- ML series
ML-20-37-VIS-36D
The ML-20-37 is a mechanically focus-tunable lens featuring a 20 mm clear aperture and an optical power range from –18 to +18 diopters. Focus is adjusted by rotating the outer ring, smoothly transitioning the lens curvature from concave to convex. Its durable, low-torque mechanism enables long service life and straightforward motorization for precise, repeatable focus control. Available with or without a C-mount adapter, it integrates seamlessly into a wide range of optical setups.
Main specifications:
Clear aperture: 20 mm
Outer diameter: 37 mm
Focal power range: -18 to 18 dpt
Abbe number: 65
Transmission: 95%
Lifetime: >100K full cycles, >5M random steps
Repeatability when motorized: <0.1 dpt
This product has multiple version.
The best quality possible
Configurations
The compact version can be integrated into OEM systems using four mounting screws. The C-mount version is well suited for imaging and optical-bench use, supported by its integrated post-mount thread.Applications
EL-20-37 is ideal for refraction correction in ophthalmic devices such as phoropters. It also functions effectively as a variable beam expander and is well suited for illumination and educational applications.| Product name | Focal power range (dpt) | Cover glass coating (nm) | C-mount | Wavefront error * | hf:tax:pa_atr-focal-power-range | hf:tax:pa_atr-cover-glass-coating-nm | hf:tax:pa_atr-c-mount | hf:tax:pa_atr-wavefront-error |
|---|---|---|---|---|---|---|---|---|
| ML-20-37-VIS-36D | -18 to 18 | 400 – 700 | No | <0.19 / 0.95 | 18-to-18 | 400-700 | no | 0-19-0-95 |
| ML-20-37-VIS-36D-C | -18 to 18 | 400 – 700 | Yes | <0.19 / 0.95 | 18-to-18 | 400-700 | yes | 0-19-0-95 |
* Wavefront error provided in λ RMS @525nm (at 0 dpt / across tuning range).