Uv shade chart and sunshade design

摘要

Ultraviolet radiation is divided into UV-A(315-400nm), UV-B (280-315nm), UV-C (under 280nm). Of these, UV-B may be cause serious health problem, such as cataracts, loss of skin immunity, and increase of skin cancer. For this reason, it is important to know how protect human body against the UV-B radiation. Sunshade is very effective to prevent the radiation. The radiation enters to the sunshade from sun and sky. The first step is to measure the sky radiance distribution of sun and sky radiation spectrum. We calculate erythema action ultraviolet radiation from the radiation spectrum. UV shade chart is made using distribution of the erythema action ultraviolet radiation. UV shade chart is useful for designing sunshade.