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~{EN}US Pocket Catalog Optical Filter Glass 2020 Advanced Optics SCHOTT North America, Inc. 400 York Avenue Duryea, PA 18642 USA Phone +1 570/457-7485 Optical Filter [email protected] Glass www.us.schott.com/ advanced_optics 2020 10431 ENGLISH/US 01/2020 kn/schmidt Printed in Germany SCHOTT Optical Filter Glass 2020 Optical Filter Glass 2 SCHOTT is a leading international technology group in the areas of specialty glass and glass- ceramics. With more than 130 years of outstanding development, materials and technology expertise we offer a broad portfolio of high-quality products and intelligent solutions that contribute to our customers’ success. SCHOTT Advanced Optics, with its deep technological expertise, is a valuable partner for its customers in developing products and customized solutions for applications in optics, lithography, astronomy, opto-electronics, life sciences, and research. With a product portfolio of more than 120 optical glasses, special materials and components, we master the value chain: from customized glass development to high-precision optical product finishing and metrology. SCHOTT: Your Partner for Excellence in Optics. 3 4 Contents Part I · Optical Filter Glass – Description 3 Optical properties ......................................18 3.1 Refractive index .......................................... 18 3.2 Reflection loss at the glass-air interface ................ 18 Foreword ......................................................... 8 3.3 Transmittance and internal transmittance ............. 19 3.4 Derived optical filter data ...............................21 Webshop ........................................................10 3.5 Internal transmittance graphs ..........................22 3.6 Spectral characterization of optical filters .............24 1 Introduction ............................................. 12 3.7 Dependence of spectral transmission on 1.1 General information on listed data ..................... 12 temperature ..............................................32 1.2 Environmental aspects, hazardous substances, 3.8 Luminescence / fluorescence ............................32 RoHS, ISO, REACh ........................................ 13 3.9 Color ....................................................... 33 1.3 SCHOTT optical filter glass: product portfolio ........ 13 3.10 Brightness / photopic transmittance ....................35 1.4 Positive list ................................................ 14 4 Thermal and mechanical properties .................36 2 Nomenclature and classification of 4.1 Mechanical density ρ [g/cm3] ...........................36 optical filter glass ....................................... 15 4.2 Knoop hardness ..........................................36 2.1 Group names ............................................. 15 4.3 Strength ...................................................36 2.2 Classification by material ................................ 16 4.4 Thermal toughening ..................................... 37 4.5 Transformation temperature Tg [°C] ...................38 4.6 Thermal expansion α [10 −6/K] ..........................38 CONTENTS 5 5 Chemical properties ....................................39 Part II · Optical Filter Glass – Properties 5.1 Stain resistance ...........................................39 5.2 Acid resistance ...........................................40 5.3 Alkali resistance ........................................... 41 1 Optical filter glass: product line ........................52 5.4 Identification of visible surface changes ...............42 5.5 Resistance against humidity .............................42 2 Optical filter glass: guaranteed values .................55 5.6 Solarization effects ....................................... 43 3 Optical filter glass: references values ..................61 6 Internal quality ..........................................45 6.1 Bubbles and inclusions ..................................45 4 Internal transmittance graphs ..........................66 6.2 Striae ......................................................45 6.3 Homogeneity of refractive index ....................... 47 5 Tolerances for polished filters ...........................77 Dimensions ..................................................78 7 Further processing of optical filter glass ............48 Polished surfaces ............................................79 7.1 Polished optical filters ...................................48 Optical quality ..............................................79 7.2 Coatings ...................................................49 6 7 Optical Filter Glass Part I – Description 8 Foreword SCHOTT Advanced Optics offers a wide range of optical filter • High transmittance glasses for any spectral solution to meet individual require- • High blocking ments and enable customized solutions. • Filter spectra with virtually no dependency on angle of incidence Optical filter glass is known for its selective absorption in • Superior quality, reliability, and durability certain wavelength ranges. The optical filter glasses appear • No polarization effects colored if their filter effect lies within the visible light spec- • Manufacture of complex glass types: high-quality surfaces, trum. For more than 100 years, filters from SCHOTT have extremely thin, small tolerances been known for their particularly high quality, purity, and • In-house optical and protection coating capabilities outstanding properties. • Ability to accommodate special requirements via close collaboration and development efforts between customers Currently, the SCHOTT Advanced Optics portfolio comprises and the SCHOTT application engineering team more than 60 different optical filter glass types, all produced • All colored filter glass types can be used as substrates for with great care using sophisticated industrial processes. The thin film coating in the manufacture of interference filters. glasses have the following advantages: Thus, specific advantages (absorption properties of a colored filter glass and the reflection properties of inter- ference coatings) can be combined into one optical filter. FOREWORD 9 SCHOTT’s optical filter glass portfolio is the product line If any information not covered in this catalog is needed, of choice for system designers and optical engineers and please contact a representative of our world wide sales team. is being constantly updated, reflecting market needs. While Our experts will consult you and help in finding a solution building on its capabilities, SCHOTT has also continuously for your needs, as we believe that close relationships with expanded its optical filter glass portfolio. Thus, it now con- customers is the key to success. tains the special bandpass filters UG2A, BG57, BG66, and BG67 for UV and visible applications. As we constantly strive to improve our products to your ad- vantage through innovation and new technical developments, SCHOTT’s optical filters are described in two parts whereby we reserve the right to change the optical and non-optical “Part I – Description” gives information about the most data in our Optical Filter Glass catalog without prior notice. important criteria that pertain to the materials and charac- teristics of optical filters, and provides detailed technical This catalog was assembled with the utmost care. However, information on each glass. The “Part II – Properties” covers we assume no liability in the unlikely event that there are additional technical information. content or printing errors. The release of this catalog replaces all previous publications. January 2020 10 Welcome to our shop for optical materials us.shop.schott.com/advanced_optics > › › › Optical Glass Optical Filter Glass Special Materials Archi WEBSHOP 11 Convenient online ordering Manage all your orders • Benefit from additional online discounts • Track and manage all your online & offline orders • Real-time information on prices and • Download order related documents (invoice, product availability order confirmation, delivery note, test reports) • Extensive search- and filter options Visit Information and downloads shop.schott.com/advanced_optics i • Review all product specifications • Download of technical information, Check our online portfolio and all technical datasheets, catalogues information without needing to log in. • Access to the interactive Abbe and Online registration is necessary to see prices filter glass diagrams and filter glass and availability and to order. calculation tool If you are already a SCHOTT customer, just contact [email protected] or your Sales Manager responsible to get an online account. Archi 12 1 Introduction 1.1 General information on listed data quality. Chapter 7 cover topics such as further processing of optical filter glass and applications. All data listed in this catalog without tolerances are to be understood as reference values. Only those values listed in All of our filter datasheets and the filter calculation program chapter 2 in the “Properties” part, under “Limit values of τi ,” can be easily accessed at www.us.schott.com/advanced_optics, “Tolerances of NVIS filters,” “Tolerance ranges of τi ,” and including filter glasses that are produced on special request “Tolerances for longpass filters” are guaranteed values. The only. graphically depicted internal transmittance curves serve as an initial overview to assist you in finding the most suitable Unless otherwise indicated, all data is valid for a temperature filter type for your application. of 20 °C. Chapter 1 of this “Description” part contains
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