IMAKA: imaging from MAuna KeA optical design

Clinton Evans; Hua Lin; Ashley McColgan; Neil Rowlands; Derrick Salmon

doi:10.1117/12.857285

19 July 2010 IMAKA: imaging from MAuna KeA optical design

Clinton Evans, Hua Lin, Ashley McColgan, Neil Rowlands, Derrick Salmon

Proceedings Volume 7735, Ground-based and Airborne Instrumentation for Astronomy III; 773537 (2010) https://doi.org/10.1117/12.857285
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

The 'IMAKA (Imaging from MAuna KeA) instrument is a wide field visible light imager incorporating Ground Layer Adaptive Optics (GLAO) to take maximum advantage of the excellent seeing available at the Canada-France-Hawaii Telescope (CFHT). It requires better than 0.3" image quality simultaneously over a total field of view of approximately one square degree (~3 x 10^-4 sr). This requirement along with other criterions and constraints raises a challenge for optical design. The advent of orthogonal transfer (OT) CCDs allows the tip-tilt portion of the atmospheric correction to be performed at the science detector itself. 'IMAKA will take full advantage of the large array mosaics of OTCCDs. Since the size of the adaptive mirror would drive the cost and hence implementation of the overall 'IMAKA instrument, a review of possible optical design configurations which minimize the size (diameter) of the deformable mirror is undertaken. A promising design was obtained and developed in more detail. This all reflective system is described along with its predicted optical performance. An opto-mechanical design concept was developed around this nominal optical design which takes into account various constraints due to its required location on the top end of the Canada France Hawaii Telescope. The design concept is feasible and meets the optical performance requirements.

Citation Download Citation

Clinton Evans, Hua Lin, Ashley McColgan, Neil Rowlands, and Derrick Salmon "IMAKA: imaging from MAuna KeA optical design", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 773537 (19 July 2010); https://doi.org/10.1117/12.857285

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available