Invention Grant
US08520488B2 Optical pickup device that forms an oval spot on a disc having a small angle with respect to a radial axis 失效
在相对于径向轴线具有小角度的盘上形成椭圆形点的光学拾取装置

Optical pickup device that forms an oval spot on a disc having a small angle with respect to a radial axis
Abstract:
An optical pickup device, an optical drive using the same, and a method of forming a beam spot are provided. The optical pickup includes a light source system that includes a light source corresponding to at least one of a digital versatile disc (DVD) and a Blu-ray disc (BD). The light source forms a beam spot having an oval shape with a long axis and a short axis on an information recording track of the disc, and the light source is disposed such that the long axis is maintained at an angle ranging from 0° to 30° with respect to a radial direction passing through a rotation center of the disc.
Public/Granted literature
Information query
Patent Agency Ranking
0/0