Breakthroughs in Picometer Ultra-Stable Spatial Metrology Systems for Next Generation Telescopes

Feinberg, Lee ; Saif, Babak

关键词: HABEX;    CORONAGRAPHS;    PLANET DETECTION;    TELESCOPES;    METROLOGY;    MEASURING INSTRUMENTS;    MIRRORS;    IMAGE CONTRAST;    JAMES WEBB SPACE TELESCOPE;   

RP-ID  :  GSFC-E-DAA-TN70028

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Goal is to discover and characterize habitable planet candidates around Sun-like stars. Need 10(exp -10) contrast between reflected earth like planet and sun like stars. Options are internal Coronagraphs (LUVOIR and Habex) and large starshades (Habex) which each have pros and cons. Coronagraphs require 10(exp -10)contrast stability which means the primary mirror must be stable to roughly 10 picometers RMS wavefront over an exposure(minutes). Simplistically: Primary mirror instabilities of 10 picometers in certain spatial frequencies look like planets!