| 摘要 |
The invention relates to a filter unit (10) for filtering light comprising a first mask (3) with first cavities, a prism unit (7) and a second mask (8) with second cavities. The prism unit (7) is located between the two masks (3, 8), the first (3) and the second mask (8) having corresponding first and second cavities, which form cavity pairs. At least one second cavity in the second mask (8) is provided for each first cavity in the first mask (3). In addition, one prism is provided in the prism unit (7) for at least one pair of cavities. This produces an accurate, narrow-band filter unit. The invention also relates to an assembly comprising the filter unit and to a device for capturing images. |
