Ring-field TMA for PRISMA: theory, optical design, and performance measurements

Luciano Calamai; Stefano Barsotti; Enrico Fossati; Roberto Formaro; Kevin P. Thompson

doi:10.1117/12.2191286

23 September 2015 Ring-field TMA for PRISMA: theory, optical design, and performance measurements

Luciano Calamai, Stefano Barsotti, Enrico Fossati, Roberto Formaro, Kevin P. Thompson

Proceedings Volume 9626, Optical Systems Design 2015: Optical Design and Engineering VI; 96261Z (2015) https://doi.org/10.1117/12.2191286
Event: SPIE Optical Systems Design, 2015, Jena, Germany

Abstract

PRISMA (PRecursore IperSpettrale della Missione Applicativa) Hyperspectral Payload is an Electro-Optical instrument developed in Selex ES for the dedicated ASI (Italian Space Agency) mission for Earth observation. The performance requirements for this mission are stringent and have led to an instrument design that is based on a Ring-Field Three Mirror Anastigmat (Ring-Field TMA), a two channel prism dispersion based spectrometer (VNIR and SWIR), and a Panchromatic Camera. The Ring-Field TMA contains three mirrors (two conics and one conic with some higher order correction). Exceptional performance has been achieved by not only introducing 3rd order astigmatism to balance the 5th astigmatism at the ring field zone as is traditional in an Offner-type design but, additionally, 3rd order coma has been controlled to align the balance of the linear and field cubic coma terms at the same ring field zone. The predicted wavefront performance of the design over the field of view will be highlighted. An assembly and alignment procedure for the Ring-Field TMA has been developed from the results of the sensitivity and tolerances analysis. The tilt and decenter sensitivity of the design form is nearly exclusively determined by 3rd order binodal astigmatism. The nodal position is linear with perturbation, which greatly simplifies the decisions on alignment compensators. The manufactured mirrors of the Ring-Field TMA have been aligned at Selex ES and as will be reported the preliminary results in terms of optical quality are in good agreement with the predicted as-built performance, both on-axis and in the field.

Citation Download Citation

Luciano Calamai, Stefano Barsotti, Enrico Fossati, Roberto Formaro, and Kevin P. Thompson "Ring-field TMA for PRISMA: theory, optical design, and performance measurements", Proc. SPIE 9626, Optical Systems Design 2015: Optical Design and Engineering VI, 96261Z (23 September 2015); https://doi.org/10.1117/12.2191286

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
18 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Monochromatic aberrations

Mirrors

Spectroscopy

Telescopes

Space telescopes

Tolerancing

Modulation transfer functions

Show All Keywords

Keywords/Phrases

Search In:

Publication Years