microlens array homogenizer

Alsharnoubi, J.; Sabbour, A.A.; Shoukry, A.I. https://doi.org/10.3390/mi11030338, Subscribe to receive issue release notifications and newsletters from MDPI journals, You can make submissions to other journals. official website and that any information you provide is encrypted 8600 Rockville Pike Fabrication of a diamond concave microlens array for laser beam Customized microlens arrays are INGENERICs daily business: From lens design, prototype manufacturing and small series production to mass production. PMC Opt Express. The light source is a PL201 compact laser module fixed in an AD11F SM1-threaded adapter. 3: 338. Objective Reproducible fabrication of refractive microlenses with parameters derived from system design calculations. The designed mask is a micropores array of random rectangular arrangement, as shown in, Subsequently, the chromium film, with a thickness of about 140 nm, was coated on the glass substrate, as shown in, Based on the fabricated honeycomb random microlens array (rMLA) and rectangular rMLA, an optical setup was constructed to test the uniformity of the homogenized light spots generated by the two types of rMLAs, as shown in, The rMLA was illuminated by a laser beam with a wavelength of 650 nm and diameter of 5 mm. This paper reports the results of developed microlens beam homogenizer for the 248nm excimer laser. This study aims to demonstrate the effectiveness of sets of microlens arrays to homogenize and finely shape focal spots, for optimizing optical pumps of interest for Yb-doped slabs in the field of high-power lasers, or for use in materials processing and industrial applications. These cookies can be used by advertising partners to track your use of our website according to their own policies, and can combine the corresponding information with other information, and then display relevant advertisements to you on our site and other sites. 2010 Jun 21;18(13):14251-61. doi: 10.1364/OE.18.014251. Meanwhile, energy efficiency depends on the number of phase levels of the DOE; the greater the number of phase levels is, the higher the energy efficiency will be, but also the more complex the fabrication. These homogenizers are composed of two polymethyl methacrylate (PMMA) microlens arrays (MLAs) and a positive focal length lens. Analytical model of microlens array system homogenizer For full-text searches on the whole website, use our search page. Customized freeform surfaces with highest precision on different wafer sizes (up to 300mm) are also available. A mathematical model of the single freeform surface design for collimated beam shaping. A randomly distributed freeform cylindrical microlens (RFCML) is proposed for laser beam reshaping and homogenization. HHS Vulnerability Disclosure, Help See further details. Fabrication of Random Microlens Array for Laser Beam Homogenization with High Efficiency. Generally, these cookies will only be set when you make a near service request behavior (for example, setting your privacy preferences, logging in, or filling out a form). This helps to benchmark a variety of experimental results. (This article belongs to the Special Issue. Avantier provides light pipes that can serve as beam homogenizers. When the high-coherence laser beam is homogenized by means of using the MLA, interference fringes will occur in the homogenized light spot due to the periodicity of the MLA, which seriously affects the uniformity of the homogenized light spot. Beam shaping system design using double freeform optical surfaces. The https:// ensures that you are connecting to the An SM1T1 coupler attaches the laser module to the input side of the FLE1 homogenizer. Jenoptik designs and manufactures high-precision. ; Meng, L.X. To learn more about how Zoom handles personal data, please visit our. You do not have subscription access to this journal. Precision Optical Components Unable to load your collection due to an error, Unable to load your delegates due to an error. Fully generic trends are evidenced in terms of the shaping capabilities, for highly efficient focusing, in the form either of a single spot or of multiple sub-spots. Visit our dedicated information section to learn more about MDPI. ; Kang, Y.D. are found in the RP Photonics Buyer's Guide. PDF Strategies for Beam Homogenizing - AMS Technologies Yin, Z.; Wang, Y.; Yin, S.; Qiang, J.; Yang, K. Homogenization system for laser diode stack beams based on double cylindrical lenses of slow axis direction. Would it be possible to get some graphs of the spatial profile of the output beam? Among these, a microlens array combined with a convex lens is one of the most commonly used homogenizers because of flexible integration and high uniformity. Alternatively, other light sources can be used such as a fiber-coupled LED connected to a collimator or mounted LED with a collimation adapter. and A.C.; Validation, H.P. The https:// ensures that you are connecting to the We use cookies on our website to ensure you get the best experience. Han, W.; Han, W.; Luo, C. Unreflecting acid etched glass. New applications such as semiconductor wafer annealing, The homogenization of light is widely applied in various industrial sectors. American Crystallographic Association, Inc. AVS: Science and Technology of Materials, Interfaces and Processing, Laser polishing of additive laser manufacturing surfaces, Femtosecond laser-induced periodic surface structures, Combination of topology and shape optimization with finite element modeling in the case of an aerospace component produced by laser based additive manufacturing, Simulated fabrication of off-axis microlens array using excimer laser dragging process, Microlens array fabrication by laser interference lithography for super-resolution surface nanopatterning, Sequential shrink photolithography for plastic microlens arrays, Strain responsive concave and convex microlens arrays. Fabrication of Random Microlens Array for Laser Beam Homogenization with High Efficiency. Micromachines. This allows us to achieve greater uniformity and higher fill factors than would otherwise be possible with other technologized, such as reflow technology. Homogenizers can handle a wide range of field geometries and beam shapes - top hat, rectangular, square and lines - typical full angle from 0.20 to 11.21 deg Homogeneity up to the technical limits (up to 1% non-uniformity) High NA, high fill factor and retention of polarization 2012 Apr 20;51(12):1843-52. doi: 10.1364/AO.51.001843. ; Software, W.L., L.L. Fabrication of Random Microlens Array for Laser Beam Homogenization with High Efficiency by Li Xue 1,2, Yingfei Pang 2, Wenjing Liu 1,2, Liwei Liu 2, Hui Pang 2, Axiu Cao 2,*, Lifang Shi 2,*, Yongqi Fu 1,* and Qiling Deng 2 1 University of Electronic Science and Technology of China, Chengdu 610054, China 2 Manufactured from fused silica, these light pipes achieve an approximate 35-40% increase in the output of light. The energy utilization rate of the homogenized light spots by the two types of rMLAs was about 90%. Paper should be a substantial original Article that involves several techniques or approaches, provides an outlook for We do this by working closely with you during the development process. 2000 Conference on Lasers and Electro-Optics Europe (Cat. Find support for a specific problem in the support section of our website. ; Writingoriginal draft, L.X. 2012 Mar 12;20(6):5922-35. doi: 10.1364/OE.20.005922. Pei, X.; Liang, Y.; Wang, F.; Zhu, X.; Xie, C. Beam homogenization of a fresnel lens array with a randomly distributed phase for laser beams. In contrast, the MLA is widely applied to the field of multi-wavelength laser beam homogenization to achieve the miniaturization and integration of the systems, due to its merits of a high energy utilization rate, extremely simple structure and high beam uniformity. Separate search groups with parentheses and Booleans. However, for laser beam homogenization with high coherence, the periodic lattice distribution in the homogenized spot will be generated due to the periodicity of the traditional MLA, which greatly reduces the uniformity of the homogenized spot. Several mounting options for the Fly's Eye Homogenizers are provided in the table below. As a new approach we apply chirped microlens arrays to the beam shaping system. Login to access Optica Member Subscription. The outputs of the FLE1(x) homogenizers are also externally SM1 threaded. Express 15(10) 6218-6231 (2007), Xiumin Gao, Qiufang Zhan, Jinsong Li, Song Hu, Jian Wang, and Songlin Zhuang Click here to learn more. But the intensity between the multiplied foci varies in general in one, Preface Editor Contributors Introduction Todd E. Lizotte and Fred M. Dickey Hitachi Via Mechanics (USA), Inc., Londonderry, New Hampshire and FMD Consulting, LLC, Springfield, Missouri, USA The, Keywords: flat panel displays ; compound eye ; microlenses ; micro-optics ; multi-aperture imaging ; optical images ; photolithography ; photoresists Reference EPFL-ARTICLE-183166 Record created on, By clicking accept or continuing to use the site, you agree to the terms outlined in our. -- Example: "gr?y" retrieves documents containing "grey" or "gray". This site needs JavaScript to work properly. Note that the input and output threads will rotate relative to each other when using the built-in output orientation adjustment. However, the homogenization of high-fluence laser beam is still a great challenge due to the serious damage to the microlens-array-based homogenizer. Both beamlets then pass through the condenser lens, converge, and overlap at the same location. 8600 Rockville Pike Such a beam homogenizer contains only one random freeform microlens array (rfMLA). Grnbein, M.L. Most spherical and aspherical microlens arrays are customized solutions, especially designed and manufactured for the individual needs of our customers. They are manufactured from high-quality materials, e.g., fused silica or CaF2. A beam homogenizer for digital micromirror device - ScienceDirect Study on laser beam homogenization in temperature sensor calibration. The profile of this beam spot is a square flat-top with dimensions of approximately 1717mm2. The inputs of all of the homogenizers feature external SM1 threads and internal SM05 threads. Overview Application Feedback The Fill Factor is a measure of the fraction of incident light reaching the detector. An official website of the United States government. We present a method to design microlens beam homogenizer according to the propagation properties of the irradiance profile. This research was supported by National Natural Science Foundation of China (Nos. Fused silica light pipe homogenizing rods are ideal for applications utilizing UV LED light sources. INGENERIC GmbH With its unique production technique, INGENERIC is able to keep the form accuracy of the arrays within the submicron range. Major applications for lens arrays with spherical or aspherical curvature are imaging and illumination as well as the effective collimation of laser light. The FLE2(x) Flys Eye Homogenizers can be used with a mounted LED and a collimation adapter to provide a uniform input into an Olympus, Zeiss, or Nikon microscope. Diffraction at the small lens apertures and interference effects of periodic arrays are explained by using diffraction theory. Editors Choice articles are based on recommendations by the scientific editors of MDPI journals from around the world. Grewell, D.; Benatar, A. Diffractive optics as beam-shaping elements for plastics laser welding. After the incident light was modulated by the rMLA, a homogenized light spot was able to be obtained. Other optomechanical and optical components, such as lens tubes, additional lenses, and filters, can be installed along the optical axis of each homogenizer using the threads at the input and output. Use these formats for best results: Smith or J Smith, Use a comma to separate multiple people: J Smith, RL Jones, Macarthur. Integrated Double-Sided Random Microlens Array Used for Laser Beam Homogenization. Fabrication of Multifocal Microlens Array by One Step Exposure Process. The size of the rectangular output can be controlled by the red ring on the device. Sapphire Concave Microlens Arrays for High-Fluence Pulsed Laser PDF Freeform microlens array homogenizer for excimer laser beam shaping HHS Vulnerability Disclosure, Help Alain Jolly, Guillaume Machinet, and Johan Boullet, "Sets of microlens arrays to finely shape homogenized focal spots," J. Opt. Homogenization basically involves optical integration in the Fourier plane of a large focusing lens, the input light . Opt. Moreover, to verify the effectiveness of our method, the designed freeform microlens array homogenizer has been fabricated and tested experimentally. and transmitted securely. Express 29(25) 40878-40890 (2021), Frank Wippermann, Uwe-D. Zeitner, Peter Dannberg, Andreas Bruer, and Stefan Sinzinger future research directions and describes possible research applications. 2021 Sep 11;12(9):1097. doi: 10.3390/mi12091097. 61605211, 61905251); The Instrument Development of Chinese Academy of Sciences (No. Due to the small. Shape the unstable laser beam using diffractive optical element array. Some "absolutely necessary cookies" may transfer personal data to the United States. Asterisk ( * ) -- Example: "elect*" retrieves documents containing "electron," "electronic," and "electricity", Question mark (?) A beam energy homogenizing method with total reflection beam Due to the periodic structure of regular arrays the output intensity distribution is modulated by equidistant sharp intensity peaks which are disturbing the homogeneity. The homogenized light spot with a high energy utilization is then obtained accordingly. As a new approach by applying freeform surface microlens array, the homogenizer can yield somehow superior beam shaping results with larger but less microlens units than conventional method. The .gov means its official. These cookie support websites provide enhanced and customized features. direct light with highest precision and efficiency, click here for the twitter channel Dear user, your browser has JavaScript turned off or an installed extension (for example, NoScript) is blocking the execution of Javascript. efficient transformation and homogenization monolithic structure highest transmission due to minimized transition zones typical facet of 400um long term stability Quality We operate a strict quality control policy. For Double microlens arrays (MLAs) in series can be used to divide and superpose laser beam so as to achieve a homogenized spot. We work to your specific requirements and, thanks to short production times and close cooperation, we can contribute to your success as early as the development phase. As far as they get accepted by the author, they will appear above this paragraph together with the authors answer. See also: beam shapers, laser beams, flat-top beams, optical intensity, diffractive optics, micro-optics. In the fabrication process, a clever method of combining chemical etching with lithography technology is performed to fabricate a honeycomb rMLA and a rectangular rMLA. Feature papers represent the most advanced research with significant potential for high impact in the field. The light passes through the fly's eye homogenizer to produce a rectangular 8.6mm x 12.0mm output on an EDU-VS1(/M) screen, as seen in the photo to the right. ; Formal analysis, L.X. Nevertheless, the DOE is generally only suitable for a single wavelength, and cannot be used to shape the beam in a broad spectral range. 1997 Sep 20;36(27):7080-5. doi: 10.1364/ao.36.007080. By continuing to use this site, you agree to our use of cookies. Lens arrays are fabricated by an all laser-based technology employing a precise femtosecond, Abstract. Outside the focal plane of the focusing lens the sharp edges of the homogenous area becomes blurry. and transmitted securely. 2017YFC0804900); Sichuan Science and Technology Program (No. 2006 Oct 30;14(22):10171-80. doi: 10.1364/oe.14.010171. Microlens arrays - Fraunhofer IOF The .gov means its official. Our advertising partners can set these cookies through our site. It is shown that, among other . By submitting the information, you give your consent to the potential publication of your inputs on our website according to our rules. The drawback of the refractive and diffuser type is that the uniformity on the homogenization plane is associated with the laser Gaussian beam profile . Get your entry! If you want to place a link to this article in some other resource (e.g. (See also our privacy declaration.) To adjust the orientation of the rectangular output, the back portion of the housing can be rotated while the front SM1- or SM2-threaded portion of the homogenizer is fixed (click here for details).
Goldilocks Locksmith Naperville, Articles M