Plano Concave Lenses
Plano concave lenses are lenses that have a one surface that is flat (plano) and one that is a negative radius (concave). They have a negative focal length so can be used in wide angle door viewer lenses etc.
Kingsview Optical manufactures custom plano concave lenses when stock lenses won’t do. From prototype batches to full production Kingsview has facility to offer both. Our specialty is offering rapid turnaround on lenses and can offer a number of coating options depending on your requirement.
Standard Lens Tolerances
| Size: 0.8mm to 150mm |
| Diameter Tolerance: -0.05 mm |
| Centre Thickness Tolerance: ±0.05 mm |
| Decentration (wedge): ± 2′ |
| Irregularity: λ/4 |
| Spherical Error: 0.5% of radius or better |
| Surface Quality (Scratch/Dig): 40/20 |
| Flatness: λ/4@633nm |
| Coating Broadband AR, V coat, Mgf2 etc |
| Finishing Edge black painted, steps, bevels etc |
| Materials Schott, Ohara, CDGM, Fused Silica |
Lens Tooling
Dependent on the lens geometry and numbers it will be decided which polishing method is best suited. Generally the main reasons for the decision is based on the radius needed. Steep radius lenses tend to be better suited to the CNC as the process is done one at a time. However if the lens is shallow and you can fit many in a block it can be beneficial to polish conventionally.
If the lens is needed to be polished on the CNC there will be a tooling charge as custom tools will be manufactured. Polishing conventionally provided you use one of the many tools we have in stock you won’t have the expense of the tooling charge. This can be beneficial when the numbers are small. Here you can find our tooling list in Zemax format which you can then use to optimise your design to our tools.
Get in touch
We can manufacture most precision optical components including spherical lenses, optical prisms filters and precision windows. Also available is a custom lens design service enabling you to give us your optical requirement for us to create a tailor made solution.
Should you need a quote please get in touch for a no obligation quotation and we hopefully will be able to help.