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