Visor for protective helmet equipped with optic system projecting image in front of user's eyes has outer side of visor moved by zero point four degree relative to inner side of visor

摘要

When visor is worn, user has impression landscape moves upwards. Changes using optic proprieties of visor are used to reduce this error. Outer side of visor (S2) is moved by 0.4 degree relative to inner side (S1). Center (C2) of outer side is separated from center (C1) of inner side, and is slightly moved upwards. Visor has thickness increasing from bottom to top, i.e. if visor has average thickness of 2 mm, thickness variation from 1 to 3 mm is expected between bottom and top.