The double convex lens is symmetrical across both its horizontal and vertical axis. Each of the lens' two faces can be thought of as originally being part of a sphere. The fact that a double convex lens is thicker across its middle is an indicator that it will converge rays of light that travel parallel to its principal axis. A double convex lens is a converging lens. A double concave lens is also symmetrical across both its horizontal and vertical axis. The two faces of a double concave lens can be thought of as originally being part of a sphere. The fact that a double concave lens is thinner across its middle is an indicator that it will diverge rays of light that travel parallel to its principal axis. A double concave lens is a diverging lens. These two types of lenses - a double convex and a double concave lens will be the only types of lenses that will be discussed in this unit of The Physics Classroom Tutorial.
| ECOPTIK (CHANGCHUN) LTD | |
|---|---|
| Product Category | Optical Lenses |
| Product Name | Double Convex Lens |
| Lens Type | Spherical Lens |
| Focal Length | 50 to 2000 mm (1.97 to 78.74 inch) |
| Center Thickness | 2 to 20 mm (0.0787 to 0.7874 inch) |
| Diameter / Length | 2 to 300 mm (0.0787 to 11.81 inch) |
