Optical Optometric multi-function frame professional trial frame

Description

DESCRIPTION
Multi-function Trial Frame :
for eyesight examining in spectacles shops,department of ophthalmology in hospitals,schools and enterprises.
* Main technical:
1.Range of PD adjustments: PD of both eyes: 48-80mm,  Left or right PD: 24-40mm,  Minimum calibration value: 1mm
2.Frame adjustable length : 35mm
3.Nose pad adjustable angles :360°
4.Axial calibration on each disc: Left disc: 120.0.135.,  Right disc: 45.180.60.,
Axial calibration increase along the lens frame axis counter clockwise ,and the calibration distance is 5..
5.Inner diameter of lens frame:φ32.5mm
6.Number of lens which can be inserted into left or right lens frame simultaneously:4 pieces
7.Degree of lens rotating around optical axis in the lens frame::360°
8.Nonparallelism between lens'optical axis and lens frame's geometric axis:≤ 2.5.
9.Non-concentricity between lens'optical center and lens frame geometric center:≤0.5mm
10.Displacement of lens in relation to position of lens frame geometric center:≤0.3mm
11.Range of nose pad adjustment:length:0-14mm;Angle:0.30.
12.Range of left or right lens frame leg'length adjustment:98~135mm
13.Maximum interval between left and right lens frame legs:200mm
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