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1.80 The equipment used in the 1980s was abacus plus logarithm table, as well as drawings and theodolite.
2. Based on the traditional TV scanning principle, the relationship between raster scanning parameters, raster brightness expression and beam modulation performance parameter expression is derived.
3. The density of dot array is usually expressed by the number of screening lines.
4. The characterization method of electric derivative of laser array is studied, the equivalent circuit model of laser array is established, and the formula of electric derivative of array in ideal situation is deduced.
5. In order to facilitate the application, the author compiled the coefficient table of the six-degree algebraic transition curve, and emphatically expounded its application in the transition curve.