Specifications & Operation Instructions
1) Range of PD adjustments:
PD of both eyes |
48 ~ 80mm |
Left or Right PD |
24 ~ 40mm |
Minimum graduated value |
1mm |
2) Dividing disc axial graduation
Left dividing disc |
1200 ~ 00 ~ 1350 |
Right dividing disc |
450 ~ 1800 ~ 600 |
Axial graduation increases along the lens frame axis counter clockwise, and the graduated distance is 50. |
3) Inner diameter of lens frame : F32.5mm
4) Number of lens which can be inserted into left or right lens frame simultaneously: 4 pieces
5) Degree of lens rotating around optical axis in the lens frame: 3600
6) Nonparallelism between lens´ optical axis and lens frame's geometric axis: ≤2.50
7) Non-concentricity between lens´ optical center and lens frame geometric center:≤0.5mm
8) Displacement of lens in relation to position of lens frame geometric center:≤0.3mm
9) Range of nose rest adjustment
Length |
0 ~ 14mm; |
Angle |
0 degree ~ 30 degree |
10) Range of left or right lens frame leg´s length adjustment: 98 ~ 135mm
11) Maximum interval between left and right lens frame legs: 200mm