| 摘要 |
<p>The projector comprises: a chamber designed to contain the object (3) to be projected, having dark, opaque, non-reflecting walls; a Fresnel lens (2) occupying an aperture in one wall of the chamber, said lens (2) having a diameter larger than the maximum dimension of the object (3) to be projected, an optical axis (8) projected in the direction of the object and a focal distance smaller than the length of the optical circuit between the object and the lens; one or more light sources located in the chamber to illuminate the object and suitably screened from the lens so as not to project diffused light on the latter.</p> |
