Optical Concave Lens 50mm

The optical concave lens 50mm is a diverging optical component used for spreading incident light rays and demonstrating virtual image formation. It is intended for secondary-school, college and university physics laboratories that require a reusable lens for ray tracing, focal-length studies and compound-lens experiments.

Product Description

The STEMAids Optical Concave Lens 50mm is thinner at its centre than at its edges. Parallel light rays passing through a concave lens diverge and appear to originate from a principal focus on the incident-light side of the lens.

The nominal product size is 50 mm, but the available information does not confirm whether this value represents the overall diameter, clear aperture or mounting size. The focal length, optical power, glass composition and surface finish must also be confirmed before quantitative use. Related equipment is available in the STEMAids physics laboratory products range.

Key Features

• Concave optical profile: Diverges parallel incident rays for practical ray-optics demonstrations.
• Nominal 50 mm size: Provides a laboratory-scale lens format; the exact measurement basis requires confirmation.
• Virtual image formation: Demonstrates an upright, diminished virtual image for a real object used alone.
• Compound-lens compatibility: Supports suitable experiments combining converging and diverging lenses.
• Hands-on ray tracing: Helps students connect physical observations with standard concave-lens diagrams.
• Passive optical component: Requires no electrical supply.
• Reusable laboratory use: Suitable for repeated supervised experiments when handled and stored correctly.

Technical Specifications

What’s Included in the Kit

• One Optical Concave Lens 50mm
• Protective wrapping or storage case
• Lens holder or mounting ring
• Technical data sheet or experiment guide

Request the verified focal length, diameter and supply scope through the STEMAids institutional sales team.

Applications / Uses

• Demonstrating divergence of parallel light rays.
• Tracing principal rays through a concave lens.
• Studying upright, diminished virtual-image formation.
• Estimating focal length using a suitable auxiliary-lens method.
• Investigating combinations of convex and concave lenses.
• Demonstrating the correction principle for short-sightedness.
• Supporting supervised ray-optics practicals and science demonstrations.

How to Use the Optical Concave Lens 50mm

1. Inspect the lens for cracks, chips, dust or fingerprints.
2. Secure it in a compatible holder without applying excessive pressure.
3. Align the lens centre with the light source and observation axis.
4. Direct a narrow beam or several parallel rays through the lens.
5. Trace the diverging emergent rays on a suitable surface.
6. Extend the emergent rays backward to locate the virtual principal focus.
7. Record distances and observations required by the prescribed experiment.
8. Remove the lens by its edges and return it to protected storage.

Safety note: Never look through the lens at the Sun, a laser or an intense lamp. Handle the lens by its edges and do not use it if chipped or cracked.

Care & Maintenance

• Remove loose dust with clean air or a soft optical brush.
• Clean the faces using lens tissue and approved optical cleaner.
• Store the lens separately in a padded, dry and dust-free container.
• Protect the optical surfaces and edges from impact and abrasion.

Why Choose STEMAids

STEMAids is the educational science brand of Eduscope Smart Learning Solutions Private Limited, a New Delhi manufacturer of STEM kits, laboratory learning products and science models. The company states that it is ISO 9001:2015-certified and supports institutional, tender and export orders through an active Importer-Exporter Code. Its catalogue includes practical optics and physics-learning products for classroom and laboratory use. Product-specific optical specifications should be confirmed in the approved quotation.

Frequently Asked Questions

What is an optical concave lens used for?

It is used to diverge light rays and demonstrate virtual-image formation, focal points and compound-lens behaviour.

What does 50 mm mean for this lens?

The product name specifies a nominal 50 mm size. Confirm whether this refers to overall diameter, clear aperture or mounting diameter.

What is the focal length of the lens?

The focal length and optical power are not published. Request the verified value before using the lens for quantitative experiments.

Is the concave lens made of optical glass?

The lens material and optical grade are not verified. These should not be assumed from the product name alone.

Can a concave lens form a real image?

A single concave lens viewing a real object normally forms a virtual, upright and diminished image. Real-image experiments require an appropriate compound optical setup.

Is a lens holder included?

The inclusion of a holder or mounting ring is not confirmed. Check the approved bill of materials before ordering.