Main Technical Indicators
1.Pupil distance adjustment range: binocular pupil distance range:54-70mm; the minimum scale value:1mm.
2.Axis scale:left and right scale:165°~0°~180°~25°.The axis scale increases anticlockwise along the axis of the frame, and the marking interval is 5°.
3.Effective internal aperture of frame:Φ8mm.
4.The number of lenses that can be inserted into the left and right frames:4 (the front is 3 and the rear is 1).
5.Rotation degree of optical axis of lens in inner ring of frame:360 °.
6.The nonparallelism between the optical axis of the lens and the geometric axis of the frame: ≤2.5 °.
7.The difference between the optical center and the geometric center of the lens:≤5mm.
8.Displacement of the lens relative to the geometric center of the frame:≤0.3mm.
9.Adjustment range of nose pad:the length can be increased by 2mm; width:2mm; angle:0°~ 180°.
10.Adjustable length range of the left and right frame leg:140~170mm.