. "More particularly, as shown on FIG. 4, if the polarizer 25 and analyzer 28 are in the condition of orthogonal nicol relative to each other, the intensity I of the laser light beam at the output of modulator 13 will be proportional to sin KV, as represented by the modulation curve 30 on FIG. 4, and in which K is a constant and V is the signal voltage applied to the electro-optic crystal 27." . . .