Journal Article10.1016/0030-4018(82)90059-1
Focal shifts in diffracted converging spherical waves
131
TL;DR: In this paper, it is shown that the point of maximum intensity may not be at the geometric focus of the incident wave, but may be located closer to the aperture, and the result is interpreted as the combined effect of diffraction and the inverse square law.
read more
About: This article is published in Optics Communications. The article was published on 01 Apr 1982. The article focuses on the topics: Diffraction & Aperture.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Aberrations in confocal fluorescence microscopy induced by mismatches in refractive index
TL;DR: In this paper, the effect of refractive-index mismatch on the image acquisition process in confocal fluorescence microscopy is investigated theoretically, taking the vectorial properties of light into account.
761
Strehl ratio for primary aberrations: some analytical results for circular and annular pupils.
TL;DR: In this paper, a closed-form solution for the Strehl ratio was derived for imaging systems with circular and annular pupils aberrated by primary aberrations, except in the case of coma, for which the integral form was used.
209
Three-dimensional intensity distribution near the focus in systems of different Fresnel numbers
TL;DR: In this article, qualitative and quantitative arguments are presented that elucidate the modifications that the whole three-dimensional structure of the diffracted field undergoes as the Fresnel number is gradually decreased, and contours of equal intensity in the focal region are presented for systems of selected Fresnel numbers, which focus uniform waves.
196
•Journal Article
Three-dimensional intensity distribution near focus in systems of different Fresnel numbers (A)
Emil Wolf,Yajun Li +1 more
TL;DR: In this paper, qualitative and quantitative arguments are presented that elucidate the modifications that the whole three-dimensional structure of the diffracted field undergoes as the Fresnel number is gradually decreased, and contours of equal intensity in the focal region are presented for systems of selected Fresnel numbers, which focus uniform waves.
182
Focusing of diode laser beams: a simple mathematical model.
Amir A. Naqwi,Franz Durst +1 more
TL;DR: A simplified mathematical model for the far field of a monomode diode laser is employed for easy but fairly accurate computations of the optical field in the focal region and the results of computations are shown to agree well with the measurements.
139
References
Focal shifts in diffracted converging spherical waves
TL;DR: In this paper, it was shown that when the incident wave is uniform and the angular semi-aperture is small, the ratio of the point of maximum intensity to the distance between the geometrical focus and the plane of the aperture depends only on the Fresnel number N of the image when viewed from the focal point.
341