| 摘要 |
The invention relates to a frontal illumination device which can be fixed to the head of the user and makes it possible to observe narrow and deep cavities by providing a beam of substantially parallel light rays and an intense and homogeneous light spot, a light source 4 placed opposite the reflecting face of the mirror 1; means 5 for adjusting the distance separating the light source 4 from the mirror 1, characterised in that the mirror 1 is a concave mirror with symmetry about a long axis and having an average radius of curvature of less than 30 mm - in particular of the order of 27 mm - for a maximum transverse dimension of the order of 30 mm, and in that the light source 4 is placed on the long optical axis of the mirror 1. <IMAGE> |
