Some authors (namely Ren Ng et al., the founder of the Lytro Light Field Camera company) concluded in their paper on light field cameras that it was not possible to build such a camera in 1992. One reason they give is the lack in precise positioning of a lens array with respect to a sensor.
In their approach they use "simple" high-precision adjustment screws and are able to position the array and sensor with precision of 10 microns. I am wondering if this was not possible in 1992?
Were there no high-precision screws in 1992 that allow at least a positioning accuracy of 30 microns?
The paper by Ng et al. can be found here:
http://stanford.io/1cw9JBn
Thanks for your time!
When I look at the Lytro camera, it reminds me to Hartmann-Shack wavefront sensors...
and for astronomy they are in use since longer than 1992 (for human eye from 1994 with the seminal paper by Liang et al).
Yes but they are not exactly the same, since the distance between the sensor and the microlens array is not as critical as with the light field techniques as far as I know. So this might not be a valid indicator.
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