High Quality Spherical Lenses

High Quality Spherical Lenses

Spherical lenses are lenses with at least one curving surface. They converge or diverge light, change the path of light and affect the wavefront curvature of light. They  are widely used in medical imaging, laser optics, security monitoring, automotive industry, military industry, aerospace and other high-tech fields.

What are the kinds of spherical lenses?

1. Plano Convex Lenses

A plano convex lens is a lens that is flat on the one side and convex on the other. Plano convex lenses converge parallel light, correct the deflected light and convert point light sources into parallel light. When light enters from the convex surface of the plano convex lens, the light will converge to a point on the convex surface. When a point light source enters from the plane of the plano convex lens, the light will be turned into a parallel beam. The focal length of a plano convex lens can vary depending on wavelength. Plano convex lenses can be used in transmitters, detectors and lasers.

2. Plano Concave Lenses

A plano concave lens is a lens that is flat on the one side and concave on the other side. The plano concave lens deviates from the parallel incident light and fors a visible virtual image. The collimated beams through the plano concave lens become divergent beams.  In the optical system, plano concave lenses are possible to enlarge the light beam, increase the focal length, project light, and cancel the aberrations of additional lenses in the optical system. Plano concave lenses can be used in laser beam expanders, telescopes, collimators, optical transceivers, magnifiers and radiometers.

3. Bi-Convex Lenses

A Bi-Convex lens is a lens that is convex on both sides, with similar curvature radii on both sides. Bi-Convex lenses are symmetrical, which can minimize spherical aberration, coma, distortion, and aberration. The larger the conjugate ratio, the larger the aberration generated. One side of the Bi-Convex lens is used to correct deviated light. The other side focuses parallel light into small spots. Bi-Convex lenses converge, transmit lights and can transfer images to other optical systems. Commonly used in imaging relay systems and imaging of objects with limited conjugate distances.

4. Bi-Concave Lenses

A biconcave lens is a lens with a concave surface on both sides, with the same curvature radius on both sides. Bi-concave lenses disperse collimated light and converge the input light. In the optical system, they can be used to expand the beams, project the light and increase the focal length of the optical system to minimize spherical aberration, coma and distortion under unit conjugate ratio. They are used in laser beam expanders, optical character readers, viewers and projection systems.

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