Development of a system for photography of underground openings through drilled holes
Abstract
An inexpensive photographic system and relatively simple techniques for securing photographs of mines and caverns accessed through nominal 6-inch diameter boreholes are described. Techniques were developed for continuous circumferential stereoscopic coverage from a single borehole. Problems experienced with underwater photography led to the adaptation of a marine depth finder as a supplement to photography of surveying water filled cavities.
- Publication:
-
Final Report
- Pub Date:
- March 1981
- Bibcode:
- 1981mhtd.rept......
- Keywords:
-
- Boreholes;
- Photographic Equipment;
- Underground Structures;
- Cavities;
- Photography;
- Underwater Photography;
- Instrumentation and Photography