| 摘要 |
The present invention relates to an optical transmitter unit (10) comprising a transmitter unit comprising at least one source (9) of infra-red light mounted to a base member (6), for transmitting messages by means of infra-red signals. The transmitter unit further comprises a reflector (3) unit mounted on the base member (6), wherein said reflector has a number (n) of reflecting surfaces (31, 32, 33, 34, 35, 36) for transmission. It is designed to distribute the infra-red light from said at least one source in a predefined space having an arbitrary number of boundary surfaces in such a way that a substantially uniform signal power distribution is obtained on at one or more selected boundary surfaces of said predefined space.
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