SU819590A1 - Double monochromator - Google Patents

Description

one

The invention relates to spectral instrumentation.

There are various variants of double monochrelates with two consecutively installed single monochromators 1 j. ,

The closest technical solution is a binary monochromator containing an entrance slit, two radiator lenses, two dispersing elements, two chamber lenses, an intermediate slit, an exit slit and an optical interface system of the first chamber and second collimator lenses. 2

However, there is a limited functionality, namely the lack of ability to work with the addition of subtracting the dispersions of both dispersing elements.

The aim of the invention is to enhance the functionality of a double monochromator by ensuring that both the addition and subtraction of the variances work.

This goal is achieved due to the fact that in a double monochromator, which contains an inlet slit, there are two collimator lenses, two dispersing elements, two chamber lenses, an intermediate slit, an exit slit, and an optical interface system of the first chamber and second collimator lenses made in the form. two flat reflectors, the latter are installed with the ability to move along the line connecting the center of the reflector with the center of the adjacent lens, and rotate around an axis perpendicular to the plane of dispersion. monochromator provided with additional slit-shifted relative pro5 interstitial gap in the dispersion plane in the direction of the line connecting the first and second lens ss1marny collimating lens.

0

The drawing shows the optical layout of the proposed dual monochromator.

The monochromator contains an entrance slit 1, the first collimator lens 2, the first dispersing element (diffraction grating) 3, the first chamber lens 4, the intermediate slit 5, the second collimator lens b, the second dispersing

element 7, second camera lens

8 and exit slot 9.. .

Between the entrance slit 1 and the nepBt i collimator lens 2, between the second chamber lens 8 and the exit slit 9 are installed flat mirrors 10 and 11, respectively. All lenses 2, 4, 6 and 8 can be made in the form of spherical mirrors with the same focal length. In this case, the entrance slit 1 must be connected with the meridian focus of lens 2, and exit slit 9 with the HtJM meridial focus of lens 8.

In addition to the spectral slots 1.5 and

The 9-monochromator is provided with an additional slot consisting of a knife 12, parallel to the knives of the intermediate slot 5, and a flat mirror 13, perpendicular to the knife 12. The additional slot on the slot is offset from the intermediate slot 5 towards the O & A line connecting the centers of the first chamber and second collimator lenses 4 and 6.

On both sides of the intermediate slit 5, there are flat reflectors 14 and 15 forming the optical interface system of the first stone and second collimator objectives 4 and 6. Each of the reflectors 14 and 15 is mounted for movement along a line connecting the center of the reflector 14 or. 15 with the center of the adjacent lens {first chamber 4 or second collimator 6, respectively), i.e. along the line O 04 or 0, .5-0, respectively. In addition, each of the flat reflectors 14 and 15 can be rotated around an axis perpendicular to the dispersion plane of the monrochromator.

Double monochromator works as follows.

The radiation transmitted through the entrance slit 1 is guided by a flat mirror 10 to the first, collimator objective 2, and then falls on the first diffraction grating 3. The radiation diffracted by the grating 3 is guided by the first chamber objective 4 to a flat reflector 14. In one of the work options the monochromator flat reflectors 14 and 15 due to the displacement along the line,, respectively, and turns around the axes, perpendicular to the plane of the dispersion; these are set in such a way that the meridian focus of the first KS1 dimensional 4 and second collimating lenses 4 adjacent to them and. b were aligned with the plane of the intermediate slot 5.

In this case, the radiation reflected from the flat reflector 14 ,. focuses in the plane of the intermediate slot 5, which distinguishes a narrow spectral interval. The radiation transmitted through the intermediate slot 5 is sequentially reflected from -POL-. The reflector 15 and the second collimator lens b are diffracted by the second diffraction grating: 7 and directed by the second lens 8 and the flat mirror 11 to the entrance slit 9. In this case, the pa6oTaieT double monochromator with the addition of the dispersions.

In the second version of the monochromator's operation, the flat reflectors 14 and 15 are set to a dim position at which the image of the entrance slit 1 created by the lens system 2-4 and the grid 3 is aligned with the additional slit 12 and 13 / and the image of the additional slit 12 and 13 created by the lens system b, 8 and a 7 ″ grating — with an exit slit 9. Radiation in a narrow spectral interval, extended by an extra slit 12 and 13, is directed by the reflector 15 and the second collimator lens 6 onto the diffraction grating 7, is diffracted by it; torym chamber zerkalrm lens 8 and 11 on the exit slit 9. However, in this case, due to the additional reflection from mirror 13, the dispersion oboih.odinarnyh monochromators mutually subtracted, in particular if these dispersions are equal, double monochromator has zero variance.

In the present monochromator, the transition from addition operation to operation with subtraction of dispersions is accomplished by interchanging two flat reflectors 14 and 15.

Claims (2)

1.Patent IT 4102576, .kl. 356/101, publ. 1978 2. US patent 4017185, cl. 356/102 publ. 1977.