Alignment performance comparison between MFR and MDCO for a TMA optical system

Hyukmo Kang; Eunsong Oh; Sug-Whan Kim

doi:10.1117/12.2188244

3 September 2015 Alignment performance comparison between MFR and MDCO for a TMA optical system

Hyukmo Kang, Eunsong Oh, Sug-Whan Kim

Proceedings Volume 9582, Optical System Alignment, Tolerancing, and Verification IX; 95820G (2015) https://doi.org/10.1117/12.2188244
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

In this study, we performed alignment state estimation simulations and compared the performance of two Computer Aided Alignment (hereafter CAA) algorithms i.e. ‘Merit Function Regression (MFR)’ and ‘Multiple Design Configuration Optimization (MDCO)’ for a TMA optical system. The former minimizes the merit function using multi-field wavefront error measurements from single configuration, while the latter minimizes the merit function using single-field measured wavefront error from multiple configurations. The optical system used is an unobscured three-mirror anastigmat (TMA) optical system of 70mm in diameter, and F/5.0. It is designed for an unmanned aerial vehicle for coastal water remote sensing. The TMA consists of two aspherical mirrors, a spherical mirror and a flat folding mirror. Based on the sensitivity analysis, we set the tilt x, y of tertiary mirror as a compensator, and not considered decenter of tertiary mirror because of its spherical characteristic. For the simulation, we introduced Gaussian distribution of initial misalignment to M3. It has the mean value of zero and standard deviation of 0.5 mrad. The initial simulation result of alignment state estimation shows that both algorithms can meet the alignment requirement, λ/10 RMS WFE at 633nm. However, when we includes measurement noise, the simulation result of MFR shows greater standard deviation in RMS WFE than that of MDCO. As for the measurement, the MDCO requires single on-axis field while the MFR requires multiple fields, we concluded that the MDCO is more practical method to align the off-axis TMA optics than MFR.

Citation Download Citation

Hyukmo Kang, Eunsong Oh, and Sug-Whan Kim "Alignment performance comparison between MFR and MDCO for a TMA optical system", Proc. SPIE 9582, Optical System Alignment, Tolerancing, and Verification IX, 95820G (3 September 2015); https://doi.org/10.1117/12.2188244

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
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Mirrors

Optical alignment

Monte Carlo methods

Wavefronts

Computer simulations

Detection and tracking algorithms

Remote sensing

Show All Keywords

Keywords/Phrases

Search In:

Publication Years