| 摘要 |
<p>The invention concerns a light-transmitting optical device comprising a first lens (14) of the condenser element (12) and a second lens (18) of the objective (16) arranged respectively at one first end (22), and at a second opposite end (24) of an integrated optical module (26), which is provided by a rectilinear single-piece entity made of transparent material. The intermediate zone (28) comprises a plurality of deflectors (30A, 30B, 30C, 30D) formed by a succession of dioptric surfaces (D1 to D7) distributed along the direction of the light flux propagation between the first lens (14) and the second lens (18), so as to ensure a deflection outside the optical module of the stray rays reflected inside the optical module, thereby inhibiting transmission of stray rays, either through the second lens (18) of the objective (16) if it is a light transmission coming from the condenser element (12), or through the first lens (14) when receiving light coming from the second lens (18). The invention is applicable to safety optoelectronic barriers.</p> |
