Find the system matrix for a Cooke triplet camera lens (see Figure 3-23a). Light entering from the left encounters six spherical surfaces whose radii of curvature are, in turn, r1 to r6. The thickness of the three lenses are, in turn, t1 to t3, and the refractive indices are n1 to n3. The first and second air separations between lens surfaces are d1 and d2. Sketch the lens system with its cardinal points. How far behind the last surface must the film plane occur to focus paraxial rays?
Data: | r1= 19.4 mm | t1 = 4.29 mm | n1 = 1.6110 |
| r2 = −128.3 mm | t2 = 0.93 mm | n2 = 1.5744 |
| r3 = −57.8 mm | t3 = 3.03 mm | n3 = 1.6110 |
| r4 = 18.9 mm |
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| r5 = 311.3 mm | d1 = 1.63 mm |
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| r6 = −66.4 mm | d2 = 12.90 mm |
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