The purpose of this test is to determine the ability of an optical fiber cable or cable element to withstand bending when wrapped and unwrapped around a test mandrel. Note: This test may be performed at any specified temperature, including the low or high temperature. The invention relates to the technical field of butterfly-shaped optical cable detection and discloses a butterfly-shaped lead-in optical cable fracture detection device, which comprises a detection workbench and a detection mechanism, wherein the detection mechanism comprises two groups of guide. Fiber optic cable bend radius is a critical mechanical parameter that determines how sharply a cable can be bent without risking microbending, macrobending, signal loss, or long-term structural fatigue. For long distance fiber cable, there is a possibility of optical fiber to bend with very small radius especially in joint closures which caused optical power to attenuate.
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