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Research by dhaffnersr 267 research notes and wiki edits starting over 1 year ago


Laser Calibration (532nm) of New DVD Diffration Grating 4.7 GB

by dhaffnersr 9 months ago | 1 | 529 | 0

I replaced the DVD diffraction grating for my spectrometer in order to get a more balanced...

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Comparing The Ebert CFL Spectral Image To the DH 4.0 v4 CFL Spectral Image

by dhaffnersr 10 months ago | 1 | 361 | 0

[![cfastie_cfl_cal_march_2013_PNG_and_mine__sept_10.png](//i.publiclab.org/system/images/photos/0...

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A Near Perfect CFL (compact fluorescent light) Calibration

by dhaffnersr 10 months ago | 0 | 376 | 1

I had to run another slit width test verification, so I used Plab's spectral workbench 2.0 online...

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Empirical Verification Of Slit Width For The DH4.0 v4 Spectrometer Section II

by dhaffnersr 10 months ago | 0 | 304 | 0

Using my Premeire Professional binocular microscope, I verified my new slit template and d...

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Empirical Verification Of 0.05mm Slit Width of DH4.0 v4 Spectrometer

by dhaffnersr 10 months ago | 0 | 383 | 0

Upon closer scrutiny of my microscopic view of the 0.05mm slit width, I realized that the ...

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0.05mm Slit Gillette Utility Knife Razor Blade design 100X Magnification

by dhaffnersr 10 months ago | 1 | 375 | 0

This is actually a follow up on my previous post on the two laser scans using the new 0.05mm slit...

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New Laser Testing Using a 405nm UV laser Pointer and a 532nm Portable Green Laser

by dhaffnersr 10 months ago | 0 | 377 | 0

I wanted to see just how much more resolution I could squeeze out of this spectrometer, so...

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Microscopic View of Plab Acetate slit and My Gillette razor Blade Open Air Slit

by dhaffnersr 10 months ago | 2 | 397 | 0

Using my Premiere professional binocular microscope (model - 3000,) and a new camera I got for it...

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CFL and LED Bulb Study Section III

by dhaffnersr 10 months ago | 0 | 483 | 0

September, 5 2016 **3 Different LED bulbs and 3 different CFL bulbs from different manufactures...

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Build Instructions For The DH 4.0 v4 Spectrometer

by dhaffnersr 10 months ago | 0 | 515 | 0

[![DH_spectrometer_sept_3_view_2.png](//i.publiclab.org/system/images/photos/000/017/906/lar...

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Spectral Irradiance Study Section ll using The DH4.0v4 Spectrometer

by dhaffnersr 10 months ago | 0 | 497 | 1

This is part two of my investigative study in the spectral radiance and irradiance of vari...

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CFL Spectral Irradiance Study using Spekwin32

by dhaffnersr 10 months ago | 1 | 501 | 1

A CFL (compact fluorescent light,) mimics the solar spectrum by super heating an element s...

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Resolution Test Using 532nm Laser and 405nm UV Laser Pointer

by dhaffnersr 10 months ago | 3 | 596 | 1

Back in June of this year, Dave @Stoft helped me out considerably by explaining the princi...

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Effects of Solvents on Fluorescence of Biological Dyes

by dhaffnersr 10 months ago | 0 | 744 | 0

Author David H Haffner Sr. 08/24/2016_ Abstract Staining is an auxiliary techni...

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Final Data Analysis for My New 0.11mm Entrance Slit Design

by dhaffnersr 10 months ago | 0 | 406 | 0

Abstract This is the final data analysis for my new 0.11mm slit design. I used Eosin Y as ...

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Special Scan - Sweet Wyoming Crude Oil 2D EEM Analysis of 0.11mm Slit Width

by dhaffnersr 10 months ago | 0 | 380 | 0

**Here is the first 2 plots illustrating the removal of the 1st and 2nd order Rayleigh pea...

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Comparison Values for 0.09mm and 0.11mm Slit Width

by dhaffnersr 10 months ago | 0 | 385 | 0

Here is the data for the second part of my comparison of the 0.09mm acetate film strip and the 0....

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EEM 2D Spectrums Showing Evidence of Attenuation from Imperfections in Acetate Film Strips

by dhaffnersr 10 months ago | 1 | 420 | 0

This is part 2 from my previous research post on **Microscopic View of Public Lab's Acetate film ...

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Microscopic View of Public Lab's Acetate film slits

by dhaffnersr 10 months ago | 3 | 365 | 0

I have wanted to do this for awhile now, and finally got around to it and I am glad I did, I took...

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UV Laser Pointer and Green Laser Spectra Through 1 Quartz Cuvette

by dhaffnersr 10 months ago | 0 | 540 | 0

I wanted to test the resolution of my 0.09mm slit width, so what better way to do that t...

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Question: Is Global Warming primarily man-made or a natural occurring phenomena?

by dhaffnersr 10 months ago | 2 | 452 | 0

My personal opinion on this subject is that, there has always been warming and cooling trends on ...

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Carbol Fuchsin Doped with Lugol’s Iodine Solution AUG 13 2016

by dhaffnersr 10 months ago | 1 | 422 | 0

[](//i.public...

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SNR Data for Eosin Y Study on 8/10/2016

by dhaffnersr 11 months ago | 0 | 553 | 0

Eosin is a name of several fluorescent acidic compounds which bind to and form salts with ...

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Complete Redesign of Entrance Slit

by dhaffnersr 11 months ago | 0 | 579 | 1

I have been also working on a far more stable entrance slit design and decided to include it with...

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Build Instructions For The DH 4.0 v4 Spectrometer

by dhaffnersr 11 months ago | 2 | 1,063 | 1

**Here are the step by step instructions for building the spectrometer that I am using at this mo...

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Validating The DH 4.0 v4 Spectrometer using - MALACHITE GREEN (Oxalate)

by dhaffnersr 11 months ago | 0 | 556 | 0

Here is an excerpt from a study done by The National Center for Biotechnology Information:...

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DH 4.0 v4 Spectrometer Build Illustrations, Modifications and Specifications

by dhaffnersr 11 months ago | 0 | 679 | 2

Measurements between the slit to cmos camera eye are not as critical, as precise alignment o...

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Chemical Analysis For Kirkland (organic) Extra Virgin Olive Oil

by dhaffnersr 11 months ago | 2 | 690 | 0

The major fatty acids in olive oil, triacylglycerols are: Oleic Acid (C18:1), a mon...

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Proving The Reliability Of The DH 4.0 v4 Spectrometer

by dhaffnersr 11 months ago | 0 | 534 | 1

Fluorescein Sodium Although commonly referred to as fluorescein, the dye used for fluor...

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Absorption spectra of extra virgin olive oil-Supplementation part III

by dhaffnersr 11 months ago | 0 | 604 | 1

Sample preparation was done with 1 plastic disposable UV cuvette (220nm - 2200nm) and filled t...

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