Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Schematic of a classic Schwarzschild objective that consists of two mirrors. The object distance is demonstrated in a finite distance. The potential space (yellow shaded region) can be used to include additional channels (e.g. functional elements) to create a multi-channel imaging system.
