Optical software maker zemax acquired by investment firm. Fresnel lens as a collimator c negative focal length fresnel lens as a divergent 12. Lens design, gives insight into the engineering problems of each lens design type and practical solutions that are expensive to discover independently. They are fused silica objective lenses that offer minimal absorption for extremely powerful lasers. Opticstudio and opticsbuilder are the tools of choice for scientists and engineers designing imaging optics, such as telescopes, cameras, and sensors for the mars rover, and twophoton microscopes for neurological imaging. Employing the optical design software zemax, according to the preset parameters mentioned above, we designed the whole memsbased folding scanning optical system, in which the ftheta telecentric lens group and wideangle lens group are the two key components. Apparently its possible to make one combining a wide angle converter and a close up filter. Optical design concept and method were detailed in our preceding paper. Replacement protective windows for the f theta scan lenses sold above are available here. The group used a twostep process to layer and polish the lenses and the result is 3d printed lenses that can be used for photography or even customized. We accidentally found this f theta lens drawing and we are very interested in it. Optical design and calculations were performed using zemaxee 64bit ver. Zebase 6 includes a copy of milton laikins book, lens design, and includes designs from the book as well as many other sources. Nowadays, a large variety of scanning systems utilizing these devices are commercially available.
The fact that our ceo, steve, has over twenty years of experience with lens design software as well as thirty years of optical design and manufacturing experience means that were ready for even the most complicated optical design problems. By employing the optical design software zemax, a foldaway uniform scanning optical system based on mems has been designed, and the scanning uniformity and spot size of the system on the target plane. Elento of radiant zemax notes that to improve the speed of design, opticstudio performs smart data caching so that lengthy calculations are only recomputed when necessary. Nevertheless, modern optical design software allows for reasonably simple ftheta lens. Additionally, the compact design of the ftheta lens allows the user to reduce the number of optical components needed to provide a flat image plane. Zemax delivers design software, training, and support services that set the highest standards for the optical and illumination industries. F theta lens supplies an image in accordance with the socalled f theta conditions. Optical design benefits from interconnected software. This can be seen in the application info tab or in the enlarged image in the visible scan lens for laser scanning microscopy.
I have enjoyed a lot of product development based on optics and lens design. These lenses are able to realize tighter spot sizes, which translate into higher resolution for scanning or printing, as. In zemax software with the lens width definition, it is possible to design the fresnel lens in radial and cylindrical modes, it is obvious that the width of the radial fresnel lens is zero 10,11. Incorporating commercial offtheshelf lenses into your optical designs. Lens properties, imaging, magnification, paraxial approximation and modelling 4 06. Optical design for personal computers powerful, easy to use optical design software from sky scientific can help you develop designs from a single lens or mirror to complex systems with up to 99 surfaces. Here, the glass of f5 is selected as the thick lens material. Optical lens design is made up of many disciplines, one of which is imaging lenses. Designing the optimal fresnel lenses by using zemax software. Detailed laser processing with ftheta lenses jenoptik.
Shanghai optics is great in optical lens designs, but most important, we are an optical manufacturer. The structure of the collimator is shown in figure1. Scan lens systems are often simplified in optical modeling programs by. However, when the full image circle is considered, it is obvious that the lens has nonzero distortion. The thesis titled long wave infrared scan len design and distortion correction. Additionally, the compact design of the f theta lens allows the user to reduce the number of optical components needed to provide a flat image plane. Opticaldesign programs encompass lens and illuminator design, analysis, and tolerancing, as well as photometrically tailored design and the interface with external computeraideddesign software. One of the most popular is certainly the f theta lens used in laser scanning systems to produce a constant scan velocity across the image plane we call it f theta distortion. Finally my question sorry, just wanted to give some context. A telecentric ftheta lens differs from a normal ftheta lens in that the axis of the focused laser beam bundle is perpendicular to the scanning plane throughout. When you select a company for optical design, it pays to work with someone who understands not only design but manufacturability. Thorlabs ftheta lenses consist of an airspaced 2 or 3element design and are.
If a perfect lens is idealized in a software as one surface, there are principal. The optical design of the new ftheta lens has been performed with the simulation software zemax. Ulo optics understands the need to keep your system running, which is why we carry replacement stock for the most commonly used laser optics around the world, such as trumpf and bystronic or amada flat bed cutters. In this paper, the design of the fthea lens with large working area is described in detail. The design and the quality of the optical components play a key role in the lens performance. Object is placed at front focal plane of an objective lens, and an image is given at back focal plane of an imaging lens.
Process micromaterials with high precision with our ftheta lenses. Unick explained, cots lenses are an inexpensive design shortcut to quick prototyping for highquality, low to mid. The designed f theta lens is compact with the simple structure and large working area. Our f theta lenses for 1064 nm deliver high scan linearity and high power handling, generating a small and uniform spot throughout a flat image plane. As reported on todays medical developments, northwestern university engineers have developed a 3d printing method to produce customized optical components, 5mm x 5mm diameter, in about 4 hours. Modelling of optical systems principal purpose of calculations.
Ftheta lenses are designed with a barrel distortion that yields a displacement that is. Fisheye lens designs and their relative performance james jay kumlera, martin bauerb acoastal optical systems, 4480 south tiffany drive, west palm beach, fl 33407 binternet pictures corporation, 1009 commerce park drive, oak ridge, tn 37830 abstract new panoramic and immersive digital imaging developments have generated increased interest in high performance fisheye. Sometimes, i see myself punching in the parameters that are. Optical design and calculations were performed using zemax ee 64bit ver.
Beginning with the initial structure, the final optimized ftheta is achieved with zemax optical design software. This paper proposes a method for the optical system design of uniform scanning in a larger scan field of view fov in 3d imaging lidar. Ftheta lenses solve many of the problems associated with laser scanning. It is well known that many optical systems have distortions. Silverline ftheta objective lenses from jenoptik have been specially developed for applications that use highpower and shortpulse lasers. Is there free software that will allow me to simulate and design this stuff. Continuing the bestselling tradition of the authors previous books, lens design, fourth edition is still the most complete and reliable guide for detailed design information and procedures for a wide range of optical systems. Standard lenses focus the laser beam on a spherical surface in contrast to an ideal flat or plane field. Telecentric ftheta lenses require very large lens diameters for long scanning paths lens diameter approx. This guide is a birdseyeview of all the optical systems and lens design forms out there, and will be an essential tool for any lens designers toolbox. He has over 20 years of experience in various areas, which include lens designs in fields of eyepiece, 3d projection design, 3d confocal optics, doe, ftheta lens, optical system with vir, nwir, mwir, lwir, gaussian beam propagation, cell phone lens design, machine vision, mirror system design, telescope. Handbook of optical systems, vol 15, wiley, 2005 10.
Jan 20, 2006 the paper provides the new type construction of laser confocal microarray scanning and fluorescent detection system. Sensor spherical lens infinity anamorphic adapter infinity variable strength diopter. Magnification for fundamental optical system is shown in figure. Our ftheta lenses are used in various applications from industrial material. The windows have an ar coating optimized for 1064 nm the design wavelength of the f theta lenses and the 450 to 700 nm range allowing a visible laser to be used for alignment purposes. Although the calculation methods are classic, with the help of a spreadsheet, we will do a stepbystep lens design that makes all of the steps and theory make sense. The adjacent plot shows departure from perfect linear ftheta mapping for each of the full field fisheye lenses.
Led by expert optical engineers, our handson courses teach the most useful optical design techniques. Optical design and performance of ftheta lenses for highpower and highprecision applications. The folding scanning optical system we designed can not only scan in a large angle field, which is greater than 60, but also obtain small spot size at distance of about 160 m, where the spot size is less than 10 cm. Fisheye lens designs and their relative performance. See if you can eliminate an element or improve the performance in an all spherical design by using an asphere. Projection lenses microscopes objectives field flatteners laser beam expanders f theta lenses zoom lenses, and more optical design collection zebase 6 zemax zemax llc 22908 ne alder crest drive, suite 100 redmond, wa 98053, usa t. Optical design and manufacturing expert shanghai optics.
Optimal lens design and use in laserscanning microscopy. For convenience, optical models discussed here and detailed in appendix tables 1 10 10 can be downloaded directly from or alternatively they can be made available upon request. Beginning with the initial structure, the final optimized f theta is achieved with zemax optical design software. Properties of optical systems i 20121023 herbert gross. We doesnt provide f theta lens design products or service, please contact them directly and verify their companies info carefully. Examples of lens design with different image projections. The enabling key component, ftheta lenses, is designed as micrometer focusing scanning lens. The scanning position is defined as the distance from the scanning mirror to the end of the externally threaded region on the scan lens housing. In laserscanning microscopy often an offtheshelf achromatic doublet is used as a scan lens which can reduce the available diffractionlimited fieldofview fov by a factor of 3 and introduce chromatic aberrations that are scan angle dependent. Optical systems design 3 zemax optics studio the zemax optical design program is a comprehensive software tool. The ftheta silverline lens 170355140 in the wavelengthrange of 355 nm. Employing the optical design software zemax 17, according to the preset parameters mentioned above, we designed the whole memsbased folding scanning optical system, in which the ftheta telecentric lens group and wideangle lens group are the two key components.
The mirror tilts for each configuration were input to the zemax model and rays were. They are often used in a scanning system with two galvanometer mirrors. But all of these software packages share one critical flaw. Thorlabs telecentric scan lenses are ideal for use in laser scanning imaging systems and applications such as optical coherence tomography oct, confocal laser scanning microscopy, and multiphoton imaging. Smith practical computeraided lens design, willman bell, 1998 1 introduction 4 literature on optical design. Optical design software zemax, optical product design. There are also many useful figures to help visualize the main issuesconsiderations of lens design. 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. A tutorial for designing fundamental imaging systems. Pdf ftheta lenses are widely used in remote laser processing. To introduce the design principles of lens and mirror optical systems and the evaluation of designs using modern computer techniques. Telecentric scan lenses produce a flat image plane and a spot size that suffers minimal dist. We outline the shortcomings of commercially available achromatic doublets as scan and tube lenses and propose several lens designs of superior quality. All are for folded zooms, which provide an interesting study.
In figure 5, a 0% intercept can be found for any of the wavelengths shown. Optical coherence tomography system and simulation duration. The lectures will cover lens design, aberrations, optimization, tolerancing and image quality metrics. However, i looked up the literature and have not found any type. Other readers will always be interested in your opinion of the books youve read. The opticstudio opticaldesign software by radiant zemax, mentioned earlier, is an example of an opticaldesign package that has illuminationsystem design capabilities built in. The use of f theta lenses provides a plane focusing surface and almost constant spot size over the entire xy image plane or scan field. Osa optical design for uniform scanning in memsbased 3d. Some designs require premium or professional editions. Optical design of a new folding scanning system in memsbased. Oct 03, 2018 but all of these software packages share one critical flaw.
Osa optimal lens design and use in laserscanning microscopy. One mirror is responsible for beam deflection in one direction and the second one for the perpendicular direction. The zemax code in the book is a bit dated by now but most users should be able to still use it for newer editions of the software. Ftheta lenses are widely used in remote laser processing. The designed ftheta lens is compact with the simple structure and large working area. Optical design collection zebase 6 requirements zebase must be used with opticstudio or zemax optical and illumination design software. Optical design of a new folding scanning system in mems. It is used for high speed micro drilling of printed circuit boards, highspeed marking of electronic parts and resin parts, etc. The design and the quality of the optical components play a key role in the lens. The lenses with close parameters for each projection were found and then additionally optimized by zemax to match with image formation equation for each projection. The book not only covers theory of lens design but the author also delves into the math using practical examples. Ftheta lenses are the standard lenses for galvoscannerbased laser marking, engraving, and cutting systems. Below we present examples of lens for each projection.
Our engineers use the right lens design process with the knowledge of manufacturing process and limitations and cost. Bentley field guide to lens desifn, spie press, 2012. We also have a selection of galilean laser beam expanders, with up to 20x expansion ratio and low wavefront distortion, for use at wavelengths from the uv to nir in low and high energy applications. The thesis titled photographic fisheye lens design for 35mm format cameras. Eckhardt optics llc optical design and manufacturing. Pdf optical design and performance of ftheta lenses for. The most popular is the ftheta lens used in laser scanning system to produce a constant scan velocity across the image plane. By only specifying distortion at one point in the field, it is possible to misrepresent a nonzero distortion lens as having 0% distortion. Optimization in optical design, global optimization methods, solves and pickups, variables, sensitivity of variables in optical systems. This lens focuses a laser beam scanned with a scanner, etc. Geary lens design with practical examples, willmannbell 6.
This enables us to achieve highly consistent optical properties throughout series production. A variable strength diopter is an optical system that varies its strength depending on the distance between its elements. In addition, i would like to thank zemax for giving me permission to use their software for designing and evaluating the optical systems in this project. Optics tutorial 2 lens and focusing basics youtube. Zebase 6 is a collection of over 600 sequential optical designs in opticstudio format on cd. Pdf optical design and performance of ftheta lenses for high.
The control of optical distortion is useful for the design of a variety of optical system. Actually we were doing other wide angle system design. Employing the optical design software zemax, a folding scanning optical system based on mems mirror is designed thereafter. We offer the ftheta objective lenses as a standard selection or can adapt them to meet your exact requirements. Zebase 6 includes a copy of milton laikins book, lens design. How are images formed in wide angle lenses optics for hire. Employing the optical design software zemax, according to the preset parameters mentioned above, we designed the whole memsbased folding scanning optical system, in which the f theta telecentric lens group and wideangle lens group are the two key components. In addition to these standard designs, we can develop complete systems for. This guide will tackle how lens design was done before optical design software on computers were invented, which i will call the classic method for lens design.
Then, the initial structure parameters are determined by pw method. In order to create small and precise structures, the design. As i described in a paper at the 2014international optical design conference, this class of optics is interesting be they are of a reasonable complexity that the designs are likely to be instructive, they offer a small range of design constraints because of the standardization of cmos imager sizes. Many authors have designed during the last 20 years distortion control corrector. Free version of the winlens3d optical design package, which provides serious design and analysis tools for optical engineer, student or designer. The diffractionlimited, multipleelement, airspaced lens design is optimized for a flat field in the image plane and low ftheta distortion. Optical design for uniform scanning in memsbased 3d. Or another similar opensource free software to analyze optics like lens.
Spc measuring station automation measurement and evaluation software. Zemax software is used to develop a range of products including space telescopes, augmented reality glasses, lidar in autonomous vehicles, smartphone cameras, and biomedical imaging devices. Or another similar opensource free software to analyze optics like lens aberrations, ray tracing and image. The theoretical formulas are derived for the design scheme. Opticstudio is the leading software used by optical engineers throughout the design phase. Development of ftheta lens for uv lasers sumitomo electric. Now i want to use a concave mirror to form an image of an point object with a realsize, for example 10nm et al. D, and my expertise is optical lens design, nonimaging illumination lens design. We accidentally found this ftheta lens drawing and we are very interested in it. Lens design with computational software like zemax and codev are the norm now. Ftheta lenses are designed to focus a laser beam onto a planar image plane.
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