Patent ID: 6064530
Filing Date: 2000-05-16
Classification: G02B

Abstract:
An eyepiece system including a first, a second and a third lens element arranged in this order from the object side, said first lens element being made of a meniscus lens of positive power having a convex surface located on the object side, said second and third lens elements are cemented to form a cemented lens group of positive power, wherein said eyepiece system satisfies the following conditions (1) and (2):0.2<f.sub.e /f.sub.1 <0.65 (1)and0.6<f.sub.e /f.sub.23 <1.0, (2)whereinf.sub.1 is the focal length of said first lens element,f.sub.e is the focal length of the entire said eyepiece system,f.sub.23 is the resultant focal length of said second and third lens elements.