| 摘要 |
<p>An iris-producing lamp device comprises a non-monochromatic light source (3) with its socket or sockets mounted on a bracket (2) attached to a support (1). A paraboloidal mirror may be disposed behind each lamp socket so that the light source is at focus of the mirror. An iris-producing lampshade of the lamp device comprises a diffracting grating in the form of a grating film (5) sandwiched between two transparent sheets (4). Thus the lampshade can reflect not only its original colour but also other colours when the lamp is off and can transmit a variety of colourful patterns and project them to objects around the lamp device when the lamp is on.</p> |
