disk 2, and which makes the return light of which the optical-path has been split parallel to the outgoing light from the light source 22. Further, the device comprises a composite optical element having a dividing prism 30 which is located at the position where the return light of which the optical-path has been split enters and which spatially divides the return light, and light-receiving sections which obtains a focusing error signal by receiving a plurality of return lights spatially divided by the dividing prism 30, respectively. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract translation: 要解决的问题：为了简化光电检测器光接收表面或部件的定位，以降低制造成本，并提高可靠性。 解决方案：该装置包括发射预定波长的光的光源22，将从光源22发射的出射光聚焦在光盘2上并将来自光学器件的返回光聚焦的物镜27 光盘2和分束器25，其分离从光盘2反射的返回光的光路，并且使得光路已被分离的返回光平行于来自光源22的出射光 此外，该装置包括复合光学元件，该复合光学元件具有分隔棱镜30，该分割棱镜30位于其中已经分离光路的返回光进入并且空间上分开返回光的位置，以及获得的光接收部 通过分别通过分割棱镜30空间分割的多个返回光来接收聚焦误差信号。 版权所有（C）2005，JPO＆NCIPI
-
Patent Agency Ranking
公开(公告)号：JP2003077151A
公开(公告)日：2003-03-14
申请号：JP2001265435
申请日：2001-09-03
Inventor： SAITO MASAHIRO
Abstract: PROBLEM TO BE SOLVED: To enable the sufficient suppression of the offset of a tracking error signal due to the positional deviation of a diffraction grating as to an optical pickup and an optical disk device by applying to a mini-disk device, a recording/ reproducing device of DVD, etc. SOLUTION: The diffraction grating 14 is constituted by the repetition of at least three areas AR1, AR21 and AR22, AR3 having different optical distances, then the optical distances of widths W1, W21 and W22, W3 in three areas AR1, AR21 and AR22, AR3 are set so that the phase difference between a 0-order diffracted light and a ±1st order diffracted light becomes almost 0 deg. or 180 deg..
Abstract translation: 要解决的问题：为了能够通过施加到小型盘装置来充分抑制由于衍射光栅对于光学拾取器和光盘装置的位置偏移引起的跟踪误差信号的偏移，记录/再现 DVD等的装置。解决方案：衍射光栅14由至少三个具有不同光学距离的区域AR1，AR21和AR22，AR3的重复构成，然后三个区域中的宽度W1，W21和W22，W3的光学距离 AR1，AR21和AR22，AR3被设置为使得0级衍射光和±1级衍射光之间的相位差几乎变为0度。 或180度..
-
公开(公告)号：JP2009134841A
公开(公告)日：2009-06-18
申请号：JP2008001533
申请日：2008-01-08
Inventor： SAITO MASAHIRO , AIBA MOTOO , TOYODA KIYOSHI
CPC classification number: G02B27/0037 , G02B7/008 , G02B7/028 , G02B27/4238 , G02B27/4283 , G11B7/1374 , G11B7/1376 , G11B7/13925
Abstract: PROBLEM TO BE SOLVED: To provide an objective lens capable of improving a manufacturing yield, and to provide an optical pickup device using the objective lens. SOLUTION: The optical pickup device 1 includes: the light source 3 that emits a light beam of a predetermined wavelength of about 405 nm; the objective lens 7 being a plastic lens provided with diffraction means of a zone diffractive structure suppressing generation of aberration to be caused by a temperature change, and has a numerical aperture of 0.82 or larger for gathering the light beam; and a collimator lens 6. An amount of change of third-order spherical aberration to be generated in the objective lens in response to a temperature change and an amount of change of the third-order spherical aberration to be generated in the objective lens in response to a wavelength change satisfy a predetermined relation, and when a length of an optical path increase by the diffractive structure is represented by a predetermined optical path difference function, coefficients of the second term and the tenth term of the optical path difference satisfy a predetermined relation, an amount of change of third-order axial spherical aberration and that of fifth-order axial spherical aberration in the objective lens in response to the wavelength change satisfy a predetermined relation, and the generation of the spherical aberration to be caused by the temperature change can be suppressed in the objective lens 7, and when the light beam emitted from the light source is changed in wavelength, the generation of the spherical aberration can be suppressed by moving the collimator lens 6. COPYRIGHT: (C)2009,JPO&INPIT
Abstract translation: 解决的问题：提供能够提高制造成品率的物镜，并提供使用该物镜的光学拾取装置。 解决方案：光学拾取装置1包括：发射约405nm的预定波长的光束的光源3; 物镜7是设置有抑制由温度变化引起的像差产生的区域衍射结构的衍射装置的塑料透镜，并且具有0.82以上的数值孔径用于收集光束; 以及准直透镜6.响应于响应于在物镜中产生的三阶球面像差的温度变化和变化的量而在物镜中产生的三阶球面像差的变化量 波长变化满足预定关系，并且当由衍射结构增加的光路的长度由预定光程差函数表示时，光程差的第二项和第十项的系数满足预定关系 响应于波长变化的物镜中的三阶轴向球面像差的变化量和五阶轴向球面像差的变化量满足预定关系，并且由温度变化引起的球面像差的产生 可以在物镜7中被抑制，并且当从光源发射的光束波长变化时， 通过移动准直透镜6可以抑制球面像差的产生。版权所有（C）2009，JPO＆INPIT
-
公开(公告)号：JP2008298812A
公开(公告)日：2008-12-11
申请号：JP2007141308
申请日：2007-05-29
Inventor： SAITO MASAHIRO , FUJIWARA HIROTAKE , FUJIBAYASHI HIROKO
IPC: G03B21/16 , G02F1/1333 , G03B21/00
Abstract: PROBLEM TO BE SOLVED: To more easily cope with reduction in size and weight of a device than before even while cooling the interior of an enclosure suitably, in a liquid crystal projector device for displaying a projected image. SOLUTION: In the liquid crystal projector device, a light source 2 emitting light, an optical system unit 3 for projecting an image utilizing light emitted by the light source 3, a driving board 4 loaded with electronic parts for controlling the drive of the light source 2 and the optical system unit 3, and a cooling fan 5 for blowing air for cooling the interior of the enclosure 1 are provided in the enclosure 1. The driving board 4 loaded with the electronic parts is disposed collectively in one area in the enclosure 1. In the enclosure 1, the optical system unit 3, the driving board 4 loaded with the electronic parts and the light source 2 are respectively disposed to locate on one air duct, and the wind direction of the cooling air is controlled so that the cooling air of the cooling fan 5 follows the air duct. COPYRIGHT: (C)2009,JPO&INPIT
Abstract translation: 要解决的问题：为了更容易地应对装置的尺寸和重量的减小，即使在适当地冷却外壳的内部时，也可以在用于显示投影图像的液晶投影仪装置中。 解决方案：在液晶投影仪设备中，发射光的光源2，用于利用由光源3发射的光投影图像的光学系统单元3，装载有用于控制光源3的驱动的电子部件的驱动板4 光源2和光学系统单元3以及用于吹送用于冷却外壳1的内部的空气的冷却风扇5设置在外壳1中。装载有电子部件的驱动板4集中在一个区域中 在外壳1中，光学系统单元3，装载有电子部件的驱动板4和光源2分别设置在一个空气管道上，并且冷却空气的风向被控制为 冷却风扇5的冷却空气跟随风道。 版权所有（C）2009，JPO＆INPIT
-
公开(公告)号：JP2007048374A
公开(公告)日：2007-02-22
申请号：JP2005231274
申请日：2005-08-09
Inventor： SAITO MASAHIRO
CPC classification number: G02B27/42 , G02B27/4238 , G02B27/4294 , G11B7/1353 , G11B2007/0006
Abstract: PROBLEM TO BE SOLVED: To make the optical beam spot and intensity of light beams of the respective wavelengths of each signal recording surfaces of a plurality of types of optical disks having protective plates different in thickness. SOLUTION: An optical pickup has a first light source of a first wavelength, a second light source of a second wavelength, a third light source of a third wavelength, an objective lens 33 to focus the optical beams from the first to third light sources on the signal recording surface of an optical disk, a collimator lens 36 disposed between the first to third light sources and the objective lens 33 to make optical beams parallel light by changing their emission angles, and an optical diffraction element 34 disposed between the collimator lens and the objective lens 33. The optical diffraction element 34 has a first diffraction section 34a to diffract the optical beam of the second wavelength, and a second diffraction section 34b to diffract the optical beam of the third wavelength. In the second diffraction section 34b, a diffraction structure which has first to fourth optical ring surfaces in a flight of steps. COPYRIGHT: (C)2007,JPO&INPIT
Abstract translation: 要解决的问题：使得具有不同厚度的保护板的多种类型的光盘的每个信号记录表面的各个波长的光束的光束点和强度。 解决方案：光拾取器具有第一波长的第一光源，第二波长的第二光源，第三波长的第三光源，物镜33，用于将来自第一至第三波长的光束 在光盘的信号记录表面上的光源，设置在第一至第三光源之间的准直透镜36和物镜33，以通过改变其发射角使光束平行光;以及光学衍射元件34， 准直透镜和物镜33.光学衍射元件34具有用于衍射第二波长的光束的第一衍射部分34a和衍射第三波长的光束的第二衍射部分34b。 在第二衍射部分34b中，在步进的飞行中具有第一至第四光学环表面的衍射结构。 版权所有（C）2007，JPO＆INPIT
-
公开(公告)号：JP2006330382A
公开(公告)日：2006-12-07
申请号：JP2005154153
申请日：2005-05-26
Inventor： NASU TAKASHI , OKUBO TAKUJI , SAITO MASAHIRO , WADA YOSHIHISA
Abstract: PROBLEM TO BE SOLVED: To obtain a projection type display device capable of achieving the lowering of the temperature of an external cabinet while it is miniaturized and thinned.
SOLUTION: The projection type display device is constituted so that a sheet metal component 61 having high heat conductivity and a heat insulating sheet 62 having low heat conductivity may be arranged in space between a lamp 28 being a light source and the external cabinet. In such constitution, the temperature of the external cabinet is lowered by a thermal diffusion effect by the sheet metal component 61 having the high heat conductivity and a heat insulating effect by the heat insulating sheet 62 having the low heat conductivity while achieving the miniaturized and thinned structure where the space between the lamp 28 and the external cabinet is minimized.
COPYRIGHT: (C)2007,JPO&INPITAbstract translation: 要解决的问题：为了获得能够在小型化和薄化时实现外部柜的温度降低的投影型显示装置。 ＆lt; P＆gt;解决方案：投射型显示装置构成为具有导热性高的片状金属部件61和导热性低的绝热片62可以布置在作为光源的灯28和外部壳体 。 在这种结构中，通过具有导热性高的片状金属部件61和具有低导热性的绝热片62的绝热效果的热扩散效应，外部机壳的温度降低，同时实现小型化和变薄 灯28和外壳之间的空间最小化的结构。 版权所有（C）2007，JPO＆INPIT
-
-
-
-
-
-
-
Search Results
28
records
(took 0.036 seconds)
