| 摘要 |
<p>Light transmittable members mainly applicable to a natural lighting window in an opening of a general building and a method of adjusting a natural lighting quantity and a natural lighting range in a room of a general building by use of the light transmittable members. There are formed a light transmittable member having a plurality of refracting columns arranged in parallel to one another between two light transmittable plate members and a light transmittable member having reflecting zones arranged in parallel to one another on a base material surface; as solar rays for adjusting the natural lighting quantity, optional solar rays S1, S2 and S3 emitted from the sun at different altitudes and azimuths, the relationship between angles of incidence alpha , beta and gamma of which with reference to the respective altitudes and azimuths satisfies the condition, alpha < beta < gamma , are selected, and the natural lighting quantity or the natural lighting range is adjusted according to the constructions of the respective light transmittable members, whereby differences in heat quantity in the room in respective seasons or respective time zones which are caused by the annual motion or the diurnal motion of the sun are adjusted through the utilization of the differences in altitudes or azimuths of the sun, so that the effective heat utilization can be achieved. <IMAGE></p> |
