Survey on zoom-lens calibration methods and techniques
Sign Up to like & getrecommendations! Published in 2017 at "Machine Vision and Applications"
DOI: 10.1007/s00138-017-0863-1
Abstract: This paper surveys zoom-lens calibration approaches, such as pattern-based calibration, self-calibration, and hybrid (or semiautomatic) calibration. We describe the characteristics and applications of various calibration methods employed in zoom-lens calibration and offer a novel classification… read more here.
Keywords: calibration approaches; zoom lens; calibration; lens calibration ... See more keywords
Calibration Procedure of Camera With Multifocus Zoom Lens for Three-Dimensional Scanning System
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Access"
DOI: 10.1109/access.2021.3100311
Abstract: With zoom lenses, both the magnification of the camera and the distance between the lens and the object plane can be changed. Changes to zoom lens magnification is accompanied by changes in the depth of… read more here.
Keywords: calibration; procedure; zoom lens; multifocus zoom ... See more keywords
Method for monocular camera to estimate principal point and calibrate zoom lens
Sign Up to like & getrecommendations! Published in 2019 at "Optical Engineering"
DOI: 10.1117/1.oe.58.11.113101
Abstract: Abstract. We present an improved calibration method to optimize and simplify the current principal point estimation model and the zoom lens calibration process. A Euclidean distance weighting model (EDWM) for the principal point is constructed,… read more here.
Keywords: estimate principal; principal point; zoom lens; point ... See more keywords
Optical design of a 2× zoom lens for miniature imaging systems
Sign Up to like & getrecommendations! Published in 2019 at "Optical Engineering"
DOI: 10.1117/1.oe.58.8.085107
Abstract: Abstract. The optical design of a compact 2 × zoom lens in a lens barrel for miniature cameras is reported. The magnification in the optical system is achieved by means of changing positions of lens elements… read more here.
Keywords: system; zoom lens; miniature; zoom ... See more keywords
Alpha-band Activity Tracks the Zoom Lens of Attention
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cognitive Neuroscience"
DOI: 10.1162/jocn_a_01484
Abstract: Voluntary control over spatial attention has been likened to the operation of a zoom lens, such that processing quality declines as the size of the attended region increases, with a gradient of performance that peaks… read more here.
Keywords: lens attention; activity tracks; zoom lens; attention ... See more keywords
Zoom lens with high zoom ratio design based on Gaussian bracket and particle swarm optimization.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.418970
Abstract: In this paper, we use Gaussian brackets and a particle swarm optimization (PSO) algorithm to design a 20× four-group zoom lens with a focus tunable lens and two moving groups. This method uses Gaussian brackets… read more here.
Keywords: zoom lens; particle swarm; swarm optimization; zoom ... See more keywords
Optimal focal length search and design of a compact zoom lens based on a telecentric intermediate image.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.465967
Abstract: The design of a compact zoom lens requires a designer's most abundant and professional skills and experience, which increases the difficulty of zoom lens miniaturization. In this paper, an automatic optimal focal length search method… read more here.
Keywords: zoom; focal length; zoom lens; compact zoom ... See more keywords
Three-component zoom lens with fixed position of optical center.
Sign Up to like & getrecommendations! Published in 2019 at "Applied optics"
DOI: 10.1364/ao.58.003844
Abstract: A method is proposed for calculation of initial parameters of a three-element zoom lens with an identical position of object and image principal planes of the optical system and approximately zero Petzval sum. Such an… read more here.
Keywords: fixed position; position optical; optical center; zoom lens ... See more keywords
X-ray zoom lens allows for energy scans in X-ray microscopy.
Sign Up to like & getrecommendations! Published in 2019 at "Optics express"
DOI: 10.1364/oe.27.000185
Abstract: We introduce a new design and development of a compound refractive X-ray zoom lens for energy scans in X-ray microscopy. Energy scans are, in principle, equivalent to radial scans in the reciprocal space for X-ray… read more here.
Keywords: microscopy; energy scans; ray; zoom lens ... See more keywords
Automated design of a slim catadioptric system combining freeform surface and zoom lens.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.457422
Abstract: The development of electronic industry demands miniaturization for zoom lens. Freeform surfaces and catadioptric lens system play important roles in the compactness of optical design. However, the initial structure of the catadioptric system is relatively… read more here.
Keywords: zoom; system; catadioptric system; initial structure ... See more keywords
Programmable Zoom Lens System with Two Spatial Light Modulators: Limits Imposed by the Spatial Resolution
Sign Up to like & getrecommendations! Published in 2018 at "Applied Sciences"
DOI: 10.3390/app8061006
Abstract: In this work we present an experimental proof of concept of a programmable optical zoom lens system with no moving parts that can form images with both positive and negative magnifications. Our system uses two… read more here.
Keywords: light modulators; spatial light; system; zoom lens ... See more keywords