Patterned liquid-crystal optics for broadband coronagraphy and wavefront sensing

被引：23

作者：

Doelman, David S. ^{[1
]}

Snik, Frans ^{[1
]}

Warriner, Nathaniel Z. ^{[2
]}

Escuti, Michael J. ^{[2
]}

机构：

[1] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

[2] North Carolina State Univ, Dept Elect & Comp Engn, Raleigh, NC 27695 USA

来源：

TECHNIQUES AND INSTRUMENTATION FOR DETECTION OF EXOPLANETS VIII | 2017年 / 10400卷

基金：

欧洲研究理事会;

关键词：

High contrast imaging; Coronagraphy; Liquid-crystal; Polarization; ADAPTIVE OPTICS; PHASE-CONTRAST; PLANETS;

D O I：

10.1117/12.2273406

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The direct-write technology for liquid-crystal patterns allows for manufacturing of extreme geometric phase patterned coronagraphs that are inherently broadband, e.g. the vector Apodizing Phase Plate (vAPP). We present on-sky data of a double-grating vAPP operating from 2-5 mu m with a 360-degree dark hole and a decreased leakage term of similar to 10(-4). We report a new liquid-crystal design used in a grating-vAPP for SCExAO that operates from 1-2.5 mu m. Furthermore, we present wavelength-selective vAPPs that work at specific wavelength ranges and transmit light unapodized at other wavelengths. Lastly, we present geometric phase patterns for advanced implementations of WFS (e.g. Zernike-type) that are enabled only by this liquid-crystal technology.

引用

页数：12

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