OPTICAL ELEMENT FOR A VARIABLE-MESSAGE SIGN

摘要

Optical component for variable message signs consisting of RGB LED diode (1) of SMD type as a source of three mono-frequency radiations, further of an area (14) following this diode (1) of coaxially arranged lightguide (2) and of a behind the lightguide (2) following coaxially arranged optical lense (3) where the optical lens (3) is placed on the reversed side of the diode (1) and made as astigmatic, includes the lightguide's (2) body which is made of a quadrilateral input pyramid (11) and truncated quadrilateral output pyramid (12) which are mutually firmly connected by apex surfaces of identical cross-section where the height of the input pyramid (11) is at least 1,2 mm and at the same time lower than the height of the output pyramid (12), the vertex angle of the input pyramid (11) is acute and the vertex angle of the output pyramid (12) is acute.