![]() The polarization of incident light bypassing the object and incident on a background is changed. ![]() A frontal surface of the object reflects the incident light to an observation station. The object is frontally illuminated by light of a first polarization. High contrast silhouette images of a substantially opaque object are obtained using front illumination techniques. Electric lighting manufacturers, designers, and researchers can use the tool to evaluate the impact of glazing units and other optical materials on the color quality and biological potential of transmitted light. ![]() Glass, window, and skylight manufacturers can employ the tool to optimize glazing spectral transmission to achieve intentional colorimetric and photobiological performance with transmitted light. The tool computes the transmitted SPD, then determines colorimetric and photobiological outputs using the transmitted SPD as the test source. The user creates a unit with one, two, or three panes of glazing or other optical materials, and the tool calculates the composite spectral transmittance accounting for reflections between materials. The tool allows a user to populate a database with more » spectral data for glazing or other optical materials, comprising spectral transmission and the spectral reflectance of both sides. The user selects a pre-transmittance spectral power distribution (SPD), such as for a CIE D-Series Illuminant, Planckian radiation, electric lamp, or measurement of daylight at a building site. The IES TM-30 framework and Excel computation tool were adapted to evaluate color quality, with measures from CIE S 026, UL 24480, and the WELL Building Standard v2 added to evaluate biological potential. Once the approximate melting point is known, a more appropriate plateau can be set, and a slower ramp rate used.Here we describe a framework and provides a computational tool to characterize the color quality and biological potential of light that is transmitted through glass and other optical materials. During this whole process it is important to: ensure that there is no sample on the outside of the tube before inserting it into the melting point apparatus use a sample only once as some substances chemically decompose on heating heat the sample slowly at 1-2✬/minute and perform a rapid melt with a ramp of up to 20✬/minute if the melting point is unknown. The average of the results from the three capillaries can then be reported as the melting point of the sample. For accurate melting point determinations, it is recommended that three samples of the same material are prepared in the same way and analyzed at the same time. When using the Stuart® SMP50 Automatic Digital Melting Point Apparatus it is important to prepare samples correctly. Furthermore, there is a storage compartment for unused capillaries, which includes a glass cutter to open capillaries that are closed on both ends, and an area to hold three prepared sample capillaries safely away from the heat source.” You can take measurements, view results, save programs, set up user sign-ins, and download time-stamped videos and reports to a USB flash drive. Set-up is easy and intuitive due to the Android™ menu system. If you are unsure of the melt temperature, use the rapid ramp mode to take a fast scan of the full temperature range. Renaud Foret, Category Manager, explained some of the key attributes of this device: “The SMP50, conforms to US Pharmacopeia (USP) and GLP requirements, and can accurately identify the melting point with its’ advanced digital image processing capability. The Stuart® SMP50 Automatic Digital Melting Point Apparatus can analyze three samples simultaneously, which can be captured and displayed as a video image of the melt on a large 7” touchscreen display, either straight away or at a more convenient time. These tests are undertaken in capillary tubes. It is usual to carry out a melting point determination and check for consistency with at least a further two tests. They are often used to determine the temperature of the melting point of a substance. Melting point apparatus are used to determine sample melt and are used for applications in pharmaceutical labs, quality control, academia, chemistry and industrial labs, particularly for the purity checking of raw materials received and compounds produced.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |