List of spectrometers: to measure CRI, etc

Flashlight Modding and DIY Parts
11

No that’s why I mentioned only i1 pro.

12

I love that it’s even specifically in the part I quoted :person_facepalming:

13

Are you sure about that? Asensetek doesn't have a website anymore..

Thanks @bob mcbob

14

I’m not sure they ever did — I bought through Allied Scientific. I can confirm that their SpectrumGenius cloud service is alive and well.

15

Well, their documentation mentions the website, but if I go there, it's gone. Other websites mentioning Asensetek also link to that same website...

I hope I'm wrong though..

16

I hope so too! It’s a great product. My guess (hope) is that they were acquired and that result in website changes. But I can’t find anything about it online one way or the other.

17

I think the new company name is Spectrum Genius? https://spectrumgenius.com/website/about-us

If you look at their (Spectrum genius) address details, they are named Asensetek Canada Inc, and interestingly enough, their email is from alliedscientificpro.com.

Also, here is a mention from 2019, that Asensetek might have gone broke: https://ledgardener.com/forum/viewtopic.php?t=4105

Edit:

Update:

I just reached out to them, and yes, these are (again) still in business, so less worry.

18

Found a few more, named GL Spectrolux

https://gloptic.com/products/gl-spectrolux/

The website mentions: Budget-Friendly.. but they cost north of $3000 lol

19

And the ThunderOptics spectrometer.. A device of only $114

But not 100% sure it can measure CRI.. but that's not 100% clear

https://thunderoptics.fr/product/mini/

See more info from Unheard: List of spectrometers: to measure CRI, etc - #22 by Unheard

20

Hi everyone,

First time posting here but I’m wondering if anyone would be able to help. I’ve seen some documentation here where some people are using a ColorMunki Photo, some people are using an i1Pro, and some people are using CT&A.

I would like to buy the equipment needed to perform some measurements on various LED light sources I have acquired.

I’ve found the following:
Colormunki Photo is available used for about 150 USD on eBay or so. Seems to work with Argyll CMS and this GitHub which seems to process the files.
i1Pro v1 (can also get a EFI E2000 which appears to be the same thing for 170USD) seems very old and appears to be supported by CT&A, which has a free version but I’m not sure if that is sufficient to generate the reports I see here; unknown if EFI version can be used with CT&A;
i1Pro v2 seems to extend the measurement brightness range of V1. More expensive.

I’m wondering what would be the minimum viable way to acquire these and perhaps an integrating sphere for <500 USD. Bonus if it would work for calibrating monitors as well.

Would anyone have some recommendations for where to start?

Thanks!

1 Thank
21

Welcome on BLF !

22

Does anyone own this thing and can say something about it?

Edit: I’ve contacted the manufacturer and asked a few questions/requested the manual. Here’s the answer in my words:

  • the device needs to be calibrated and is not very precise

  • data cannot be exported (though I saw a video in which someone did exactly this).

23

Thanks for the update. That is very helpful.

24

Added the Everfine I found today:
Everfine SFIM-300 : http://www.everfine.cn/en/productsinfo.php?cid=10&id=301

1 Thank
25

I’m looking for a spectrometer that at least has the same functionality as the cheap Opple devices, but accurate (CCT, CRI, Duv , R9 and flicker).

Are the Hopoocolor ones reliable and accurate out of the box? Or asked a different way, what would a second-hand Sekonic give me over the Hopoocolor?

26

Thunder optics has a few other ones too, what are they like?

27

I bought a xrite i1Display Studio from eBay and downloaded the Argyll command line tools.

OK, I’m lost.

Which tool allows me to measure flashlights for CRI, CCT and all that fun stuff?

28

The display studio is a colorimeter not a spectrophotometer, it can only measure the CCT/duv.
Once installed (driver and added the PATH enviroment variable) we use spotread ambiant measurement with the i1 Studio/colormunki photo , I’m guessing it’s the same with the colorimeter.

spotread -a -x -s -H i what i run but -s and -H will do nothing with a colorimeter.

29

Should it be removed from the top list then? I feel like I bought this expecting something else.

30

Well the i1 Display Studio isn’t in the list, the i1 Studio is and it is a spectrophotometer. Their naming is terrible that’s for sure.

2 Thanks