Using MTF data to simulate lens performance

Henrik Eliasson

doi:10.1117/12.759370

3 March 2008 Using MTF data to simulate lens performance

Henrik Eliasson

Proceedings Volume 6817, Digital Photography IV; 68170O (2008) https://doi.org/10.1117/12.759370
Event: Electronic Imaging, 2008, San Jose, California, United States

Abstract

In many situations it is desirable to obtain an image that visually describes measured lens MTF data. Since the sharpness of a camera lens changes continuously across the field of view, the characteristics of the lens need to be determined at many positions within the image. In short, the proposed simulation method consists of two parts. First, the point-spread function (PSF) at a limited number of field positions is constructed using Zernike polynomials. The polynomial coefficients at a specified field position are determined by fitting the calculated MTF for these PSFs to the measured MTF data. The other part interpolates Zernike coefficients for all other relevant positions within the image. In this way it is possible to find a sufficiently accurate PSF at any arbitrary field point. By utilizing a generalized non-translational invariant summation of PSFs, the sharpness at any field point in the image can be simulated. This system also has the advantage that the sharpness at different focusing positions can be determined quite easily. It is also a fairly simple matter to include effects such as distortion and vignetting. In the present paper, examples of simulations are shown and advantages as well as drawbacks of the method are discussed.

Citation Download Citation

Henrik Eliasson "Using MTF data to simulate lens performance", Proc. SPIE 6817, Digital Photography IV, 68170O (3 March 2008); https://doi.org/10.1117/12.759370

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