Hybrid digital-optical imaging design for reducing surface asphericity cost while keeping high performance

Javier Portilla; Sergio Barbero

doi:10.1117/12.2312660

28 May 2018 Hybrid digital-optical imaging design for reducing surface asphericity cost while keeping high performance

Javier Portilla, Sergio Barbero

Proceedings Volume 10694, Computational Optics II; 1069406 (2018) https://doi.org/10.1117/12.2312660
Event: SPIE Optical Systems Design, 2018, Frankfurt, Germany

Abstract

Aspheres in optical design are frequently used to achieve high optical performance in imaging applications. However, manufacturing aspheres involves serious precision and cost issues that must be considered. We show that, by applying a hybrid digital-optical design approach, the amount of the asphericity cost in a single surface may be significantly alleviated without compromising the performance. First, we compute the amount of spherical aberration depending on the optical parameters (conic constant and shape factor), and compute its corresponding point spread function (PSF). From the PSF and the spectral distribution of clean images and noise, we set a statistical observation model for estimating the expected image quality (in mean square error terms) in the image sensor and also in the digitally restored image. In addition, we use a previously proposed metric for quantifying the asphere fabrication cost, to set different cost scenarios. For each of these scenarios, we study how image quality is optimized, before and after digital restoration. Reversely, we find the optical configurations of minimal asphericity cost amongst those providing a very low aberration level. Although here we have limited our study to just on-axis, monochromatic imaging, we show in simulations how our digital-optical combined approach has a high potential for boosting the cost-effectiveness trade-off.

Citation Download Citation

Javier Portilla and Sergio Barbero "Hybrid digital-optical imaging design for reducing surface asphericity cost while keeping high performance ", Proc. SPIE 10694, Computational Optics II, 1069406 (28 May 2018); https://doi.org/10.1117/12.2312660

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