NGST OTA Optical Metrology Instrumentation and Conceptual Approaches

摘要

An Integrated Product Team (IPT) was formed to develop a detailed concept for optical test methodology for testing of the NGST individual primary, secondary and tertiary mirrors and the full telescope system ont he ground. The large, lightweight, deployable primary mirror, and the cryogenic operating environment make optical testing of NGST OTA (Optical Telescope Assembly) extremely challenging. A telescope of the complexity of NGST has never been built and tested ont he ground in 1-g environment. A brief summary of the preliminary metrology test plan at the mirror component and tesescope system level is presented.