Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical Phase Imaging Using Synthetic Aperture Illumination and Phase
  Retrieval   We perform quantitative phase imaging using phase retrieval to implement
synthetic aperture imaging. Compared to digital holography, the developed
technique is simpler, less expensive, and more stable.

10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess