Two-point resolution of Gaussian aperture operating in partially coherent light using various resolution criteria

Nayyar, V. P.; Verma, N. K.

doi:10.1364/ao.17.002176

Cited by 23 publications

(13 citation statements)

References 5 publications

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“…Authors discussing two-point resolution of partially coherent imaging systems are, among others, Grimes and Thompson, 21 McKechnie, 20 and Nayyar and Verma. 22 Grimes and Thompson stated that the only directly measurable quantity in the image of the two point sources is the separation between the two central maxima of the composite intensity distribution. Notice that thus the possibility of extracting analytic data from measurements by means of model fitting is disregarded.…”

Section: Resolution and Coherencementioning

confidence: 99%

Resolution: a survey

1997

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Section: Resolution and Coherencementioning

confidence: 99%

Resolution: a survey

1997

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“…Here we expand upon the finite Hankel transformation [56], as defined in Eq. (6), of Gaussian functions of the form exp−γgr 2 ∕w 2 , i.e., Z a 0 exp − γgr w 2 J 0 prrdr:…”

Section: Appendix A: Finite Hankel Transformationmentioning

confidence: 99%

Thermal effects in semiconductor saturable-absorber mirrors

et al. 2012

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“…R. Barakat [13] investigated application of apodization to increase two-point resolution of incoherent optical systems by means of Sparrow criterion. Nayar and Verma [14] studied two-point resolution of Gaussian aperture in partially coherent light. R. Barakat and E. Levin [15] further continued their study on resolution of incoherent objects of apodized optical systems.…”

Section: Introductionmentioning

confidence: 99%

Resolution of Two Unequally Bright Points of Apodized Optical Systems with Asymmetric Circular Antenna Arrays

Reddy¹,

Shailaja²,

Sagar³

2016

OPJ

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Sparrow criterion of resolution is used for assessment of the resolution of two object points of apodized optical systems under incoherent illumination of light. Semicircular arrays of circular aperture with discrete asymmetric apodization have suppressed side-lobes and a narrower central peak in the image plane termed as PSF good side on alternatively the right and left of the strong spectral point facilitates to detect the presence of weak spectral point in the vicinity of bright spectral point. The results of investigations on optimum discrete pupil function with semicircular arrays on the intensity distributions in the composite image of two object points with widely varying in their intensities under various degree of coherence of illumination have been studied. Sparrow resolution limits and the dip in central intensity as function of degree of coherence of the illumination (γ), intensity ratio (α), degree of asymmetric apodization (b) and number of discrete elements in semicircular array (n). The efficiency of aperture functions is discussed in terms of these parameters. Pupil function capabilities in redistribution of energy in composite image of two object points in close vicinity have been verified for different considerations. Current study has found an improvement in two-point resolution characteristics compared to their unapodized counter part. Fourier analytical properties of an optical system are presented for evaluation of this practical problem.

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Two-point resolution of Gaussian aperture operating in partially coherent light using various resolution criteria

Cited by 23 publications

References 5 publications

Resolution: a survey

Resolution: a survey

Thermal effects in semiconductor saturable-absorber mirrors

Resolution of Two Unequally Bright Points of Apodized Optical Systems with Asymmetric Circular Antenna Arrays

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