WAVELENGTH SELECTION DIFFRACTION ELEMENT AND OPTICAL HEAD DEVICE USING THE SAME

• Main Authors: TOUGE YUKIHIRO, ARISHIMA HIROYUKI, NAKAMURA KIYOHISA, NOMURA TAKUJI, HODAKA HIROKI
• Format: Patent
• Language: English
• Published: 21.02.2013
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

PROBLEM TO BE SOLVED: To provide a wavelength selection diffraction element having diffraction efficiency more excellent than the conventional one, and an optical head device using the same.SOLUTION: A wavelength selection diffraction element 10 includes a transparent substrate 11, a recessed and pr...