Spectrometer¶

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

Design Parameters (DP)¶

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Vendors¶