Spectrometer adjustment experiment report

 Content 1:

(1) Telescopes are suitable for observing parallel light, or telescopes focused on infinity; (2) The collimator can emit collimated light; (3) The optical axis of the telescope and collimator is orthogonal to the central axis of the spectrometer. Then, familiarize yourself with the structure and the role of each adjustment screw against the instrument.

1. Visual coarse adjustment Observe directly with your eyes and adjust the optical axis height adjustment screws (22 and 9) of the telescope and collimator to make the optical axis of the two as horizontal as possible; Adjust the three leveling screws 13 under the stage to make the stage horizontal. If the coarse adjustment is done well, it can reduce the blindness of the subsequent fine adjustment and make the experiment go smoothly.

2. Fine adjustment 1. Adjust the telescope to observe the parallel light appropriately (1) The focus of the eyepiece. Adjust the sight of the program mirror to adjust the handwheel 23, so that the field of view can see the clear "shape fork silk image" on the reticle. (2) turn on the telescope light source, put the plane mirror on the stage according to the position shown in Figure 3-7-6, slowly rotate the stage, a spot can be seen from the telescope, if you can't find it, the coarse adjustment is not adjusted, then you can observe the plane mirror with your eyes, find the reflected beam, adjust the position of the optical axis of the stage and the telescope, make the telescope can receive the reflected beam, and see the spot from the field of view of the eyepiece. Figure 3-7-6 Position of the platform mirror on the stage

 Content 2:

1. The basic principle is that a beam of parallel light formed by passing light through a slit and a focusing lens is reflected or refracted into the telescope objective and forms an image on the focal plane of the telescope, and we observe and measure the deflection angles of various rays through the eyepiece. thus it is possible to obtain optical parameters and so on .

2. Spectrometer is an instrument that accurately determines the deflection angle of light, it can also be called a goniometer, it is an experimental instrument often used in optical experiments, and many basic quantities in optics can be directly or indirectly expressed by the deflection angle of light. Therefore, these quantities can be measured with a spectrometer.

3. The basic optical structure of the spectrometer is the basis for many optical instruments (such as prism spectrometers, grating spectrometers, spectrophotometers, monochromators, etc.), in order to obtain correct measurement results when observing relevant phenomena and measurement angles, It is important to ensure that the optical system of the spectrometer (collimator and telescope) is suitable for collimated light.