Use of localized performance-based functions for the specification and correction of hybrid imaging systems

Jerold B. Lisson; Darryl I. Mounts; Michael J. Fehniger

doi:10.1117/12.135942

12 August 1992 Use of localized performance-based functions for the specification and correction of hybrid imaging systems

Jerold B. Lisson, Darryl I. Mounts, Michael J. Fehniger

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Proceedings Volume 1656, High-Resolution Sensors and Hybrid Systems; (1992) https://doi.org/10.1117/12.135942
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

Abstract

Localized wavefront performance analysis (LWPA) is a system that allows the full utilization of the system optical transfer function (OTF) for the specification and acceptance of hybrid imaging systems. We show that LWPA dictates the correction of wavefront errors with the greatest impact on critical imaging spatial frequencies. This is accomplished by the generation of an imaging performance map-analogous to a map of the optic pupil error-using a local OTF. The resulting performance map a function of transfer function spatial frequency is directly relatable to the primary viewing condition of the end-user. In addition to optimizing quality for the viewer it will be seen that the system has the potential for an improved matching of the optical and electronic bandpass of the imager and for the development of more realistic acceptance specifications. 1. LOCAL WAVEFRONT PERFORMANCE ANALYSIS The LWPA system generates a local optical quality factor (LOQF) in the form of a map analogous to that used for the presentation and evaluation of wavefront errors. In conjunction with the local phase transfer function (LPTF) it can be used for maximally efficient specification and correction of imaging system pupil errors. The LOQF and LPTF are respectively equivalent to the global modulation transfer function (MTF) and phase transfer function (PTF) parts of the OTF. The LPTF is related to difference of the average of the errors in separated regions of the pupil. Figure

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Jerold B. Lisson, Darryl I. Mounts, and Michael J. Fehniger "Use of localized performance-based functions for the specification and correction of hybrid imaging systems", Proc. SPIE 1656, High-Resolution Sensors and Hybrid Systems, (12 August 1992); https://doi.org/10.1117/12.135942

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KEYWORDS

Imaging systems

Modulation transfer functions

Error analysis

Optical transfer functions

Wavefronts

Optics manufacturing

Spatial frequencies

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