spherical lenses

Spherical lenses have at least one surface with a constant radius of curvature. There are two categories of spherical lenses: Convex (Converging) and Concave (Diverging).

Converging (Positive) Lenses, bi-convex lens, convex lens
Converging (Positive) Lenses
diverging lenses, concave lens, bi-concave lens
Diverging (Negative) Lenses


Download  MIL-PRF-13830B


Tolerance Chart


optical lens tolerance chart


Click here to Download Tolerance Chart



The manufacturing process of spherical lenses begins with a quote created by a Manufacturing Engineer. The Manufacturing Engineer then designs and orders a near net shape optical glass blank. The optical glass blanks are then delivered to the production line. Once an order starts being processed, the first step is to have diamond ring tools generate the radius into the glass blank. A series of progressively smaller grit diamond wheels or loose abrasive material is then used to finely grind the lens blank. Finally, the polishing process uses pitch or polyurethane pads and a cerium oxide slurry to finish the spherical surface. The finished optical lenses are then either shipped to the customer or retained in the facilities for further treatment with processes such as custom coatings and truncations.


At LaCroix Precision Optics, our vast inventory of conventional and CNC production equipment allows the freedom to manufacture your lens designs in the most efficient and cost-effective manner.

  • Precision centering
  • Custom truncations
  • Off-axis spherical lenses


We have extensive in-house coating capabilities to meet your requirements. See our coating capabilities.

Uses for Optical Lenses
Surgical loupes Microscopy Multi-spectral imaging
Telescopes LASIK devices Machine vision
Ophthalmology Threat detection Laser target designators