Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A high-contrast coronagraph for earth-like exoplanet direct imaging:
  design and test   The high-contrast coronagraph for direct imaging earth-like exoplanet at the
visible needs a contrast of 10^(-10) at a small angular separation of 4
lambda/D or less. Here we report our recent laboratory experiment that is close
to the limits. The test of the high-contrast imaging coronagraph is based on
our step-transmission apodized filter. To achieve the goal, we use a liquid
crystal array (LCA) as a phase corrector to create a dark hole based on our
dedicated focal dark algorithm. We have suppressed the diffracted and speckle
noise near the star point image to a level of 1.68 x 10^(-9) at 4 lambda/D,
which can be immediately used for the direct imaging of Jupiter like
exoplanets. This demonstrates that high-contrast coronagraph telescope in space
has the potentiality to detect and characterize earth-like planets.

25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom