PD180, PD Meter is a precion optical instrument used to measure distance between pupils in the process of optometry for spectacles
Characteristics
This device is a scientifíc and reasonable design, consisting of measurement system, optical system, ESS and Computer software system into a whole.
- Using mechanical hairspring to level at the reflecting point of human cornea to realize the consecutive measurement. It features direct point-sampling and high accuracy of orientation.
- Adopting high-precision line-shaped sensors, advanced intellectualizedelectronic systems and digital display which allow the testing results more visible, legible and accurate.
- The design of LED lamp-house and low-power consumption ensurcthe prolonged Service life of batteries.
- It offers thc+2.00D compcnsation for the visual dcgrec.
- The brightness of LED lamp-house is adjustable.
Main Technical Indexes
| Effective range of measurement: |
- Binocular pupillary distance: 45-82 mm
- Left or right pupillary distance: 22.5-41 mm
|
| 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 |
- Voltage: DC 3.7V
- Specification: lithium battery
- Quantity: 1 pieces
|
| 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 |
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