Title:
COVER GLASS
Document Type and Number:
Japanese Patent JP2016166965
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a cover glass that protects a display arranged on the outer periphery of a lens barrel and enlarges and displays the details of display.SOLUTION: There is provided a lens comprising a display that displays lens information provided at a lens barrel part of the lens, and a cover glass that is arranged at a position separated from a display surface to protect the display, where the cover glass is an optical system that can enlarge and display the details of display, and when the radius of curvature of the surface of the cover glass close to the display is R1, and the radius of curvature of the surface distant from the display is R2, the following conditional expression is satisfied. (1) -3.0<(R2+R1)/(R2-R1)<0.SELECTED DRAWING: Figure 1
Inventors:
ITO REI
Application Number:
JP2015046552A
Publication Date:
September 15, 2016
Filing Date:
March 10, 2015
Export Citation:
Assignee:
CANON KK
International Classes:
G02B25/00; G02B7/02
Attorney, Agent or Firm:
Yukio Takanashi
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