Computational imaging widefov monocentric light field camera. Optical design reasoning over the past years several customers asked me why we force the making of lenses with rather fast focal ratios. Computer experiment and global optimization of layered. Spectacle lens design the goal of the spectacle lens designer is to give the patient clear vision at all distances through any portion of the spectacle lens. What i am saying is that the design picture of the monocentric, is not monocentric because the curves of the elements as pictured, do not follow the language they provide which says that it is. Embodiments of the present invention comprise a monocentric lens as an objective lens that collects light from a scene. Panoramic fullframe imaging with monocentric lenses and. The monocentric is actually an old eyepiece design developed in the 1880s. The optical design employed monocentric objective lens design combined with the unique arrangement of multiaperture array, which empowers the system of good tradeoff between imaging performances and structural complexity.
In monocentric designs with the stop at the center of curvature and a monocentric image surface, the performance is the same for any field angle. To conform to the hemispherical focal plane of the lens, we use. Wedemonstrate thetradeoffbetweenspectralband,fnumberandlenscomplexity, andprovide. The design is a hybrid between the two implementations introduced in figures 4 and 5. Design and fabrication of silicontessellated structures. For our panoramic imager, we thus couple straight and curved fiber bundles made from schott 24as fiberoptic material to a monocentric lens see figure 1. Traditional lens systems suffer from significant distortion and loss of resolution with increased fov, and also tend to increase in size and complexity.
Monocentric multiscale mms lenses are a new approach to highresolution wideangle imaging, where a monocentric objective lens is shared by an array of identical rotationallysymmetric secondary imagers which each acquire one overlapping segment of a mosaic. The lens consisted of a thick cemented triplet, with an equiconvex barium crown flanked by borate flint negative meniscus elements. The monocentric lens design used in this camera solves these problems. I am not saying that the production and design did not look like this. Computer experiment and global optimization of layered monocentric lens systems. In contrast with conventional widefieldofview systems, multiscale design can also achieve nearly uniform resolution across the entire field of view. He has a very limited number of degrees of freedom. Click on document introduction to lens design with practical zemax examples pdf. A monocentric lens based multiscale imaging system is disclosed. Making and using a monocentric eyepiece from commercial. This design served its purpose in the 17th and 18th centuries, but is obsolete today. Optimization of twoglass monocentric lenses for compact panoramic.
Pdf monocentric lenses provide highresolution panoramic imaging onto a. Monocentric lens designs and associated imaging systems. Us9256056b2 monocentric lensbased multiscale optical. I would like to analyze this design for use in telescopes. A widefieldofview monocentric light field camera stanford. Since that mirror also shares the same common center of curvature in this bouwers design.
An imaging system with wide field of view fov and high resolution is proposed in this paper. Design and scaling of monocentric multiscale imagers core. A widefieldofview monocentric light field camera donald g. Lenses in this section may overlap with lens designs in other sections, for example the wollaston landscape lens is a single element and also a camera lens design. Monocentric lens based multiscale optical systems and methods of use. The ramsden is a positive eyepiece that can be used as a simple magnifier, meaning that the focal plane is in front of the field lens. Visible spectrum 2gs mc lens b mtf design performance and prescription. Monocentric optical designs are free of field dependent aberrations because they are com pletely symmetric.
Monocentric imaging system with wide field of view and high. Monocentric multiscale lenses further allow the implementation of an arbitrary field of view in camera volumes comparable to conventional single lens systems. This novel design of photographic objective underlay the monocentric eyepiece. Structural modifications zero operands, lens splitting, lens addition, lens removal, material selection 3 30. Nowadays, high accuracy and performance of critical to many machine vision system, a method that use telecentric lens. In order to meet the requirement of miniaturization, high image quality and large field of view of monitor lens, based on the characteristics of monocentric lenses, and the development of curved image sensors, we designed a monitor lens optical system and all refraction surfaces and its curved image surface have the same spherical center. Sep 10, 2014 page 2 of 4 making and using a monocentric eyepiece from commercial parts posted in eyepieces. Monocentric lensbased multiscale optical systems and. The design is still in use today, in very cheap binoculars and opera glasses. Monocentric lenses conventional optics cannot accommodate widefov lf capture, so we employ a monocentric lens built from concentric glass spheres.
Ive made mirrors and hand figured large lenses but a ball lens is something ive. This is due in part to the limitations of fisheye lenses, for which a fundamentally constrained entrance pupil diameter severely limits depth sensitivity. Monocentric multiscale mms lenses are a new approach to highresolution wideangle imaging, where. Osa field of view in monocentric multiscale cameras. The effect of add power on simultaneous vision, monocentric. The monocentric lens is ideal for wide fieldofview applications. May 23, 2016 in this paper, we introduce the design and implementation of a segmented, hemispherical, cmoscompatible silicon image plane for a 10mm diameter spherical monocentric lens. From this formula, we can directly get the meridional formula for a single symmetric or asymmetric monocentric lens. Just like a telescope, photographic objective, or any other optical device, ophthalmic lenses are designed to maximize performance. Here the monocentric meniscus lens corrects for the spherical aberration of the mirror. Pdf monocentric lenses provide highresolution panoramic imaging onto a spherical image surface.
Pdf monocentric lenses have proven exceptionally capable of high. Osa ray tracing in monocentric and ball lenses by a general. Optimization free parameters lens curvature, width, position, type of glass some can be fixed, other vary with focal length, focus e. In this paper, we introduce the design and implementation of a segmented, hemispherical, cmoscompatible silicon image plane for a 10mm diameter spherical monocentric lens. In one aspect, an optical imaging system includes an optical imaging module that collects light to form an image on an imaging surface, one or more imaging sensors each including an array of optical detectors located away from the imaging surface to.
In order to meet the requirement of miniaturization, high image quality and large field of view of monitor lens, based on the characteristics of monocentric lenses, and the development of curved image sensors, we designed a monitor lens optical system and all refraction surfaces and its curved image. We quantify image quality metrics such as spot size, field of view, and light efficiency along with manufacturing cost metrics such as index contrast and anisotropy. Monocentric lenses have recently changed from primarily a historic curiosity to a potential solution for. Kingslakejohnson lens design fundamentals, spie press, 2010 8. Kepler invented 1611 within a few years, the kepler eyepiece was invented. The design of miniaturization and super wide angle monitor. In this work, we derive a general raytracing formula for monocentric lenses based on a linear form of snells law.
Superwideangle mobile lens design based on monocentric lenses. A wide field of view monocentric lens system for an infrared aerial reconnaissance camera includes front and rear lens shell elements and a core lens element, with the number of front and rear shell lens elements depending on the ir band of interest lwir, mwir or swir. Tutorial of telecentric lens university of arizona. In one aspect, an optical imaging system includes an optical imaging module that collects light to form an image on an imaging surface, one or more imaging sensors each including an array of optical detectors located away from the imaging surface to receive light. Another assymetric version had an even thicker crown and forward flint with a thinner double extradense flint eye lens. Methods, systems, and devices are disclosed for capturing and forming large high quality images using monocentric optical imaging. The degree of curvature required to obtain significant benefits are particular to the specific optical requirements field of view, aperture, chromatic bandwidth, etc.
Design and scaling of monocentric multiscale imagers citeseerx. Design and scaling of monocentric multiscale imagers eric j. Kingslakejohnson lens design fundamentals, spie press, 2010. Visible spectrum 2gs mc lens b mtf design performance and prescription, c prototype photo and vnir 4ga mc lens d mtf design. For example in the monocentric lens design form, which. Aspheres correction with aspheres, forbes approach, optimal location of aspheres, several aspheres 4 06. A monocentric lens produces a spherical image, which we capture using tiled sensors and lenslet arrays 6. The final design shows that the mtf is larger than 0. The small eye lens makes peering through high magnification huyghenian oculars rather like looking through a pin hole. Panoramic monocentric imaging using fiber coupled focal. Geary lens design with practical examples, willmannbell 6. Monocentric lens geometries and algorithms for systematic optimization fig.
Pdf broadspectrum fibercoupled monocentric lens imaging. In our design process for a 3d curved fiber bundle with the required field of view, we define the taper ratio as well as the inputoutput surfaces see figure 2. A version was sold by zeiss as an astronomical eyepiece until the mid1950s. A legacy in lens design and optical engineering, 586508 18 august 2005. This is beyond the current spatial resolution and communications bandwidth of a single. A methodology to design optical systems with curved sensors. Superwideangle mobile lens design based on monocentric. Tutorial of telecentric lens haosheng hu college of optical sciences university of arizona december 6, 2016 introduction. If you flip a monocentric lens over to the other side of its common center of curvature nothing changes about the systems aberrations. Monocentric lenses support both a wide fov and a wide aperture but.
Special correction topics ii 20181211 herbert gross winter term 2019. The mojocentrics are my favorite eyepieces by far fixed my signature to reflect my new mojo. Smith modern optical engineering, graw hill 2000 5. Osa ray tracing in monocentric and ball lenses by a.
Patent of the month monocentric lens the triz journal. Pdf fibercoupled monocentric lens imaging researchgate. Wo2014074202a2 monocentric lens designs and associated. Oversampled triangulation of aware10 monocentric ball lens using an autostigmatic microscope. Infrared radiation entering the monocentric lens passes sequentially through the front shell lens elements, the core lens. Author links open overlay panel nan zheng a scott c. Malacaramalacara handbook of lens design, dekker 1994 3. Broadspectrum fibercoupled monocentric lens imaging. Brian blandford 2005 7 opic lens design tutorial edu plotting a spot diagram now create a map of the pattern of rays falling on the image. Transformation optics relay lens design for imaging from a. The mobile phone lens is composed of 4 monocentric lenses. For example in the monocentric lens design form, which uses spherical elements. Pdf a history of the photographic lens semantic scholar. Pdf oversampled triangulation of aware10 monocentric.
A scaling law for computational imaging using spherical optics. All of these formulas can be reduced to their corresponding paraxial forms, and their spherical aberration exact formulas can be easily derived. In this work we describe a novel, compact op tical design that couples a monocentric lens with multiple sensors using microlens arrays, allowing lf capture with. Optical design of ophthalmic lenses introduction we tend to prescribe ophthalmic lenses as though any lens with the right back vertex power will do. His eyepiece design consists of two plano convex crown lenses of equal focal lengths, separated by about 23d the sum of their focal lengths and with the plane surfaces facing outward away from each other. It consisted of a single divergent planoconcave lens, which provided an enlarged, upright image. Simple lenses are lenses consisting of a single element. Us9329365b2 wide field of view monocentric lens system. A lens design form can be a combination of positive optical power and negative optical power lens elements that share characteristics with each other. Field, aperture, pupil, magnification, infinity cases, lens makers formula, etendue, vignetting. List the lens data in the text window by clicking on len in the text window header. Optimization of twoglass monocentric lenses for compact panoramic imagers. Optimization of twoglass monocentric lenses for compact. In this work we describe a novel, compact optical design that couples a monocentric lens with multiple sensors using microlens arrays, allowing lf capture with an unprecedented fov.
Design and fabrication of silicontessellated structures for. Higher order aberrations high na systems, broken achromates, induced aberrations. Bentley field guide to lens design, spie press, 2012 7. Monocentric imaging system with wide field of view and.
Huyghenian eyepieces have a restricted afov and there isnt a lot of eye relief. Based on this analysis we identify and fully optimize a monocentric lens in combination with a todesigned grin image relay optic. Lens design is, therefore, a strong component of a wellrounded education in optics, and a skill valued by industries employing optical engineers. The eyepiece consists of a single triplet lens with all the curved lens surfaces having their centers of curvature at the same point. In lens design with large computers, proceedings of the conference, institute of optics, government superintendent, rochester, new york. Practical conditions specify lens materials, safety considerations fix lens thickness, fashion dictates lens. For example, solving this lens design only leads to a secondary design constraint, in that the total resolution of such wide angle lenses may easily exceed 100 megapixels. Leveraging capabilities of the lf representation, we propose a novel method for ef. Does anyone has a design for monocentric eyepieces. The center design shows a related compact design which sacrifices both resolution and light collection.
The luneburg lens is a special case of integrated lenses, with nonuniform refractive index, where ideally an incident plane wave is focused on the antipodal point on the lens surface, see figure 2b. Each sensor is coupled with a lens that decreases focal distance, allowing fov to overlap between adjacent sensors. Part of the lens design form is from the configuration, as it is important to be able to see the configuration of the lens and decipher what it. Our analysis indicates monocentric lenses imaging onto a curved detector outperform other systems for the same design constraints but do so at a cost in lens weight. Request pdf on jan 30, 2019, xiangyue meng and others published the design of miniaturization and super wide angle monitor lens based on monocentric lens find, read and cite all the research. Telecentricity, monocentric systems, anamorphotic lenses, scheimpflug systems 10 18. Optics of near to eye displays neds dave kessler, oasis 20 tel aviv, february 19, 20. The monocentric lens compared with a lytro illum and a conventional fisheye lens. Introduction to lens design with practical zemax examples pdf. Most of them were afraid that the optical correction of such lenses would not be satisfactory for nighttime observations. Design and scaling of monocentric multiscale imagers.
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