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公开(公告)号：US4744070A
公开(公告)日：1988-05-10
申请号：US729933
申请日：1985-05-03
CPC分类号： G11B7/0903
摘要： An optical disk having V-shaped grooves with depths periodically varied at a frequency f for every two grooves, thus realizing a large recording area on each slant of the grooves. A tracking method for the optical disk in which two laser spots irradiate two adjoining slants of a V-shape groove, and pilot signals are made of components of the frequency f which are detected from the reflected beams of the respective two laser spots on the optical disk, and whereby the tracking is performed by controlling so as to make the magnitudes of the two pilot signals become equal to each other.
摘要翻译： 具有深度的V形槽的光盘以每两个槽的频率f周期性地变化，从而在槽的每个斜面上实现大的记录区域。 一种用于光盘的跟踪方法，其中两个激光点照射V形槽的两个相邻的斜面，并且导频信号由从光学上的相应两个激光点的反射光束检测的频率f的分量 并且由此通过控制来执行跟踪，以使得两个导频信号的幅度变得彼此相等。
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公开(公告)号：US4712204A
公开(公告)日：1987-12-08
申请号：US768843
申请日：1985-08-23
IPC分类号： G11B7/005 , G11B7/007 , G11B7/013 , G11B7/24 , G11B7/24076 , G11B7/24085 , G11B19/24 , G11B27/19 , G11B27/24 , G11B27/30 , G11B7/00 , G11B27/10
CPC分类号： G11B19/24 , G11B27/19 , G11B27/24 , G11B7/0053 , G11B7/00745 , G11B7/24 , G11B7/24076 , G11B7/24085 , G11B2220/20 , G11B27/3027
摘要： In an optical disk having grooves, pits representing reference signals in header regions of the grooves are disposed to be spaced apart from each other in a longitudinal direction of the groove to suppress undesirable interference or crosstalk of the reference signals in adjacent V-grooves. In the reproduction of such reference signals, two laser beam spots are respectively irradiated on the first and second oblique surface tracks in the V-groove. Two electric signals made by detecting the light reflected from the spots are examined to determine whether they are in coincidence. When coincidence is confirmed, the signals are used as valid reference signals.
摘要翻译： 在具有凹槽的光盘中，在凹槽的头部区域中表示参考信号的凹坑被布置成在凹槽的纵向方向上彼此间隔开，以抑制相邻V形槽中的参考信号的不期望的干扰或串扰。 在再现这样的参考信号时，两个激光束点分别照射在V槽中的第一和第二斜面轨道上。 检测通过检测从点反射的光产生的两个电信号，以确定它们是否重合。 当确认一致时，信号被用作有效的参考信号。
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53.发明授权Optical disk, high density optical disk system, and high density recording/reproducing method using the optical disk 失效光盘，高密度光盘系统和使用该光盘的高密度记录/再现方法
公开(公告)号：US4569038A
公开(公告)日：1986-02-04
申请号：US331840
申请日：1981-12-17
CPC分类号： G11B7/24 , G11B7/14 , G11B7/24076 , G11B7/24079
摘要： An optical disk recording and reproducing system which uses an optical disk at least one side of which is formed with a spiral groove which has a V-shaped or inverted-trapezoid-shaped cross sectional configuration. Both the radially inward and outward sloped faces of the groove are used as recording tracks which are tracked or scanned with the spot of a light beam in the case of recording or reproduction.
摘要翻译： 一种光盘记录和再现系统，其使用光盘，其至少一侧形成有具有V形或倒梯形截面形状的螺旋槽。 凹槽的径向向内和向外倾斜的表面都用作在记录或再现的情况下跟踪或扫描光束的记录轨道。
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公开(公告)号：US4420828A
公开(公告)日：1983-12-13
申请号：US216272
申请日：1980-12-15
IPC分类号： G11B7/00 , G11B7/004 , G11B7/005 , G11B7/007 , G11B7/09 , G11B7/12 , G11B17/34 , G11B27/10 , G11B27/30 , G11B21/02
CPC分类号： G11B17/34 , G11B27/105 , G11B27/3027 , G11B7/005 , G11B7/007 , G11B7/0901 , G11B7/12 , G11B2220/20
摘要： An optical reproducing device for reproducing still image signals recorded on circular tracks and moving image or audio signals recorded on spiral tracks on a disk. Concentric and spiral tracks may be intermingled on the same disk. The address signals for each concentric track or each coil of a spiral track are previously recorded. When the address signals are reproduced, they are processed so as to detect whether the readout address signals changes with time, thereby detecting whether the accessed track is concentric or spiral. An optical head drive system is controlled in a manner depending on whether the track is circular or spiral, so that an optical head can scan the desired concentric or spiral track.
摘要翻译： 一种用于再现记录在圆形轨道上的静止图像信号和记录在盘上的螺旋形轨道上的运动图像或音频信号的光学再现装置。 同心和螺旋轨道可能混在同一盘上。 预先记录螺旋轨迹的每个同心轨迹或每个线圈的地址信号。 当再现地址信号时，对它们进行处理，以检测读出的地址信号是否随时间变化，从而检测所访问的轨道是同心还是螺旋。 以取决于轨道是圆形还是螺旋形的方式控制光头驱动系统，使得光学头可以扫描所需的同心或螺旋形轨道。
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公开(公告)号：US4385303A
公开(公告)日：1983-05-24
申请号：US254276
申请日：1981-04-15
CPC分类号： G11B7/24 , G11B7/24079 , G11B7/26
摘要： An optical recording and reproducing disc for recording and/or reproducing information by the application of laser beams having a wavelength .lambda. in the range of 0.7 to 1.0 .mu.m, the disc being constituted by a disc-shaped base having at least one spiral guide track thereon with top surfaces parallel to the surface of the base at a height above the base different from the top surfaces of the portions of the base between the spires of the track, which height is in the range of .lambda./12 to .lambda./6, the guide track having a width approximately equal to the effective diameter of the laser beams; and a uniform thickness coating of a light recording material on the top surface of the guide track and the portions of the base between the spires of the guide track, the light recording material being a material the transmittance and/or the reflectance of which is varied by irradiation by the laser beams.
摘要翻译： 一种用于通过应用波长λ在0.7至1.0μm范围内的激光束来记录和/或再现信息的光学记录和再现盘，该盘由具有至少一个螺旋导轨的盘形基座 其上表面平行于基座的表面，高于基座上方的高度不同于轨道尖端之间的基部部分的顶表面的高度，该高度在λ/ 12至λ/ 6的范围内， 所述导轨具有大致等于所述激光束的有效直径的宽度; 以及在导轨的顶表面上的光记录材料的均匀厚度涂层以及在导轨的尖端之间的基部的部分，光记录材料是透射率和/或其反射率变化的材料 通过激光束照射。
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