TOOLS 010221

Lens clock 30 ALL RIGHTS RESERVED © MEASURING INSTRUMENTS 3.6 Ref. 04950 THICKNESS GAUGE WITH HARDENED BALL TIPS Measuring range: 0-10 mm Jaw depth: 35 mm Reading: 0,05 mm Ref. 04955 THICKNESS GAUGE WITH HARDENED BALL TIPS Measuring range: 0-20 mm Jaw depth: 80 mm Reading: 0,05 mm Ref. 04962 Ideal for quickly checking the rimless lens hole diameter. 6 rounded steel tips each one with a double measuring scale. 0,8-1,2 mm. 0,9-1,3 mm. 1,0-1,4 mm. 1,1-1,5 mm. 1,6-1,8 mm. 2,0-2,2 mm. 1 pc. Thickness gauges Lens hole gauge Ref. 04980 LENS CLOCK WITH SAPPHIRE BALL TIPS The lens clock measures the lens curve (base) and determines the optical power of the lens. Measuring range: 0 - 20 dioptres Double scale for refraction index: n=1.523 and n=1.70 Example 1 LENS CURVE READINGWITH SCALE n=1.523 External lens surface (positive): +4.0 dpt = BASE 4 Example 2 OPTICAL POWER READINGWITH SCALES n=1.523 and n=1.70 External lens surface (positive): +4.0 dpt Internal lens surface (negative): –2.0 dpt = Optical power: +2.0 dpt

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