I need to study the surface of nylon-6 blank fibres with a thickness of nearly 40 micrometre. I work in optics lab with many optical components such as beam splitters, lenses, mirrors, etc; can I build a system to study the topology of this fibre?
closed as off-topic by Gert, Jon Custer, Yashas, GiorgioP, ZeroTheHero Mar 22 at 2:57
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "This question appears to be about engineering, which is the application of scientific knowledge to construct a solution to solve a specific problem. As such, it is off topic for this site, which deals with the science, whether theoretical or experimental, of how the natural world works. For more information, see this meta post." – Gert, Jon Custer, Yashas, GiorgioP
Here are some suggestions:
Study the surfaces using a microscope, to get a direct sense of the 3D structure of your samples. This can work if the features you are analyzing are larger than about 1/2 the wavelength of the illuminating light. A confocal microscope can give you better resolution. Adjusting the focal plane up and down can help determine where features are in the vertical direction.
Using the same samples, illuminate the samples with a narrow collimated laser beam. Using a high-quality lens, focus the scattered light to form the optical Fourier transform of the scattered light. The light pattern should correspond to the sizes and arrangements of the fibers/features in the samples. Use a polarized laser beam and view the scattered light pattern through a polarizing filter to get additional information. Different laser wavelengths may give you somewhat different results, providing yet more information.
Consider using a process called "ptychography". It is related to #2 above, but can be used to obtain extremely detailed images without lenses. Variations on the technique can be used to obtain 3D images of microstructures.