Lwir lens design pdf

Comparison of the thermal effects on lwir optical designs. Spherical aberration often prevents a spherical lens from achieving diffractionlimited design. Principles enabling more compact sizes at the same lens brightness xr glass, with its superior lightbending power, makes it possible to design a shortbarrel lens with the same lightgathering ability aperture value as a longbarrel lenseven with a smaller lens diameter. Refractive dual band infrared imager optical design international. Zinc sulfide is another common material that is used in both the mwir and the lwir. This paper will compare a typical high volume therm al imaging design manufactured from discrete lens e lements to a similar design optimized for manufacture through a wafer based approach. The total length of the geznsege triplet lens is shorter than the sigesi triplet lens by 47. Flir offers prototype development for high volume production, including programs with stringent environmental requirements for most. Edmund optics prides itself on understanding how customers implement imaging technology in their applications. Pdf challenges and solutions for high performance swir lens. The design has been done using zemax optical design program and the performance of the system at focal plane was investigated by the help of seidel aberrations, modulation transfer function mtf, spot diagram and optical path difference opd fan plot. Xenics offers inhouse design and manufacturing swir image sensors. The lens has a relative large image circle of mm, which is compatible with a 640. Broadband lightweight flat lenses for longwaveinfrared imaging monjurul meem, 1 sourangsu banerji, 1 apratim majumder, 1 fernando guevara vasquez, 2 berardi sensalerodriguez, 1 and rajesh menon, 1, 3 a 1department of electrical and computer engineering, university of utah, salt lake city, ut 84112, usa.

The bass instrument is a high sensitivity mwir and lwir nonimaging spectrometer operating at low spectral resolution r 100 and moderately fast focal ratio f3. We experimentally demonstrate imaging in the longwaveinfrared lwir spectral band 8. Introduction to infrared vision resources opto engineering. Scd hercules idca and ophir 28850mm motorized continuous zoom lens for cooled cameras used. Materials for infrared optics melanie saayman opti 521 tutorial 1.

Norbert schuster1 john franks1 1 umicore electrooptic materials belgium jan dot verplancke at eu dot umicore dot com. Comparison of the thermal effects on lwir optical designs utilizing different infrared optical materials. Optikos, the leader in image quality test equipment, is pleased to offer this compact, efficient, easytouse quality control tool. Mwir and long wavelength infrared lwir bands is different and needs distinct detectors. Fresnel lens combined with a 755 mthick refractive silicon lens was used to report the thinnest lwir lens total device thickness. Custom lens mount thirdparty lenses may require a different flir or custom mount as well as knowledge of. Reducing the weight and thickness of lwir optics is crucial for increasing the range of cameracarrying drones as well as for reducing head and. A practical approach to lwir wafer level optics for. Broadband lightweight flat lenses for longwave infrared. Design of multiband optics using updated athermalachromatic. These objectives are design, built, and tested in the usa for high optical performance. Pdf refractive dual band infrared imager optical design. In the catalog you will find ir lenses for mwir and lwir imaging, for cooled and uncooled ir cameras, motorized and zoom lenses.

Spie 9451, infrared technology and applications xli, 2015 glass maps for the swirmwirlwir glass maps for the swir, mwir, and lwir show a lack of correlation of. Broadband lightweight flat lenses for longwaveinfrared imaging. Spie 9451, infrared technology and applications xli, 2015 glass maps for the swirmwir lwir glass maps for the swir, mwir, and lwir show a lack of correlation of. Spie 8012, infrared technology and applications xxxvii, 801224. When your application requires perfect vision, you know where to turn. The software may take up to 30 seconds to load the first time. For this polarimeter design a set of four linear polarizers are used at orientations 0, 45, 90 and 5 degrees. Reducing the weight and thickness of lwir optics is crucial for increasing the range of cameracarrying drones as. Opticalthermal properties of several lwir lens materials property symbol unit ge1 znse2 zns3 ge.

Xenics designs and markets swir image sensors, cores and cameras of bestinclass image, both linescan and areascan. Two major factors determine how bright an object appears to a thermal imager. Xenics not only specialises in the development of swir ingaas detectors and cameras, but also offers an extensive portfolio of mwir and lwir imagers. Iivi os offers a standard series of focusing imaging lenses for both mwir and lwir thermal bands. Design of imaging infrared spectrometer using dyson lenses. 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. With the acquisition of new england optical systems, flir is the premier developer and supplier of high performance infrared optical assemblies in the midwave infrared mwir, longwave infrared lwir, shortwave infrared swir and multispectral wavebands. A highorder silicon fresnel lens made out of silicon was used in combination with an aperture for wideangle imaging in the lwir band as well 21, which had a total device. In lens design with large computers, proceedings of the conference, institute of optics, government superintendent, rochester, new york. A midwave infrared mwirlongwave infrared lwir dualband zoom lens design with multilayer diffractive optical elements mldoes is presented. Umicore designing athermal lenses for longwave infrared. This paper contains the full design process of a wideangle lens used for lwir earth sensors from paraxial power allocation calculation to optimization of lens. Although i have taken a great deal of effort to assure accuracy, the user of any of.

Infrared optics for ir night vision, thermal imaging and flir. Santa barbara harbor mwir video produced by ircameras, llc scd hercules idca and ophir 28850mm motorized continuous zoom lens for cooled cameras used in the following application. The aspheric design enables a single lens to replace complex multiple component optical system. Optec produces various models of standard zoom lens like the worldwide famous 75500mm, the 24140mm, and the upcoming 20200 mm now in final engineering phase. Optical design with zemax for phd advanced seminar 8. Thermal math model cooling profile lens temperature profiles mos section thermal design operational profile transition time, hold time planned activities. An 80 mthick polymer fresnel lens combined with a 755 mthick refractive silicon lens was used to report the thinnest lwir lens total device thickness. Introduction to infrared vision primer on ir theory. The mathematical relationship between the substrate material selection for dualband mldoe and polychromatic integral diffraction efficiency pide is deduced in the oblique incident situation, and further, a method.

Refractive lens design for simultaneous swir and lwir imaging. Quantitative comparison of the chalcogenide glass gasir with germanium and silicon for use in lwir sensor lens design. Ir optical system design of uncooled thermal imaging camera in. These cameras are easy to integrate and very simple to use. Ir optical system design of uncooled thermal imaging camera. Spherical aberration is the principal driver keeping the image surface close to the rear surface of the dyson lens. The main cost for these lens designs comes from the number of lenses used. This tutorial describes how this defocus affects the system.

Scott sparrold, eric herman, amber czajkowski, and kevin oshea refractive lens design for simultaneous swir and lwir imaging, proc. Ir optical system design of uncooled thermal imaging. 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 and lwir longwave infrared spectral bands. This product provides a high degree of flexibility in frame frequency, user interface and temperature range to make it adapt to various industrial environments and the harsh working environment in the wild. Comparing a mwir and lwir polarimetric imager for surface swimmer detection. Infrared optics for ir night vision, thermal imaging and. Comparison of the thermal effects on lwir optical designs utilizing different. The defender thermal imaging cameras provide healthy detection ranges from 5 kilometers up to 60 kilometers. May 03, 2017 this paper contains the full design process of a wideangle lens used for lwir earth sensors from paraxial power allocation calculation to optimization of lens. Tolerancing ii 20150128 herbert gross winter term 2014.

This knowledge allows us to quickly deploy the right option from our offtheshelf products or a custom designed solution to meet your specific requirements. Run the flir camera controller gui by clicking on the start menu and accessing startall programs flir systemscamera controller gui. Lens files for the optimized airspaced geznsege and. A practical approach to lwir wafer level optics for thermal. Zinc sulfide is commonly manufactured by chemical vapor deposition cvd. Uncooled thermal imaging cameras an uncooled infrared camera is one in which the imaging sensor does not require cryogenic cooling. Cooled versus uncooled cameras for long range surveillance to other infrared wavebands. No broadband lwir metalenses have been demonstrated so far. Cleartran is the most commercially available clear zinc sulfide and it can be used for windows and lenses from the visible through to the lwir. Norbert schuster1 john franks1 1 umicore electrooptic materials belgium.

Infrared radiant energy is determined by the temperature and emissivity of an object and is characterized by wavelengths ranging from 0. Pdf twolens designs for modern uncooled and cooled ir. Longwave infrared lenses for high resolution detectors. Gardner and others published challenges and solutions for high performance swir lens design find, read and cite all the research you need on researchgate. Umicore quantitative comparison of the chalcogenide. Alternatively, other polarization elements can be used to measure circular. Osa design of dualband infrared zoom lens with multilayer. Longwave infrared lenses, lwir series, is a range of longwave infrared lenses specifically designed to operate in the 814. Lwir series is a range of longwave infrared lenses specifically designed to operate in the 814. The cost of a lens is to a large extent determined by the number and complexity of the optical components. A polarizer is placed after each mini lens to measure a different polarization state across the object. Athermalization techniques in infrared systems jeffrey t daiker opti 521 december 6, 2010 abstract a major area of concern when designing infrared systems is the defocus with temperature change due to the nature of lens materials. Iivi os also provides customized imaging lenses engineered and built to customer requirements for the vis, swir, mwir, and lwir. One or two element designs with an emphasis on lowcost manufacturing.

For more than 40 years, computar has been the world leader in optics across industries including intelligent traffic systems, machine vision, defense, security and life sciences. Aluminum is frequently used as housing, for example, a 20mm long aluminum housing will increase by 28 microns if the temperature increases for 60. The lens achieves a high resolution solution in terms of modulation transfer function mtf. The sigesi triplet lens design can be used for the mwir and lwir spectral bands, whereas the geznsege triplet lens can be used only for the lwir spectral band. A guide to thermalimaging cores from flir acal bfi have more than four decades of experience supplying and designing worldclass, thermalimaging solutions for oem manufacturers and system design and integrator providers across europe. If demanding thermal imaging is your assignment, the irtcm hd series of uncooled infrared thermography stationary cameras is your first choice solution. Dyson spectrometer a working design to make the spectrometer usable, the object and image planes require relief from the dyson lens to allow for slit and fpa placement. Lens temperature profiles mos section thermal design. Optical design of wideangle lens for lwir earth sensors. All objects with an absolute temperature over 0 k emit infrared ir radiation. Highperformance infrared optical assemblies flir systems. Technical n o t e cooled versus uncooled cameras for. Quantitative comparison of the chalcogenide glass gasir with.

Lenscheck lens testing systems portable and precise for visnir through lwir lens measurements a costeffective solution to your production and prototype lens qualification needs. Design of an imaging infrared spectrometer using compact dyson lenses mr. Moreover, the lens materials have been used as nf 2, lif and baf 2 in this six lens system. It has a 12 m pitch vanadium oxide vox uncooled detector, a resolution of 640 x 512 and its available with various lens options, so youre sure to find a configuration thats just right for your next project. Mwir lwir collimating lenses have a high numerical aperture for maximum light collection for collimating light from mwir and lwir lasers, including quantum cascade lasers qcl. A highorder silicon fresnel lens made out of silicon was used in combination with an aperture for wideangle.

Designing athermal lenses for longwave infrared systems introduction due to advances in materials and manufacturing technologies, the vast majority of lenses used on longwave infrared lwir cameras are simple. Cooled cameras also can be designed to work in the longwave infrared or lwir band. Guide to thermal imaging cores european leader in advanced technology solutions consult. Optical bench thermal design thermal shroud, internal. May 20, 2011 this paper will demonstrate the steps to achieve a petzval lens with fast aperture and moderate field that is achromatic in the swir and has low axial color in the lwir. Challenges and solutions for high performance swir lens design. In this paper, we present the preliminary optical design of panic panoramic near infrared camera for calar alto, a widefield infrared imager for the calar alto 2. Optical design fundamentals for infrared systems, max riedl, spie. The mathematical relationship between the substrate material selection for dualband mldoe and polychromatic integral diffraction efficiency pide is deduced in the oblique incident situation, and further, a method for optimal selection of. Lens type fix fixed focal fixed focal length, very simple and compact design.

Irtcm hd 1024 lwir infrared cameras precision thermography with up to 2048. The camera optical design is a folded single optical train that images the sky onto the focal plane wi th a plate scale of 0. Flir boson 640 compact lwir thermal camera core ici. The design has been done using zemax optical design program and the performance of the system at focal plane was investigated by the help of seidel aberrations, modulation transfer. Lwir infrared lens opto engineering longwave infrared lenses. Comparison of the thermal effects on lwir optical designsspie. Comparison of the thermal effects on lwir optical designs utilizing. Comparison of the thermal effects on lwir optical designsfinal.

We demonstrate, with simulations corroborated by experiments, that broadband longwave infrared lwir imaging is possible with a single flat lens with a thickness of 10. Mwirlwir collimating lenses have a high numerical aperture for maximum light collection for collimating light from mwir and lwir lasers, including quantum cascade lasers qcl. Broadband lightweight flat lenses for longwaveinfrared. 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. Oct 22, 2019 we demonstrate, with simulations corroborated by experiments, that broadband longwave infrared lwir imaging is possible with a single flat lens with a thickness of 10. Quantitative comparison of the chalcogenide glass gasir. Introduction to lens design with practical zemax examples pdf. Comparing a mwir and lwir polarimetric imager for surface. Homeland security watch the ir thermal imaging real life demo. The flir boson 640 longwave infrared lwir thermal camera core sets a new standard for size, weight, power, and performance. Thermal design and analysis sang park thermal engineer july 6th, 2004 sp 1.

In lwir design, hyperion optics optical designers also conduct thorough calculation of what happens to the housing with the impact of thermal expansion. These lenses can also be equipped with custom mount interfaces. Preliminary optical design of panic, a widefield infrared. The defender series of cameras come in a wide selection of long range lens choices.