The present invention describes novel pyridine-3-sulfonyl compounds having the formula wherein R1, R2, R3, R4 and R5 are as defined herein. The composition forms a structure selected from the group consisting of an interpenetrating network structure and a thermoplastic vulcanizate structure. This method eliminates the subjective impressions of the evaluator from evaluation of microscope image resolution, so image resolution evaluation values of high accuracy and good repeatability can be obtained. The optical bridge can have an intermediate portion 163 for accommodating safe transition of the optical fibers 108 over the hinge line 129 of the housing 120.