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Imaging Biological Samples with Optical Microscopy

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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes

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Published on: May 23, 2017

Computational-sampling-moiré-based on-machine alignment for freeform optics.

Vinod Mishra, Nitin Dubey, M P Singh

|May 24, 2023

Summary

This summary is machine-generated.

A new computational sampling moiré technique precisely aligns freeform optics during manufacturing and metrology. This method achieves near-interferometry precision for advanced optical surface fabrication.

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Published on: January 25, 2021

Area of Science:

Optical Engineering
Metrology
Nanofabrication

Background:

Freeform optical surfaces are highly sensitive to misalignments during manufacturing and characterization.
Precise alignment is critical for achieving desired optical performance and accuracy.

Purpose of the Study:

To develop a novel computational sampling moiré technique for precise alignment of freeform optics.
To enable high-accuracy fabrication and metrology of complex optical surfaces.

Main Methods:

Combining computational sampling moiré with phase extraction.
Implementing a simple and compact optical configuration.
Utilizing iterative manufacturing with computational data processing.

Main Results:

Achieved near-interferometry-level precision in alignment.
Demonstrated iterative manufacturing of freeform optical surfaces.
Attained a final-form accuracy of approximately 180 nm.

Conclusions:

The developed technique offers a robust solution for precise alignment in freeform optics.
This technology is applicable to industrial manufacturing and metrology equipment.
Enables high-precision fabrication of advanced optical components.