Tomey CASIA2 User Manual

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4. TECHNICAL INFORMATION
“Measurement principles”
This instrument adopts the Fourier domain method that splits the light from the light
source and directs that light toward the reference mirror (reference light) and toward the
patient’s eye (measurement light) using the interferometer at the head of the
measurement unit, and then matches the reflected light and detects interference signals
of each waveform (spectrum interference signal).
Spectrum interference signals change according to the difference in time required for
the reference light and measurement light to reach the detector. Using this change, the
instrument measures the depth of the patient’s eye. Specifically, the instrument
calculates the difference in time needed for the reference light and measurement light
to reach the detector and converts the result to the depth data by applying a Fourier
conversion to the spectrum of interference signals.

Tomey CASIA2 Specifications

General

Brand	Tomey
Model	CASIA2
Category	Medical Equipment
Language	English