| 摘要 |
<p>A dispersive optical device for use such as a polarizer, spectroscope, monochromator or the like for utilization as a basic component for a monochromator, polarizer, spectroscope, spectrophotometer or the like, includes a dispersive optical member comprising a first and a second grating (3, 4) planar parallel applied on a substrate, preferably reflection gratings with the same grating frequency, said gratings (3, 4) being applied with parallel grating rulings, whereby light diffracted by the first grating is arranged to strike the second grating (4). The first grating (3) defines the element's input and the second grating (4) defines the element's output.</p> |
