Variable Focus Adapter
Patent, filed 11 Jul 1995, patented 1 Apr 1997
NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
Pagination or Media Count:
A variable focus adapter is disclosed that comprises the combination of a lens and an aperture provided by a plate all lodged in a housing that is placed so that the lens is in proximity with each objective lens of a binocular arrangement to change the focal range from greater than 20 ft. to seven 7 ft. with a depth of field spanning from 5 to 15 ft.
- Optical Detection and Detectors