In two papers [ Proc. SPIE 4471, 272–280 (2001) and Appl. Opt. 43, 2709–2721 (2004)], a logarithmic phase mask was proposed and proved to be effective in extending the depth of field; however, according to our research, this mask is not that perfect because the corresponding defocused modulation transfer function has large oscillations in the low-frequency region, even when the mask is optimized. So, in a previously published paper [ Opt. Lett. 33, 1171–1173 (2008)], we proposed an improved logarithmic phase mask by making a small modification. The new mask can not only eliminate the drawbacks to a certain extent but can also be even less sensitive to focus errors according to Fisher information criteria. However, the performance comparison was carried out with the modified mask not being optimized, which was not reasonable. In this manuscript, we optimize the modified logarithmic phase mask first before analyzing its performance and more convincing results have been obtained based on the analysis of several frequently used metrics.

© 2010 Optical Society of America

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
Log in to access OSA Member Subscription

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
Log in to access OSA Member Subscription

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
Log in to access OSA Member Subscription

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
Log in to access OSA Member Subscription

Related Journal Articles

• Compressed imaging system with linear sensors (OL)
• Random projections based feature-specific structured imaging (OE)
• Improved logarithmic phase mask to extend the depth of field of an incoherent imaging system (OL)
• Parametric fuzzy sets for automatic color naming (JOSAA)
• Rational phase mask to extend the depth of field in optical-digital hybrid imaging systems (OL)

Related Conference Papers

• Quantitative Performance Metrics with Long Wave Infrared Multiple Aperture Cameras
• 3-D Mobile Virtual Reality Simulations and Animations Using Common Modern Displays
• Integrated Coded Aperture Imaging in Optical Region
• Quasi-Cylindrical Digital Hologram by Superposition of Digital Holograms Recorded on Concyclic Positions
• 3-D Fluorescent Particle Tracking with Nanometer Scale Accuracies Using a Double-Helix Point Spread Function