Patent ID: 8027023
Filing Date: 2011-09-27
Classification: G03F

Abstract:
1. An optical imaging device comprising at least one optical element; a first part of said optical element contacting a first atmosphere and a second part of said optical element at least temporarily contacting a second atmosphere, wherein a reduction device is provided, said reduction device at least reducing dynamic fluctuations in a pressure difference between said first atmosphere and said second atmosphere, wherein said reduction device comprises a control device and an adjustment device connected to said control device; said control device is configured to determine a frequency and a first amplitude of first pressure waves within said second atmosphere, said adjustment device, as a function of said frequency and said first amplitude of said first pressure waves as well as controlled by said control device, is configured to generate second pressure waves in said second atmosphere in such a manner that said second pressure waves and said first pressure waves interfere to form resulting pressure waves with a resulting amplitude that is one of smaller than said first amplitude and substantially zero, a shell structure is adjacent to and at least partially surrounds at least one member selected from the group consisting of said optical element and a holding device that holds said optical element, said adjustment device comprising at least one pressure wave generating device mechanically connected to said shell structure and configured to generate said second pressure waves, wherein said shell structure is non-pressure tight.