Matches 1 - 2 out of 2
Match Document Document Title
7414951 Optical head device and optical recording and reproducing apparatus  
An optical head device and an optical recording and reproducing apparatus using this optical head device, which can record information and reproduce the recorded information at any of optical...
7072114 Optical pickup using an optical phase plate and which is compatible with optical recording media of different types  
An optical pickup apparatus having laser light sources emit a first light beam having a relatively shorter wavelength for a DVD and a second light beam having a longer wavelength for a CD-R, an...
Matches 1 - 2 out of 2