Conversion Table – Density to Percent Transmission Density – % Transmission (Opacity x % Transmission = 100) Density Opacity %T 0 1.0 100 0.1 1.3 80 0.2 1.6 63 0.3 2.0 50 0.4 2.5 40 0.5 3.2 32 0.6 4.0 25 0.7 5.0 20 0.8 6.3 16 0.9 8.0 13 1.0 10.0 10 1.1 13 8.0 1.2 16 6.3 1.3 20 5.0 1.4 25 4.0 1.5 32 3.2 1.6 40 2.5 1.7 50 2.0...Read full articleRelated content from Photonics MediaPHOTONICS HANDBOOK ARTICLESPhysical Constants & Conversion FactorsPhysical Constants & Conversion Factors Length [I] 1 meter (m) = 39.3700 in. = 3.280833 ft = 1.093611 yd 1 kilometer (km) = 0.6213711 mi = 0.53996 nautical mi 1 micron (µm) =...Photonics HandbookPhotometric UnitsPhotometric Units SI Units Quantity Unit Luminous flux lumen lm Luminous intensity candela cd Luminance cd/m2 Illuminance lm/m2 lx Non-SI Units Luminous Intensity ...Photonics HandbookGreek AlphabetTable of the Greek alphabet and what the letters are commonly used to designate. Name Capital Small Commonly Used to Designate Alpha A α Angles, coefficients, attenuation...Photonics HandbookChemical Symbols for the ElementsChart of the first 103 chemical symbols for the elements. Chemical Symbols for the Elements Ac Actinium Cr Chromium In Indium P Phosphorous Sn Tin Ag Silver Cs Cesium Ir Iridium Pa ...Photonics HandbookWEBINARSOptical-Based Surface Metrology for CMP Optimization and Die Flatness ControlIntegrated circuit (IC) manufacturing already requires the use of advanced technology nodes down to 5 nm, and has roadmap plans requiring 2 nm for production within the next couple of years. The...Photonics.com 11/17/2020Solving Challenges in Defect Inspection of Advanced OpticsOptical components such as lenses, mirrors, prisms, and windows undergo tight quality control to deliver optimal optical transfer function. Any scratch, dig, chip pinhole, or other defect will...Photonics.com 9/23/2019Developments in Optics and Optical ComponentsFree Webinar Additional Questions & Answers from the Webinar below: Speakers: Dr. Robert R. McLeod Associate Professor and Graduate Director Electrical, Computer and Energy...Photonics.com 5/29/2013Adaptive Optics for MicroscopyUpdate: Additional Questions from the Webinar Answered below. Enabling Structured Illumination Microscopy in Thick Tissue with Adaptive Optics Peter Kner University of Georgia ...Photonics.com 10/23/2013PHOTONICS DICTIONARY TERMSneutral density coatingA coating applied to a neutral density glass that is designed to reduce the amount of light evenly across the transmitted light spectrum with no color distortion. These coatings are designed to...EDU.photonics.com 9/8/2009blue noiseNoise over a specified frequency range, in which the spectral density is proportional to the frequency instead of being independent of it, as in white noise.EDU.photonics.com 9/8/2009hard elasticsHigh-modulus elastic fibers that exhibit the following differences from conventional elastic fibers: Increasing temperature decreases recovery force (the fibers are enthalpic vs. conventionally...EDU.photonics.com 9/8/2009optical densityA measure of the transmittance through an optical medium. Optical density equals the log to the base 10 of the reciprocal of the transmittance. where tl is transmittance. In spectroscopy, optical...EDU.photonics.com 6/6/2018PHOTONICS BUYERS' GUIDE CATEGORIESMicrodensitometersA microdensitometer is an instrument for the precise measurement of density (transmission) over a small area on a piece of exposed film.Mathematical SoftwareDensitometersA densitometer is a device used to measure the optical density of a material.MicrophotometersCOMPANIESGlass Fab Inc.A History of Quality Since 1974 Glass Fab Inc. has met customers' stringent specifications by providing fabricated parts made of optical glass, filter glass, fused quartz and fused silica, low...Photonics Buyers' GuideReynard CorporationReynard Corporation has been a premier supplier of custom optics and thin-film coatings to a global customer base since 1984. Reynard focuses on manufacturing the highest quality products with...Photonics Buyers' GuideAndover CorporationWith over 40 years of experience, Andover Corporation is a recognized world leader in the manufacture of high-quality optical coatings and optical filters. We have an extensive line of...Photonics Buyers' GuideNational Photocolor Corp.National Photocolor is a manufacturer of off-the-shelf and custom pellicles. We offer a broad selection of pellicle beamsplitters, filters and windows for UV to IR applications. Many custom type...Photonics Buyers' Guide
