Method of manufacturing opening structure with light collecting function, method of manufacturing light collecting member, and method of determining direction of light collecting member

摘要

PROBLEM TO BE SOLVED: To obtain desired daylighting performance, by readily discerning orientation of a daylighting member and installing, or enabling installation of, the daylighting member in a proper orientation.SOLUTION: A method of the present invention includes: a preparation step in which laminated glass 10 is prepared that includes a light deflection element 22 for totally reflecting light incident on a front surface 10A from a direction inclined upward by an angle within a design angular range Ra, when top, bottom, front, and rear sides of the laminated glass are positioned in a prescribed orientation, and the light totally reflected by the light deflection element 22 is emitted from a rear surface 10B; and an orientation discerning step in which orientation of at least one of the top, bottom, front, or rear sides of the laminated glass 10 is discerned. In the orientation discerning step, orientation of at least one of the top, bottom, front, or rear sides of the laminated glass 10 is discerned based on light emitted from the laminated glass 10 after having test light Lt input into the laminated glass 10 from a direction inclined by a prescribed angle θt within the design angular range Ra.SELECTED DRAWING: Figure 6