The Infrared Imaging Spectrograph (IRIS) for TMT: Prototyping of cryogenic compatible stage for the Imager

The IRIS Imager requires opt-mechanical stages which are operable under vacuum and cryogenic environment. Also the stage for the IRIS Imager is required to survive for 10 years without maintenance. To achieve these requirements, we decided prototyping of a two axis stage with 80 mm clear aperture. T...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2016-08
Main Authors: Uraguchi, Fumihiro, Obuchi, Yoshiyuki, Bungo Ikenoue, Saito, Sakae, Suzuki, Ryuji, Hayano, Yutaka
Format: Article
Language:English
Subjects:
Apertures
Astronomical instruments
Ball screws
Durability
Errors
Infrared imaging
Lubricants
Mechanical components
Prototyping
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The IRIS Imager requires opt-mechanical stages which are operable under vacuum and cryogenic environment. Also the stage for the IRIS Imager is required to survive for 10 years without maintenance. To achieve these requirements, we decided prototyping of a two axis stage with 80 mm clear aperture. The prototype was designed as a double-deck stage, upper rotary stage and lower linear stage. Most of components are selected to take advantage of heritage from existing astronomical instruments. In contrast, mechanical components with lubricants such as bearings, linear motion guides and ball screws were modified to survive cryogenic environment. The performance proving test was carried out to evaluate errors such as wobbling, rotary and linear positioning error. We achieved 0.002 \(\rm deg_{rms}\) wobbling, 0.08 \(\rm deg_{0-p}\) rotational positioning error and 0.07 \(\rm mm_{0-p}\) translational positioning error. Also durability test under anticipated load condition has been conducted. In this article, we report the detail of mechanical design, fabrication, performance and durability of the prototype.
ISSN:2331-8422
DOI:10.48550/arxiv.1608.02436