Apply these principles and knowledge to various optical systems with tolerancing analysis. 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. Imaging fundamentals of fourier optics, physical optical image formation, imaging in zemax 12 04. In order to achieve a telecentric lens design, all. Creating highaccuracy telecentric lenses for machine vision systems. Telecentric lenses are designed to have a constant magnification regardless of the objects distance or location in the field of view. Solutions include complete optomechanical and optoelectronic assembly and subassembly systems. Tutorial of telecentric lens university of arizona.
Shims follow the same basic concepts as spacers, but are used for fixed magnification lenses such as telecentric lenses. Optimal lens design and use in laserscanning microscopy. The mml or machine micro lens product line showcases a wide selection of high end compact, fixed magnification telecentric lenses. Courses zemax opticstudio wavelength optoelectronic. Lecture optical design with zemax for phd part 8 8. Detailed laser processing with ftheta lenses jenoptik. Optical design and calculations were performed using zemax ee 64bit ver.
Video telecentric lenses navitar optical solutions. By providing your key serial number in this form, upon receipt of your information, your organizations license administrator will. Which coefficients should i use to model the optical ray tracing. Lens design opti 517 syllabus university of arizona. Such telecentric lenses are designed with the chief rays collimated and. In section 2, we present the lens structure and simulation results using commercial ray tracing software. Optical design of a new folding scanning system in mems. In section 3, a method for fabricating a lens holder using micromachining techniques is described. For this there will be a significant amount of practical lens design homework. Beginning with the initial structure, the final optimized ftheta is achieved with zemax optical design software.
We have set new standards in bi telecentric technology by constantly improving optical performances, quality control procedures and the ease of use of telecentric lenses. With its powerful psd algorithm, synopsys can do in one second a. In addition, it used cots lenses for the themis allsky imager, a joint project between nasa and canadian space agency for groundbased imagers to photograph aurora. Standard telecentric lenses accept ray cones whose axis is parallel to the main optical axis. Easily calculate telecentric magnification and field of view. When only first two terms exist, which is the case in our design, the period number of the diffractive surface n is given by 5 2. Image space telecentric lenses are useful for a variety of applications, e. In the example above, the now front element is quite small i remembered my olympus zuiko 501. Currently we have more than 120 projects in progress, an average of 1 new project per month. Modeling a lens that is telecentric in image space zemax. A book list of references is provided in appendix a. Solution of exercises lecture optical design with zemax. Also, some recent advanced product of telecentric lens or systems. Telecentric lenses are designed to have a constant magnification.
Sometimes, i see myself punching in the parameters that are needed for a lens design, and i can press a button to get the desired performance of the system. Pdf optical design of a new folding scanning system in. We have worked with several large contractors and companies including bae, northrop grumman, and large consumer electronics companies to design lenses to meet their specifications. If you have not yet been invited to myzemax, you can request access by submitting this form. More info on zemax get to a qualified design faster. In addition, it used cots lenses for the themis allsky imager, a joint. Learn userdefined merit functions, and learn and practice advanced lens designs for photographic systems, telecentric lenses. Edmund optics telecentric lenses are available with a range of features for a variety of machine vision or inspection applications.
Software codev, radiant zemax optics studio, oslo, synopsys, optalix must get on board asap. Then, the initial structure parameters are determined by pw method. In january 2017 alone, at least 17 zoom lens patents were issued. Zemax optical design fileviewing software creates shared files opticsviewer software allows engineers to share, view, and validate native opticstudio design files to ensure optical systems meet manufacturing requirements. The true telecentric lens has a zero field of view in practice this means that its field of view is limited to the diameter of the lens front element. Machine vision is the technology and process by which machines automatically inspect and analyze.
Telecentric lenses however keep the size of objects. There is no shortage of lens optimization software on the market to deal with todays complex optical systems for all sorts of custom and standardized applications. Telecentricity, infinity object distance and afocal image, localglobal. In this article, we discuss three different methods of making a lens that is telecentric in image space in opticstudio. These refer to the exit and entrance pupil locations of an optical system. Understand optical systems with first and third, higher order analysis and aberration theory. Object space and image space are the two types of telecentricity. The custom design of a telecentric lens requires the use of ray tracing software such as zemax as well as a mechanical design software to create the lens element mechanics and lens barrel. Creating highaccuracy telecentric lenses for machine. Image space telecentric lenses have their exit pupil located at infinity. A key component of a machine vision system is its telecentric lens, which offers the best possible. Lens spacers, shims and focal length extenders edmund optics. We work with zemax and essential macleod simulationoptimization software.
The simplest way to make a lens telecentric is to put the. Furthermore, telecentric lenses are more scale preserving when the workpiece is defocussed. Lens design with computational software like zemax and codev are the norm now. The designed ftheta lens is compact with the simple structure and large working area. Optical design and custom lens manufacturing services theia technologies offers optical engineering design services along with highend lens manufacturing. Explore design principles such as bending, symmetry, stop shift, and lens splitting. Design of a hybrid diffractiverefractive achromatized. But all of these software packages share one critical flaw. If you enter an areaofinterest aoi smaller than the full sensor size, the calculator will assume the aoi is centered on the sensor, and that vignetting is acceptable outside the aoi. Creating highaccuracy telecentric lenses for machine vision systems machine vision is the technology and process by which machines automatically inspect and analyze. Our experience in many application fields allows us to offer specific solutions.
This attribute is ideal for many machine vision measurement applications, as measurements of an objects dimension will be independent of where it is located. Sign in access to the myzemax customer portal is by invitation only. Plasma imaging optics gunner eye piece for battle tank. Leading optical product design software for engineering.
The software described in this manual is furnished under a license agreement and may be used or. The hr 5m series, which offers the best overall performance and was designed for the increasingly popular 5 mega pixel cameras, the high resolution hr series, and the standard compact st series models provide a wealth of solutions for machine vision systems. A key component of a machine vision system is its telecentric lens, which offers the best possible vision for the machine. Learn what telecentric lenses are and how to create highaccuracy telecentric lenses for. By the aid of optical engineering software zemax, a telecentric optical system is designed, which uses a 1 inch ccd image sensor with 5. If you optimize with a planoconvex lens with the stop in front of the lens zemax will give you the rear. These graphs show the theoretically calculated modeling results from zemax for the field curvature, distortion, relative illumination, and modulation transfer function mtf for our telecentric lenses. In the above hybrid refractivediffractive achromatized telecentric f. Finally, according to design index of the lcos miniprojection lens, a u. This means that the chief rays oblique rays that pass through the center of the aperture stop are parallel to the optical axis in front of or behind the system, respectively.
Principles of nonlinear optimization, optimization in optical design. Zemax optimization lens for laser diode collimating critical airspace doublet. For example, lets assume youre using an 8 mm diagonal 12 size sensor, and that your aoi is the entire sensor surface. Correction i symmetry principle, lens bending, correcting spherical aberration, coma, stop position, astigmatism, field flattening, chromatical correction, retrofocus and telephoto setup, design method 11. The custom design of a telecentric lens requires the use of ray tracing software. Selection of a telecentric lens is straightforward. Our products range from high magnification motorized zoom imaging systems to fisheye projection lenses used in a wide variety of industries including life sciences, industrial. Zemax delivers design software, training, and support services that set the highest standards for the optical and illumination industries. Cooke triplet and as telecentric lens double gauss and derivatives tessar lens tolerancing. This tutorial introduced the concept and set up for the objectspace telecenric system and imagespace telecentric system and advantages of telecentric lens that can impact the system performance. Moreover the optical wavefront is completely asymmetric since incoming telecentric. Synopsys is one of the largest and most powerful lens design programs in the world, with features found nowhere else. Continuing the bestselling tradition of the authors previous books, lens design, fourth edition is still the most complete. For example, if the workpiece is moved away from the lens, but the tilt of the laser beamis vanishing, the spot position will not change.
In recent years the use of machine vision technologies in dimensional measurement applications has become very popular. Navitar designs, develops and manufactures innovative optical solutions for clients and enterprises across the globe. Frequently asked questions about optics design optics for hire. In order to achieve a telecentric lens design, all of the chief rays rays from. Popular optical design programs include zemax, code v, fred, and trace pro. The posted files are a sampling of some of the subcategories ive been interested in, including compact zooms for dsc cameras, high quality zooms for fullframe photography, and lenses for television cameras with large zoom ratios. Therefore, if you design a telecentric lens system with it, you will get a perfect telecentric system. Click on the icons in the table below to see performance graphs for the telecentric lens. The design of double telecentric lens with large aperture based on. Telecentric lenses tutorial resources opto engineering. Adhering to the aim to create unique product design for customers, hyperion optics has devoted itself to achromatic doublet design and other achromatic doublet related products for many years. Telecentric lenses usually show a more homogeneous focus size distribution over the full field. Uv dual telecentric lens with working wavelength of 240nm320nm, working distance of 98.
Telecentric scanning lenses introduction telecentric scanning lenses are a special configuration in which the arrangement of optics are designed to focus down the beam such that it is always perpendicular to the flat field figure 10. This tool swaps out lenses in a design to the nearest equivalent candidate out of a. In order to meet the requirements of high precision and high resolution in industrial inspection, this article designed a set of uv double telecentric lenses with wide spectrum, low distortion, low magnification, and high resolution according to market requirements. 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. The company has incorporated them into telecentric lenses and cameras with narrow band filters andor image diameter reduction. This is accomplished by ensuring that the system stop is located at the front focal point of the lens system.
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