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A 3D Culture Method of Spheroids of Embryonic and Liver Zebrafish Cell Lines

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K E Elssner, R Burow, J Grzanna

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Summary

This summary is machine-generated.

This study reviews conventional methods for optical surface sphericity testing, assessing their real-time interferometry suitability. A digital filtering technique is presented to reduce measurement errors like coherent noise.

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Area of Science:

Optical Engineering
Metrology
Interferometry

Background:

Conventional methods for absolute sphericity testing of optical surfaces exist.
Real-time interferometry applications of these methods require further investigation.

Purpose of the Study:

To review and assess conventional sphericity testing methods for real-time interferometry.
To investigate the application of a specific method to phase-stepping interferometry.
To analyze measurement errors and introduce noise reduction techniques.

Main Methods:

Review of conventional absolute sphericity testing techniques.
Application and examination of a chosen method in phase-stepping interferometry.
Analysis of measurement errors, including coherent noise.
Development of a digital spatial filtering technique for noise reduction.

Main Results:

Assessment of conventional methods' suitability for real-time interferometry.
Experimental results of deviation measurements on normal surfaces.
Identification and analysis of measurement errors, particularly coherent noise.
Demonstration of a digital spatial filtering technique for noise diminution.

Conclusions:

Certain conventional methods are suitable for real-time interferometry.
Phase-stepping interferometry can be effectively used for sphericity testing.
Digital spatial filtering significantly reduces coherent noise in measurements.