A ball lens is a class of optical lenses with a spherical appearance. Due to its spherical symmetry, the radius of curvature of any point on the spherical surface is the same, and thus a spherical lens is characterized by a fixed focal length. The surface of a spherical lens can be categorized into two types: convex and concave lenses.

A Half lens, on the other hand, is a spherical lens with a section cut in the sphere, usually in half, hence the name hemispherical lens. Hemispherical lenses are similar to spherical lenses in that they are also characterized by a fixed focal length, but because of the loss of spherical symmetry, their optical properties are slightly different from those of spherical lenses.

The appearance of a ball lens is shaped as a sphere, while a hemispherical lens is shaped as a hemisphere by cutting a section on a spherical surface.

Ball lenses and hemispherical lenses differ in their optical properties. Since a spherical lens has spherical symmetry, its radius of curvature is the same at any point, so its optical focal length is also fixed. On the other hand, hemispherical lenses lose their spherical symmetry and may have different radii of curvature and optical focal lengths at different locations.

Ball lenses and hemispherical lenses also differ in application scenarios. Due to their stable optical properties, spherical lenses are often used as lenses in imaging optical systems, such as camera lenses and microscopes. The hemispherical lens is more suitable for some special optical or electronic systems, such as LED lighting lamps in the bulb lens, camera in the wide-angle lens.

To summarize, there are differences between ball lenses and hemispherical lenses in terms of geometry, optical properties and application scenarios. In practical applications, suitable optical lenses should be selected according to the specific requirements of the system.

More Detail To Contact Us