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Lenses Cylindrical Glass, Biconvex
Lenses Cylindrical Glass, Biconvex (Product Code: SLE/PHY/109) is a converging cylindrical glass lens used to bring parallel rays of light to a line focus in optics and ray-diagram experiments. School and college physics students use it to measure focal length directly on paper, and it is listed with a 75 mm focal length and 50 x 45 dimensions. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India, as optics lab equipment for India.
Specifications
| Parameter | Detail |
|---|---|
| Lens type | Biconvex (converging), cylindrical |
| Material | Glass |
| Dimensions | 50 x 45 (as listed; unit not stated) |
| Focal length | 75 mm |
| Finish | Precision finished, for a variety of light and optics experiments |
| Packing | Individually pouched in a neat presentation case |
| Product code | SLE/PHY/109 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Biconvex Cylindrical Lens Used For?
With both faces curved outwards, this lens bends a fan of parallel rays inwards so that they cross at a bright focus about 75 mm behind it. Students stand the lens on a sheet of paper, mark the incoming and outgoing rays with a sharp pencil, and measure from the lens centre to the crossing point to find the focal length for themselves.
Moving the light source closer than the focal length shows the rays leaving the lens still diverging, the ray-diagram basis of a magnifying glass. Outer rays usually cross slightly nearer the lens than central ones, giving a visible example of spherical aberration for advanced classes. Keep fingerprints off the curved faces and slide the lens back into its pouch after each practical.
What to Specify When Ordering
- Which lens you need: biconvex, biconcave or planoconvex.
- Quantity per student group or laboratory.
- Whether all three shapes should be quoted for comparison experiments.
OEM Manufacturer
ScienceLab, the brand of Jain Scientific Equipments Private Limited, is the original equipment manufacturer of this biconvex lens and produces it at its licensed factory in Saha, Ambala, Haryana, India. Schools, colleges and optics dealers buy it direct from the maker rather than a reseller, which keeps repeat orders and replacement lenses simple — just ask us. Visit the ScienceLab company profile to learn more.
Related Physics Lab Equipment
Items that extend a converging-lens practical:
- Lenses Cylindrical Glass, Biconcave — the diverging lens of the same 75 mm series.
- Lenses Cylindrical Glass, Planoconvex — a converging lens with one flat face for comparison.
- Prism, Clear Glass — adds dispersion and deviation to the same optics session.
- Laser Pen, Red — a single narrow beam for precise ray tracing.
The full optics range is in our Physics Lab Equipment category.
Frequently Asked Questions
What focal length does the Lenses Cylindrical Glass, Biconvex have?
The Lenses Cylindrical Glass, Biconvex has a listed focal length of 75 mm. Parallel rays entering one curved face converge to a real line focus about that distance behind the lens, which students can mark and measure on paper.
What does the lens come packed in?
The Lenses Cylindrical Glass, Biconvex is individually pouched and supplied in a neat presentation case. This protects the precision-finished faces in transit and gives teachers a tidy way to issue and collect the lens during practicals.
Can the biconvex lens show spherical aberration?
Yes. With a wide fan of parallel rays, the outer rays passing through the Lenses Cylindrical Glass, Biconvex usually cross a little nearer the lens than the central rays. Drawing both crossing points on paper makes spherical aberration easy for students to see.
What size is the lens?
The Lenses Cylindrical Glass, Biconvex is listed as 50 x 45, but the original description does not give the unit. If you need an exact size for a holder or ray box, please confirm it with us through the contact page when you enquire.
Who makes the Lenses Cylindrical Glass, Biconvex?
Jain Scientific Equipments Pvt Ltd, trading as ScienceLab, manufactures the Lenses Cylindrical Glass, Biconvex as the OEM at its own factory at Saha, Ambala, Haryana, India. Quotations and repeat orders are handled directly by the manufacturer.
What should a quotation request include?
A quotation request for the Lenses Cylindrical Glass, Biconvex (SLE/PHY/109) should give the number of lenses, any other lens shapes from the series you need, and the delivery destination in India or abroad. Send it through the contact page or enquiry cart.
Request a Quote
Contact ScienceLab for a quotation on the Lenses Cylindrical Glass, Biconvex, or save it in the enquiry cart. The quotation comes directly from the factory that makes it.
Last updated: 24 September 2026
