Tomey SP-100 - Measurement Principle

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1.4 Outline of Measurement Principle
1.4 Outline of Measurement Principle
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 After taking measurement, the oscillator is not emitting
ultrasound waves.
The SP-100 is designed for pachymeter or corneal thickness measurement by
using ultrasound transducer, built in Pachymeter probe.
z SP-100 emits the ultrasound from the Pachymeter probe and the
probe also receives the ultrasound reflected by surface between
corneal posterior face and anterior chamber.
z SP-100 measures the period of time from emitting ultrasound to
receiving the same ultrasound, reflected by corneal posterior part.
Applying a calculation formula shown below, corneal thickness
can be calculated.
L = ———
Where, L: Corneal Thickness
V: Converted sound velocity
(Ultrasound Velocity through cornea)
T: Measured time (Ultrasound transmission
time between emitting and receiving)
z This instrument is powered by rechargeable battery or AC power
adapter. Even when the battery power is running short, SP-100
can perform measurements, while charging the battery, by plug-
ging to AC power adapter.
z This instrument is designed to take corneal thickness measure-
ment automatically, when the probe is applied to cornea properly.
z This instrument is capable of sending and receiving patient infor-
mation and measurement data between the external equipment
through the serial communication port. (Additional cable must be
used, when using this function)
V · t
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