Unique coating technology delivers high transmission from 800nm1,700nm. Osa apochromatic lens design in the shortwave infrared. Solutions include complete optomechanical and optoelectronic assembly and subassembly systems. Acuros cameras deliver visibletoswir band, high resolution images, at superior cost points compared to ingaas swir cameras. An assessment of the advantages and disadvantages for each of the lens design forms will be provided together with a discussion of producibility limitations. Although i have taken a great deal of effort to assure accuracy, the user of any of. Plastic diffractionlimited wideangle airspaced cooke. While advancements in the field over the past two centuries have done much to. Acuros cameras deliver visibleto swir band, high resolution images, at superior cost points compared to ingaas swir cameras. In this paper, several different broadband reflective and refractive lens design solutions are presented and compared. Lm25hcsw 1 25mm swir cmount lens lens for 73,00 buy online in the onlineshop of kowa over 70 years experience with lenses. Click on document introduction to lens design with practical zemax examples pdf. This paper will cover the design of an athermal lens mount for an infrared objective. The lens will image the earth through wavelengths of 35 micron.
A native of germany, riedl held technical and business leadership positions during the 45 years he lived in the united states. Microswir 640csx swap optimized camera sensors unlimited. Imaging in the short wave infrared swir band is useful in myriad. Xenics designs and markets swir image sensors, cores and cameras of bestinclass image, both linescan and areascan. Buy now 1 megapixel cmount industrial lens focal length 25mm optimized for swir. A thermal imaging continuous zoom system is developed with light weight for airborne optoelectronic detection and tracking. The process of designing lenses is both an art and a science. Spherical aberration often prevents a spherical lens from achieving diffractionlimited design. Challenges and solutions for high performance swir lens design.
We present a dualfield zoom lens designed for a cooled detector sensing across shortwave infrared swir and midwave infrared mwir spectral bands continuous imaging for 1 5 m. Custom swir optics for material sorting and inspection. Navitars fixed focal length swir hyperspectral lenses are specifically. Swir lenses have a super wide focal length 6mm and 8mm and low distortion of 0. Navitar designs, develops and manufactures innovative optical solutions for clients and. Design of a compact objective for swir applications. High transmission from 800nm up to 1900nm for applications such as solar cell inspection, waste sorting and biological research. The application of the sms method for imaging optic s was first introduced for the design of an ultrahigh numerical aperture rx lens com posed by two aspheric surfaces 9. Swir short wave infrared lenses are specifically designed for machine vision applications in nir and swir. This model is verified by measuring the dispersion of fabricated grin profiles across the vis swir spectrum. These lenses offer an industry standard cmount threaded style interface or, alternatively, they can be equipped with a custom mount interface. We fabricated the flat lens on a 6inch fused silica wafer. Paul klocek and marcel dekker, handbook of infrared optical materials 1991. In lens design with large computers, proceedings of the conference, institute of optics, government superintendent, rochester, new york.
Design and fabrication of large diameter gradientindex. Therefore, we propose a method of glass selection for apochromatic lens design in the. Request pdf ultracompact swir telephoto lens design with sms method in this work, we propose two new optical structures, using the simultaneous multiple surfaces sms method, comprised of 2. Optical design study and prototyp ing of a dualfield zoom. Using a lens designed for the visible spectrum will result in lower reso. Later, the method was extended for designing imaging optics.
Wolfe and zissis, the infrared handbook, office of naval research 1978 5. Swir vision systems introduces the acuros family of high definition cameras featuring cqd sensor technology. Swir, optical design, atmosperic transmission, zemax. Computars swir lenses are the industrys most compact form factor and are engineered for optimal performance. Highperformance infrared optical assemblies flir systems. Field guide to lens design 2012 bentley publications. Gardner and others published challenges and solutions for high performance swir lens design find, read and cite all the research you need on researchgate.
Max riedl, optical design fundamentals for infrared systems spie press, 2001 3. In the swir path the fnumber is adapted to the corresponding chip dimensions. Combining all requirements in pure silicon solutions is making a prestressed system. Juergens, infrared optical systems, practical optics seminar 2006 4. Swir series is a range of shortwave infrared lenses specifically designed to operate in the 0. Established in belgium in 2000, xenics is a designer and manufacturer of infrared sensors, cores and cameras. Solving for the desired focal length of the collimating lens yields. Keeping the lens short and mass low can easily result in high incidence angles which in turn complicates coating design, especially when extended beyond swir into the visible band. Since silicon sensors have an upper limit of approximately 1. The swir spectrum is an ideal choice for a variety of applications, including solar cell inspection, security, and biomedical imaging. Xenics offers inhouse design and manufacturing swir image sensors.
The lens design was performed with a cooled multifunction multiband detector developed by semi conductor devices scd, or similar multiband detector, in mind 9. The swir band is sufficiently close to the visible that the same constituent materials can be used for ar coatings covering both bands. Osa smsbased optimization strategy for ultracompact swir. Microswirtm 320csx camera milrugged, high sensitivity. Ultracompact swir telephoto le ns design with sms method. On designing swir to visible face matching algorithms. When utilized in conjuction with a swir camera, these lenses will permit imaging through silicon, imaging outdoors without additional illumination, detecting bruising on fruit, and a host of additional infrared. Lidar inspired by radar high emission power is key for range and reliability. This swir lens and camera series is ideal for quality assurance and material analysis for a wide variety of industries including semiconductor, biomedical, and agriculture industries. We have recently introduced a new and novel design with switchable zoom ranges with coplanar foci to provide a x12. Introduction to lens design with practical zemax examples pdf. Finally, the polychromatic grin design model is implemented into commercial design software and several design studies are presented which validate the beneficial chromatic properties of the titania silicate grin material. Consequently, swir provides the strong contrast needed for high resolution imaging. Materials for infrared optics melanie saayman opti 521 tutorial 1.
We designed and fabricated a flat multilevel diffractive lens mdl that is. Navitars fixed focal length swir hyperspectral lenses are designed for swir short wave infrared cameras and applications. The specially developed optical design and matching coatings provides optimal swir imagery for defence, machine vision and security applications. Using this method, we designed a flat lens for the parameters. The lens surfaces are rotational symmetr ic and calculated to have good control of nonparaxial rays. Optical design of a compact highdefinition dualfield zoom. The compact itarfree 640csx is sensors unlimiteds next generation swir video camera designed for applications requiring small size, weight, and power swap as well as high sensitivity.
However, the typical combination and selection method of glass materials for the visible band can hardly satisfy the apochromatic requirements of shortwave infrared swir lenses. Design for near and distant viewing distances is essentially identical. We have recently introduced a new and novel design with switchable zoom ranges with coplanar foci. In this paper, a dual field of view compact discrete zoom lens is presented which is designed for highdefinition uncooled ingaas detector. Introduction there are numerous glass types available for the visible spectrum, but there are only a small number of materials that can be used in the mwir midwave infrared. By shifting to swir range, constraints are relaxed, concentrating all efforts to cost reductions. Thebarleisa high resolution lens foruse with short wave infrared cameras. While advancements in the field over the past two centuries have done much to transform it from the former category to the latter, much of the lens design process remains encapsulated in the experience and knowledge of industry veterans. In this picture, water is darker in swir lighting which. Our products range from high magnification motorized zoom imaging systems to fisheye projection lenses used in a wide variety of industries. Gardner and others published challenges and solutions for high performance swir lens design find, read and. The surfaces of an aspheric lens are designed to minimize spherical aberration, thereby providing a robust single element solution for many applications, such as collimating the output of a fiber or.
The cameras are classified as nonitar, ear99 products, and are intended for use in applications. Comparing the acrylicpolycarbonateacrylic airspaced cooke triplet lens design with the other three plastic lens designs, the obtained results indicate that the acrylicpolycarbonateacrylic design can achieve the best image quality performance at 50% contrast 56 cyclesmm and strehl ratio 0. The alignment of the lrf with respect to the swir camera line of sight can be controlled by adjustable integrated wedges. This model is verified by measuring the dispersion of fabricated grin profiles across the visswir spectrum. Navitar designs, develops and manufactures innovative optical solutions for clients and enterprises across the globe. High efficiency near diffractionlimited midinfrared flat. Flir offers prototype development for high volume production, including programs with stringent environmental requirements for most. Oct 21, 2016 the swir band is sufficiently close to the visible that the same constituent materials can be used for ar coatings covering both bands. Highresolution, lowdistortion design offers megapixel clarity in hyperspectral application. However, the changed dispersion behavior of common optical glasses in swir band makes the correction of chromatic aberration in swir band challenging. Camera fnumber lens dependent available lenses 25 mm, 50 mm, 100 mm focus manual filtering 25. He teaches short courses and has published many papers on fundamental lens design, replicating optical elements, and diamond turning diffractive optical components for applications in the infrared spectrum. We have achieved designs with excellent performance, and with.
Beck optronic solutions offers a range of high performance fixed focal length lenses and a zoom lens suitable for use in the swir 0. Smsbased optimization strategy for ultracompact swir. Produces ultrahigh resolution at mid to long range working distances. Their unique coating technology delivers high transmission from 800nm1,700nm and are available in 16mm, 25mm, 35mm and 50mm focal lengths. Ultracompact swir telephoto lens design with sms method. Lens design as a proof of principle, we demonstrated a flat lens with the functionality of a cylindrical lens onedimensional focusing. But since the first lens bend in a meniscus shape at the early stages of the design, this constraint had to be released. It will experience large temperature changes and needs to remain in focus so imaging can occur continuously.
Features of megapixel swir zoom lens series incorporating kowas special coating technology to maximize transmission at the 1,000 to 1,800nm range. Therefore, we propose a method of glass selection for apochromatic. The designed lens operates at f7 in both zoom positions. Designed for near infrared nir and short wavelength infrared swir applications. Pdf challenges and solutions for high performance swir. Optical design fundamentals for infrared systems, second. This detector allows several modes of operation, imaging in both swir and mwir bands simultaneously and detecting laser designator spots 1. Another mechanical constraint imposed was a positive back focal length. This serie has been specifically designed to match the new 15 m format ingaas fpa focal plane arrays.
Swir hyperspectral lenses navitar optical solutions. Shortwave infrared swir light is typically defined as light in the 0. Infrared lens, zoom lens, mwir, lens design, aspheric surface abstract. In addition, the problem of designing and producing broadband ar coatings for such a wide wavelength region will be considered.
This objective will need to be able to survive a space environment. Optical design of a compact highdefinition dualfield. Navitars fixed focal length swir hyperspectral lenses are specifically designed for swir short wave infrared cameras and applications. This design uses the first lens second surface as second mirror, which is an elegant solution from the manufacturability point of view. The specially developed opticaldesign and matching coatings providesoptimal swir imagery for machinevision and security applications. The percival philosophy is similar to that used in modern spectacle lens design. Design of multiband optics using updated athermalachromatic. Chromatic aberration is an important artifact that influences image quality. Smsbased optimization strategy for ultracompact swir telephoto lens design.
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