| 摘要 |
In the present invention, there is disclosed an imaging spectrograph optical system of high resolution intended for Raman spectroscopy in deep UV spectrum, comprising basic optical elements being represented by an inlet aperture for incoming polychromatic divergent beam of electromagnetic radiation rays, a collimating element for collimation of the incoming polychromatic divergent beam of electromagnetic radiation rays, a dispersion element for refractive or diffractive dispersion of the polychromatic beam to monochromatic beams according to the wavelength, a focusing element for creation of an image of the inlet aperture in focal plane at the place of the inlet aperture. The collimating element is represented by a collimating objective (7) consisting of a pair of aspherical mirrors (2, 3), where in the aspherical correction mirror (3) following up with the inlet aperture formed by a gap (1), there is performed an inlet opening (10) and the distant aspherical main mirror (2) is situated by its concave surface opposite to the aspherical correction mirror (3). The collimating element is represented by a collimating objective (7) consisting of a pair of aspherical mirrors (2, 3), where in the aspherical correction mirror (3) following up with the inlet aperture formed by a gap (1), there is performed an inlet opening (10) and the distant aspherical main mirror (2) is situated by its concave surface opposite to the aspherical correction mirror (3). Optical axes of the mirrors (2, 3) are divergent relative to each other. The dispersion element is represented by a diffraction grating (4) located in the path of collimated ray beam. The focusing element is represented by a focusing objective (8) formed by a system of lenses (9), from which at least one lens (9.7) has aspherical optical surface. |
