Semiconductor laser apparatus, optical pick-up and optical information apparatus

• Main Authors: WADA HIDENORI, SHIROIWA HIROSHI, MIZUNO SADAO, KOMMA YOSHIAKI, SHIONO TERUHIRO, NISHINO SEIJI
• Format: Patent
• Language: English
• Published: 22.03.2007
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

A transmission diffraction grating body including a base material being substantially transparent with respect to wavelength lambda 1 and having a refractive index n 0 ; another base material being substantially transparent with respect to wavelength lambda 1 and having a refractive index n 1 , whic...