POSITIVE AND NEGATIVE COLLATOR FOR NEW STAR SEARCHING PHTOGRAPH

摘要

PURPOSE:To improve the efficiency for collation of searching phtographs, by overlapping both positive photograph and negative photograph. CONSTITUTION:A new star searching phtograph is photographed and developed to a positive. Then a positive photograph is obtained with a transparent image of the star and a dark background. A negative film to which the same shooting filed is photographed previously is put on the positive photograph. then the light is irradiated to the stacked photographs from the lower side. In such a way, the images of new stars or minor plantes glows on the positive film although they are not observed on the positive film.