High-Precision Knob-Focus Collimator, it is suitable for collimating the output light of optical fibers or coupling spatial light into optical fibers. Through strict control of machining tolerances and the design of a special internal structure, excellent coaxiality is maintained throughout the focal length adjustment process. The adjustment knob adopts a fine-thread design, which balances a lightweight operating feel with high adjustment precision. This product features excellent long-term stability-no significant internal stress is generated when the ambient temperature changes, and the coupling efficiency can be maintained at a high level. High-quality lenses ensure the Gaussian beam profile of the output light and reliable coupling efficiency.
Mechanical Parameters：
● Clamping diameter: φ = 13.5 mm
● Precision focus-adjustment thread with a 0.25 mm pitch
● Fiber connector types: FC-PC / FC-APC / SMA905
Aspheric Lens Selection：
Lens Model | A4.5 | A5.5 | A6.2 | A7.5 | A9.6 | A11 | A13.86 | A15.3 | A18.4 |
Focal Length (mm) | 4.51 | 5.5 | 6.2 | 7.5 | 9.6 | 11 | 13.86 | 15.29 | 18.4 |
Back Focal Length (mm) | 3.08 | 3.73 | 3.46 | 5.82 | 8.13 | 7.97 | 12.11 | 14 | 17.13 |
NA | 0.55 | 0.6 | 0.4 | 0.3 | 0.3 | 0.25 | 0.18 | 0.16 | 0.15 |
Maximum Clear Aperture (mm) | 5.2 | 6 | 5 | 4.54 | 5.2 | 5.5 | 5.1 | 5 | 5.5 |
Center Design Wavelength | 780nm | 633nm | 780nm | 780nm | 633nm | 633nm | 650nm | 780nm | 780nm |
Collimated Beam Waist Diameter (mm) | 0.7a 0.92b 0.88c | 0.86a 1.12b 1.07c | 0.97a 1.27b 1.21c | 1.18a 1.53b 1.46c | 1.5a 1.96b 1.87c | 1.72a 2.24b 2.15c | 2.17a 2.83b 2.7c | 2.4a 3.12b 2.99c | 2.87a 3.76b 3.59c |
Beam Waist Position (mm) | 9 | 11 | 12.4 | 15 | 19.2 | 22 | 27.7 | 30.6 | 36.8 |
Rayleigh Range (m) | 0.96a 0.78b 0.39c | 1.43a 1.16b 0.58c | 1.82a 1.48b 0.74c | 2.66a 2.16b 1.09c | 4.36a 3.55b 1.78c | 5.72a 4.66b 2.34c | 9.1a 7.4b 3.7c | 11a 9b 4.5c | 16a 13b 6.5c |
Divergence Angle (mrad) | 0.36a 0.59b 1.12c | 0.3a 0.48b 0.91c | 0.27a 0.43b 0.81c | 0.22a 0.35b 0.67c | 0.17a 0.28b 0.53c | 0.15a 0.24b 0.46c | 0.12a 0.19b 0.37c | 0.11a 0.17b 0.33c | 0.09a 0.15b 0.28c |
Coating | 350-700nm(VIS) 600-1050nm(NIR) 1000-1700nm(IR) |
The collimated beam waist size, Rayleigh range, and divergence angle are theoretical values.
a. The fiber used is PM-S405-XP, with a 3.3 μm mode-field diameter, calculated at 405 nm.
b. The fiber used is PM780-HP, with a 5.3 μm mode-field diameter, calculated at 850 nm.
c. The fiber used is PM1550-XP, with a 10.1 μm mode-field diameter, calculated at 1550 nm.
