Notes tagged with spectrometer

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Fluorescein study 6 sample concentrations plus an upgrade to the DVD grating

by dhaffnersr about 11 hours ago | 0 | 65 | 0

First, I had to make an upgrade to the DVD piece in my spectrometer this weekend, the way it was,...

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Uv laser pointer (405nm <5mW) 2 stroke motor oil related testing Apr/29/2016

by dhaffnersr 2 days ago | 2 | 95 | 0

This research is in direct relation to my previous testing of 2 stroke motor oil. I have also inc...

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Using Ethyl acetate as a primary solvent for non-polar compounds

by dhaffnersr 3 days ago | 1 | 151 | 1

The picture above is the exact samples I used for this test on using Ethyl acetate for a primary ...

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Converting CSV files on Windows 7 on up with commas instead of decimals

by dhaffnersr 4 days ago | 2 | 170 | 1

upon trying to use the new csv (beta) version here at Plab, I couldn't figure out why I couldn't ...

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Spitfire peak pixel test

by viechdokter 5 days ago | 1 | 122 | 0

What I wanted to do this time is to take a series of spectra of the same CFL lamp in fast success...

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Announcing a Public Lab booklet: DIY Oil Testing

by warren 5 days ago | 0 | 396 | 2

Hello all -- today we’re announcing a booklet @gretchen, @stevie, @liz and I put together in Dece...

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Spectrometer DVD-Alignment Auto-Correction

by stoft 5 days ago | 0 | 151 | 0

Abstract This is a continuation of my investigation into extracting stable data from the PLab sp...

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Spectrometer Peak-Hold

by stoft 9 days ago | 0 | 211 | 0

Abstract This is a brief follow-on to my previous note on spectrometer noise reduction via Time-...

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Data Validation of previous Eosin Y results for April/21/2016

by dhaffnersr 9 days ago | 1 | 197 | 0

Using my Aries series green laser, I wanted to validate the Eosin Y study I did the other day wit...

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Prototype of easy-to-build rigid spectrometer housing

by warren 10 days ago | 12 | 291 | 1

What I want to do Building on work by @viechdokter and @stoft, and related to their and @yagiz's...

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And if I flip it over? Effects of a reversed polfilter on spectra.

by viechdokter 10 days ago | 0 | 159 | 0

So, now for something interesting... I repeated the polfilter turning angle test - but this time ...

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Spectrometer Noise Solution?

by stoft 11 days ago | 4 | 264 | 1

Abstract This is a continuation of my series on spectrometer noise which now focuses on observat...

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Plab spectrometer version 2.5 vs Spex FluoroMax

by dhaffnersr 11 days ago | 1 | 320 | 0

Sample preparation: 3 cuvettes used, 2 for sample dilutions and 1 for the blank (solvent.) I then...

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Effects of the turning angle of a polarizing filter onto spectra

by viechdokter 11 days ago | 2 | 203 | 0

Yesterday I found out that a polfilter can change the redness or blueness of a spectrum. @stoft s...

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Polarizing filter effects on spectra

by viechdokter 12 days ago | 1 | 196 | 0

The problem: Overexposure. Often - especially when taking sunlight spectra - I have the proble...

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Question: I want to do citizen bee science

by FortunaWolf 13 days ago | 7 | 274 | 1

What I want to do or know Hello human colleagues, The technical details are that I'd like to col...

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CFL repeatability study part two...

by dhaffnersr 13 days ago | 0 | 186 | 0

I put together 4 separate graphs demonstrating any "drift" time from time of data capture to end ...

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Spectrometer Time Filter

by stoft 14 days ago | 0 | 225 | 0

Abstract This next 'chapter' in the stability series attempts to observe the potential for camer...

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CFL Repeatability Study on 6 CFL spectrums

by dhaffnersr 14 days ago | 3 | 207 | 0

I scanned 6 CFL spectrums for 1 hour at 10 minute time exposures each and here are the results: ...

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Noise by colour

by viechdokter 14 days ago | 23 | 319 | 1

This is a revised note! There was a little error in my primary colour noise curves. The red curve...

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Batch work

by viechdokter 14 days ago | 0 | 168 | 0

@Warren: Hi Warren, yesterday I used your serial capture macro to do another reproducibility test...

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Signal to Noise ratio validation on previous fluorescein research study

by dhaffnersr 14 days ago | 0 | 184 | 0

I have analysed the SNR data for my previous work on fluorescein concentration study and these ar...

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accuracy test for version 2.5 Plab spectrometer

by dhaffnersr 15 days ago | 0 | 265 | 1

I ran a series of very detailed tests on my spectrometer this week, against already established d...

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Automatic Gain Control vs. Inverse square law

by viechdokter 15 days ago | 4 | 175 | 0

After my first trials with my torch light and the problems with the "light rings" it was emitting...

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Spectrometer Noise

by stoft 16 days ago | 5 | 331 | 1

Abstract This is a follow-on to my discussion of Spectrometer Stability and is an attempt to obs...

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Thinking about a more stable spectrometer...

by viechdokter 16 days ago | 15 | 281 | 1

I read a lot about a more rigid setup of the PLab spectrometer in this forum. So I thought about ...

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Question: Getting the spectrometer to work with a Raspberry Pi?

by anjohn12 17 days ago | 1 | 217 | 0

I am currently working on creating a program that will go to the spectral workbench page, login, ...

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Light source limits

by viechdokter 17 days ago | 1 | 172 | 0

Today I stumbled about another "problem". I wanted to take a set of spectrum captures where the ...

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Spectrometer Stability

by stoft 18 days ago | 9 | 254 | 2

Abstract Continuing the effort to define the specification limits of my Prototype PLab V3 Spectr...

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