Assembly of diffraction limited lens system is equally as important
as the polishing of the lens elements themselves. In fact, many times
performance degradation is traced to poor lens assembly, not the
lens elements. In particular, air-spaces, centration, tilt and wedge
are the key determinants of a quality lens system.
In high resolution systems, very often it is necessary to measure
and maintain lens spacings to the order of a few microns. Not an
easy task, but one that we have worked extensively at perfecting.
Through the use of micron indicators coupled with proprietary assembly
equipment we can hold lens spacing tolerances to the order of 1 micron.
This is only possible through constant reoptimization of the lens
design during the assembly process.
Centration, Wedge and Tilt
A major challenge during assembly of diffraction limited optics
is to maintain the centration, wedge and tilt specifications for
the system of lenses as a whole. Simply inserting lenses and spacers
into lens tubes is not sufficient or even possible in many cases.
Over the years we have developed both standard and proprietary techniques
for insuring that all tolerances are met.
Air-Space Tolerances Held to 1 Micron
Continuous Lens Design Reoptimization During Assembly
Centration, Wedge and Tilt tolerances held to Better than 1 Micron