| 摘要 |
<p>An optical scanning system including a spinner (3) containing at least one plane linear diffraction grating (2). As the spinner'is rotated, a plane reconstruction wavefront (20) of wavelength λr is directed onto the grating creating a diffracted wavefront (21) which can be focused onto an image plane (25). The grating is constructed so that the ratio of the reconstruction wavelength λr to the grating period d is a value lying between the range of 1 and 1.618. The angles of incidence and diffraction of the reconstruction wavefront in a preferred embodiment, approximates 45°.</p> |
