Disclosed is a negative compensation type large-target-surface medium-wave
refrigeration infrared continuous zooming optical
system. The optical
system adopts secondary imaging and continuous zoomingdesign, and optical and lens design to obtain a combination of only 10 lenses, has relatively
high transmittance, improves
system sensitivity, and effectively controls the total length of the opticalsystem; by adopting a cylindrical
cam to control motion of a
zoom group and a compensation group, the
advantage of a simple compensation structure is achieved; a field
diaphragm structure is added, sothat influence of
stray light on the imaging of the system is reduced, and the
signal-to-
noise ratio of the system is improved; cold diaphragm is adopted, and the realization efficiency is 100%, so that the
light beam energy loss is reduced, and the system sensitivity is improved; the
optical axis direction of the system is changed through two plane reflecting mirrors, so that the total length ofthe optical system is shortened effectively; and the continuous zooming optical system has the advantages of high
imaging quality, short optical total length, simple
zoom and compensation structure,high
signal-to-
noise ratio and high sensitivity, and fills up the blank of a continuous
zoom optical system applicable to a 1280*1024
large target surface and medium-wave
refrigeration type
detector in China.