{"product_id":"precision-optical-lens-clock-base-curve-gauge-2-jewels-diopter-spherometer","title":"Precision Optical Lens Clock Base Curve Gauge (2 Jewels) - Diopter Spherometer","description":"\u003cp\u003eThe \u003cstrong\u003ePrecision Optical Lens Clock Gauge (2-Jewel Spherometer)\u003c\/strong\u003e is an essential diagnostic and inspection instrument designed to measure the base curvature, surface radius, and dioptric power of optical eyeglass lenses.\u003c\/p\u003e\n\n\u003cp\u003eCalibrated to standard optical refractive index \u003cstrong\u003en = 1.53\u003c\/strong\u003e, this dial gauge features a highly sensitive 2-jewel movement and three durable contact pins to deliver fast, accurate, and repeatable readings for optometrists, optical labs, and lens manufacturing facilities.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Precision 2-Jewel Movement:\u003c\/strong\u003e Minimizes internal friction for ultra-smooth needle response and accurate ±20 diopter measurements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard Optical Calibration:\u003c\/strong\u003e Calibrated for standard ophthalmic lenses (refractive index n = 1.53) with clear dual-direction (+ \/ -) dial graduation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Stainless Steel Construction:\u003c\/strong\u003e Premium stainless steel body and precision-ground probe tips ensure long-lasting wear resistance and measurement integrity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Portable:\u003c\/strong\u003e Pocket-sized 50 mm dial with a protective hardshell storage case for convenient benchtop or field use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStep 1 (Zero Calibration):\u003c\/strong\u003e Place the three contact pins vertically on a completely flat surface to ensure the needle points precisely to 0.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStep 2 (Front Curve):\u003c\/strong\u003e Press the pins perpendicular to the front surface of the lens to record the front curve value.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStep 3 (Back Curve):\u003c\/strong\u003e Press the pins perpendicular to the rear surface of the lens to record the back curve value.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStep 4 (Calculation):\u003c\/strong\u003e The true dioptric power \/ base curve is calculated from the difference between the two readings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Optical Lens Clock \/ Base Curve Spherometer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJeweled Bearings:\u003c\/strong\u003e 2 Jewels\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCalibrated Refractive Index:\u003c\/strong\u003e n = 1.53\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasurement Range:\u003c\/strong\u003e 0 to ±20 D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDial Diameter:\u003c\/strong\u003e 50 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Dimensions:\u003c\/strong\u003e 59 mm × 50 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Weight:\u003c\/strong\u003e 65 g (0.065 kg)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackaging Dimensions:\u003c\/strong\u003e 73 mm × 86 mm × 33 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e 1 × Lens Clock Gauge, 1 × Protective Storage Case\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GOOGmachine","offers":[{"title":"Default Title","offer_id":51051842076775,"sku":null,"price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/7606\/0263\/files\/image_a84c8b5b-f632-47dc-bb6c-2d7dddd6a90f.png?v=1793756852","url":"https:\/\/googmachine.com\/products\/precision-optical-lens-clock-base-curve-gauge-2-jewels-diopter-spherometer","provider":"GOOGmachine","version":"1.0","type":"link"}