Sep 07, 2017 the efficiency in fresnel lenses is affected by three principal sources. Fresnel lens magnifier page magnifier bookmark magnifier. Shaped nonimaging fresnel lenses are suited for application as solar concentrators, or as collimators, or in lighting applications, where they can fulfil technological requirements as well as. Mathematical analysis of nonimaging fresnel lenses. Pdf performance analysis of nonimaging fresnel lens as. Figure 3 shows a fresnel lens, constructed in this way, which is used in the lighthouse at st augustine, florida, usa.
This study presents the design analysis of a fresnel lens concentrating pv cell which consists of a small linear fresnel lens and a strip pv cell. Geometrical optics is well understood, and this knowledge is readily available in handbooks 21, 66, 157. Nonimaging linear fresnel lens solar con centrator. Showcase of reproduction lighthouse fresnel lenses. Optical design using fresnel lenses basic principles and some practical examples the fresnel lens can be used in a wide variety of applications. Design of domeshaped nonimaging fresnel lenses taking. This work is focused on the optimization of domeshaped nonimaging fresnel lenses. Pdf design and machining of fresnel solar concentrator surfaces.
The television does not have to work, but the screen has to be intact to be able to use the lens. High concentration nonimaging fresnel lens design with flat. Design and machining of fresnel solar concentrator surfaces. For a detailed description of nonimaging fresnel lenses we refer the reader to the book by leutz and suzuki 2.
The truckview fresnel lens meets the crossrail vehicle safety equipment standard and is suitable for fitment to any vehicle working on the crossrail contract. Pdf performance analysis of nonimaging fresnel lens as a. Studying fresnel lenses means understanding geometrical optics. This lens demonstrates the two different classic lens styles, fixed and rotatng, and the light characteristic they display. Cheap fresnel lenses can be stamped or molded of transparent plastic and are used in overhead projectors and projection televisions.
For a nonimaging fresnel lens, the resulting curve of focal areas does not lie on the cross section of the petzval surface, as it does for a single lens. Evolutionary algorithm for optimization of nonimaging fresnel. In this study, an evolutionary algorithm ea, which consists of genetic and immune algorithms, is introduced to design the optical geometry of a nonimaging fresnel lens. The fundamental problem of the fresnel lenses is the beam divergence, which wasresolved by decreeing the output stain diameter on the image plane. However, both fresnel lens and parabolic dish concentrating pv systems need to be accompanied by a high accuracy suntracking system. The nonimaging fresnel lenses are usually domeshaped lenses integrated by a chain of prisms, and these have an acceptance semiangle, but it is possible to design nonimaging fresnel lenses with different shapes. Nonimaging fresnel lenses design and performance of.
Nonimaging achromatic shaped fresnel lenses for ultrahigh. In this paper, the optimal fresnel lenses are designed by zemax software. Concentrated solar energy systems using fresnel lenses fresnel lenses are used as solar concentrators since they offer high optical ef. Nonimaging optics also called anidolic optics is the branch of optics concerned with the optimal transfer of light radiation between a source and a target. Other readers will always be interested in your opinion of the books youve read. High performance fresnelbased photovoltaic concentrator. The lens is evaluated by tracing rays and calculating a projective optical concentration ratio. Although the authors already produced 500x domeshaped fresnel lens, its production process was complicated because of the shape. Lpis fresnel kohler fk concentrator design we have developed a kohlerbased cpv optical device with a flat fresnel lens as the primary optical element poe, and a single refractive surface as the secondary optical element soe. Fresnel lens are plastic sheet magnifiers, that can be used for magnifying anything and are also and effective solar fire starter, fresnel lenses are thin,cheap, lightweight magnifiers that come in many sizes,full page,page scanning size, credit card size magnifiers, bookmark size a fresnel lens has is a unique compact lens type that magnifies with concentric rings, instead of a convex lens.
Positive focal length fresnel lens used as a collimator. An optimum convex shaped nonimaging fresnel lens is designed following the edge ray principle. These fresnel lenses have better concentrating properties and higher e. You can often find these tvs for free or cheap on craigslist or at garage sales. Daylighting system based on novel design of linear fresnel lens. The book closes a gap in solar concentrator design, and describes nonimaging refractive optics and its numerical mathematics. The early fresnel lenses were cut and polished in glass an expensive process, and one limited to a few large grooves. Pdf fresnel lens is widely used in concentrating photovoltaic cpv. Build a fresnel lens solar cooker for free off grid world. Design of novel compound fresnel lens for highperformance. A numerical solution yields nonimaging lenses consisting of minimumdeviation prisms.
Which you will get, mostly in terms of nonimaging optics, complete with test results, and set against the competition of imaging fresnel lenses and mirror based. Center part of the dome lenses can be flat, which is beneficial for manufacturing dome shaped lenses. Thus, we cannot analytically find the offaxis shift in order to size and position the absorber. Mathematical analysis of nonimaging fresnel lenses using. Introduction to nonimaging optics chaves, julio download. Highlights we propose new design method of nonimaging fresnel lenses for solar concentrators with a certain acceptance half angle. Ralf leutz, akio suzuki, atsushi akisawa, and takao kashiwagi nonideal concentration of nonimaging linear fresnel lenses. If the outer surface of the lens must be smooth, the lens shape will be convex. Evaluation of a preheating system for solar desalination system with linear fresnel lens journal of. Which you will get, mostly in terms of nonimaging optics, complete with test results, and set against the competition of imaging fresnel lenses and. Us6804062b2 nonimaging concentrator lens arrays and.
Reproduction fresnel lenses artworks florida fresnel. Unlike traditional imaging optics, the techniques involved do not attempt to form an image of the source. Herein, a design procedure that incorporates a raytracing technique in the ea is described, and the validity of the design is demonstrated. The performance of fresnel concentrator is checked by testing the efficiency of solar cell, and the experimental results prove that the proposed design method of fresnel concentrator surfaces meets the application requirements on photovoltaic system. In this daylighting system, the novel design of linear fresnel lens significantly improves the uniformity of collector and distributor. Fresnel lenses should be properly displayed in a location as physically close as possible to the original, historic point of their installation such as a restored keepers quarters or local museum.
Whether youve loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. Designing the optimal fresnel lenses by using zemax software. We present a new design of compound fresnel r concentrator which is composed of two lenses. One lossless design is of high interest since it provides spectrally and spatially uniform flux without being affected by. Performance analysis of nonimaging fresnel lens as a primary stage for cpv units. Nonimaging fresnel lenses design and performance of solar. Concentration pv systems are emerging recently and primary lenses have been developed for concentrating solar incident. Design analysis of a fresnel lens concentrating pv cell. In this letter, shaped achromatic fresnel lenses are investigated. Shaped nonimaging fresnel lenses have been designed according to the edgeray principle, incorporating any combination of two acceptance halfangle pairs. In the event that a fresnel is to remain in the lantern room lit or unlit, a plan must be. However, we do not want to limit the readers to a single thermodynamic understanding of this subject.
Unfortunately, these equations for focal shortening as given do not hold true for fresnel lenses. Therefore, it can help to improve the performance of the daylighting system. Design and performance of solar concentrators springer series in optical sciences 83 leutz, ralf, suzuki, akio on. The efficiency in fresnel lenses is affected by three principal sources. The concentration and kohler integration functions are achieved by the lower surface. This fresnel lens is intended for use in evacuated tube type solar concentrators, generating mid. Pdf mathematical analysis of nonimaging fresnel lenses using. The structure of the linear fresnel lenses is designed by using matlab. Pdf design and machining of fresnel solar concentrator.
In contrast to previous fresnel lens concentrators, this design increases the acceptance angle, improves the irradiance. Therefore, two alternative perspectives of nonimaging optics will also be introduced and used throughout the tutorial. You can make your own fresnel lens solar cooker with a lens from a rearprojection television. This book offers a detailed and comprehensive account of the engineering of the worlds first nonimaging fresnel lens solar concentrator. Nonimaging achromatic shaped fresnel lenses for ultrahigh solar concentration. It is easy to forget that you, dear reader, may not be one of those who work inexactly the same field as we do. Thorlabs fresnel lenses offer light focusing and collimation without the bulk associated with traditional lenses. Though fresnel lens concentrators have been used in solar energy concentration systems since 1960s, due to the above said. Introduction to nonimaging optics chaves, julio introduction to nonimaging optics covers the theoretical foundations and design methods of nonimaging optics, as well as key concepts from related fields. Miniaturization of fresnel lenses for solar concentration bphot. Using two wave length allows to cover chromatic aberration. An optimum convex shaped nonimaging fresnel lens is designed following the edge ray.
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