Optical module for hyper-hemispheric field image capture and controlled distortion, compatible with an outdoor environment

摘要

Optical image capture module that has an optical axis and that includes in this optical axis: - a mono-pupil head component (10) with a hyper-hemispherical input field, quasi afocal in the vicinity of the 90 ° angular radio field , - with a refractive entry surface (11) which is a surface of revolution with a straight generatrix inclined about the optical axis with an angle of less than 30 ° - with a concave exit face (12) seen from the outside of the component, with a central area (122) refractor and peripheral zone (121) reflector designated primary mirror, - and that includes a secondary aspherical mirror (13) in the predetermined useful zone, - associated with an optical aberration corrector (20) at the output of which is - a focus lens (30) on - a detector (40), - with an aperture diaphragm (50) located between the aberration corrector (20) and the focus lens (30), characterized in that: - the mirror ( 13) secondary is spatially local focal length v variable in the useful area with a maximum local power for a part of this area used by a 90 ° angular radius field and a minimum local power lower by at least a factor of 2 for a part of this area used by a radio field angular less than 20 °, - the optical aberration corrector (20) includes at least one aspherical lens.