Method and apparatus for increasing optical density ratios of light valves

摘要: A method and apparatus is disclosed for increasing the optical density ratio of light valves. The a measure range transmission valve, between with valve inactivated when it activated. To accomplish this change, constructed so that contains more fluid suspension in off (inactivated) condition to produce high density, less just prior being activated as well controllably decrease its density. This increased amount on increases valve. Apparatus incorporating device into photographic camera also disclosed.