This paper presents a new optical structure which achieves super-resolution by means of changing the
complex amplitude of light wave. It also establishes the numerical simulation of the structure. Placed
in front of the aperture of optical system, this new structure can modulate the light wave by changing
the amplitude transmittance, and also make the central maximum of the Airy Pattern narrower to
achieve super-resolution. We analyze modulation effects of many kinds of transmittance function. The
numerical simulated result shows that the central maximum of the Point Spread Function (PSF),
modulated by transmittance function whose edge value is greater than central value, becomes narrower
than that of the idea optical system. It is also concluded that this optical structure is insensitive to
different wavelength compared with the phase shifting apodizer, which brings about less chromatic
dispersion. This conclusion is extremely useful to realize the super-resolution.
One of the most crucial techniques of laser warning system is to acquire the direction information from the
laser threat. According to the low resolution of laser warning system with imaging mode, a new method for measuring
laser incident direction which possessed higher resolution was proposed. This novel method was based on cylindrical
lens group and linear IRFPA, and the laser incident direction was achieved by offset of line spot. It not only deduced the
direction formulas, but also analyzed the resolution of measuring laser incident direction in detail. The simulation result
shows that the FOV of this new kind of laser warning system could achieve ±16°; the azimuth resolution is up to 0.52°
and pitch resolution is up to 0.017°; the resolution increases with incident angle. In addition, an experiment with visible
light, single cylindrical lens, linear array CCD was done to verify this method and its advantage on resolution. The
analysis of laser incident orientation resolution is significant to select suitable parameter of detector and demonstrate
orientation resolution of system.
A method for capturing the solar shape and location on occurrence of solar occultation is presented. On occurrence of
occultation when the Sun is covered by atmosphere, the solar shape viewed by satellite-borne detector on certain orbit
through atmosphere at different heights varies greatly due to such factor as the in homogeneity of atmosphere and cloud
covering, etc. During the varying of heights of atmosphere, the gray image of Sun also changes, which even appears
several parts in different size due to the disturbance of cloud layer. Based on which, the Paper proposes a method for
capturing solar shape and intensity on occurrence of solar occultation. First, taking the solar grey image without
atmospheric refraction effects as a reference; then the refraction angle of Sun ray after being refracted by atmosphere can
be reversely calculated by using Abel integral function and the vertically distributed data of index of refraction; Last, the
solar shape after passing atmosphere can be obtained by calculating the refraction angle of the ray on solar limb. We
have obtained the image of solar shape and intensity at the occultation central point of contact from 5km to 60km when
the detector is located at the defined satellite orbit (600km) by simulation. This method is of great significance for
realizing the solar simulator which can reflect solar shape and intensity in a comparatively truly degree under the
circumstance of existing various affecting factors for application in the fields like measuring and calibration of posture
parts of satellite, remote sensing technology and material measure, etc.
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