Patent ID: 6052233
Filing Date: 2000-04-18
Classification: G02B,G03B

Abstract:
A taking lens consisting of a positive power single lens element positioned behind an aperture stop of a photographic camera for use with a film having an image format of 16.7.times.30.2 mm, said single lens element having an object side surface, said object side surface having a core section, said core section being a full converging portion of the object side surface, an annular marginal section being a portion of the core section which lies outside an effective aperture of the single lens element, said taking lens satisfying the following conditions:Dr<1.0Dc<0.75Ds<3.0Where Dr is the radial width of the annular marginal section;Dc is the thickness of the core section in an extension of a straight line connecting the outer periphery of the core section and the center of curvature of an image side surface of the single lens element; andDs is the air space between the image side surface and the aperture stop.