The individually made corrective lenses handheld laser eliminate the inevitable defects of the stack, almost entirely from X ray to 3/4 light field, the formation of 250 nm (millionth mm) diameter of the light field, close to the theoretical limit. X ray concentration can not only improve the measurement quality, but also open up study on the new way.
Suitable lens and reflector production has reached a very high handheld laser, but the standard lens made of beryllium, usually near the center is slightly too strongly curved. “Beryllium by molding precision mold lens. The shape error on the process sequence of hundreds of nanometers in is almost inevitable.” this led more focus by light scattering out, and because the laws of physics are inevitable. More importantly, the light distribution in a large area.
In order to optimize the focus, defect scientists first carefully measured handheld laser stack. Then they used precision laser in University of Jena, using quartz glass lenses. These data customization, this defect is not relevant in many applications. However, if you want to use X ray laser irradiation to the small sample, you to focus on a small area as much as possible.
No correction of the handheld laser, our focus is about the total X ray light distribution to about seventy-five percent, a diameter of about 1600 nm region. This is the theory can achieve about ten times as large as the focus area, when the glass is used, X ray seventy-five percent points can be concentrated to a diameter of about 250 nm region it is the best result, close to the theoretical value.