Ftheta lenses are widely used in remote laser processing. Now i want to use a concave mirror to form an image of an point object with a realsize, for example 10nm et al. Although zemax is easy to use, optical system design is a very broad area of engineering. F theta lens and wideangle lenses added are beneficial to scanning angle expansion. Optical design and manufacturing expert shanghai optics. Beginning with the initial structure, the final optimized ftheta is achieved with zemax optical design software. All rmi optomechanical designs are created using zemax and solidworks software. Telecentric lens in space designed facilitates the adjustment of light path. Silverline ftheta objective lenses are highquality optics for use in laser material processing.
Designing the optimal fresnel lenses by using zemax software. Optimal lens design and use in laserscanning microscopy. They are fused silica objective lenses that offer minimal absorption for extremely powerful lasers. Aspheric singlet lens optimization by zemax simulation. Actually we were doing other wide angle system design. Qioptiq fairport, ny produces a software package that includes winlens 3d lensdesign and analysis software, tolerancer, glass manager a glass and optical materials database, and material editor to create custom optical materials. By only specifying distortion at one point in the field, it is possible to misrepresent a nonzero distortion lens as having 0% distortion. Osa optimal lens design and use in laserscanning microscopy. The diffractionlimited, multipleelement, airspaced lens design is optimized for a flat field in the image plane and low f theta distortion. This applies not only to ftheta lenses but also to lens systems which should be integrated into an optical setup.
In january 2017 alone, at least 17 zoom lens patents were issued. 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 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. Optical design of a new folding scanning system in memsbased. Paraxial optics, ideal lenses, optical systems, raytrace, zemax handling 2 22. The scanning mirror, which is located at the left of the image at the scan plane, directs the laser beam through the scan lens. This paper proposes a method utilizing the zemax to analyze the commercial f theta lens. See if you can eliminate an element or improve the performance in an all spherical design by using an asphere.
Aberrations that effect scan lens design, and their azimuthal angle, field. The results indicate the f theta lens can increase the quality of. To get around this problem, first download the files to your disk, then open them from zemax or windows explorer. In virtuallab fusion, we provide a scanning source for such scenarios, and with different field solvers used in connection, the performance of such scanning lens systems can be evaluated conveniently. Co2 ftheta lens are widely used in laser marking, engraving, drilling machines, etc. 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.
Nowadays, a large variety of scanning systems utilizing these devices are commercially available. Hence, the focal lens of the scanning system usually uses the f theta lens to solve this problem. Ftheta scan lens, beam expanders, ir lens, athermal lens, objective lens, prisms, photon counters, spectrometers, lens inspection system, optics software. Fisheye lens designs and their relative performance. Led by expert optical engineers, our handson courses teach the most useful optical design techniques. Other readers will always be interested in your opinion of the books youve read. 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.
But all of these software packages share one critical flaw. Fisheye lens designs and their relative performance james jay kumlera, martin bauerb. In figure 5, a 0% intercept can be found for any of the wavelengths shown. Scan lenses implemented in general laser scanning microscopy applications. Zebase 6 is a collection of over 600 sequential optical designs in opticstudio format on cd. Optical design and performance of f theta lenses for highpower and highprecision applications. Detailed laser processing with ftheta lenses jenoptik. Review of the two primary methods of image formation in lens design, perspective f tantheta projection also called rectilinear or orthoscopic and equidistant f theta projection also called equiangular. Scanning lenses 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.
Part of the lens design form is from the configuration, as it is important to be able to see the configuration of the lens and decipher what it means. The tip of the day is a useful tutorial f new users. The lsm03vis scan lens is designed and ar coated for imaging over the visible wavelength range 400 to 700 nm. These files show the performance of a lens without disclosing its design. When you select a company for optical design, it pays to work with someone who understands not only design but manufacturability. The ftheta silverline lens 170355140 in the wavelengthrange of 355 nm.
Zebase 6 includes a copy of milton laikins book, lens design. How are images formed in wide angle lenses optics for hire. 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. The thesis titled photographic fisheye lens design for 35mm format cameras. For opening you have to save the file in the folder zemaxblack box so that the program has access to the data. Bentley field guide to lens desifn, spie press, 2012. Our engineers use the right lens design process with the knowledge of manufacturing process and limitations and cost.
Shanghai optics is great in optical lens designs, but most important, we are an optical manufacturer. Benefit from our many years of experience in the development of optical systems for laser material processing. 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. For many applications in laser scanning and engraving, a planar imaging field is desired for the best results. Oslo is designed to work seamlessly with the companys illuminationsystem design software, tracepro. The scope of this subject is aimed in the field of. For instance would i apply the same airy disc psf regardless of if it was a 180 degree fisheye, an f theta, or f tan theta lens.
The design and the quality of the optical components play a key role in the lens performance. 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, f theta lens, optical system with vir, nwir, mwir, lwir, gaussian beam propagation, cell phone lens design, machine vision, mirror system design, telescope. A lens design form can be a combination of positive optical power and negative optical power lens elements that share characteristics with each other. With expertise in optical construction, mechanical housing, complex, multielement assemblies, and utilizing stateofthe art custom test setups, our dedicated optical engineers specialize in the following. Lens design, gives insight into the engineering problems of each lens design type and practical solutions that are expensive to discover independently. Gentle introduction to optical design and lens design.
Brian blandford 2005 6 opic lens design tutorial edu drawing the spherical. We offer the ftheta objective lenses as a standard selection or can adapt them to meet your exact requirements. Key specifications for this lens are listed to the right. New optical design method solves the problem of limited scanning angle. Qioptiq fairport, ny produces a software package that includes winlens 3d lens design and analysis software, tolerancer, glass manager a glass and optical materials database, and material editor to create custom optical materials. F theta lenses are the standard lenses for galvoscannerbased laser marking, engraving, and cutting systems. Scanning lenses ftheta product information optical. Method of analyzing the singlet ftheta scan lens for.
Only designs capable of greater than or equal to 180degree field of view are considered. Pdf optical design and performance of ftheta lenses for. Making one or more surfaces in an optical design aspheric is a common way to improve optical. The aims of this subject are to provide uptodate treatment of the optical design at an introductory level. Telecentric f theta lenses require very large lens diameters for long scanning paths lens diameter approx. If a perfect lens is idealized in a software as one surface, there.
This lens focuses a laser beam scanned with a scanner, etc. Finally the newly developed lenses were tested over 7501050 nm in a custom built twophoton laser scanning microscope using the recently. Scanning lenses f theta optical components scanning lenses product information cascade laser corp. The designed ftheta lens is compact with the simple structure and large working area. 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. The image to the right shows the proper spacing of the scan and tube lenses for laser scanning microscopy. 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. There are also many useful figures to help visualize the main issuesconsiderations of lens design. Optimization i basic principles, paraxial layout, thin lenses, transition to.
For many applications in laser scanning and engraving, a planar imaging field is. 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. The book not only covers theory of lens design but the author also delves into the math using practical examples. Airspaced 3 or 4element designs transmission of 90% f theta condition accuracy of better than 0. Using a singlet lens as an example, the articles walks you through the basic process of designing a lens, including building the system part 1, analyzing its performance part 2, and optimizing it for the required prescription and design constraints part 3. Zemax delivers design software, training, and support services that set the highest standards for the optical and illumination industries. Silverline ftheta objective lenses from jenoptik have been specially developed for applications that use highpower and shortpulse lasers.
The diffractionlimited, multipleelement, airspaced lens design is optimized for a flat field in the image plane and low ftheta distortion. We accidentally found this ftheta lens drawing and we are very interested in it. There are some graphical software tools that can really help in this stage, especially when pre design. Optical design of a new folding scanning system in mems. While this lens design is optimized for oct imaging, it may also be used in a variety of laser scanning microscopy applications. 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. For perfect camera lenses, does the same airy disc apply regardless of the lens projection mapping. F theta lenses are often employed in highperformance laser scanning systems. Arlington capital had acquired zemax in 2014, when it was spun off from radiant zemax. I did not have the zemax last week so i was not able to open the file. Here we present several simple lens designs of superior quality that fully make use of highna lowmagnification objectives, offering diffraction. Ftheta lens and wideangle lenses added are beneficial to scanning angle expansion. A telecentric f theta lens differs from a normal f theta lens in that the axis of the focused laser beam bundle is perpendicular to the scanning plane throughout. Or another similar opensource free software to analyze optics like lens aberrations, ray tracing and image.
Eqt mid market us gp eqt has acquired zemax software holdings kirkland, wa, a maker of optical and illumination design software, from arlington capital partners. In addition to these standard designs, we can develop complete systems for you, using components from laser beam shaping to the expansion and splitting of. Optics tutorial 2 lens and focusing basics youtube. 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 designed with a barrel distortion that yields a displacement that is linear with. We doesnt provide f theta lens design products or service, please contact them directly and verify their companies info carefully. However, when the full image circle is considered, it is obvious that the lens has nonzero distortion. The simplified system allowed distortion and no attempt was made to. Photonics singapore wavelength optoelectronic s pte ltd.
In order to create small and precise structures, the design. Or another similar opensource free software to analyze optics like. Ftheta lenses are the standard lenses for galvoscannerbased laser marking, engraving, and cutting systems. Then, the initial structure parameters are determined by pw method. These lenses are ideal for engraving and labeling systems, image transfer, and material processing. Oct 03, 2018 but all of these software packages share one critical flaw. The optical design of the new ftheta lens has been performed with the simulation software zemax. If you optimize with a planoconvex lens with the stop in behind the lens, zemax will give you the front meniscus form. 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. The flatfield scanning lens has optimized the wideangle and long focallength light path, it is widely applied in wide scan range situation. 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. Our broad selection of beam expansion systems and linos f theta lenses meets even the most stringent demands. Opticstudio is the leading software used by optical engineers throughout the design phase. Geary lens design with practical examples, willmannbell 6.
Our ftheta lenses are used in various applications from industrial material processing e. Apr 23, 2016 by using non uniform rational bspline nurbs curves for f theta lens correction higher order spatial derivatives are analytic and continuous for the smoothest possible corrected motion capability. F theta lenses solve many of the problems associated with laser scanning. Laser spot size is guaranteed to be appropriate value at distance of about 100 m. Equidistant projection f theta type of lens vs perspective projection f tantheta type of lens. Send mail to webmaster with questions or comments about this web site. It is used for high speed micro drilling of printed circuit boards, highspeed marking of electronic parts and resin parts, etc. Optical software maker zemax acquired by investment firm. Ftheta lenses have been engineered to provide the highest performance in laser scanning or engraving systems.
It is well known that many optical systems have distortions. Or does a different diffraction behavior apply if one greatly changes the lens projection or has extreme distortion. The adjacent plot shows departure from perfect linear ftheta mapping for each of the full field fisheye lenses. May 01, 2014 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. 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.
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