Object lens for optical pick-up and optical pick-up device

Application Number: 00126445
Application Date: 2000.09.01
Publication Number: 1286407
Publication Date: 2001.03.07
Priority Information: 2000/3/6 JP 060843/2000; 1999/9/1 JP 247294/1999
International: G02B3/02;G11B7/12
Applicant(s) Name: Konica Corp.
Inventor(s) Name: Ota Kohei;Kimura Akira
Patent Agency Code: 11038
Patent Agent: feng pu
Abstract An objective lens for use in an optical pickup apparatus to record or reproduce information in an optical information recording medium, comprises an aspheric surface, wherein the following conditional formula is satisfied: 1.1 <= d1/f <= 3 where d1 represents axial lens thickness and f represents a focal length.