Optical device for detection of optical defects for an imaging system

摘要

An optical monitoring device for an optical imaging system having a focal plane, an optical axis and an entry pupil, forming an image of a scene substantially at infinity on an image detector disposed substantially in the focal plane, comprises: a virtually point-like emission source at the periphery of the detector and substantially in the focal plane; a reflecting element with a plane surface upstream of the imaging system relative to the direction of light rays coming from the scene, and according to a position and inclination where a monitoring image of the source produced by the optical system and reflected by the reflecting element is substantially in the focal plane on a detection element connected to a monitoring image analyzer allowing potential optical defects to be identified; the reflecting element having an annular shape allowing passage of light rays coming from the scene and passing through the entry pupil.

主权项

1. An optical monitoring device for an optical imaging system having a focal plane, an optical axis and an entry pupil, said system forming an image of a scene substantially at infinity on at least one image detector disposed substantially in said focal plane, the device comprising:
at least one substantially a point emission source disposed on the periphery of the detector and substantially in the focal plane, and a reflecting element with a plane surface, the element being disposed upstream of the imaging system when considering the direction of propagation of the light rays coming from the scene, and according to a position and an inclination such that a monitoring image of the source produced by the optical system and reflected by the element is disposed substantially in the focal plane on a detection element connected to means for analyzing the monitoring image allowing potential optical defects to be identified, the element having an annular shape so as to allow the passage of light rays coming from the scene and passing through the entry pupil.