испытание каркас объектива, пробный кадр UB4 XD08

trial lens frame, trial frame UB4 XD08 1.Excellent performance and high measuring accuracy. 2.Actuating cam can fix the direction of astigmatism alxe. 3.The monocular pupilary distance, the height and fore-and-aft angle of the hanger loop are adjustable. 4. The unique global knob makes the operation more comfortable and easy. 5. Five pieces of trial glasses can simulataneously be put in the left and right optical frames respectively. * Features : 1.It can hold 5 pairs of lenses of standard 38mm diameter trial lenses 2. Separate right and left PD adjustments from 46mm-80 mm 3. Easily adjust nose piece, side length, and angle ensure patient comfort 4. Closed side design keeps hair from being trapped 5.With adult and pediatric nose rests * Technique Parameters : 1. Range of PD adjustments : PD of both eye : 48 80mm; Left or Right PD : 24 40mm; Minimum Calibration Value : 1mm 2. Axial calibration on each disc : Left disc : 135° 0° 140°,Right disc : 40° 180° 45°, Axial calibration increasescounter clockwise along the lens frame axis, and the calibration distance is 5°. 3. Inner diameter of lens frame : 32.5mm 4. The number of lens inserted into left or right lens frame simultaneously: 5 pieces 5. Degree of lens rotating around optical axis in the lens frame : 360° 6. Non-parallelism degree between lens' optical axis and lens frame's geometric axis : ≤2.5° 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 pad adjustment : vertical adjustment range : 0 18mm, Lateral angle range : 0° 360° 9. Range of frame leg's length adjustment :110 135mm 10.Maximum interval between left and right frame legs : 200mm 11.Weight : 72g 12.Comes in packaged case. Very High Quality Guarantee&competitive price !