| 摘要 |
<p>A spectroscopic device hardly causing crosstalk when lights in different wavelength ranges are received. Detection light enters a dichroic mirror (hereinafter referred to as "mirror") (DM1) perpendicularly to a photoelectric surface (7). Therefore, the light passing through the mirror (DM1) impinges on the photoelectric surface (7) generally vertically. The light reflected from the mirror (DM1) is reflected from a main mirror surface (23a). The dichroic mirror array (21) is inclined so that the mirror (DM8) where the shortest wavelength is minimum is nearer to the photoelectric surface (7) than the mirror (DM1) where the shortest wavelength is maximum. Since the dichroic mirror array (21) is generally parallel to the main mirror surface (23a), the light reflected from the main mirror surface (23a) enters a mirror (DM2) perpendicularly to the photoelectric surface (7). Therefore, the light passing through the mirror (DM2) also impinges on the photoelectric surface (7) generally vertically. In such a way, the light passing through each mirror (DMn) impinges on the photoelectric surface (7) generally vertically, and as a result crosstalk can be suppressed.</p> |
