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Oh, this is even more interesting after looking into it (see this diagram from another site): https://www.dpreview.com/news/7542036825/french-startup-is-prepari
by supernova87a 6y ago
Oh, this is even more interesting after looking into it (see this diagram from another site): https://www.dpreview.com/news/7542036825/french-startup-is-preparing-its-curved-cmos-image-sensor-for-mass-production https://www.dpreview.com/news/7542036825/french-startup-is-p...
The curvature goes in the opposite direction of what I would have thought. I would've thought the orientation of the curve was in the sense of maintaining a "constant radius" from the end of the lens stack. (exit pupil?) I.e. the curve helps bring in the distant parts of the sensor closer and more orthogonal to the light rays.
But the diagram shows the opposite kind of curve! That makes even less intuitive sense to me.
(I can't imagine someone not involved with the company creating this diagram, or it being so wrong and not being caught by some review process? I figure the diagram is legit? Someone drawing ray tracing level details would get it so wrong?)
- bgee 6y agoThe illustration also contradicts the real picture of the sensor. Also from the same DPReview article: "Curved image sensors mimic the human eye", that illustration is not how I thought the retina is shaped.
- m463 6y agoThe image of the sensor held by the fingers looks concave. The illustration with simplified optics shows a convex sensor. Hard to figure it out. I would imagine chromatic abberation and light dropoff is due to flat sensors and concave sensors would help. But I might not understand modern lens design.
- sudosysgen 6y agoIt depends on the lens. Some lenses will more easily want a sensor that curves away, others will prefer a sensor that curves towards them.