| 摘要 |
FIELD: optical spectral instrumentation engineering. SUBSTANCE: Fourier spectrometer than has optically coupled radiation source, two flat mirrors, light splitter, and position-sensing linear photodetector is provided in addition with beyond-axis elliptical and parabolic mirrors, the former being mounted at input of light splitter so that it reflects input aperture of spectrometer, which is in first focus of ellipse, into its second focus symmetrically arranged between flat mirrors, and the latter is located at outlet of light splitter so that source is arranged in first focal plane and photodetector, in rear focal plane. Inlet and outlet mirrors may be spherical when photodetector with low spatial resolution is used. EFFECT: eliminated chromatic and spherical aberrations, reduced size not exceeding that of interferometer chamber, simplified design, improved vibration stability. |
