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Concave Lens
Concave Lens (Product Code: SCL-398/097) is a round glass diverging lens used to spread light rays and form upright, diminished virtual images in physics practicals. Teachers pair it with a convex lens to find its focal length, and it comes in a 2 inch diameter with exact focal lengths of 10 cm, 15 cm or 20 cm. Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, makes it at its own factory in Ambala, India, for school optics lab equipment.
Specifications
| Parameter | Detail |
|---|---|
| Lens type | Concave (diverging) |
| Diameter | 2 inch (approx. 51 mm) |
| Focal lengths offered | 10 cm, 15 cm or 20 cm (exact focal length) |
| Material | Glass, spherical and optically worked |
| Shape | Round |
| Edges and faces | Ground edges; highly polished faces |
| Chemical and heat resistance | Chemical resistant; heat resistant |
| Intended use | Study of light principles, in the lab or at home |
| Product code | SCL-398/097 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Concave Lens Used For?
A concave lens never forms a real image on its own, so its focal length is measured indirectly. Students place it in contact with a convex lens of shorter focal length so the pair still throws a real image on a screen, find the combined focal length on the optical bench, and then calculate the concave lens value. The same lens shows why diverging lenses are used to correct short sight.
Label storage slots by focal length so a class does not mix up lenses when building combinations, a common problem with any convex and concave lens set used in schools. Wipe the polished faces with lens tissue after use, keep fingerprints off the optical surfaces, and store the lenses edge-down in a soft-lined box.
What to Specify When Ordering
- Focal length needed: 10 cm, 15 cm or 20 cm
- Number of concave lenses of each focal length
- Whether convex lenses of a shorter focal length are needed for the combination method
- Buyer type and delivery location (school, college, dealer or importer)
OEM Manufacturer
Jain Scientific Equipments Private Limited, trading as ScienceLab, is the original equipment manufacturer (OEM) of the Concave Lens. Production takes place at its own licensed factory at Saha, Ambala, Haryana, India, so quotations, repeat orders and matched convex and concave sets come straight from the maker rather than through a reseller. Institutions, dealers and importers can ask us about replacing a lens when a class set loses one. See the ScienceLab company profile.
Related Physics Lab Equipment
Apparatus used with a concave lens in focal-length and image experiments:
- Convex Lens — needed for the combination method of finding focal length
- Optical Bench with 3 Stands — aligning lens, object and screen
- Lens Holder, Wooden — an upright holder for round lenses
- Meter Scale 50 cm — measuring distances on a short bench
Other lenses, mirrors and optics items are listed in the Physics Lab category.
Frequently Asked Questions
Why is a convex lens needed with the Concave Lens?
The Concave Lens (SCL-398/097) diverges light and forms only virtual images, so it cannot throw an image on a screen by itself. Pairing it with a stronger convex lens produces a real image, and the combined focal length is used to calculate the concave lens focal length.
Which focal lengths of Concave Lens can be ordered?
The Concave Lens is available in exact focal lengths of 10 cm, 15 cm and 20 cm, each with a 2 inch (about 51 mm) round glass body. Mention the focal length when ordering, because the combination method works when the convex partner has a shorter focal length.
What finish does the Concave Lens have?
The Concave Lens is spherical, optically worked glass with ground edges and highly polished faces. The ground edge gives students a safe place to hold the lens, while the polished surfaces keep the diverging rays clean for ray-tracing and virtual-image observations.
Can the Concave Lens be used at home as well as in the lab?
Yes, the Concave Lens is described as suitable for lab or home use in the study of light principles. At home, students can look through it to see upright, diminished virtual images, a simple way to revise how diverging lenses behave.
Who makes the Concave Lens?
The Concave Lens is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its own factory at Saha, Ambala, Haryana, India. Buying from the manufacturer means matched concave and convex lenses, and later repeat orders, come from one source.
What should a Concave Lens quotation request include?
A quotation request for the Concave Lens should list the focal lengths, the quantity of each, any matching convex lenses and the delivery location. Send it through the ScienceLab contact page; schools, dealers and importers in India and international markets receive a quote from the manufacturer.
Request a Quote
Send your Concave Lens focal lengths and quantities through the ScienceLab contact page for a quotation direct from the manufacturer, or add the lens to the enquiry cart with matching convex lenses.
Last updated: 24 September 2026
