Abstract

The traditional edge method (TEM) is applicable only in areas whose knife edges are horizontal or vertical. The slant edge method (SEM) requires using the approximate function in the edge spread function (ESF) fitting. The ESF sample is uneven and therefore affects the accuracy of the estimated point spread function (PSF). This study proposes a novel slant edge method (NSEM), including a knife-edge area extraction algorithm that ensures the evenness of the ESF sample and a PSF estimation algorithm that directly fits the line spread function, to improve the accuracy of the estimated PSF. The validity and applicability of the NSEM have been proven in theory and practice, respectively. Compared with the TEM and SEM, the NSEM exhibits a clear improvement in accuracy and stability across the three experiments conducted in this study.

© 2015 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Regularized slanted-edge method for measuring the modulation transfer function of imaging systems

Xufen Xie, Hongda Fan, Anding Wang, Nianyu Zou, and Yuncui Zhang
Appl. Opt. 57(22) 6552-6558 (2018)

Error of the slanted edge method for measuring the modulation transfer function of imaging systems

Xufen Xie, Hongda Fan, Hongyuan Wang, Zebin Wang, and Nianyu Zou
Appl. Opt. 57(7) B83-B91 (2018)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (3)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (24)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription