Patent ID: 6392820
Filing Date: 2002-05-21
Classification: G02B,G03B

Abstract:
An optical system of a composite camera comprising a first image-forming optical system, and a second image-forming optical system for re-imaging an image, formed on an image plane equivalent to an image plane of said first image-forming optical system, onto a predetermined position;wherein a condenser lens group, comprising one of at least two lens elements and a single lens element on which at least one aspherical surface is formed, is provided between said equivalent image plane and said second image-forming optical system; and wherein said optical system of said composite camera satisfies the following condition at any image height on said equivalent image plane: &Dgr;&thgr;Pmaxâˆ’&Dgr;&thgr;Pmin<2Â°â€ƒwherein &Dgr;&thgr;Pmax designates the maximum value of &Dgr;&thgr;P(y)=&thgr;BP(y)âˆ’&thgr;AP(y); &Dgr;&thgr;Pmin designates the minimum value of &Dgr;&thgr;P(y)=&thgr;BP(y)âˆ’&thgr;AP(y); &Dgr;&thgr;AP(y) designates an angle of incidence, at an image height y, of a principal ray which is transmitted through said first image-forming optical system, and is incident on said equivalent image plane; and &Dgr;&thgr;BP(y) designates an angle of incidence, at said image height y on said equivalent image plane, of a principal ray to be incident on said predetermined position, through said first image-forming optical system, said condenser lens group and said second image-forming optical system.