| 摘要 |
<p>The light manipulation arrangement (1) of the present invention comprises a light source (2) and a transmission type diffraction grating (3), the light source being arranged to produce a light beam (i) directed to the diffraction grating, the incident angle (?) of the light beam and the grating geometry being adjusted to concentrate the incident light power to the R -1 reflection diffraction order backwards to the direction of the incident light beam and to the T 0 transmission diffraction order through the diffraction grating. According to the present invention, the diffraction grating (3) is of slanted type.</p> |
