Re: "Colorimeter"

On 5/19/2025 1:33 PM, Lasse Langwadt wrote:

On 5/18/25 21:45, Don Y wrote:

On 5/18/2025 6:13 AM, Lasse Langwadt wrote:

On 5/17/25 23:03, Martin Brown wrote:

>
If you are serious about doing this right then a 2D CCD sensor and a prism hires grating combo at right angles will allow you to quantify the entire visible spectrum at ultra high resolution.

>
use a CD https://youtu.be/EoAZ-u6hn6g?si=Mv-DfJ5swtq2-j1X&t=98  :)
>
eons ago we used some CCDs as detectors for X-ray fluorescence, some had weird formats like 1024x64 pixels so I assume they were really made for spectroscopy

>
As mentioned elsewhere, how do they fare when light is shining directly on the
sensor?  How do you keep it from saturating -- dark lens to attenuate the signal?

 or a shutter to limit the time light hits the sensor

There's still a limit as to the peak intensity that a sensor can
tolerate.  And, gating the light (instead of attenuating it)
means there is no signal when the source is gated off.
Fine if you are making a device with a button that says "measure now".
But, if you expect to be able to collect data at any time, you
want to be sure data is available.