The purpose of this test is to measure the profile of a line on
\nthe face of monochrome cathode ray tube (CRT) in order to estimate
\nthe resolution capacity of the CRT. Since the display on a CRT
\noften consists of a series of lines or line segments forming
\nalphanumeric characters or graphics patterns the line width is an
\nimportant parameter in the determination of the resolution. For
\nthis reason, the test method discussed below measures the
\nhorizontal and vertical (and possibly diagonal) profiles of the
\nlines produced by the electron beam or beams. From these profiles,
\nthe line widths can be determined. Such a test for determining the
\nsize of the CRT spot is the first step in any resolution
\ncalculation. Note that line profiles can also be determined from
\nmeasurements of the intensity contours of the CRT spot. This method
\nof determining the line profile is not discussed in this
\ndocument.<\/p>\n
The line profile of the CRT spot is dependent on a number of
\nfactors in addition to the focused electron beam distribution at
\nthe screen. Some of these factors are:<\/p>\n
1. Electron scattering in the screen and support structure<\/p>\n
2. Light scattering due to the granular nature of the phosphor
\nand the aluminum backing of the screen<\/p>\n
3. Saturation of the phosphor<\/p>\n
4. Internal reflections and absorption of light in the faceplate
\nand panels mounted onto the faceplate<\/p>\n
5. Optical coatings, etches, etc., on the faceplate or panel<\/p>\n
External influences on the resolution of the CRT, including
\nambient light, are not discussed in this method. These include the
\ntransfer characteristics of the viewing system, in particular, the
\nnon-linear response of a human observer.<\/p>\n
Determination of the resolution of a CRT is a complex problem
\nwhich is not completely solved at the present time. The reader is
\nurged to consult the current literature before making any
\nconclusions about the resolution of the display.<\/p>\n","protected":false},"excerpt":{"rendered":"
Line Profile Measurements in Monochrome Cathode Ray Tubes<\/b><\/p>\n\n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n ECIA<\/b><\/a><\/td>\n 1987<\/td>\n 10<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":556852,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2649],"product_tag":[],"class_list":{"0":"post-556844","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ecia","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/556844","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/556852"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=556844"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=556844"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=556844"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}