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公开(公告)号：EP4231297A1
公开(公告)日：2023-08-23
申请号：EP21879942.7
申请日：2021-10-06
IPC分类号： G11B7/004 , G11B7/005 , G11B7/095 , G11B7/125 , G11B7/1275
摘要： An optical disc device (2) includes: an optical pickup (4) including a first laser light source (10) that emits laser light, an objective lens (24) that focuses the laser light emitted from the first laser light source (10) onto an optical disc (8), and a light receiving element (30) that receives reflected light from the optical disc (8), and performs photoelectric conversion on the reflected light received to output a received-light signal; an FS signal generator (54) that generates an FS signal indicating the light amount of the reflected light from the optical disc (8), based on the received-light signal from the light receiving element (30); and a dirt determiner (56) that determines that dirt is present in the optical pickup (4), when the peak level of the FS signal is less than a dirt determination threshold, and controls the light receiving element (30) to increase the peak level of the received-light signal from the light receiving element (30).
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公开(公告)号：EP3252773A1
公开(公告)日：2017-12-06
申请号：EP15879838.9
申请日：2015-12-21
CPC分类号： G11B7/127 , G02B6/2848 , G02B6/3526 , G11B7/082 , G11B7/1353 , G11B7/1367 , G11B7/1374 , G11B7/13922 , G11B2007/0006 , G11B2007/0009
摘要： An optical pickup device capable of improving playback performance in L2-layer at a time of playback of a triple-layer structure optical disc is provided. The optical pickup device includes a semiconductor laser that emits a laser beam, and an object lens that concentrates the laser beam emitted from the semiconductor laser on the optical disc. In this optical pickup device, an optical axis of the object lens is inclined with respect to an optical axis of the laser beam that is incident on the object lens so as to generate flares caused by coma aberration on an entrance side in a forward direction of pits of the optical disc.
摘要翻译： 提供了一种能够在重放三层结构光盘时改进L2层中的重放性能的光学拾取装置。 该光学拾取装置包括发射激光束的半导体激光器和将从半导体激光器发射的激光束集中在光盘上的物镜。 在该光学拾取装置中，物镜的光轴相对于入射到物镜上的激光束的光轴倾斜，以便在入射侧的前向产生由彗形像差引起的耀斑 光盘的坑。
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公开(公告)号：EP3588500A1
公开(公告)日：2020-01-01
申请号：EP18758430.5
申请日：2018-02-07
摘要： An optical disc drive device (20) includes a spindle motor (23) that rotates an optical disc (40), an OPU (21), a first controller (26) that causes the spindle motor (23) and the OPU (21) to read recorded data from the rotating optical disc (40), and an transmitter (27b) that transmits the read recorded data to a signal processing device (30) disposed external to the optical disc drive device (20). The recorded data transmitted by transmitter (27b) is stored in a buffer (33) provided in the signal processing device (30). The first controller (26) decreases the rotational speed of the optical disc (40) based on free space information indicating the free space of the buffer (33).
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公开(公告)号：EP4116972A3
公开(公告)日：2023-03-08
申请号：EP22180880.1
申请日：2018-02-07
摘要： An optical disc drive device (20) includes a spindle motor (23) that rotates an optical disc (40), an OPU (21), a first controller (26) that causes the spindle motor (23) and the OPU (21) to read recorded data from the rotating optical disc (40), and an transmitter (27b) that transmits the read recorded data to a signal processing device (30) disposed external to the optical disc drive device (20). The recorded data transmitted by transmitter (27b) is stored in a buffer (33) provided in the signal processing device (30). The first controller (26) decreases the rotational speed of the optical disc (40) based on free space information indicating the free space of the buffer (33).
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公开(公告)号：EP4116972A2
公开(公告)日：2023-01-11
申请号：EP22180880.1
申请日：2018-02-07
摘要： An optical disc drive device (20) includes a spindle motor (23) that rotates an optical disc (40), an OPU (21), a first controller (26) that causes the spindle motor (23) and the OPU (21) to read recorded data from the rotating optical disc (40), and an transmitter (27b) that transmits the read recorded data to a signal processing device (30) disposed external to the optical disc drive device (20). The recorded data transmitted by transmitter (27b) is stored in a buffer (33) provided in the signal processing device (30). The first controller (26) decreases the rotational speed of the optical disc (40) based on free space information indicating the free space of the buffer (33).
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公开(公告)号：EP3252773B1
公开(公告)日：2020-09-02
申请号：EP15879838.9
申请日：2015-12-21
IPC分类号： G11B7/1374 , G11B7/08 , G11B7/1353 , G11B7/1392
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