| abstract |
The invention relates to a wide-angle optical system (10, 11) for a detector (32) for the infrared spectral range, wherein the wide-angle optical system (10, 11) comprises a lens system which extends in the direction from the object side to the image side a. an inverse Galileo telescope (20) with a negative (22) and a positive lens (24) and b. an arrangement (12) of three further lenses (14, 16, 18), one lens (18) being negative and two lenses (14, 16) being positive, includes. |