Example of increasing graphic sophistication, from a simple crosssectional line plot to a 3d wireframe to a 3d solid model in modern lens design software. Finally, the concurrent advancements in software pave the way for a future in which. This is accomplished by ensuring that the system stop is located at the front focal point of the lens system. Jun 25, 2015 optical systems in modern microscopy equipment can be subject to a variety of hidden errors.
Leading optical product design software for engineering. Creating highaccuracy telecentric lenses for machine vision. The company has incorporated them into telecentric lenses and cameras with narrow band filters andor image diameter reduction. 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. This actually refers to telecentric lens design, meaning optics that are designed in such a way that the light rays will hit the sensor more directly without too much straying offa design that. While entocentric lenses accept a diverging cone of rays i. Using telecentric optical systems to optimize industrial image. The optical design of telecentric optical systems is not a well known or published area of the optical design field. A key component of a machine vision system is its telecentric lens, which offers the best possible vision for the machine. Taking advantage of cuttingedge optical design expertise, moritexs highperformance machine vision lenses ensure accurate imaging performance for machine vision systems used in assembly and inspection processes on manufacturing lines. This actually refers to telecentric lens design, meaning optics that are designed in such a. In a telecentric optical system, the chief rays are parallel to the optical axis. Video telecentric lenses navitar optical solutions.
A method is presented for the calculation of paraxial design parameters of a doublesided telecentric zoom lens with easy variation of the magnification range. As a result, the aperture becomes greater as the magni. Telecentric lenses tutorial resources opto engineering. 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. A key component of a machine vision system is its telecentric lens. Object space and image space are the two types of telecentricity. The following is a representative sample of systems we have developed. Optical systems in modern microscopy equipment can be subject to a variety of hidden errors. We report an optical coherence tomography oct scanner design with optimized quasi telecentric optics. Learn what telecentric lenses are and how to create highaccuracy telecentric lenses for machine vision systems. Contrast optimization significantly reduces the amount of time it takes to design optical products with mtf specifications. The scale ratio is determined by the lens design ata fixed flangetosensor distance cmount as standard. What are some open sourcefree optical design software.
Fixedmagnification lenses are developed to be compact,outstanding costperformance ratio models with lens design of nontelecentric optical system. This actually refers to telecentric lens design, meaning optics that are designed in such a way that the light rays will hit the sensor more. In choosing a telecentric lens for a particular machinevision application, system integrators must understand both the terminology used by individual manufacturers and the operational principles behind each lens design. In many cases, the selection of tolerances is determined by experience, as well as by outputs from optical design software. Careful consideration of the optical design used in the equipment is critical. Using telecentric optical systems to optimize forensic. A lens which is object space telecentric, with the entrance pupil projected to imageside infinity. The synopsys optical solutions group osg, formerly optical research associates ora, has been providing worldclass support to our code v customers for over 40years. In an optical design, object space telecentricity is. Telecentric lens, telecentric optics, telecentric optical. Which coefficients should i use to model the optical ray tracing. Telecentric lenses make precise measurements vision.
Navitar designs, develops and manufactures innovative optical solutions for clients and enterprises across the globe. The telecentric lenses are mainly used for precision measurement. Magnification and wd could be accommodated to your individual needs by using an optional closedup ring adapter. Rolland, telecentric broadband objective lenses for optical coherence tomography oct in the context of low uncertainty metrology of freeform optical components. This section discusses the unique performance characteristics of telecentric lenses and how telecentricity can. Using telecentric optical systems to optimize forensic image. This optical design makes the image surface more symmetrical, which can be used for the precision measurement of the software.
Creating highaccuracy telecentric lenses for machine vision systems. Introduction to telecentric lenses and the advantages they bring to machine. Generally, telecentric lenses are supplied as objectspace, imagespace, or doubly or bi telecentric designs see fig. Optical and mechanical services our approach and expertise. With its powerful psd algorithm, synopsys can do in one second a job that takes other programs more than an hour. We work with zemax and essential macleod simulationoptimization software. Generally, telecentric lenses are supplied as objectspace, imagespace, or doubly or bitelecentric designs see fig. Leading optical product design software for engineering teams. Our engineering team consists of optical, mechanical, quality, electrical, process and application engineers with expertise in a wide range of imaging applications and technologies and skilled in the design of complex, high resolution, diffraction limited, innovative optical assemblies. Gholographic company has extensive experience with nearly every kind of optical system, including instrumentation, astronomical, illumination, nightvision, infrared, eyepieces, architectural lighting, automotive, medical, solar industry and more. Full technical specifications and reports are available, volume integration is supported by a generous discount structure, and our entire sales and applications engineering staff are knowledgeable about the products and the applications they are suited for.
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. Solutions include complete optomechanical and optoelectronic assembly and subassembly systems. Search by manufacturer, year, focal length, fstop, zoom, and fieldofviewusing terms like fisheye, wide angle, telephoto, reverse telephoto, and retrofocus. Optical design and specification of telecentric optical. The property of telecentricity will be defined and the use of telecentric optical systems will be discussed. 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. Design and assembly of a telecentric zoom lens for the.
To design a telecentric zoom lens, says harvey, you need to move the frontend optics in the case of an objectspace telecentric lens and the stop inbetween the front and rear lenses. Design of a hybrid diffractiverefractive achromatized. The distance between the object and the edge of the lens mount at which the image is sharpest. We report an optical coherence tomography oct scanner design with optimized quasitelecentric optics. Jan 11, 2019 creating highaccuracy telecentric lenses for machine vision systems machine vision is the technology and process by which machines automatically inspect and analyze. This scanner achieves a uniform, gaussian spot size of 15microm 1e2 diameter over a range of 4. Please let us know if you experience any problems using this calculator.
Abstract we report an optical coherence tomography oct scanner design with optimized quasitelecentric optics. Jenmetar telecentric measurement lenses jenoptik usa. Advancements in telecentric technology features vision spectra. Currently our megapixel telecentric lens can support up to 5. Tutorial of telecentric lens university of arizona. We have succeeded in achieving high performance at reasonable prices. Lighttools system and component design for nonsequential nonimaging designs such as projector collimators and led light shapers. The design and fabrication of telecentric lens with large. Trace pro, oslo, optiwave design consultancy optical software. In order to achieve a telecentric lens design, all of the chief rays rays from an offaxis point that pass through the center of the aperture stop. Frequently asked questions about optics design optics for hire. Dec 31, 2019 optical engineers can find patents on lens manufacturer websites and hobbyist sitesand places such as the canon camera museum.
Bi telecentric technology 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. Matlab sometimes optical problems require some math intensive modeling. We push each telecentric lens through a series of careful quality control tests and. The simplest way to make a lens telecentric is to put the. The ability to quickly perform repeatable, high accuracy measurements is critical to maximize the performance of many machine vision systems. We have set new standards in bitelecentric technology by constantly improving optical performances, quality control procedures and the ease of use of telecentric lenses. Using telecentric optical systems to optimize industrial. This paper is intended as a partial remedy for these deficiencies. 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. 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. Using microscopes with telecentric optical systems reduces or eliminates many of these errors to optimize image quality, measurement accuracy and reproducibility. The custom design of a telecentric lens requires the use of ray tracing software.
Telecentric lenses are designed to have a constant magnification regardless of the objects distance or location in the field of view. Optical design and specification of telecentric optical systems. These refer to the exit and entrance pupil locations of an optical system. Optical and mechanical design, verification and matching test results. Quasitelecentric optical design of a microscopecompatible. 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 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. With its powerful psd algorithm, synopsys can do in one second a. Aug 20, 2012 a method is presented for the calculation of paraxial design parameters of a doublesided telecentric zoom lens with easy variation of the magnification range.
This telecentric lens calculator is specific to the cabr123 basler ace aca160020um camera with sony icx274al sensor having 4. This attribute is ideal for many machine vision measurement applications, as measurements of an objects dimension will be independent of where it is located. This approach naturally leads to much better optical benchmarks such as telecentricity, resolution and distortion compared to other. The design of a telecentric lens is such that similar objects at.
Thorlabs has collaborated with navitar to design and manufacture a line of telecentric lenses for machine vision applications. A telecentric lens is a compound lens that has its entrance or exit pupil at infinity. For telecentric lenses this is generally the middle of the useful object distance described by the telecentric range. I havent had the chance to test all of them, so youre going to have to try the free ones out for yourself and see what works best for your needs. This scanner achieves a uniform, gaussian spot size of 15. For such systems, a telecentric lens allows the highest possible accuracy to be obtained. Optical design and custom lens manufacturing services theia technologies offers optical engineering design services along with highend lens manufacturing. Aug 22, 2005 model simulation using optical design software agrees with measurements by beam analyzer. Synopsys is one of the largest and most powerful lens design programs in the world, with features found nowhere else. The difficult part of this is that, to maintain the telecentricity of the system, the stop and the optics move at different rates. Creating highaccuracy telecentric lenses for machine. With bitelecentric lenses, the magnification in both image and object space is independent of distance within the depth of field or the position in the field of view. Therefore, if you design a telecentric lens system with it, you will get a perfect.
In order to achieve a telecentric lens design, all. Easily calculate telecentric magnification and field of view. Concluded that contributions from optical surfaces and the dome interior structures dominate the. Various printers, plotters, facsimiles and other equipment that employ a laser beam are known. Code v capabilities matrix synopsys optical solutions. However, the oslo user interface does contain several unique features that make it an efficient and easy touse optical design program, and you can enhance your productivity by reading through this chapter. In order to achieve a telecentric lens design, all of the chief rays rays from an off axis point that pass through the center of the aperture stop. Developed a fully configurable optomechanical system model for raytrace analysis. Jul 17, 2015 optical systems in modern microscopy equipment can be subject to a variety of hidden errors.
The importance of modulation transfer function in telecentric lens design. Design examples photon engineering optical software. Depending on requirements such as wavelength range, field of view, and resolution, a telecentric design will differ in the quantity, size, and material used. However, careful consideration of a microscopes optical design can. Model simulation using optical design software agrees with measurements by beam analyzer. Bitelecentric lenses tutorial in recent years the use of machine vision technologies in dimensional measurement applications has become very popular. The telecentric lens can provide with superior image quality, and the distortion is smaller than the traditional fixed focal lens. Zemax system and lens design for sequential systems such as camera lenses. Design examples photon engineering has partnered with clients on hundreds of successful consulting projects ranging from an observatory spectrometer to a human tissue scanner. Also, some recent advanced product of telecentric lens or systems in optical field are provided. Identification and characterization of optomechanical system stray light. Quasitelecentric optical design of a microscopecompatible oct scanner. Advancements in telecentric technology features vision.
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