Spherical Lenses

Types of Lens

For more information, please visit our website.

Plano-Convex Lenses

Plano-convex and double convex lenses are categorized as positive lenses, which means they have positive focal lengths. Plano-convex lenses have one flat surface and one spherical surface, making them suitable for applications involving infinite or near-infinite conjugates, light collimation, and monochromatic illumination. These lenses minimize spherical aberration up to a conjugate ratio of approximately 5:1 and are often the preferred choice for demanding applications. In an ideal setup, the curved surface should face the infinite conjugate or the largest object distance.

Double Convex Lenses

Link to Hongsheng

Double convex lenses feature two convex surfaces with equal radii and exhibit both horizontal and vertical symmetry. They are well-suited for forming images at close conjugate distances and for image relays. At 1:1 magnification, when the object and image distances are equal, the lens&#;s symmetry cancels out coma, distortion, and chromatic aberration while minimizing spherical aberration. Double convex lenses are recommended for applications where the conjugate ratios range between 5:1 and 1:5.

Magnifying glasses commonly utilize double convex lenses. When the object distance is close, the rays are bent towards the focal point at the center of the lens, resulting in a virtual image appearing much larger than the real image.

Plano-Concave Lenses
Plano-concave lenses have negative focal lengths and are suitable for situations where the light rays need to diverge after passing through the lens. They are used in light projection, beam expansion, or when expanding the focal length of an optical system is desired. When used in conjunction with other lenses, the negative spherical aberration of plano-concave lenses can be utilized to counterbalance the aberrations caused by convex lenses. These lenses have one flat surface and one concave surface, and in most cases, the curved surface should face the most significant object distance. However, in high-energy lasers, the flat surface should be directed towards the infinite conjugate or most considerable object distance to avoid the possibility of a virtual focus.

The company is the world’s best spherical lens supplier supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.