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Related Experiment Video

Updated: Jun 19, 2026

$On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature$

On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature

Published on: March 11, 2022

A NEW FORM OF DIFFRACTOMETER.

R T Cox¹, E Ponder

¹The Biological Laboratory, Cold Spring Harbor, Long Island.

The Journal of General Physiology

|October 30, 2009

Summary

This summary is machine-generated.

A new diffractometer accurately measures red blood cell size using light diffraction patterns. This simple, cost-effective method provides reliable radius and volume calculations comparable to existing techniques.

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Area of Science:

Biophysics
Optical Physics
Hematology

Background:

Accurate measurement of cell size is crucial in hematology and biophysics.
Existing methods for determining cell dimensions can be complex or costly.

Purpose of the Study:

To describe a simple, effective diffractometer for measuring the size of red blood cells.
To validate the accuracy of this new method against established techniques.

Main Methods:

Utilizing monochromatic light focused through a pinhole to create parallel beams.
Passing light through a red cell sample and capturing diffraction patterns.
Analyzing diffraction patterns using a simplified microphotometer to find key points.

Main Results:

The diffractometer successfully generated measurable diffraction patterns.
The positions of the first minimum and maximum in the diffraction patterns were accurately determined.
Calculated red cell radius and volume showed substantial agreement with standard methods.

Conclusions:

The described simple diffractometer is a viable tool for accurate red blood cell size determination.
This method offers a cost-effective and straightforward alternative for measuring cell dimensions.