16 Find the system matrix for a Cooke triplet camera lens. Light entering from the left encounters six spherical surfaces whose radii of curvature are, in turn, r to r6. The thickness of the three lenses are, in turn, t to 13, and the refractive indices are n, to n3. The first and second air separations between lens surfaces are d and d. Sketch the lens system with its cardinal points. How far behind the last surface must the film plane occur to focus paraxial rays? Data: r = 19.4 mm 1 = 4.29 mm n = 1.6110 2 = -128.3 mm 13 = -57.8 mm r4 = 18.9 mm rs = 311.3 mm n2 = 1.5744 n3 = 1.6110 12 = 0.93 mm 13 3.03 mm %3D %3D di = 1.63 mm dz = 12.90 mm r6 = -66.4 mm %3D
16 Find the system matrix for a Cooke triplet camera lens. Light entering from the left encounters six spherical surfaces whose radii of curvature are, in turn, r to r6. The thickness of the three lenses are, in turn, t to 13, and the refractive indices are n, to n3. The first and second air separations between lens surfaces are d and d. Sketch the lens system with its cardinal points. How far behind the last surface must the film plane occur to focus paraxial rays? Data: r = 19.4 mm 1 = 4.29 mm n = 1.6110 2 = -128.3 mm 13 = -57.8 mm r4 = 18.9 mm rs = 311.3 mm n2 = 1.5744 n3 = 1.6110 12 = 0.93 mm 13 3.03 mm %3D %3D di = 1.63 mm dz = 12.90 mm r6 = -66.4 mm %3D
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