| 摘要 |
A spatial-spectral filter (6) adapted to be positioned between an outlet aperture (8) of a low-magnification sight (2) and an outlet aperture (10) of a magnifying device (4), comprises a central region (R1) having a first transmittance T1 in a first wavelength interval ?1, and a peripheral region (R2) radially outside of the central region (R1), having a second transmittance T2(?1) in said first wavelength region ?1, wherein T1(?1)>T2(?1). |
