Optical measurement of 1 micron dimensional changes
Optical measurement of 1 micron dimensional changes
(OP)
Which system will give me 1 micron (0.001mm) sensitivity, when using optics to measure dimension changes in tissue (biomedical) samples. I was thinking of using linear arrays but the minimum pixel size I can find is 0.004mm. I had thought of staggering 2 or 3 of these but this would be to wide for my sample length. Does any one know if masked shadow sensors would do this resolution?





RE: Optical measurement of 1 micron dimensional changes
Resolution is a function of both the image array and the optical system. You will not find detectors much smaller than you have listed, but you can change your optical system to increase the magnification (or is that out of the question?).
There are plenty of other solutions, but they depend on the specifics of your application (signal level, temporal resolution, etc.). For example, you can scan a single linear array across your sample (requiring a lot of control and timing in the scan and acquisition).
I guess by "masked shadow sensor" you mean what I would call a "shadow mask." If you have tons of signal to throw away, you can use such a thing. From what you describe, I think a change in optical magnification would be more appropriate.
CV
RE: Optical measurement of 1 micron dimensional changes
Maybe you should inform about special microscopy systems working with effects like interferometry, with laserlights (UV-range is usual for biomedical applications??) or similar things.
Good luck!
RE: Optical measurement of 1 micron dimensional changes
RE: Optical measurement of 1 micron dimensional changes
RE: Optical measurement of 1 micron dimensional changes