Please download the dossier by clicking on the dossier button x
×

De-centered optical system and optical apparatus equipped therewith

  • US 6,646,812 B2
  • Filed: 01/25/2002
  • Issued: 11/11/2003
  • Est. Priority Date: 01/29/2001
  • Status: Expired due to Term
First Claim
Patent Images

1. A de-centered optical system comprising:

  • a first optical element and a second optical element each of which is disposed between a pupil and an image;

    the first optical element being a prism having at least three optical surfaces including first, second and third optical surfaces, and a portion surrounded by these three surfaces being made of a medium having a refractive index of more than 1;

    the first optical surface being positioned closest to the pupil among these three surfaces and having a function of refracting light and a function of reflecting light inside the optical element;

    the third optical surface being positioned closest to the image surface among these three surfaces and having a function of refracting light;

    the second optical surface being disposed on a de-centered position from an optical axis which is a center line of a light bundle, and shaped as a curved surface having a positive optical power when reflecting light inside the optical element;

    the second optical element being disposed on the pupil side of the first optical element, having a positive optical power, and at least a surface on the pupil side thereof being a convex surface;

    the second optical element producing a chromatic aberration of magnification;

    wherein the de-centered optical system is so configured that when light goes through the de-centered optical system from the second optical element side to the first optical element, it forms a larger image at a light wavelength region of red than that of green, and at a light wavelength region of green than that of blue; and

    the first optical element and the second optical element satisfy at least one of the following conditions (1) and (2);

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