Figure 3

(a1–a3) and (c1–c3) are images of numbers and line elements and the corresponding intensity cross-sections of the line elements after transport through 4.5 cm of GARF(1). The integrated cross-sections are obtained by integration over the vertical axis of line elements. The reference images (a4) and (c4) are measured without any fiber; (b1–b3) and (d1–d3) are images of numbers and line elements and the corresponding intensity profiles of the line elements after transport through 4.5 cm of commercial imaging fiber FIGH-10–500N. The wavelength for a1)-a4) and b1)-b3) is 405 nm while the wavelength for (c1–c4) and (d1–d3) is 635 nm. The number “4” belongs to group 3 on the resolution test target. The line elements in (a2) and (b2) belong to group 4 number 6 on the resolution test target, and (c2) and (d2) belong to group 4 number 4. The visibility values (I_max − I_min)/(I_max + I_min) are 0.31 for (a3), 0.24 for (b3), 0.28 for (c3), and 0.28 for (d3), respectively. To calculate visibilities, the maximum values are calculated using the average of all three peaks and the minimum values are obtained using the average of the two valleys between the peaks.