Projecting optical unit and projecting type image display apparatus therewith

Projecting optical unit and projecting type image display apparatus therewith

  • CN 101,140,353 A
  • Filed: 12/07/2005
  • Published: 03/12/2008
  • Est. Priority Date: 04/08/2005
  • Status: Active Application
First Claim
Patent Images

1. projection type video display device, it is characterized in that:

  • it comprises;

    Image-displaying member;

    First optical system, have;

    comprise back group of at least 1 free-form surface lens that face that the axle of holding relatively the approximate centre by described image-displaying member becomes preceding group of centered optical system of face of symmetric shape and comprise one-sided or both sides forms the free form surface shape, comprise the image that will on described image-displaying member, show and amplify and project to projecting lens on the screen;

    WithSecond optical system comprises at least 1 free form surface mirror with free form surface shape, will be from the enlarged image of described projecting lens with respect to described screen inclination ground projection,Described image-displaying member, described projecting lens and described second optical system are separately fixed on the common optical system pedestal.

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