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pro vyhledávání: '"David F. Schaack"'
Autor:
David F. Schaack
Publikováno v:
SPIE Proceedings.
Field correcting lenses have been used to increase the fields of view of large telescopes since at least Ross's work in 1935. In recent years, due to the advent of electronic image sensors, there has been movement toward combining field correction wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68ba395854e2bb4b7be293affd2ab12c
https://doi.org/10.1117/12.679075
https://doi.org/10.1117/12.679075
Autor:
David F. Schaack, Allen R. Geiger
Publikováno v:
SPIE Proceedings.
One of the limits to the sensitivity of differential absorption lidar (DIAL) when using a topographic reflector is the spectralvariation of the reflectance of the topography (differential albedo). This is especially a problem when DIAL is attemptedfr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3799c96fdb6d67e4c512057a910de0c
https://doi.org/10.1117/12.397781
https://doi.org/10.1117/12.397781
Autor:
David F. Schaack
Publikováno v:
SPIE Proceedings.
A new system for making dimensional measurements through a rigid borescope is described. Unlike commercially available systems, the random error in the measurement is proportional to the range to the object, rather than to the square of the range. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::679e00fc7c32cc3d7fc4a62602a39ab3
https://doi.org/10.1117/12.305062
https://doi.org/10.1117/12.305062
Autor:
David F. Schaack
Publikováno v:
Applied Optics. 41:1282
Applications of optical systems, including depth by focus and three-dimensional metrology, have been developed recently in which the image is characterized over a range of object depths simultaneously and in which the focus of the systems is also var
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cdf984361510b9ff13f5881623733f6f
https://doi.org/10.1364/ao.41.001282
https://doi.org/10.1364/ao.41.001282
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