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Co-aperture broadband infrared optical system

  • US 9,651,763 B2
  • Filed: 02/10/2015
  • Issued: 05/16/2017
  • Est. Priority Date: 12/30/2014
  • Status: Active Grant
First Claim
Patent Images

1. A co-aperture broadband infrared optical system, comprising:

  • a Cassegrain lens;

    a first lens group;

    a spectroscope;

    a second lens group;

    an imaging interface;

    a third lens group;

    a reflector;

    a fourth lens group; and

    an optical fiber interface,wherein the first lens group is located at an exit optical path of the Cassegrain lens and arranged coaxially with the Cassegrain lens;

    a center of a mirror plane of the spectroscope coincides with a central axis, and the mirror plane of the spectroscope is arranged to form an angle of 45°

    with the central axis;

    the second lens group is located at a transmission optical path of the spectroscope;

    the imaging interface is located at a tail of the second lens group, and an exit pupil of the second lens group coincides with an interface surface of the imaging interface, for arranging an imaging component;

    the third lens group is located at a reflection optical path of the spectroscope;

    a center of the mirror plane of the reflector coincides with a central axis of the third lens group, and the mirror plane of the reflector is arranged to form an angle of 45°

    with the central axis, keeping parallel with the spectroscope;

    the fourth lens group is located at a reflection optical path of the reflector;

    the optical fiber interface is arranged at a rear of the fourth lens group, and an end surface of the optical fiber interface coincides with an exit pupil of the fourth lens group; and

    the Cassegrain lens comprises a primary mirror and a secondary mirror, an obscuration ratio of the primary mirror and the secondary mirror is not greater than 1;

    3.

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