×

Endoscope objective lens and endoscope

  • US 7,907,352 B2
  • Filed: 04/08/2008
  • Issued: 03/15/2011
  • Est. Priority Date: 04/09/2007
  • Status: Expired due to Fees
First Claim
Patent Images

1. An endoscope objective lens comprising, in order from an object side:

  • a negative first lens having a concave surface directed to an image side;

    a first cemented lens formed by cementing a second lens and a third lens, one of the second and third lenses being positive and, the other being negative;

    a stop;

    a positive fourth lens including a flat surface or a surface having a larger absolute value in radius of curvature, directed to the object side; and

    a second cemented lens formed by cementing a positive fifth lens and a negative sixth lens in order from the object side, the second cemented lens having a positive refractive power as a whole, whereinthe endoscope objective lens satisfies the following conditional expressions (1) and (2)

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×