| 摘要 |
A device for detecting optical radiation with a focusing means (1) for focusing to a focal plane and a detector means (8) with at least one detector element (12) in a detector plane (9) is described. It is primarily characterized by at least one optical fibre (2, 3) which guides radiation from the focal plane to the detector plane (9). An optical element (6) with substantially the same refractive index as that in the optical fibre (2, 3) is arranged between inlet plane (5) of the optical fibre and the focusing means (1). The radiation coming into said inlet plane (5) forms the angle (delta) with the longitudinal axis (10) of the optical fibre, which in turn forms the angle (alpha) with a normal to the exit plane (7) of the optical fibre. If (alpha) is greater than 1,5 (delta), radiation reflected from the detector plane (9) spreads outside the focusing means. (alpha) shall be smaller than the angle that means total reflection in the exit plane (7) of the optical fibre. |
