Zobrazeno 1 - 2
of 2
pro vyhledávání: '"D. H. Hamsher"'
Autor:
C. N. Nelson, D. H. Hamsher
Publikováno v:
Journal of the Optical Society of America. 40:863
An experimental study of the photography, from the ground, of objects in the upper atmosphere shows that the results are improved by the use of long-focal-length lenses, high contrast film, and color filters chosen with regard to the relative spectra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f25758eee1139d883abdfe66b63e4a5
https://doi.org/10.1364/josa.40.000863
https://doi.org/10.1364/josa.40.000863
Autor:
D. H. Hamsher
Publikováno v:
Journal of the Optical Society of America. 36:291
A description of the screen-line test for paraboloidal reflectors is given and the primary considerations involved in its use are presented. The test is useful for reflectors having a face diameter at least as large as four times the focal length. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae015d8eb2446c6769281124b4f5c094
https://doi.org/10.1364/josa.36.000291
https://doi.org/10.1364/josa.36.000291