Public Lab Research note

Write a research note
Post research

Browse the Public Lab Wiki »

Recent tags for dhaffnersr

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 12 months ago | 1 | 553 | 0

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

Read more

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

by dhaffnersr 12 months ago | 1 | 375 | 0

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

Read more

A Near Perfect CFL (compact fluorescent light) Calibration

by dhaffnersr 12 months ago | 0 | 392 | 1

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

Read more

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

by dhaffnersr 12 months ago | 0 | 316 | 0

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

Read more

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

by dhaffnersr 12 months ago | 0 | 406 | 0

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

Read more

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

by dhaffnersr 12 months ago | 1 | 394 | 0

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

Read more

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

by dhaffnersr 12 months ago | 0 | 393 | 0

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

Read more

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

by dhaffnersr 12 months ago | 2 | 411 | 0

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

Read more

CFL and LED Bulb Study Section III

by dhaffnersr 12 months ago | 0 | 496 | 0

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

Read more

Build Instructions For The DH 4.0 v4 Spectrometer

by dhaffnersr 12 months ago | 0 | 543 | 0

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

Read more

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

by dhaffnersr 12 months ago | 0 | 512 | 1

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

Read more

CFL Spectral Irradiance Study using Spekwin32

by dhaffnersr 12 months ago | 1 | 514 | 1

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

Read more

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

by dhaffnersr 12 months ago | 3 | 614 | 1

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

Read more

Effects of Solvents on Fluorescence of Biological Dyes

by dhaffnersr 12 months ago | 0 | 799 | 0

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

Read more

Final Data Analysis for My New 0.11mm Entrance Slit Design

by dhaffnersr about 1 year ago | 0 | 420 | 0

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

Read more

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

by dhaffnersr about 1 year ago | 0 | 392 | 0

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

Read more

Comparison Values for 0.09mm and 0.11mm Slit Width

by dhaffnersr about 1 year ago | 0 | 400 | 0

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

Read more

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

by dhaffnersr about 1 year ago | 1 | 432 | 0

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

Read more

Microscopic View of Public Lab's Acetate film slits

by dhaffnersr about 1 year ago | 3 | 384 | 0

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

Read more

UV Laser Pointer and Green Laser Spectra Through 1 Quartz Cuvette

by dhaffnersr about 1 year ago | 0 | 558 | 0

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

Read more

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

by dhaffnersr about 1 year ago | 2 | 466 | 0

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

Read more

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

by dhaffnersr about 1 year ago | 1 | 440 | 0

[](//i.public...

Read more

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

by dhaffnersr about 1 year ago | 0 | 570 | 0

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

Read more

Complete Redesign of Entrance Slit

by dhaffnersr about 1 year ago | 0 | 597 | 1

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

Read more

Build Instructions For The DH 4.0 v4 Spectrometer

by dhaffnersr about 1 year ago | 2 | 1,105 | 1

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

Read more

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

by dhaffnersr about 1 year ago | 0 | 572 | 0

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

Read more

DH 4.0 v4 Spectrometer Build Illustrations, Modifications and Specifications

by dhaffnersr about 1 year ago | 0 | 700 | 2

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

Read more

Chemical Analysis For Kirkland (organic) Extra Virgin Olive Oil

by dhaffnersr about 1 year ago | 2 | 724 | 0

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

Read more

Proving The Reliability Of The DH 4.0 v4 Spectrometer

by dhaffnersr about 1 year ago | 0 | 551 | 1

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

Read more

Absorption spectra of extra virgin olive oil-Supplementation part III

by dhaffnersr about 1 year ago | 0 | 626 | 1

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

Read more