NG52 eyepiece reticles, Chalkley point array

Chalkley Point Array - NG52This is used to quickly determine the relationship of components to each other using random sampling. Curtis gives an example of its application, where a researcher may want to see whether or not a certain drug affects the volume proportion of cell types in a given organ. With this graticule the proportion of points lying over the image of one type of component is statistically proportional to the area occupied by that component. The 25 points of the array are placed over the field of view at random, so that a comparison can be made between the number of points touching one type of component with the number touching the other type of component in each viewing. A series of observations will yield an increasingly accurate ratio of the comparative incidence of each type of particle.ReferenceA.S.C. Curtis. Medical and Biological Illustration, Vol. 10. pp 261-266. "Area and Volume Measurements by Random Sampling Methods."

Chalkley Point Array - NG52

This is used to quickly determine the relationship of components to each other using random sampling. Curtis gives an example of its application, where a researcher may want to see whether or not a certain drug affects the volume proportion of cell types in a given organ. With this graticule the proportion of points lying over the image of one type of component is statistically proportional to the area occupied by that component. The 25 points of the array are placed over the field of view at random, so that a comparison can be made between the number of points touching one type of component with the number touching the other type of component in each viewing. A series of observations will yield an increasingly accurate ratio of the comparative incidence of each type of particle.

Reference

A.S.C. Curtis. Medical and Biological Illustration, Vol. 10. pp 261-266. "Area and Volume Measurements by Random Sampling Methods."

Pattern	Description	Diameter	Product
NG52	Chalkley point array. Surface chrome image.	16mm	EMS68034-16
		19mm	EMS68034-19
		21mm	EMS68034-21

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Code	Title	Diameter	Pack Size	Availability	Price
EMS68034-16	NG52 eyepiece reticles, Chalkley point array	16mm	Each	See above	$379.00 AUD

EMS68034-19	NG52 eyepiece reticles, Chalkley point array	19mm	Each	See above	$379.00 AUD

EMS68034-21	NG52 eyepiece reticles, Chalkley point array	21mm	Each	See above	$379.00 AUD