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Rod lens systems use special glass rods with optically finished ends, providing images with higher brightness, contrast and colour reproduction than conventional lenses.
The optical quality of lens-generated images of rigid endoscopes still surpasses that of the fiber-optic or digital images produced by flexible scopes. Micro Rod Lenses are available with flat, plano-convex, plano-concave, cemented etc which applied in medical endoscopes.
| Material | N-BK7, UVFS, H-K50, H-F4, H-BAK7, H-LAF10L, N-SK15, H-ZK21, H-F1, H-ZF4 |
| Diameter | Ø0.6mm or customization |
| Type | Flat/Flat, Plano-Convex, Plano-Concave, Cemented |
| Flatness | N<3, ΔN<0.5 for spherical surface; N λ/4~λ/8 for flat surface |
| Centering | <5' |
| Surface Quality | 20/10~60/40 |
| Clear Aperture | 90% |
| Coating | Uncoated, or customized |
| Material | Length | Dia 1-8 Range (mm) |
|---|---|---|
| Optical Glass Mix | 11.4 - 20.2 | 1.7 / 1.8 / 1.9 / 2.0 / 2.1 / 2.2 |
| Optical Glass Mix | 22.9 - 24.0 | 1.8 / 1.9 / 2.0 / 2.1 / 2.2 / 2.7 / 2.77 / 2.8 |
| Optical Glass Mix | 29.0 - 29.8 | 2.7 / 2.8 / 3.0 / 3.2 / 3.5 |
| Optical Glass Mix | 46.0 | 5.5 / 6.0 / 6.5 / 6.6 |