Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A metrological characterization of the SPEED test-bed PIAACMC components   The segmented pupil experiment for exoplanet detection (SPEED) facility aims
to improve knowledge and insight into various areas required for gearing up
high-contrast imaging instruments adapted to the unprecedented high angular
resolution and complexity of the forthcoming extremely large telescopes (ELTs).
SPEED combines an ELT simulator, cophasing optics, wavefront control and
shaping with a multi-deformable mirror (DM) system, and optimized small
inner-working angle (IWA) coronagraphy. The fundamental objective of the SPEED
setup is to demonstrate deep contrast into a dark hole optimized for small
field of view and very small IWA, adapted to the hunt of exoplanets in the
habitable zone around late-type stars. SPEED is designed to implement an
optimized small IWA coronagraph: the phase-induced amplitude apodization
complex mask coronagraph (PIAACMC). The PIAACMC consists in a multi-zone
phase-shifting focal plane mask (FPM) and two apodization mirrors (PIAA-M1 and
PIAA-M2), with strong manufacturing specifications. Recently, a
first-generation prototype of a PIAACMC optimized for the SPEED facility has
been designed and manufactured. The manufacturing components exhibit high
optical quality that meets specifications. In this paper, we present how these
components have been characterized by a metrological instrument, an
interferential microscope, and then we show what is yielded from this
characterization for the FPM and the mirrors. Eventually, we discuss the
results and the perspectives of the implementation of the PIAACMC components on
the SPEED setup.

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The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: eess