INTEGRAL Optical Monitoring Camera Stray-Light Design

The Optical Monitor Camera (OMC) is a part of the scientific payload of the INTEGRAL spacecraft, scheduled to be launched in 2001. The OMC is an imager that will monitor star variations in the V-band in a 5 x 5 ° field of view. It is required that the instrument detects object of +19.7 magnitude within the FOV. This requires highly sophisticated baffling techniques to provide attenuation up to 10-45. To obtain such performances, the design of each sub-element is optimized to fulfil very stringent stray-light requirements. The stray-light sources are discussed and performances are simulated with a 3D ray-tracing model