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FAC lens
J10919
The J10919 series FAC lens is an optical lens that collimates light spreading from a semiconductor laser (LD) in the fast-axis direction. LD have a large divergence angle in the fast-axis direction, so the output light cannot be efficiently used unless collimated. The FAC lens collimates light spreading from a LD into a narrow beam with a radiation angle of several milliradians (mrad) or less so that the diverging light can be efficiently utilized.
Collimating light
Features
Aspheric micro-cylindrical lens
Highly efficient utilization of light from LD bar
Small variations in characteristics allow mass production
Minimized smile and side lobes due to high-precision fabricating technology
Output distribution image
Specifications
| Parameter | FAC300 | FAC610 | FAC920 | Unit | |
|---|---|---|---|---|---|
| Type No. | J10919-03 | J10919-01 | J10919-02 | ー | |
| Wavelength area | 790 to 990 | nm | |||
| Numeric aperture (NA) | Min. | 0.8 | ー | ||
| Material | High refractive index glass | ー | |||
| Refractive index at 915 nm | 1.809 | ー | |||
| Effective focal length (EFL) | 300 | 610 | 920 | μm | |
| Back focal length (BFL) | 80 | 100 | 150 | μm | |
| Height (H) | 0.50 | 1.00 | 1.50 | mm | |
| Width (W) | 0.40 | 0.94 | 1.41 | mm | |
| Length (L) | 4.0 | 12.0 | mm | ||
| Efficiency | Min. | 85 (±2.5 mrad) | 85 (±1.5 mrad) | 85 (±1.0 mrad) | % |
| Transmittance | Min. | 98 | % | ||
Dimensional outlines (Unit mm)
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