. The Bell System technical journal . Fig. —Reflection of light from a single set of similarly oriented etch-pit facets, A,is like that from a single mirror, B. Reflection from all three sets of facets of a Z-cutsection will give a three-fold etch-figure on a screen, as in C. with regard to natural faces, which are of course produced by essentiallyopposite effects, , acid corrosion m the case of etch-pits, and growth fromsolution in the case of natural faces. Actually, many curved-facetsgive optical effects showing no discernible evidence of individual flat , the question
. The Bell System technical journal . Fig. —Reflection of light from a single set of similarly oriented etch-pit facets, A,is like that from a single mirror, B. Reflection from all three sets of facets of a Z-cutsection will give a three-fold etch-figure on a screen, as in C. with regard to natural faces, which are of course produced by essentiallyopposite effects, , acid corrosion m the case of etch-pits, and growth fromsolution in the case of natural faces. Actually, many curved-facetsgive optical effects showing no discernible evidence of individual flat , the question is academic, so far as use of the pits for orientationpurposes is concerned, for such facets are still definitety related to the cr\-stalstructure. Etch-pit facets may be used to reflect a light beam into specific patterns orto refract the beam on transmission through the material into similar (butnot identical) patterns. The different basic optical means of using etch-pitfacets are shown in Figs. , , Included in each fi
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
