Patent ID: 6476983
Filing Date: 2002-11-05
Classification: G02B

Abstract:
An objective lens comprising, in order from an object side to an image side:a first lens unit of positive refractive power, said first lens unit consisting of one positive lens; and a second lens unit of negative refractive power, said second lens unit consisting of one positive lens and one negative lens, wherein said objective lens satisfies the following conditions: 0.5&lE;f1o/fo&lE;0.9 1.1&lE;âˆ’f2o/fo&lE;2.5 0.1&lE;D12o/fo&lE;0.2 where fo is the focal length of the entirety of said objective lens, f1o is the focal length of said first lens unit, f2o is the focal length of said second lens unit, and D12o is an interval between said first lens unit and said second lens unit.