Public Lab is launching a new 🎈 Mini Balloon & Kite Kit as part of Kickstarter Gold -- take a look!

That user has been placed in moderation.

dhaffnersr 267 research notes and wiki edits

I am 53 years old and a retired Navy veteran, I believe that science is a quest for truth and knowledge, this is its purity, in the basic spirit of that pursuit, I do NOT believe that it is ever acceptable to stifle or silence in any way the creative or intellectual processes involved in that pursuit.

Whether it is in robust debate with peers or colleagues about a specific subject or issue, or just some stranger on the street in general conversation. Intellectual freedom should always be cherished and respected, above all, before ANY type of censorship.

Censorship includes those who would; design a protocol on how you are to speak, what words are acceptable and which one's are not, how you should feel and interact with your fellow human being ie., what type of body language you should use, facial expressions, ect.,

It also includes, believe it or not, what you should write and what you should NOT, when using the internet for communication, example; do not use "humor" when corresponding with others because they cannot "see your facial expressions?"

To me, it is a real shame that the state of our so called, "educated" society would fall prey to such non-sense.

I fought in our military for everyone's freedom, even the freedom to be intellectually and morally corrupt.

Thankfully, I still believe in the United States Of America and what its core stands for, and I for one, will never compromise that.

Baseline comparisons using .09mm slit UV flashlight and UV laser pointer

by dhaffnersr over 1 year ago | 14 | 1,339 | 1

Here is a comparison of baselines thru a .09mm slit using a UV flashlight@395nm and a UV laser po...

Read more

Peak and FWHM data for UV laser baselines

by dhaffnersr over 1 year ago | 2 | 1,607 | 0

UV (405nm) – peaks and FWHM data: Distilled water - BLK wavelength [nm] absorbance FWHM [nm] ...

Read more

addmendum to my post...

by dhaffnersr over 1 year ago | 0 | 882 | 0

<a href="//

Read more

Calibration of a single point reference

by dhaffnersr over 1 year ago | 0 | 633 | 1

Well, what I wanted to do was figure out a way I could take spectral shots of my samples using at...

Read more

Laser Eye Safety!

by dhaffnersr over 1 year ago | 2 | 877 | 3

I just wanted to post up a quick note about the importance of using appropriete eye wear when usi...

Read more

This CFL works the best

by dhaffnersr over 1 year ago | 4 | 1,173 | 2

After a thousand spectral tests, I have found one CFL that I have gotten a quality calibration fi...

Read more

Attempts at Spectrometer stability pics

by dhaffnersr over 1 year ago | 0 | 810 | 1

****Here are some shots of modifications I have made in the last few days to the spectrometer, th...

Read more

Prototype incident light blocker

by dhaffnersr over 1 year ago | 2 | 787 | 2


Read more

Test results today using a .18mm slit

by dhaffnersr over 1 year ago | 0 | 1,084 | 0

Below are some of my test results for today, I replaced the slit that comes with the spectrometer...

Read more

UV scan results analyzed (intitial findings)

by dhaffnersr over 1 year ago | 0 | 515 | 0

I am using a program called Spekwin32 as my spectral analyzing software. [![UV_analy...

Read more

Raman spectrometer in operation (sort of)

by dhaffnersr over 1 year ago | 0 | 1,259 | 3

I am working on a more solid state design in an enclosure using cuvettes which is more a...

Read more

Fluorescence of tabasco sauce

by dhaffnersr over 1 year ago | 0 | 946 | 2

This is a test tube with ethyl alcohol 70% with 60 drops of Tabasco sauce and 1 drop of eosin Y ...

Read more


by dhaffnersr over 1 year ago | 0 | 1,534 | 0

Today I was doing some calibrating for fluorescing gasoline and oil samples If you notice i...

Read more

Recent Pictures of my lab set up.

by dhaffnersr over 1 year ago | 1 | 808 | 1


Read more


by dhaffnersr over 1 year ago | 0 | 564 | 0

This is related to my previous post. I am trying out a new Halogen lamp I bought, I don't kno...

Read more

Raman spectrometer using green laser pointer

by dhaffnersr over 1 year ago | 2 | 1,964 | 4

I want to build a simple but effective Raman spectrometer for analyzing inorganic particulates in...

Read more

View these maps <a href='//'>at &raquo;</a>

Title Creation date Image