Title:
三個のレンズを有する対物レンズ系
Document Type and Number:
Japanese Patent JP2007510955
Kind Code:
A
Abstract:
An optical system is provided. In order from an object side to an image side, the optical system includes a first lens element having a positive power, a meniscus shape, and an object side surface. The object side surface of the first lens element is convex toward the object side. A second lens element has a negative power, a meniscus shape, and an object side surface. The object side surface of the second lens element is concave toward the object side. A third lens element has a positive power. An aperture stop is positioned on or in front of an object side of the first lens element.
Inventors:
Cahor, scott, christian
Ray Digg, Curl, Frederick
Ray Digg, Curl, Frederick
Application Number:
JP2006538502A
Publication Date:
April 26, 2007
Filing Date:
November 03, 2004
Export Citation:
Assignee:
Eastman Kodak Company
International Classes:
G02B9/16; G02B7/02; G02B9/14; G02B13/00; G02B13/16; G02B13/18
Domestic Patent References:
| JPH01162314U | 1989-11-13 | |||
| JPS6340116A | 1988-02-20 | |||
| JPS6275609A | 1987-04-07 | |||
| JPH04263211A | 1992-09-18 | |||
| JPH03127009A | 1991-05-30 | |||
| JPH1123959A | 1999-01-29 |
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito