Abstract
The reporters have succeeded in the contrivance of a new apparatus for the evaluation of daylight environment including 'sun paths', 'sky factors' and 'sky configuration factors'. This apparatus consists of the two main parts, the camera with a fish-eye lens and the round-shaped apparatus frame with the curves of projection forms lined on its surface. Speaking of whole outward appearance of this apparatus, the camera seems to be covered with the frame at sight, so that the curves of the frame can be come out with the scenery objects on the photograph. Therefore, the photograph taken with the new apparatus is exactly the basic data for the evaluation of daylight environment; there is no need to do usual troublesome works, and so the measurement of daylight environment can be done more easily than usual. Incidentally, as a result of experimental measurement, this apparatus is quite easy to treat, its basic data for daylight environment is extremely accurate, and so speaking of its practicality, this apparatus is too practical.
