High ISO camera concept

[Alliumnsk]

Hi. I'm just bored Sony fanboy and I decided to share my idea how they could make high ISO camera. With colorsplitter, of course! Prisms are ruled out since they will not work with existing lenses, but mirrors can.

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[Golem]

You don't need filters on the green sensor.

The mirror can be dichroic, passing only

green and reflecting the red and blue off

to the R&B arrayed sensor.

 

With your sketched idea, you use a full

spectrum semi-mirror which robs light and

then you further filter the light at both

sensors, and acoarst those filters cost

some light.

 

A dichro mirror robs nothing. It passes

ALL the green [and ONLY green] thru to

the green sensor. There is still a cost

[of light] at the blue-red array, but

hey, no free lunch, right ?

 

Now, if another dichro mirror splits the

R&B into separate red and blue paths for

two sensors [without filter arrays] then

you approach the land of free lunches.

 

See, filter arrays absorb light [bad] :-(

But dichroic beam splitters just divide

and redirect it, virtually lossless, at

least compared to filters. Still bored ?

 

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[Alliumnsk]

There is not enough space to fit third FF sensor. Moreover, the main signal is green anyway. Even with red&blue partially filtered, it still about 1 stop better than bayer. Green sensor might be further optimized as it being monochromatic, it doesn't need to prevent colorshift and pixel crosstalk as much as CFA sensor needs. Better pixel binning might be possible.

[Golem]

Not enuf space ?

 

You are retrofitting this into an existing camera ?

 

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[Guest all8]

Bigger problem is power consumption ... need more room for battery.

 

Apparently its been done already: https://en.wikipedia.org/wiki/Three-CCD_camera

 

But it would be much easier to just smoke some Fuji Grass and go Organic to get that extra Stop of photographic utopia.

[Golem]

Bigger problem is power consumption ... need more room for battery.

 

Apparently its been done already: https://en.wikipedia.org/wiki/Three-CCD_camera

Yes it's been done already. At zero power

consumption. Acoarst it wasn't digital. But

digital is just "electric film". The original

version, however did not use film, either ....

 

It used glass plates [pre-film]. It was that

long ago. It was exactly the same device as

your linked 3-ccd camera except, since the

inventor searched high and low for ccds but

this was very difficult, cuz there was not yet

any eBay or Amazon, he just decided he

would use glass plates instead :-)

 

http://camera-wiki.org/wiki/Three-color_camera

 

Example of very early application:

 

http://sites.utoronto.ca/tolstoy/colorportrait.htm

 

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[Alliumnsk]

Not enuf space ?

 

You are retrofitting this into an existing camera ?

 

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To a new camera to work with A-mount or other SLR lenses.

[Alliumnsk]

But it would be much easier to just smoke some Fuji Grass and go Organic to get that extra Stop of photographic utopia.

You're talking about non-existing (yet) sensor which won't give 1 stop improvement.

I am very frustrated because almost everyone is craving for higher ISOs but doesn't want to know how this might be done with existing sensors.

[Golem]

You're talking about non-existing (yet) sensor

which won't give 1 stop improvement.

I am very frustrated because almost everyone is

craving for higher ISOs but doesn't want to know

how this might be done with existing sensors.

Simple.

 

You mount three M-Leica Monochromes reeeally

close together and put the respective separation

filters on each one. Then you just merge in post.

 

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