Optical design and performance of f theta lenses for highpower and highprecision applications. Although zemax is easy to use, optical system design is a very broad area of engineering. Other readers will always be interested in your opinion of the books youve read. A lens design form can be a combination of positive optical power and negative optical power lens elements that share characteristics with each other. The tutorial shows stepbystep how to download free optical software, osloedu, and use it to analyse the optical performance of a concave. Standard fused silica f theta lenses are suitable for all highpowerlaser applications like welding, cleaning and structuring. Smith, and optical system design robert fischer, introduction to lens design. Pdf optical design and performance of ftheta lenses for high. While this lens design is optimized for oct imaging, it may also be used in a variety of laser scanning microscopy applications. F theta lenses are often employed in highperformance laser scanning systems. Is anyone familiar with this type of f theta lens and could you please give me some detail information about it. The results indicate the f theta lens can increase the quality of the drilling holes and amend the projection plane. 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.
Key specifications for this lens are listed to the right. Fthetaronar and focusronar lenses are engineered to meet. F theta lens and wideangle lenses added are beneficial to scanning angle expansion. Look above, beneath the words zemax optical studio model for spherical grin lens at the line which says commits, branch, releases, contributor. F theta lens is designed to provide a flat field on the image plane for scanning and engraving applications. Opticstudio is the leading software used by optical engineers throughout the design phase. 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. Here we present several simple lens designs of superior quality that fully make use of highna lowmagnification objectives, offering diffraction. Mouroulis mcdonald geometrical optics and optical design, oxford, 1997 3. As i described in a paper at the 2014international optical design conference, this class of optics is interesting be they are of a reasonable complexity that the designs are likely to be instructive, they offer a small range of design constraints because of the standardization of cmos imager sizes. In figure 5, a 0% intercept can be found for any of the wavelengths shown.
Zemax designs for l1, l2, and l3 were downloaded from the zemax lens catalog. By only specifying distortion at one point in the field, it is possible to misrepresent a nonzero distortion lens as having 0% distortion. This paper proposes a method utilizing the zemax to analyze the commercial f theta lens. Oct 05, 2011 introduction to zemax entry with the lens data editor. Opticstudio is the industry standard optical system design software. F theta lenses are the standard lenses for galvoscannerbased laser marking, engraving, and cutting systems. Or does a different diffraction behavior apply if one greatly changes the lens projection or has extreme distortion. Process micromaterials with high precision with our f theta lenses. By introducing a specific amount of barrel distortion in the lens, the image height of the f theta lens is proportional to the scanning angle. The designed f theta lens is compact with the simple structure and large working area. F theta lenses solve many of the problems associated with laser scanning. For example, compare us025491584, a 1947 design by the ludwig bertele, to us058779001, a 1997 nikon design. The bertele design places the reticle very close to the last glass element, whereas the nikon design allows for 8mm separation. 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.
It provides full glass highperformance lens, and different lenses meet the functions of a3, a4, barcode scanning. Proficiency with zemax does not guarantee success with modeling your optical system. Airspaced 3 or 4element designs transmission of 90% f theta condition accuracy of better than 0. Optical design of a new folding scanning system in mems. Scanning lenses f theta optical components scanning lenses product information cascade laser corp.
Thorlabs ftheta lenses consist of an airspaced 2 or 3element design and are. The f theta silverline lens 170355140 in the wavelengthrange of 355 nm. Tutorial of telecentric lens haosheng hu college of optical sciences university of arizona december 6, 2016 introduction. The ftheta silverline lens 170355140 in the wavelengthrange of 355 nm. 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 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. The book not only covers theory of lens design but the author also delves into the math using practical examples. Hence, the focal lens of the scanning system usually uses the f theta lens to solve this problem. These infinitycorrected tube lenses feature a telecentric design appropriate for both laser scanning and widefield imaging applications. The enabling key component, f theta lenses, is designed as micrometer focusing scanning lens. Labeling, markings or micro structuring down to the smallest detail. Detailed laser processing with ftheta lenses jenoptik. 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. The tip of the day is a useful tutorial f new users.
Designing a large fieldofview two photon microscope using optical. Qioptiq designs and manufactures photonic products. It is well known that many optical systems have distortions. 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. Telecentric f theta lenses require very large lens diameters for long scanning paths lens diameter approx.
Figure 2 shows these parameters for our fth1001064 f theta lens, where focal length is 100 mm and the maximum deflection angle is 28. F theta, telecentric f theta lens, ftheta objective lens. Kingslake lens design fundamentals, spie press, 2010 2. 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 f theta telecentric lens group and wideangle lens group are the two key components. Telecentric lens in space designed facilitates the adjustment of light path. With practical zemax examples joseph geary, are all great books, just to name a few. For example, out of the 15,100 us patent designs, the leading optical design database lensview optical. They are the planar, the tessar, the biogon, the distagon, and the hologon click on these links to download the original pdf files. A practical guide to lens design focuses on the very detailed practical process of lens design. Jan 20, 2006 the paper provides the new type construction of laser confocal microarray scanning and fluorescent detection system. Method of analyzing the singlet ftheta scan lens for laser. 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.
By using non uniform rational bspline nurbs curves for ftheta lens correction higher order spatial derivatives are analytic and continuous for. 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. It is applied to the flatbed scanner and high shot instrument equipment. Send mail to webmaster with questions or comments about this web site. 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.
We offer the ftheta objective lenses as a standard selection or can adapt them to meet your exact requirements. The lens is close to the diffraction limit and has small distortion, which meets the requirements of use. Lens design fundamentals rudolf kingslake, applied optics and optical design part 1 and part 2 a. Our laser scanning tube lenses with a wavelength range from 400 to 700 nm or 450 to 1100 nm can be paired with our sl50cls2 450 1100 nm scan lens to create a telecentric system. 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 f theta telecentric lens group and wideangle lens group are the two key components. 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.
Ftheta lens and wideangle lenses added are beneficial to scanning angle expansion. Thermal lens, which occurs at high power laser applications and leads to afocal shift, is also minimized. How are images formed in wide angle lenses optics for hire. Every step from setup specifications to finalizing the design for production is discussed in a straight forward, tangible way. Jan 21, 2015 i added other design types more out of curiosity. It first appeared in the first world war, in order to allow the tank to gain a wider field of view and to add the anamorphic lens. Now i want to use a concave mirror to form an image of an point object with a realsize, for example 10nm et al. For convenience, the optical models below implemented in zemax can be downloaded. 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. The design and the quality of the optical components play a key role in the lens performance.
Linos laser material processing optics brochure excelitas. Then, the initial structure parameters are determined by pw method. Laser spot size is guaranteed to be appropriate value at distance of about 100 m. 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. Optical design of a new folding scanning system in memsbased. Brian blandford 2005 6 opic lens design tutorial edu drawing the spherical. Tutorial of telecentric lens university of arizona. Pdf optical design and performance of ftheta lenses for. 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. Scanning lenses ftheta product information optical. Fisheye lens design prescriptions suitable for 35 mm photography are not commonly presented in lens design texts or databases. In its simplest form, a twophoton microscope consists of a scan. Zemax tutorial 1 lens data editor interface youtube.
Ftheta lenses shanghai optics custom optical lens design. Fisheye lens designs and their relative performance. With practical examples using zemaxr opticstudiotm on free shipping on qualified orders. This applies not only to ftheta lenses but also to lens systems which should. There will be some amount of distortion and curvature. These lenses are made with low dispersion fused silica with optical design to avoid back reflection and ghost image. However, when the full image circle is considered, it is obvious that the lens has nonzero distortion. Standard lenses focus the laser beam on a spherical surface in contrast to an ideal flat or plane field. Note that the installer will automatically scan your computer to verify the presence. If you continue to use our services, we will assume that you agree to the use of such cookies. New optical design method solves the problem of limited scanning angle.
The scanner exploits the functional advantages and the optical system has small spot size, great linearity and large depth of focus. Our ftheta lenses are used in various applications from industrial material processing e. Design examples of several widely used modern lenses are provided. 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.
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. Our f theta lenses for 1064 nm deliver high scan linearity and high power handling, generating a small and uniform spot throughout a flat image plane. The use of f theta lenses provides a plane focusing surface and almost constant spot size over the entire xy image plane or scan field. 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.
It was invented in 1927 by henry kratong in accordance with chinese magic mirror. Detailed laser processing with ftheta lenses jenoptik usa. Both designs have efl25mm and are about f 3 and have an eye relief of about 18mm. The lsm03vis scan lens is designed and ar coated for imaging over the visible wavelength range 400 to 700 nm. But all of these software packages share one critical flaw. Pdf ftheta lenses are widely used in remote laser processing. If you optimize with a planoconvex lens with the stop in behind the lens, zemax will give you the front meniscus form.
Nasse wrote a series of technical papers for carl zeiss detailing their modern lens history and genealogy. Nowadays, high accuracy and performance of critical to many machine vision system, a method that use telecentric lens allows highest possible accuracy to be obtained. Eksma optics uses cookies to give you the best shopping experience. There are also many useful figures to help visualize the main issuesconsiderations of lens design. In his three part series, he discussed 5 lens designed that changed the world. Osa optimal lens design and use in laserscanning microscopy. With practical examples using zemax r opticstudiotm on free shipping on qualified orders. The diffractionlimited, multipleelement, airspaced lens design is optimized for a flat field in the image plane and low f theta distortion. Standard fused silica ftheta lenses are suitable for all highpowerlaser applications like welding, cleaning and structuring. Dear user, your browser has javascript turned off or an installed extension for example, noscript is blocking the execution of javascript. F theta lenses are commonly used in laser scanning systems that require a flat image plane and high resolution. Optimal lens design and use in laserscanning microscopy. 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.
Equidistant projection f theta type of lens vs perspective projection f tantheta type of lens. For perfect camera lenses, does the same airy disc apply regardless of the lens projection mapping. Opticstudio, zemax, kirkland and then experimentally with. 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. 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. We also have a selection of galilean laser beam expanders, with up to 20x expansion ratio and low wavefront distortion, for use at wavelengths from the uv to nir in low and high energy applications. All are for folded zooms, which provide an interesting study. While ftheta lenses are well designed to provide a flat image plane, a real lens rarely measures up to the theoretical. If you want to download the lens data for the lens design forms so far, you can do that here. Zemax delivers design software, training, and support services that set the highest standards for the optical and illumination industries. Additionally, the compact design of the ftheta lens allows the user to reduce the number of optical components needed to provide a flat image plane. We offer the f theta objective lenses as a standard selection or can adapt them to meet your exact requirements. Beginning with the initial structure, the final optimized f theta is achieved with zemax optical design software. A comprehensive guide to camera lens design and zeiss.