Spectrometer » History » Revision 2
Revision 1 (Joseph Foley, 2011-09-27 23:28) → Revision 2/4 (Arnar Stefánsson, 2011-10-04 09:29)
h1. Spectrometer h2. Functional Requirements (FR) 1. Measure light intensity at a fixed frequency (visible light) > (a) Split light > (b) Select frequency > > i. Resolution > > > A. Wavelength selectable in 1-10 nm steps > (c) Measure the light intensity over the full spectrum of VIS light > > i. Accurate -> no more than 1% off (5 nm) > > ii. Reasonably fast -> each scan of the spectrum should take no more then XX second(s) > > iii. Re calibration after scan should not be required. > (d) Repeatable Measurements > > i. Light intensity measured for a given sample at a fixed frequency should have minimal drift (< 1% ?) over the course of one experiment (2 hours) 2. Communicate data to student for plotting > (a) Store data > (b) Display data 3. Set up by instructor in < 15 minutes 4. Able to manufacture locally 5. User friendly for 1st year students > (a) Easy to calibrate > > i. Calibrating the light sensor takes less than 1 min > > ii. Zero the spectrometer > > iii. No additional equipment required for calibration > (b) Independent of computer, or plug & play 6. Expected lifetime 3-5 years > (a) Rugged > > i. No irreversible damage from 15 cm drop to lab bench > > ii. Chemical spills > > > A. Conductive liquids do not damage electronics * blah h2. Design Parameters (DP) * blah h2. Vendors