Aspheric lens and optical pickup including the same

An aspheric lens includes at least one aspheric lens surface, and an angle of inclination on the aspheric lens surface is smaller than or equal to 65°. The aspheric lens surface is preferably given by the equation Z r = c ¢ r 2 1 + 1 - 1 + K ¢ c 2 ¢ r 2 + L ¢ r 2 + A ¢ r 4 + B ¢ r 6 + C ¢ r 8...

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Bibliographische Detailangaben
Hauptverfasser:	PARK, SOO-HAN, MORISHITA, ICHIRO, SEO, JOONG-EON, KIM, BONG-GI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	An aspheric lens includes at least one aspheric lens surface, and an angle of inclination on the aspheric lens surface is smaller than or equal to 65°. The aspheric lens surface is preferably given by the equation Z r = c ¢ r 2 1 + 1 - 1 + K ¢ c 2 ¢ r 2 + L ¢ r 2 + A ¢ r 4 + B ¢ r 6 + C ¢ r 8 + D ¢ r 10 + E ¢ r 12 + F ¢ r 14 + G ¢ r 16 + H ¢ r 18 + J ¢ r 20 where L 0, c is a curvature, r 2 = x 2 + y 2 , K is a conic integer, and L and A through J are aspheric coefficients.