The fourth one w/o a filter was probably used to take the ambient measurements. This brought back a lot of memories. I used to work for HP and occasionally got to disassemble a competitor's product.
I am still using one of these as a dongle for the HP APS (Advanced Profiling System) on my large format HP Photo Printer. This system is used to profile printer papers on the printer itself. The APS software will not run without the colorimeter plugged into the controlling PC. For monitor profiling, I use the Datacolor Spyder 4 Pro, which has much better hardware and software. Good video Eric!
I used one of them ages ago, calibrated all my monitors with it. Once you have a profile for a particular monitor you can keep transferring the file between systems. Made quite a difference to the colour rendition.
You will never need one till your preferred monitor manufacturer sends you 4 miscalibrated screens in a row. I got the ColorMunki Display. Innards look similar. I think the 4th sensor (which mine does not have AFAIK) is for refresh rate synchronization for CRT/plasma/projector calibration.
leppie I would suspect that the forth sensor was for detecting luminance, as it would probably be possible to recover timing from the individual sensor outputs, and you may not need it as you could use hold the highest sample or use a peak hold circuit if you wanted the peak values. I suspect though that the peak values are not as important as the average emission, so it may use some sort of averaging/integration.
Thanks for the video. I have bought a used "ColorMunki Smile" to calibrate my laptop's and screens (non professional purposes), hardware is similar than the HP Eye-One and I have had curiosity to see how is inside. With DisplayCAL works very fine, I can't say the same about original software.
I've got a similar i1 Display 2, which measures completely wrong luminance and green values after two years in storage. I was curious what electronic component inside of it could be aged so badly. Modern semiconductors still should be OK. Not sure if the light sensing elements (phototransistors?) are prone to aging. I have also noticed a SMD-type tantalum capacitor on the top of the PCB. This can be a good candidate to fail. Thanks for sharing!
Mark Beeunas You're right! I hadn't thought of that. If not for that requirement, steel would undoubtedly have been used regardless of the copper market.
The fourth one w/o a filter was probably used to take the ambient measurements. This brought back a lot of memories. I used to work for HP and occasionally got to disassemble a competitor's product.
I am still using one of these as a dongle for the HP APS (Advanced Profiling System) on my large format HP Photo Printer. This system is used to profile printer papers on the printer itself. The APS software will not run without the colorimeter plugged into the controlling PC.
For monitor profiling, I use the Datacolor Spyder 4 Pro, which has much better hardware and software.
Good video Eric!
+Shaun Merrigan Thanks!
I used one of them ages ago, calibrated all my monitors with it. Once you have a profile for a particular monitor you can keep transferring the file between systems. Made quite a difference to the colour rendition.
You will never need one till your preferred monitor manufacturer sends you 4 miscalibrated screens in a row. I got the ColorMunki Display. Innards look similar. I think the 4th sensor (which mine does not have AFAIK) is for refresh rate synchronization for CRT/plasma/projector calibration.
leppie I would suspect that the forth sensor was for detecting luminance, as it would probably be possible to recover timing from the individual sensor outputs, and you may not need it as you could use hold the highest sample or use a peak hold circuit if you wanted the peak values. I suspect though that the peak values are not as important as the average emission, so it may use some sort of averaging/integration.
Thanks for the video. I have bought a used "ColorMunki Smile" to calibrate my laptop's and screens (non professional purposes), hardware is similar than the HP Eye-One and I have had curiosity to see how is inside.
With DisplayCAL works very fine, I can't say the same about original software.
I think there is different color calibrators for monitors and print media. the ones for monitors is RGB, whereas the ones for printed media are CMY :D
I've got a similar i1 Display 2, which measures completely wrong luminance and green values after two years in storage. I was curious what electronic component inside of it could be aged so badly. Modern semiconductors still should be OK. Not sure if the light sensing elements (phototransistors?) are prone to aging. I have also noticed a SMD-type tantalum capacitor on the top of the PCB. This can be a good candidate to fail.
Thanks for sharing!
Brass being non-ferromagnetic (if I'm using the term correctly) would not foul-up a CRT image.
Cheers,
Mark
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Mark Beeunas You're right! I hadn't thought of that. If not for that requirement, steel would undoubtedly have been used regardless of the copper market.
The funny aqua blue ones might be IR filters.