The Experts below are selected from a list of 2643 Experts worldwide ranked by ideXlab platform
Andrew R Harvey - One of the best experts on this subject based on the ideXlab platform.
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experimental demonstration of hybrid imaging for miniaturization of an optical Zoom Lens with a single moving element
Optics Letters, 2011Co-Authors: Mads Demenikov, Ewan Findlay, Andrew R HarveyAbstract:We experimentally demonstrate a miniaturized Zoom Lens with a single moving element based on the concepts and analysis described in Opt. Express17, 6118 (2009).OPEXFF1094-408710.1364/OE.17.006118 We show that the implementation of either a cubic or a generalized cubic phase-modulation function makes miniaturization possible in addition to providing extended-depth-of-field imaging. We present recovered images for Zoom Lenses employing both phase-modulation functions and conclude that the generalized-cubic-phase function yields higher image quality without the artifacts present for the pure-cubic-phase function.
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miniaturization of Zoom Lenses with a single moving element
Optics Express, 2009Co-Authors: Mads Demenikov, Ewan Findlay, Andrew R HarveyAbstract:We present an analysis of single-moving-element Zoom Lenses in the thin-Lens limit and show how the length of these Zoom Lenses is determined by the Zoom-factor, sensor-dimension and the depth-of-focus. By decreasing the sensor size and extending the depth-of-focus, the lengths of these Zoom Lenses can be reduced significantly. As an example we present a ray-traced design of a miniaturized single-moving-element Zoom Lens with a 2.3 x Zoom-factor and show how the exploitation of modern miniaturized detector array combined with wavefront coding enables a reduction in length of almost three orders-of-magnitude to 10mm.
Mads Demenikov - One of the best experts on this subject based on the ideXlab platform.
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experimental demonstration of hybrid imaging for miniaturization of an optical Zoom Lens with a single moving element
Optics Letters, 2011Co-Authors: Mads Demenikov, Ewan Findlay, Andrew R HarveyAbstract:We experimentally demonstrate a miniaturized Zoom Lens with a single moving element based on the concepts and analysis described in Opt. Express17, 6118 (2009).OPEXFF1094-408710.1364/OE.17.006118 We show that the implementation of either a cubic or a generalized cubic phase-modulation function makes miniaturization possible in addition to providing extended-depth-of-field imaging. We present recovered images for Zoom Lenses employing both phase-modulation functions and conclude that the generalized-cubic-phase function yields higher image quality without the artifacts present for the pure-cubic-phase function.
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miniaturization of Zoom Lenses with a single moving element
Optics Express, 2009Co-Authors: Mads Demenikov, Ewan Findlay, Andrew R HarveyAbstract:We present an analysis of single-moving-element Zoom Lenses in the thin-Lens limit and show how the length of these Zoom Lenses is determined by the Zoom-factor, sensor-dimension and the depth-of-focus. By decreasing the sensor size and extending the depth-of-focus, the lengths of these Zoom Lenses can be reduced significantly. As an example we present a ray-traced design of a miniaturized single-moving-element Zoom Lens with a 2.3 x Zoom-factor and show how the exploitation of modern miniaturized detector array combined with wavefront coding enables a reduction in length of almost three orders-of-magnitude to 10mm.
Jiri Novak - One of the best experts on this subject based on the ideXlab platform.
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paraxial analysis of three component Zoom Lens with fixed distance between object and image points and fixed position of image space focal point
Optics Express, 2014Co-Authors: Antonin Miks, Jiri NovakAbstract:This work performs an analysis of basic optical properties of Zoom Lenses with a fixed distance between object and image points and a fixed position of the image-space focal point. Formulas for the calculation of paraxial parameters of such optical systems are derived and the calculation is presented on examples.
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paraxial analysis of four component Zoom Lens with fixed distance between focal points
Applied Optics, 2012Co-Authors: Antonin Miks, Jiri NovakAbstract:Zoom Lenses with a fixed distance between focal points are analyzed. Formulas are derived for the primary design of basic parameters of a four-component Zoom Lens. It is also demonstrated that a three-component Zoom Lens can be analyzed using derived formulas. Zoom Lenses with such a design can be used in a 4-f system with variable magnification or as a part of a double side telecentric Lenses with variable magnification.
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method of Zoom Lens design
Applied Optics, 2008Co-Authors: Antonin Miks, Jiri Novak, Pavel NovakAbstract:Optical systems with variable optical characteristics (Zoom Lenses) find broader applications in practice nowadays and methods for their design are constantly developed and improved. We describe a relatively simple method of the design of Zoom Lenses using the third-order aberration theory. It presents one of the possible approaches of obtaining the Seidel aberration coefficients of individual members of a Zoom Lens. The advantage of this method is that Seidel aberration coefficients of individual elements of a given optical system can be obtained simply by solving of a set of linear equations. By using these coefficients, one can determine residual aberrations of the optical system without detailed knowledge about the structure of its individual elements. Furthermore, we can determine construction parameters of the optical system, i.e., radii of curvature and thicknesses of individual elements of a given optical system. The proposed method makes it possible to determine which elements of the optical system can be designed as simple Lenses and which elements must have a more complicated design, e.g., doublets or triplets.
Antonin Miks - One of the best experts on this subject based on the ideXlab platform.
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paraxial design of a four component Zoom Lens with zero separation of principal planes and fixed position of an image focal point composed of members with constant focal length
Applied Optics, 2019Co-Authors: Antonin Miks, Pavel NovakAbstract:Our paper presents a detailed theoretical analysis of a four-component Zoom Lens with coincident principal planes, fixed position of the image focal point, and an approximately corrected Petzval sum. New formulas enabling the calculation of paraxial parameters of such optical systems are derived, and the practical application of these formulas is shown in an example. The position of the optical center of these optical systems does not depend on the object distance (for a given value of focal length of the Zoom), and the position of the image focal point (with respect to the last element of the system) is fixed during the operation of the Zoom. Such optical systems could be used in various measuring systems in photogrammetry, computer vision, triangulation sensors, fringe projection techniques, surveying, machine vision, etc.
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paraxial analysis of three component Zoom Lens with fixed distance between object and image points and fixed position of image space focal point
Optics Express, 2014Co-Authors: Antonin Miks, Jiri NovakAbstract:This work performs an analysis of basic optical properties of Zoom Lenses with a fixed distance between object and image points and a fixed position of the image-space focal point. Formulas for the calculation of paraxial parameters of such optical systems are derived and the calculation is presented on examples.
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paraxial analysis of four component Zoom Lens with fixed distance between focal points
Applied Optics, 2012Co-Authors: Antonin Miks, Jiri NovakAbstract:Zoom Lenses with a fixed distance between focal points are analyzed. Formulas are derived for the primary design of basic parameters of a four-component Zoom Lens. It is also demonstrated that a three-component Zoom Lens can be analyzed using derived formulas. Zoom Lenses with such a design can be used in a 4-f system with variable magnification or as a part of a double side telecentric Lenses with variable magnification.
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method of Zoom Lens design
Applied Optics, 2008Co-Authors: Antonin Miks, Jiri Novak, Pavel NovakAbstract:Optical systems with variable optical characteristics (Zoom Lenses) find broader applications in practice nowadays and methods for their design are constantly developed and improved. We describe a relatively simple method of the design of Zoom Lenses using the third-order aberration theory. It presents one of the possible approaches of obtaining the Seidel aberration coefficients of individual members of a Zoom Lens. The advantage of this method is that Seidel aberration coefficients of individual elements of a given optical system can be obtained simply by solving of a set of linear equations. By using these coefficients, one can determine residual aberrations of the optical system without detailed knowledge about the structure of its individual elements. Furthermore, we can determine construction parameters of the optical system, i.e., radii of curvature and thicknesses of individual elements of a given optical system. The proposed method makes it possible to determine which elements of the optical system can be designed as simple Lenses and which elements must have a more complicated design, e.g., doublets or triplets.
Ewan Findlay - One of the best experts on this subject based on the ideXlab platform.
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experimental demonstration of hybrid imaging for miniaturization of an optical Zoom Lens with a single moving element
Optics Letters, 2011Co-Authors: Mads Demenikov, Ewan Findlay, Andrew R HarveyAbstract:We experimentally demonstrate a miniaturized Zoom Lens with a single moving element based on the concepts and analysis described in Opt. Express17, 6118 (2009).OPEXFF1094-408710.1364/OE.17.006118 We show that the implementation of either a cubic or a generalized cubic phase-modulation function makes miniaturization possible in addition to providing extended-depth-of-field imaging. We present recovered images for Zoom Lenses employing both phase-modulation functions and conclude that the generalized-cubic-phase function yields higher image quality without the artifacts present for the pure-cubic-phase function.
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miniaturization of Zoom Lenses with a single moving element
Optics Express, 2009Co-Authors: Mads Demenikov, Ewan Findlay, Andrew R HarveyAbstract:We present an analysis of single-moving-element Zoom Lenses in the thin-Lens limit and show how the length of these Zoom Lenses is determined by the Zoom-factor, sensor-dimension and the depth-of-focus. By decreasing the sensor size and extending the depth-of-focus, the lengths of these Zoom Lenses can be reduced significantly. As an example we present a ray-traced design of a miniaturized single-moving-element Zoom Lens with a 2.3 x Zoom-factor and show how the exploitation of modern miniaturized detector array combined with wavefront coding enables a reduction in length of almost three orders-of-magnitude to 10mm.
