ALIGNMENT TECHNIQUE FOR SEALED OPTICAL SYSTEMS
Original Publication Date: 1992-May-01
Included in the Prior Art Database: 2002-Jan-04
This publication describes a technique for active align- ment of hermetically sealed optical systems. Typical sys- tems containing optical components which must be isolated from their external environment include evacu- ated chambers such as dewars and target detectors, mon- itors of harsh manufacturing processes involving caustic chemicals or extreme environmental conditions, and underwater photographic or video cameras. The need for the periodic purging of impurities, replacement of resilient seals, or for precise pre-seal alignment is elimi- nated. Three techniques which are currently applied in lieu of this invention, and the disadvantages of such sys- tems, are described in the following paragraphs.