G lens
The G lens, fully known as a gradient-index lens, is a special optical element whose core feature is that the refractive index of the material is distributed in a gradient inside the lens, rather than a constant value like traditional lenses. This refractive index change is usually radial (i.e., gradually changing from the center to the edge), so that light propagates inside the lens along a continuously curved path rather than being suddenly bent at the surface.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Refractive Index Profile Type | Radial (parabolic); axial (linear/nonlinear) |
| Available Materials | Aluminosilicate glass, silicon (IR), germanium, PMMA (polymer) |
| Length Options | Typically P/4, P/2, P (custom lengths available) |
| Numerical Aperture | 0.2~0.5 (depending on refractive index gradient and application) |
| Surface Roughness | <1 nm RMS (for high-precision optical coupling) |
| Focusing Conditions | L = P/4 -> light focused at the output end face |
| Wavelength Compatibility | UV to near-infrared (glass), 1~8 μm (silicon), adjusted via material selection |
| Transmission Efficiency | >95% (AR coating available) |
| Application Fields | Fiber-optic communications, laser systems, endoscopes, sensors, photonic chips |
Key Features
Datasheet
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Supplier Information
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