Quick Answer: The Lenses, Spherical Double Convex are bi-convex spherical lenses in crown or optical flint glass, made in 38 mm, 50 mm and 75 mm diameters. They are used to find focal length and magnification and to form real images.
Last updated: October 2026
Key Features
Bi-convex (double convex) spherical profile
Crown glass or optical flint glass
Diameters 38 mm, 50 mm and 75 mm
Ground and polished edges
Technical Specifications
Specification
Value
Material
Crown glass / optical flint glass
Geometry
Bi-convex spherical
Diameter
38mm, 50mm or 75mm
Edge finish
Ground and polished
HS Code
9001.90.00 (Unmounted Optical Elements)
About This Product
Double convex lenses are used in physics practicals to bring light to a focus, form real images on a screen and measure focal length and magnification. Results can be checked against the lens formula and the lens maker’s formula.
Frequently Asked Questions
What diameters are the Lenses, Spherical Double Convex made in?
They are made in 38 mm, 50 mm and 75 mm diameters.
.png)
.png)
.png)
.png)