Adaptive Principle in Optical Instrument Design

摘要

The common path concept has been used in optical instrument design for 30 years.In fact, the designer tacitly accepts that the light traverses its path during a time period that is sufficiently short such that the atmospheric state remains the same. Now, while the measurement range is being extended or the perturbation is intensifying, the atmospheric state no longer remains the same in the given time interval, and thus, the common path concept reveals its shortcomings.