PD180, PD Meter is a precion optical instrument used to measure distance between pupils in the process of optometry for spectacles
This device is a scientifíc and reasonable design, consisting of measurement system, optical system, ESS and Computer software system into a whole.
Effective range of measurement: |
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Absolute valué ofindicated error | 0.5 mm |
Absolute valué of asymmetrical error | ^ 0.5 nn |
Absolute valué of rounding error | 0.5 mm |
Distance of target | 30 cm |
Power source |
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Time for automatic shut-off | About 0.5 minute after stopping operation, or a turn it off manually. |
Size | 22 lmm(L) x 167mm(W) x62mm(H) |
Weight | 0.53kg |