CMOS OSC Sensors

Jerry Gerber:
I wonder why Sony or other manufacturers of CMOS OSC sensors don't produce a sensor with a Bayer matrix of  LRGB?   If this were available for astronomical cameras, would it decrease the quality differential between OSC and Mono cameras?  

With, say a 32 mega pixel camera, there would be 8 million luminous, red, blue and green pixels.  I would think this would increase the light-gathering sensitivity of the OSC sensor, yes?  No?

Jerry

As our current generation of CMOS sensors we used for astrophotography were primarily developed for the camera/smart phone market, my guess would be that the astronomical market is simply too small to warrant investment in the development and production of such a sensor.

Hi @Jerry Gerber .
I understand your thinking, but it's not how it works. 

Bayer pattern on DSLRs or OSC cameras are devided by R - 25%, G - 50%, B - 25% .As far as I know (I might be wrong on that one), Human eye detects the most of G, and therefore there is more G in cameras too. Now to answer your original question, L filter is luminance. literally just UV/IR blocking filter, that marks the borders from where to where can light come to the sensor. Luminance is a grayscale image of the "RGGB" you now take with the OSC cameras. There are cameras in production, that have an UVIR cut filter integrated, but only so you don't have to have one in your imaging train. They work well on guide scopes, as they're usually achromatic or apochromatic doublet refractors. 

And no. "LRGB" bayer pattern wouldn't increase the light-gathering sensitivity. 
Light gathering usually depends on the aperture of the telescope or telephoto lens. Bigger the aperture, larger is the light gathering. Of course, newer sensors with higher QE and bigger Full well capacity help to receive the light.
To sum up, No there cannot be LRGB bayer pattern, and no, there wouldn't be a bigger light gathering.

Hi @Jerry Gerber .
I understand your thinking, but it's not how it works. 

Bayer pattern on DSLRs or OSC cameras are devided by R - 25%, G - 50%, B - 25% .As far as I know (I might be wrong on that one), Human eye detects the most of G, and therefore there is more G in cameras too. Now to answer your original question, L filter is luminance. literally just UV/IR blocking filter, that marks the borders from where to where can light come to the sensor. Luminance is a grayscale image of the "RGGB" you now take with the OSC cameras. There are cameras in production, that have an UVIR cut filter integrated, but only so you don't have to have one in your imaging train. They work well on guide scopes, as they're usually achromatic or apochromatic doublet refractors. 

And no. "LRGB" bayer pattern wouldn't increase the light-gathering sensitivity. 
Light gathering usually depends on the aperture of the telescope or telephoto lens. Bigger the aperture, larger is the light gathering. Of course, newer sensors with higher QE and bigger Full well capacity help to receive the light.
To sum up, No there cannot be LRGB bayer pattern, and no, there wouldn't be a bigger light gathering.

I think my term "light gathering" was the wrong expression.  I meant a higher QE might be the consequence of using an L filter in the Bayer matrix, but I don't really know.  I know the ZWO ASI2600MC has a IR blocking filter built into it (not UV though), so I think I hear you saying that CMOS OSC already records luminance signal.  

I'll continue to hope that CMOS OSC cameras continue to improve.  I am seeing so many wonderful images taken with OSCs it encourages me to continue to image with it.   I live in not only a Bortle 7 area but also a region that suffers from relentless fog, wind and clouds.  So getting a few hours out of the city is almost mandatory for me and this is what makes the OSC cameras so desirable.  I can't go up to a dark site every night to get 20 hour exposures so I have to work with what I have...