Optical system for projection displays

Optical system for projection displays

  • CN 1,322,370 C
  • Filed: 03/20/2000
  • Issued: 06/20/2007
  • Est. Priority Date: 06/29/1999
  • Status: Active Grant
First Claim
Patent Images

1. image projection system, it comprises:

  • (a) light source (33), it provides illumination light (31);

    (b) a plurality of optionally scalable reflecting elements (35), they are configured in the publicly-owned plane, and described element (35) can regulated between the primary importance and the second place at least;

    (c) lens (39), it has the principal plane that is parallel to described publicly-owned plane;

    With(d) prism (13), it is positioned between described lens (39) and the described a plurality of reflecting element (35);

    It is characterized in that;

    (A) lens (39) have acceptance angle;

    (B) prism (13) comprises first (19) and second (21) release surface, and these two surfaces make with respect to light source (33), a plurality of reflecting element (35) and lens (39) orientation;

    (i) light (31) that sends of light source (33) passes first (19) and second (21) release surface, arrive a plurality of reflecting elements (35) and(ii) the light (37) of primary importance place reflecting element (35) reflection (a) passes the first reflected light transmissive side (27) of prism (13), (b) locate along the reflection of the direction in lens (39) acceptance angle at second release surface (21), (c) pass the second reflected light transmissive side (29) of prism (13);

    (C) this system has optical axis, this optical axis;

    (i) perpendicular to publicly-owned plane;

    And(ii) locate at second release surface (21), experience changes on a direction;

    (D) when along the optical axis translation and from second release surface (21) reflex time, principal plane be parallel to publicly-owned plane and(E) first (27) of prism (13) and second (29) the reflected light transmissive side has an intersection interior angle.

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