Spectrometer » History » Version 2
Arnar Stefánsson, 2011-10-04 09:29
| 1 | 1 | Joseph Foley | h1. Spectrometer |
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| 2 | |||
| 3 | h2. Functional Requirements (FR) |
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| 4 | |||
| 5 | 2 | Arnar Stefánsson | 1. Measure light intensity at a fixed frequency (visible light) |
| 6 | > (a) Split light |
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| 7 | > (b) Select frequency |
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| 8 | > > i. Resolution |
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| 9 | > > > A. Wavelength selectable in 1-10 nm steps |
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| 10 | > (c) Measure the light intensity over the full spectrum of VIS light |
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| 11 | > > i. Accurate -> no more than 1% off (5 nm) |
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| 12 | > > ii. Reasonably fast -> each scan of the spectrum should take no more then XX second(s) |
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| 13 | > > iii. Re calibration after scan should not be required. |
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| 14 | > (d) Repeatable Measurements |
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| 15 | > > 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) |
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| 17 | 2. Communicate data to student for plotting |
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| 18 | > (a) Store data |
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| 19 | > (b) Display data |
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| 20 | |||
| 21 | 3. Set up by instructor in < 15 minutes |
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| 22 | |||
| 23 | 4. Able to manufacture locally |
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| 24 | |||
| 25 | 5. User friendly for 1st year students |
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| 26 | > (a) Easy to calibrate |
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| 27 | > > i. Calibrating the light sensor takes less than 1 min |
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| 28 | > > ii. Zero the spectrometer |
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| 29 | > > iii. No additional equipment required for calibration |
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| 30 | > (b) Independent of computer, or plug & play |
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| 31 | |||
| 32 | 6. Expected lifetime 3-5 years |
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| 33 | > (a) Rugged |
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| 34 | > > i. No irreversible damage from 15 cm drop to lab bench |
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| 35 | > > ii. Chemical spills |
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| 36 | > > > A. Conductive liquids do not damage electronics |
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| 37 | |||
| 38 | 1 | Joseph Foley | |
| 39 | h2. Design Parameters (DP) |
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| 40 | |||
| 41 | * blah |
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| 42 | |||
| 43 | h2. Vendors |