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A point diffraction interferometer (PDI) [1] [2] [3] is a type of common-path interferometer. Unlike an amplitude-splitting interferometer , such as a Michelson interferometer , which separates out an unaberrated beam and interferes this with the test beam, a common-path interferometer generates its own reference beam.
Another common-path interferometer useful in lens testing and fluid flow diagnostics is the point diffraction interferometer (PDI), invented by Linnik in 1933. [11] [12] The reference beam is generated by diffraction from a small pinhole, about half the diameter of the Airy disk, in a semitransparent plate. Fig. 1 illustrates an aberrated ...
Pacific Data Images (PDI) was an American computer animation and visual effects production company based in Redwood City, California, that was bought by DreamWorks SKG in 2000. It was renamed PDI/DreamWorks and was owned by DreamWorks Animation .
Protein disulfide-isomerase has two catalytic thioredoxin-like domains (active sites), each containing the canonical CGHC motif, and two non catalytic domains. [4] [5] [6] This structure is similar to the structure of enzymes responsible for oxidative folding in the intermembrane space of the mitochondria; an example of this is mitochondrial IMS import and assembly (Mia40), which has 2 ...
The Plumbing & Drainage Institute (PDI) is an association of American manufacturers of engineered plumbing drainage specialty products. Such products include floor drains, roof drains, sanitary floor drains, cleanouts, water hammer arresters, swimming pool drains, backwater valves, grease interceptors, fixture supports, and other drainage ...
The .pdi footprint is typically 100 to 1000 times smaller than the footprint normally found in structured data files or database systems, and is rendered without any loss of detail. The word portable in the name derives from the idea that the smaller footprint allows a .pdi runs in the main memory of a user's’ computer without disk or network ...
The Protein Dispersibility Index (PDI) is a means of comparing the solubility of a protein in water, and is widely used in the soybean product industry.. A sample of the soybeans are ground, mixed with a specific quantity of water, and the two are then blended together at a specific rpm for a specific time.
Investigations Police of Chile (Spanish: Policia de Investigaciones de Chile); Party for Justice and Integration (Albanian: Partia për Drejtësi dhe Integrim), an Albanian political party