Affiliation:
1. Chinese Academy of Sciences
2. University of Chinese Academy of Sciences
3. China Academy of Aerospace Science and Innovation
Abstract
Aiming at the wide-spectrum chromatic aberration problem of membrane diffractive
lenses, the concept of the digital chromatic aberration correction
infrared imaging system was proposed. The principle of digital
chromatic aberration correction was given, and the chromatic
aberration correction of this system was completed on a computer,
which is based on a wavelength-tunable laser local oscillator coherent
detection detector. Compared with the chromatic aberration correction
method for traditional lenses, this membrane diffractive optical
system exhibited characteristics of small size, low weight, and low
complexity. The digital chromatic aberration correction application
conditions of this membrane diffractive optical system were analyzed.
In addition, the main parameters and imaging simulation results were
given. The center wavelength of this membrane diffractive optical
system is 1.55 µm, and its spectral range is
1.50–1.60 µm. The application of autocorrelation processing to
infrared complex images after digital chromatic aberration correction
followed by incoherent accumulation of the received corrected complex
images based on multiple stepping wavelengths could significantly
improve the imaging signal-to-noise ratio.
Funder
Key Deployment Projects of the Chinese Academy of Sciences
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering