Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase-shifting technique for improving the imaging capacity of
  sparse-aperture optical interferometers   In this paper, we describe the principle of a multi-aperture interferometer
that uses a phase-shifting technique and is suitable for quick, snapshot
imaging of astrophysical objects at extreme angular resolution through Fourier
inversion. A few advantages of the proposed design are highlighted, among which
are radiometric efficiency, Field of View equivalent to those of Fizeau
interferometers, and a preliminary calibration procedure allowing
characterization of instrumental errors. For large telescope numbers, the
proposed design also results in considerable simplification of the optical and
mechanical design. Numerical simulations suggest that it should be possible to
couple hundreds of telescopes on a single 4K x 4K detector array, using only
conventional optical components or emerging technologies.

9
The categories of this paper are: nlin
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ