In this paper we investigate coded apertures as a function of mask damage, cross talk (on the focal plane arrays), and combinations of the two. We apply a Monte Carlo simulation to extract the probability of the scene reconstruction vs SNR as a performance metric. In addition we calculate the mean time between failures of the system as function damage to the mask.
Coded aperture imaging technology have been utilized [1] for imaging in various space missions primary associated
with X-Ray and Gamma ray sources. The need to extend the coded aperture technique into Visible/IR is pushing the
technology and so geometrical features become smaller [2,3]. As the geometrical feature become smaller, second
order effect such as diffraction become noticeable. The effects are typically isolated in order to improve Signal-to-
Noise Ratio (SNR). In this paper we are exploiting diffraction and interference to use as a coding approach. We
propose a coded aperture transmitter/receiver system capable of hiding information (bits) inside the diffraction nulls.
In designing optical systems in the EO/IR wavelength region for conventional lens are most common and
efficient when low F# and large field of view is desired. Conventional lenses are efficient in meeting
optical response but come at a cost in size and weight and often are complex in nature (aberrations). In
this paper we discuss alternatives to conventional lenses. We examine diffractive optics (DO), and
explore resonating and diffractive periodic metalo-dielectric structures as an alternative lensing. An
oscillator model is employed to interpret these structures, wavefront bending and a design approach is
provided.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.