Page 254 - Optofluidics Fundamentals, Devices, and Applications
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0.25
                                               0.2
                                               0.15
                                               0.1
                                               0.05
                                       0.25
                                          0.2
                                             0.15
                                     0.3
                          0.5
                            0.45
                    0.6
                       0.55
                                  0.35
                               0.4
                                     Conic factor (K)
                                                   0.25 Curvature (C) (1/mm) Plot of curvature (C) vs. conic factor (K) of the aspherical PDMS lenses. The ratio of pre-stretch and the thickness of the
                    100 um 33% prestretch 100 um 15% prestretch 200 um 15% prestretch 200 um 24% prestretch 200 um 33% prestretch 100 um 24% prestretch  0.2  0.15  Curvature (C) (1/mm)
                                                   0.1     membrane affect both the curvature and the conic factor of the PDMS lenses.



                                                   0.05

                    2.5  2   1.5  1   0.5  0    –0.5
                                                         FIGURE 9-23
                                       Conic factor (K)



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