Easily calculate telecentric magnification and field of view. If you have not yet been invited to myzemax, you can request access by submitting this form. Detailed laser processing with ftheta lenses jenoptik. 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. Design and study of lcos miniprojection lens based on zemax. Creating highaccuracy telecentric lenses for machine. Telecentric lenses however keep the size of objects. In section 2, we present the lens structure and simulation results using commercial ray tracing software. For example, lets assume youre using an 8 mm diagonal 12 size sensor, and that your aoi is the entire sensor surface. This approach naturally leads to much better optical benchmarks such as telecentricity, resolution and distortion compared to other. Pdf optical design of a new folding scanning system in.
Lecture optical design with zemax for phd part 8 8. Which coefficients should i use to model the optical ray tracing. A key component of a machine vision system is its telecentric lens, which offers the best possible vision for the machine. Apply these principles and knowledge to various optical systems with tolerancing analysis. The other lens types behave pretty much like the human eye things that come nearer appear to grow. In order to achieve a telecentric lens design, all of the chief rays rays from.
Creating highaccuracy telecentric lenses for machine vision systems. In section 3, a method for fabricating a lens holder using micromachining techniques is described. 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. Telecentric lenses usually show a more homogeneous focus size distribution over the full field.
Our experience in many application fields allows us to offer specific solutions. In the above hybrid refractivediffractive achromatized telecentric f. Telecentricity, infinity object distance and afocal image, localglobal. 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. Machine vision is the technology and process by which machines automatically inspect and analyze. 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.
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. The simplest way to make a lens telecentric is to put the. 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. The design of double telecentric lens with large aperture based on. 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. Design of a hybrid diffractiverefractive achromatized. 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. Telecentric lenses are designed to have a constant magnification regardless of the objects distance or location in the field of view. A key component of a machine vision system is its telecentric lens, which offers the best possible. 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. But all of these software packages share one critical flaw.
Frequently asked questions about optics design optics for hire. Currently we have more than 120 projects in progress, an average of 1 new project per month. Also, some recent advanced product of telecentric lens or systems. 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. 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. Understand optical systems with first and third, higher order analysis and aberration theory. In the example above, the now front element is quite small i remembered my olympus zuiko 501. A book list of references is provided in appendix a. Telecentric lenses are designed to have a constant magnification. By the aid of optical engineering software zemax, a telecentric optical system is designed, which uses a 1 inch ccd image sensor with 5. Solutions include complete optomechanical and optoelectronic assembly and subassembly systems.
This tool swaps out lenses in a design to the nearest equivalent candidate out of a. Zemax optimization lens for laser diode collimating critical airspace doublet. Video telecentric lenses navitar optical solutions. Determine the necessary magnification factor by dividing the sensor areaofinterest aoi by the desired field of view.
Continuing the bestselling tradition of the authors previous books, lens design, fourth edition is still the most complete. Image space telecentric lenses are useful for a variety of applications, e. In this article, we discuss three different methods of making a lens that is telecentric in image space in opticstudio. Depending on requirements such as wavelength range, field of view, and resolution, a telecentric design will differ in the quantity, size, and material used. Moreover the optical wavefront is completely asymmetric since incoming telecentric. Principles of nonlinear optimization, optimization in optical design. Lens design opti 517 syllabus university of arizona. Learn what telecentric lenses are and how to create highaccuracy telecentric lenses for. The software described in this manual is furnished under a license agreement and may be used or. 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. 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. Correction i symmetry principle, lens bending, correcting spherical aberration, coma, stop position, astigmatism, field flattening, chromatical correction, retrofocus and telephoto setup, design method 11. Explore design principles such as bending, symmetry, stop shift, and lens splitting.
Finally, according to design index of the lcos miniprojection lens, a u. For this there will be a significant amount of practical lens design homework. Shims follow the same basic concepts as spacers, but are used for fixed magnification lenses such as telecentric lenses. This is accomplished by ensuring that the system stop is located at the front focal point of the lens system. Uv dual telecentric lens with working wavelength of 240nm320nm, working distance of 98. Click on the icons in the table below to see performance graphs for the telecentric lens. Tutorial of telecentric lens university of arizona. Optical design of a new folding scanning system in mems. 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. Creating highaccuracy telecentric lenses for machine vision systems machine vision is the technology and process by which machines automatically inspect and analyze.
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. Plasma imaging optics gunner eye piece for battle tank. 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. When only first two terms exist, which is the case in our design, the period number of the diffractive surface n is given by 52.
If you optimize with a planoconvex lens with the stop in front of the lens zemax will give you the rear. Optical design and calculations were performed using zemax ee 64bit ver. Standard telecentric lenses accept ray cones whose axis is parallel to the main optical axis. The company has incorporated them into telecentric lenses and cameras with narrow band filters andor image diameter reduction. 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.
Solution of exercises lecture optical design with zemax. Leading optical product design software for engineering. The mml or machine micro lens product line showcases a wide selection of high end compact, fixed magnification telecentric lenses. The custom design of a telecentric lens requires the use of ray tracing software. Therefore, if you design a telecentric lens system with it, you will get a perfect telecentric system. Zemax delivers design software, training, and support services that set the highest standards for the optical and illumination industries. In order to achieve a telecentric lens design, all.
Cooke triplet and as telecentric lens double gauss and derivatives tessar lens tolerancing. Software codev, radiant zemax optics studio, oslo, synopsys, optalix must get on board asap. Imaging fundamentals of fourier optics, physical optical image formation, imaging in zemax 12 04. Optical design and custom lens manufacturing services theia technologies offers optical engineering design services along with highend lens manufacturing. 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. In addition, it used cots lenses for the themis allsky imager, a joint.
Object space and image space are the two types of telecentricity. Lens design with computational software like zemax and codev are the norm now. By providing your key serial number in this form, upon receipt of your information, your organizations license administrator will. These refer to the exit and entrance pupil locations of an optical system. 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. Selection of a telecentric lens is straightforward. 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. 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. This attribute is ideal for many machine vision measurement applications, as measurements of an objects dimension will be independent of where it is located. Image space telecentric lenses have their exit pupil located at infinity. Furthermore, telecentric lenses are more scale preserving when the workpiece is defocussed. We work with zemax and essential macleod simulationoptimization software. Lens spacers, shims and focal length extenders edmund optics. In january 2017 alone, at least 17 zoom lens patents were issued.
A telecentric lens is a compound lens that has its entrance or exit pupil at infinity. The designed ftheta lens is compact with the simple structure and large working area. With its powerful psd algorithm, synopsys can do in one second a. Beginning with the initial structure, the final optimized ftheta is achieved with zemax optical design software. Popular optical design programs include zemax, code v, fred, and trace pro. Synopsys is one of the largest and most powerful lens design programs in the world, with features found nowhere else. Sign in access to the myzemax customer portal is by invitation only. 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. More info on zemax get to a qualified design faster. Telecentric lenses tutorial resources opto engineering. Optimal lens design and use in laserscanning microscopy. Courses zemax opticstudio wavelength optoelectronic. Such telecentric lenses are designed with the chief rays collimated and.
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