The Use of Achromatic Doublets Beyond Their Design Range
by Brain, Alfred E.
Technical Note 217
Institution: AI Center, SRI International
Address: 333 Ravenswood Ave, Menlo Park, CA 94025
Achromatic doublets are often used in experimental laboratory "breadboards" outside the range for which the lens has been corrected. This investigation examines the use of a commercial 400-mm objective that has been corrected for the visible part of the spectrum, but is being utilized in a laser application at 852 nm. As the theoretical wavefront error at 852 nm is very small, the error attributable to the lens would probably be determined in practice almost entirely by the quality of its construction.
|Brain, Alfred (Ted) E.||Alumnus|