Spherical optics, aspheric lenses, prisms, imaging lenses, imaging and laser optics assemblies, and mechanics are just a few of our expertise. Today, most engineers use advanced software tools to simulate the properties of a material and their impact on optical performance. Get Answers. They ask “Can I use my existing lens design with the new glass material? Soda–lime glass is divided technically into glass used for windows, called flat glass, and glass for containers, called container glass. It is used for instance in infrared glass radiators, heaters and radiant heaters. When reviewing a glass property sheet and designing a part, it’s important to know if the industry specifications you’re trying to meet are for external transmission or internal transmittance. (PDF 1.12MB), Contact : Catalogs : Company : Discount Programs, Copyright year, Edmund Optics Inc., 101 East Gloucester Pike, Barrington, NJ 08007-1380 USA, California Consumer Privacy Act (CCPA): Do Not Sell My Information, http://www.edmundoptics.com/knowledge-center/application-notes/optics/optical-glass/. Why is absorbance calculated as $\log_{10}(1/R)$ and not $1-R$? Polycarbonate. The color of a glass is determined by the wavelengths that the glass absorbs and transmits. For greenhouses special heat absorbing glas may be used. in Engineering Science and Mechanics and a B.S. It is defined as. Many glass manufacturers offer the same material characteristics under different trade names and most have modified their products and processes to be ECO-friendly (free of lead and arsenic). The two types differ in the application, production method (float process for windows, blowing and pressing for containers), and chemical composition. For optical glass, they provide the excellent transmittance (visible wave) range about 400-800 nm. Though apparently hardened, soda–lime glass can nonetheless be annealed to remove internal stresses with about 15 minutes at 1014 poises, near 500 °C. The following table lists some physical properties of soda–lime glasses. Optical systems have to be optimized for a total set of functional characteristics. Thanks to this precision transmission of infrared radiation this glass-ceramic shines across all ranges of optical transmission. Even a small change in the refractive index can affect the candela distribution of the transmitted light. We also use third-party cookies that help us analyze and understand how you use this website. The same information is provided by both of these terms but transmission is reported with ranges from 0 % to 100 % and transmittance from 0 to 1. But either way, the result (i.e. 5. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. Geometrical and color induced aberrations can be compensated only by the use of more than one glass type. "The Pyrex Glass Controversy That Just Won't Die", "Borosilicate Glass vs. Flat glass has a higher magnesium oxide and sodium oxide content than container glass, and a lower silica, calcium oxide, and aluminium oxide content. The absorbance of a glass, shown in the figure above as a function of wavelength, is often used to describe the decrease in intensity of light as it travels through the glass. Request a quote for BOROFLOAT® Please consider the "notes on specifications" Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. The refractive index for optical glasses, nd, is specified at a wavelength of 587.6nm (Helium d-line). The curve above shows the typical optical transmission of our UV-grade quartz glass at 10,0 mm glass thickness for wavelengths from 160 - 5000 nm. So a wide range of glass types has been developed. Another deviation is the SK and SSK glass types: SK ("heavy crown") and SSK ("heaviest crown"). *10-6/°C **Sapphire is a birefringent material. Crown glasses tend to have lower dispersion than flints. Depicted is solar transmittance through glas. Colored LEDs have narrow wavelength bands of emitted light which must be considered when designing for specific application wavelengths.