Optical system and imaging system incorporating it
AssigneeOlympus Imaging Corp. and Olympus Corporation
InventorsMasahito Watanabe, Kazuteru Kawamura
Life of this patent
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Abstract
The invention relates to an optical system that is capable of providing a zoom lens having improved image-formation capability with a reduced number of lenses, and fabricating a slim yet high-performance digital or video camera. The optical system comprises a cemented lens having a cementing surface on its optical axis. Air contact surfaces on the light ray entrance and exit sides of the cemented lens G2 are aspheric, and at least one cementing surface in the cemented lens G2 satisfies condition (1). 6.4<|(r/R)| (1) Here r is the axial radius of curvature of the cementing surface, and R is the maximum diameter of the cementing surface.
Claims4
An optical system comprising a cemented lens having a cementing surface on an optical axis of the optical system, wherein air contact surfaces that are on a light ray entrance side and a light ray exit side of said cemented lens are aspheric and at least one cementing surface in said cemented lens satisfies condition (1):
- 6.4<|(r/R)| (1)
- where r is a radius of curvature of the cementing surface on the optical axis and R is a maximum diameter of the cementing surface.
Dependencies are inferred from the claim text.