As members of the former Instrumentation Group at the Argelander Institute for Astronomy (AIfA) of the University of Bonn we have continued the successful technical developments with our own private company "Bonn-Shutter UG (haftungsbeschränkt)". We cooperate with the University. Our focus is on high precision exposure shutters of various formats. Bonn Shutters with apertures from 60mm to 1310mm are in use at CCD cameras for telescopes at major astronomical observatories around the world.
Our shutters are slit type shutters with a rectangular or circular aperture. They are low acceleration impact-free device. They consist of three main components --- mechanics, control electronics hardware and control electronics software --- which play together to achieve the shutter performance presented in the table below.
Bonn Shutter parameters and specs
|Shortest exp. time||About 1msec.|
|Exposure homogeneity||Deviations <+-0.5% at 100msec exposure time.|
|Exposure time accuracy||About 0.3msec.|
|Expected lifetime||>1 Million operations (Endurance test with 10**7 operations passed)|
|Dead time||0.2sec - 1sec depending on aperture size|
|Blade material||Carbon fibre or sandwich|
|Movement control||Microcontroller system. Software programmable velocity profile.|
|Exposure control||External, TTL (but internal exposure timing provided).|
|Control Interfaces||Control and status lines, RS232 line.|