SPHERICAL LENSES
WEO manufactures a wide range and variety of spherical lenses for medical, life sciences and consumer applications.
Suitable applications:
PRECISION MANUFACTURING
Customised edge profile is ground by using CNC process. In addition, paint or ink may be applied on the ground edge of the lenses, if required by customer.
Lenses could be bonded to become doublet or triplet lenses with high centration accuracy. Precision metrology, such as interferometer and centering scope are used to measure the quality level of the lenses.
OPTICAL GLASS MATERIALS
Our optical glass materials used are supplied by Schott, Ohara, CDGM and other reputable manufacturers. They may be supplied as pressed blank, plano ground disk or block glass.
Overview of WEO’s spherical lenses
| Material |
|---|
| Schott, Ohara, CDGM & others |
| Pressed blank |
| Plano ground disk |
| Application |
|---|
| Small lenses – Endoscope, microscope |
| Medium lenses – Binocular, objective lens, imaging lens |
| Configuration |
|---|
| Bonded lenses – doublet; triplet |
| Profiled edge – by CNC process |
| Blacken edge – paint; ink |
| Metrology |
|---|
| Interferometer |
| Centering scope |
| Measuring projector |
Spherical lens manufacturing capabilities
| Parameters | Typical specs | Precision specs |
|---|---|---|
| Diameter (2.5–100mm) | +/- 0.025mm | +/- 0.010mm |
| Centre thickness | +/- 0.05mm | +/- 0.02mm |
| Irregularity on diameter 30mm | < 0.5 fringe | < 0.2 fringe |
| Irregularity on diameter 50mm | < 1 fringe | < 0.3 fringe |
| Surface defects | 5/2 x 0.16 | 5/1 x 0.063 |
| Centering error (reflection) | 3/1.5’ | 3/0.5’ |
