| 摘要 |
<p>A visual signaling apparatus including an enclosure 50 having an aperture 61, and defining a cavity 60, a light source 70 for emitting light in predetermined wavelengths borne by the enclosure 50 and positioned in the cavity 60; and a semi-transparent dichroic mirror 110 borne by the enclosure 50 and disposed in substantially occluding relation relative to the aperture 61, the semi-transparent dichroic mirror 110 being adapted to selectively reflect ambient light and to transmit the predetermined wavelengths of light emitted by the light source 70. <IMAGE></p> |
