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Nanometer Scale/Meter?

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Here's a great little spectroscope that will do exactly what you want for $40. Worth every penny. It has a very accurate scale you can directly read down to the nanometer.

Amazon.com: Project Star Spectroscope; Handheld: Industrial & Scientific
Freekin' amazing. I have been wanting one. But as others, thought it would cost $k's. Never even bothered to look at prices of any. Here's one that works well for $40. :thanks:
 

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I just noticed this thread and was looking to buy that same spectrometer. I know that BobH already recommended it, but I need some second opinions on whether it is a good buy or not. Please let me know if you think so.
 

phoenix77

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I recently purchased the s-m (spectrometer) that BOB has. Here's my opinion of the unit if you're interested. 1st, it's a little bit tricky learning how to use the s-m, meaning that it takes a little bit of looking around through the view port till you figure out just the correct way to hold the unit, & what place to look at inside of it. 2nd, I'm 55 & have been wearing bifocals for ~15 years now, but even with my glasses on, those darn numbers on the nm. scale inside are too damn small for ME to read, especially the graduation bars between the numbers. It's supposed to look like this,
500llllllllll600llllllllll700, but I can barely read the numbers, & forget about the bar graduations. They just look like a blur to me. I think that I may have come up with a solution for my poor vision though. I was with my wife at HOBBY LOBBY the other day, & while she was lookin' at the crafting stuff, I was wandering around, & like I always do when I go with her to the craft supply stores, I was keepin' an eye out for anything that I might be able to use for my laser hobby. If you've ever been in one of those stores, you know that they have all kinds of things suitable for use in our hobby, & usually for a pretty cheap price too. Things like a 2 pc. set of ultra fine tweezers, 1 straight tip, the other curved, or plier sets that have the jaws fitted with nylon inserts so you can grip & bend something without scratching it. Anyway, back to the topic. I came across this little item called a MagniCard. It's a credit card size magnifier, with a 2 X FRESNEL LENS, equipped with a bright LED light that operates with a slim push-button. It's made for the geriatric crowd, (Gawd, I'm old), to keep in their purse or wallet, to read the fine print on menus, Rx bottles, etc. It runs on 2 LithiumCR2016 wafer batteries. When I saw that, I thought, man, all I have to do is cut a slot for that MagniCard, just big enough to let it slip into place at the correct place to magnify all those tiny numbers & bars to make them large enough to read, & it has a light on it to boot. Right now I'm trying to figure out the correct distance from the graph to install that MagniCard, so the graph is nice & clear for reading, but I think once I get that figured out, I'll have the problem licked. After I get the MagniCard installed, I'll post back with the (hopefully good) results. I don't know if a person with 20/20 vision can see the graph good enough to discern a nm reading like 593.5, but I'm pretty sure I'll be able to see good enough to count the bar graduations on the graph after installing that MagniCard. (I hope) This still remains to be seen though. I'll be sure to post my results. rob
 
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Wow, that sounds like a ton of work just to be able to read it. Can't you just look through a magnifying glass?
 

Hemlock_Mike

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I recently got a spectroscope from fleabay for about $100. It uses a grating and can be calibrated to a known line. It appears in the picture as the little double barreled thing near the HeNe PS.

HMike
 

lasersbee

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Gee Rob... that is hard to read all stuck together like that...
I keep loosing my place...:D

Curious if the lens will help...

Jerry
 

MickyP

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Why not just use a finely measured double slit experiment?
If you dont want to spend any money on a spectrometer, a carefully double slit exercise would give you the wavelength results you are looking for.
Google is your friend.
 




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