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