AN ASYMMETRIC WIDE ANGLE INFRARED OPTICAL SYSTEM IN WHICH ANAMORPHIC LENSES ARE APPLIED AND A THERMAL OBSERVATION DEVICE HAVING THE OPTICAL SYSTEM

摘要

PURPOSE: An anamorphic lens applied asymmetric wide angle infrared optical system and a thermal observation device with the same are provided to increase the resolution by horizontally offering a wide field of view and vertically applying high magnification. CONSTITUTION: The first lens group(A) comprises a spherical lens of a fisheye shape. The second lens group(B) comprises an anamorphic lens, a spherical lens, and two aspheric lenses. The third lens group(3) an anamorphic lens, a spherical lens, and two aspheric lenses. An aperture stop(10) is arranged in front of the image surface at the far end of an optical system to control incident light intensity of the optical system.