Spherometer Manufacturer,Supplier and Exporter in India
Product Code : EL-PLEA-13378
Jlab Export is a leading Spherometer Manufacturer,and suppliers in India
Spherometer (code EL-PLEA-13378) is an economy double-disc spherometer for measuring the radius of curvature of a lens or other curved surface. Three painted steel legs stand on a circular metal table of at least 50 mm diameter, and a steel screw runs in long adjustable brass bearings, with a circular scale on the screw and a vertical scale on the table. JLab builds the instrument in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Type | Economy spherometer, double disc |
| Table | Circular metal table, min. 50 mm diameter |
| Legs | Three accurately positioned painted steel legs |
| Screw | Steel screw thread in long adjustable brass bearings |
| Scales | Circular scale on the screw, vertical scale on the table |
| Use | Radius of curvature of lenses and curved surfaces |
| Quality check | Each spherometer is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-PLEA-13378 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
Measuring Radius of Curvature
Stand the spherometer on a flat glass plate, turn the screw until its tip just touches, and note the vertical and circular scale readings. Move it onto the lens, adjust the screw until the tip touches the curved surface with all three legs resting on it, and read again; the difference between the two readings is the sagitta h. With l as the mean distance between the legs, the radius follows from R = l² / (6h) + h / 2. Turning slowly near contact, and watching for the instrument to rock, avoids overshooting the touch point.
How the Instrument Is Built
The legs are set accurately on the table so the screw tip sits at the centre of the triangle they form. The brass bearings can be adjusted to take up play in the thread, and the circular scale turning with the screw is read against the vertical scale, which counts whole turns while the circular scale gives the fraction of a turn. Besides routine physics practicals, spherometers are used in optometry to check lens surfaces.
Related Instruments
- Spherometer Double Disc — another double-disc spherometer in the physics range.
- Spherometer Demonstration Model — a model for showing the principle to a class.
- Micrometer Screw Gauge in mm — the screw principle applied to wire and sheet thickness.
Other optics and measuring apparatus can be found in Physics Lab Equipment Ambala.
Request a Quote
Ask for a quotation through Add To Cart or the contact page, with the number of spherometers and the delivery location.
Last updated: 25 October 2026
