×

Optical system that widens an image capture view angle

  • US 10,281,272 B2
  • Filed: 10/27/2015
  • Issued: 05/07/2019
  • Est. Priority Date: 10/29/2014
  • Status: Active Grant
First Claim
Patent Images

1. An optical system for imaging an object, the optical system comprising:

  • two or more imaging lenses having an anspherical convex surface and a spherical concave surface on which light emitted from the object is incident,a plurality of pairs of cemented lenses that receive light from the two or more imaging lenses;

    a spherical lens that receives light from the plurality of cemented lenses, anda polarizer that receives light from the spherical lens to form an image,wherein;

    θ

    is a half view angle of the optical system,D is a distance from the object to the optical system,y(θ

    ) is an image height of the image,D(θ

    )=1/(dy(θ

    )/dθ

    is a rate a rate of change of the view angle per image height,dy/dθ

    is a rate of change of the image height per view angle,Θ

    s is a switching view angle of the rate of change of the view angle per image height,dy/dθ

    , is greater than 0 at a maximum view angle θ

    max of the optical system,D(θ

    )=1/(dy(θ

    )/dθ

    ), satisfies D(θ

    p)>

    {(D(θ

    max)−

    D(0))/θ

    maxθ



    p+D(0), with θ

    p which lies in a range of 0<

    θ

    <

    θ

    max, andY(θ

    ) satisfies 1.5<

    (y(θ

    s)/θ

    s)/{(y(θ

    max)−

    y(θ

    s))/(θ

    max−

    θ

    s)}<

    3.0.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×