willie_901
Veteran
Roland,
You are correct, my post was oversimplified.
But the point remains that image aesthetics of CCD sensors can vary as much as CMOS sensors.
I am not implying the data you shared is inaccurate. I'm only saying each sensor bed (just the pinned-diode bits) has a different response). This is no different than saying the passive color-filter array and IR materials' properties have a profound impact on image aesthetics.
The M monochrome response is not perfectly linear... but Leica considers it to be panchromatic.(link).
In general, the physical housing of the pinned-diodes does affect frequency response. A lot of research has gone into how to minimize the those variables. Differences in pinned-diode semi-conductor doping chemistry are also relevant.
But in the end both CCDD and CMOS sensor beds just count photons using pinned-diodes. The major differences (ignoring the CFA and IR filter in front of the sensor bed) involves the signal processing after the shutter closes.
More technical informatin is found here (link) and here.
You are correct, my post was oversimplified.
- The basic wavelength - energy dependency is constant for all photo-diodes. So this factor cancels out.
- Beyond the unavoidable, constant frequency dependence, the total pinned-diode frequency response depends on may factors but few of these are related to CCD vs CMOS.
But the point remains that image aesthetics of CCD sensors can vary as much as CMOS sensors.
I am not implying the data you shared is inaccurate. I'm only saying each sensor bed (just the pinned-diode bits) has a different response). This is no different than saying the passive color-filter array and IR materials' properties have a profound impact on image aesthetics.
The M monochrome response is not perfectly linear... but Leica considers it to be panchromatic.(link).
In general, the physical housing of the pinned-diodes does affect frequency response. A lot of research has gone into how to minimize the those variables. Differences in pinned-diode semi-conductor doping chemistry are also relevant.
But in the end both CCDD and CMOS sensor beds just count photons using pinned-diodes. The major differences (ignoring the CFA and IR filter in front of the sensor bed) involves the signal processing after the shutter closes.
More technical informatin is found here (link) and here.
