Spherometer
Product Code : SCL-PLE-11783
The JLab India Spherometer is a high-precision micrometric instrument engineered for the empirical measurement of the radius of curvature of spherical surfaces (lenses and mirrors) and the thickness of thin plates. Optimized for Secondary and University-level physics, this apparatus utilizes a fine-pitch screw mechanism to provide sub-millimeter vertical displacement readings. It facilitates the quantification of surface geometry with a typical least count of 0.01mm or 0.005mm within institutional laboratory environments.
Technical Specifications
| Tender Specification | OEM Technical Detail |
| Frame Construction | Triangular or tripod base made of heavy-duty brass or stainless steel |
| Screw Mechanism | Stainless steel fine-threaded screw (typically 0.5mm or 1mm pitch) |
| Vertical Scale | Fixed linear scale graduated in millimeters (Pitch Scale) |
| Circular Scale | Large-diameter rotating disc graduated into 100 or 200 equal divisions |
| Legs | Three fixed outer legs with pointed hardened steel tips for stable 3-point contact |
| Least Count | Typically 0.01mm (calculated as Pitch/No. of divisions) |
| Central Tip | Precision-tapered central screw for "null-point" contact detection |
Certification | ISO certificates available on request |
| HS Code | 9017.30.00 (Micrometers, calipers, and gauges) |
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
- Micrometric Interface: Facilitates student understanding of how rotational motion is converted into linear displacement, supporting Metrology Module 101.
- Curvature Quantification: Enables the physical study of lens geometry, allowing learners to apply the formula R=6hl2+2h (where l is the distance between legs and h is the spherometer reading) to determine the radius of curvature.
- Sagitta Analysis: Supports the analysis of "sagitta" (the height of the arc), providing a hands-on method to differentiate between plano, convex, and concave surface depths.
- Measurement Accuracy Evaluation: Allows students to evaluate the impact of "Zero Error" and mechanical backlash, fostering rigorous data collection habits in experimental physics.
International Logistics & Compliance
JLab India ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade seaworthy crating (ISPM-15 compliant) featuring high-impact protective cases with precision-cut foam to protect the fine-pitch screw and delicate scale markings.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a table of pre-measured leg distances (l) for instant classroom use.
- Durability: Tropicalized design featuring anti-corrosion materials and hardened tips, ensuring the instrument maintains its "point-accuracy" even in high-humidity climates.
Direct OEM Sourcing Advantages
Procuring the JLab India Spherometer directly ensures vertical manufacturing control:
- In-House Screw Cutting: Every central screw is precision-machined to ensure a perfectly uniform pitch across its entire length, preventing non-linear measurement errors.
- Batch-Tested for Planarity: The three fixed legs are verified for absolute coplanarity on a Grade-0 surface plate to ensure the "zero" reference is stable.
- Direct Factory Spares Availability: Guaranteed availability of replacement circular scales, screws, and protective cases to maximize long-term laboratory ROI.
- Manufacturing Control: Direct oversight of the scale engraving ensures high-contrast markings that remain legible after years of frequent student manipulation and cleaning.
.jpg)
.jpg)
.jpg)