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stoft 88 research notes and wiki edits


1 questions asked

9 answers posted

217 comments posted



High-Rez WebCam Spectrometers

by stoft about 1 year ago | 6 | 1,412 | 2

Abstract Having experimented with software algorithms to enhance the PLab-3 spectrometer d...

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PLab-3 Proto Slit Upgrade

by stoft about 1 year ago | 5 | 561 | 2

Abstract The [PLab-3 Upgrade Proto](https://publiclab.org/notes/stoft/03-02-2015/plab-3-sp...

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All Paper-n-Tape Mock-Up Upgrade of PLab 3 Spectrometer

by stoft about 1 year ago | 0 | 489 | 2

Abstract From discussion with @abdul of PLab Kits, it appears there is an opportunity for ...

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Stability upgrade mockup for PLab Spectrometer 3.0

by stoft about 1 year ago | 13 | 1,279 | 8

Abstract The [PLab 3.0 Spectrometer](https://publiclab.org/wiki/desktop-spectrometry-kit-3...

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Spectrometer DVD-Alignment Auto-Correction

by stoft over 1 year ago | 0 | 993 | 0

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

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Spectrometer Peak-Hold

by stoft over 1 year ago | 0 | 764 | 0

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

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Spectrometer Noise Solution?

by stoft over 1 year ago | 4 | 1,368 | 1

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

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Spectrometer Time Filter

by stoft over 1 year ago | 0 | 737 | 0

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

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Spectrometer Noise

by stoft over 1 year ago | 5 | 1,181 | 1

Abstract This is a follow-on to my discussion of [Spectrometer Stability](https://publicla...

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Spectrometer Stability

by stoft over 1 year ago | 9 | 845 | 3

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

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405nm LED vs Laser

by stoft almost 2 years ago | 19 | 2,303 | 1

Abstract 405nm Lasers provide a powerful, narrow-band, pin-point source of monochromatic U...

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CFL Selection

by stoft almost 2 years ago | 3 | 1,453 | 3

Introduction Wavelength calibration of a PLab spectrometer requires a stable light source ...

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OTK Proto3 Analysis

by stoft almost 2 years ago | 5 | 1,419 | 2

Preface In my previous Research Note 'OTK Proto3' ( https://publiclab.org/notes/stoft/01-1...

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OTK Proto3

by stoft almost 2 years ago | 6 | 1,796 | 7

Preface I received an early Beta OTK to assemble and test but found the mechanics of the d...

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Musings: Spectrometer Stability

by stoft over 2 years ago | 11 | 1,928 | 2

My experiments with the PLab 3.0 spectrometer and PLab oil-test kit prototypes demonstrated the r...

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PLab 3 Gain Correction

by stoft almost 3 years ago | 37 | 3,535 | 5

In a previous note ( http://publiclab.org/notes/stoft/02-25-2015/plab-spectrometer-gain-correcti...

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PLab 3 Spectrometer Upgrade Prototype

by stoft almost 3 years ago | 11 | 4,312 | 4

Abstract Even though the ink is barely dry on the new manuals for the PLab 3.0 Spectromete...

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CFL Cal Error Explained

by stoft almost 3 years ago | 3 | 1,753 | 2

The PLab spectrometer can be, and should be, calibrated for wavelength. Presently this can be acc...

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Optimal Slit Width

by stoft almost 3 years ago | 0 | 3,132 | 2

The PLab spectrometers use a thin slit to provide pseudo-collimated light which has been effectiv...

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PLab 3 Sanm Camera Focus

by stoft almost 3 years ago | 0 | 2,095 | 2

There has been continuing discussion about PLab spectrometer camera focus since poor focus can ad...

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PLab Spectrometer Gain-Correction

by stoft almost 3 years ago | 25 | 2,930 | 4

Calibrating the PLab spectrometer for absolute intensity will likely remain a difficult and expen...

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PLab's WebCam (Non)Linearity

by stoft over 3 years ago | 0 | 3,600 | 3

We all know that when looking at the spectrometer's color band, and the associated spectral respo...

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HDR2: Using Over-Exposure to Your Advantage

by stoft almost 4 years ago | 3 | 3,057 | 1

Background Since writing some notes, a while back, on improving dynamic range ( [HDR: In sea...

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HDR: In search of High-er Dynamic Range

by stoft over 4 years ago | 1 | 4,106 | 3

Abstract By adapting the DSLR photography concept of HDR to the webcam spectr...

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In Search of Spectrometer Attenuators

by stoft over 4 years ago | 14 | 3,437 | 1

As referenced in a previous Note: http://publiclab.org/notes/stoft/05-14-2013/in-search-of-spectr...

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In Search of Spectrometer Measurement and Calibration

by stoft over 4 years ago | 6 | 4,601 | 3

I admit, just viewing a CFL spectrum with a webcam and a bit of cardboard was a kick but then the...

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Spectrometer focus

by stoft over 4 years ago | 16 | 6,007 | 5

An area of concern for me in rebuilding my spectrometer has been the camera focus. The spectromet...

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What mechanical specs can and should PLab spectrometers meet?

stoft asked about about 1 year ago

Answers by stoft

answered on Sep 15, 2016 0

answered on Sep 16, 2016 0

answered on Sep 16, 2016 1

answered on Sep 20, 2016 0

answered on Sep 20, 2016 0

answered on Oct 01, 2016 0

Show all 11 answers »

View these maps <a href='//mapknitter.org/profile/stoft'>at MapKnitter.org &raquo;</a>

Title Creation date Image

stoft was awarded the Basic Barnstar by warren for their work published in PLab Spectrometer Gain-Correction.


stoft was awarded the Basic Barnstar by warren for their work published in PLab 3 Gain Correction.


stoft was awarded the Basic Barnstar by liz for their work published in PLab 3 Spectrometer Upgrade Prototype.


stoft was awarded the Basic Barnstar by dhaffnersr for their work published in Optimal Slit Width.


stoft was awarded the Empiricism Barnstar by warren for their work published in PLab 3 Sanm Camera Focus.


stoft was awarded the Empiricism Barnstar by warren for their work published in OTK Proto3 Analysis.


stoft was awarded the Empiricism Barnstar by warren for their work published in Spectrometer Noise.


stoft was awarded the Empiricism Barnstar by Matej for their work published in OTK Proto3.


stoft was awarded the Photo Documentation Barnstar by dhaffnersr for their work published in OTK Proto3.


stoft was awarded the Photo Documentation Barnstar by dhaffnersr for their work published in CFL Selection.