| 摘要 |
The invention relates to an incandescent lamp, in particular, a halogen incandescent lamp for the generation of light in a near-infra-red wavelength range (NIR-wavelength range), comprising a transparent lamp housing, an illuminant enclosed by the lamp housing and an interference filter arranged on the lamp housing, comprising several layer stacks (30, 32, 34) with a number of optically low-refraction and high-refraction layers, whereby a first layer stack (30) of the interference filter (28) is embodied as an absorption filter for the absorption of unwanted light spectra, comprising at least two absorption layers and an optical low-refraction intermediate layer, arranged between the absorption layers. According to the invention, the absorption filter (30) has a low transmission of light in an essentially red spectral range and the interference filter (28) has a filter edge in the NIR wavelength range as a result of the further layer stack (32, 34). |
