W.M. Welch Scientific Company Grating Spectrometer
Files
Download welch spectrometer manual.pdf (990 KB)
Description
The W.M. Welch Scientific Company grating spectrometer, No. 3693, was manufactured around the 1950s. A light source can be placed at the slit near the wider end, by which it will illuminate a graduation scale, measured in angstroms, inside of the device. The width of the slit can be adjusted using the silver knob attached to the back of the spectrometer. A small reading light can be attached to the clamp between the scale and the slit for the purpose of making the scale easier to view. When looking through the scope, you will see the first-order spectrum of the light source appear on a marked scale to the right, allowing you to view the distance between the fringes.
The spectrometer can be calibrated using a known light source, such as helium. Place a helium light source in front of the slit on the back of the spectrometer. Look through the scope. You should see a yellow fringe between the 58 and 59 angstrom line. The slit may need to be adjusted in width depending on the strength of the light source. If the yellow fringe is not in this position, then the eye piece of the scope may need to be adjusted. Consult the digitized manual for instructions on this process.
Manufacture Date
1950
Publication Date
1950
Publisher
W.M. Welch Scientific Company
Keywords
spectrometer, diffraction
Disciplines
Physical Sciences and Mathematics
Recommended Citation
Owens, Natalie E., "W.M. Welch Scientific Company Grating Spectrometer" (1950). Restored Dana Physics Equipment. 2.
https://digitalcommons.hollins.edu/dana_equipment/2