Focus tunable lenses

Optotune is a leading supplier of focus tunable lenses, also known as liquid lenses. Initially developped in 2008, Optotune’s lenses have become the prime choice for demanding focusing solutions making them:

More compact
Faster
Highly reliable
Less tolerance sensitive
More flexible with remote control

Optotune lenses come in a variety of sizes from 3 to 42 mm clear aperture, with several coating options ranging from 400 to 2200 nm and comprise three sub-families:

Electrically tunable lens (EL series)
Manually tunable lenses (ML series)
Electrical lens modules (ELM-F and ELM-T series).

Gravity Compensated Liquid Lenses by Optotune

Standard vs Gravity Compensated Liquid Lenses

Optotune liquid lenses for fast focusing in machine vision 简中字幕

Webinar on liquid lenses and how they can be used in Zemax

The following table summarizes the main specifications of Optotune's EL and ML series:

Product series	Product description	Clear aperture (mm)	Size ØxH (mm)	Lens type	Optical power range (dpt)	Refractive index
CCM	Compact lens solutions	1.3 - 4.4	Customizable			1.30 or 1.45
EL-3-10	Electrically tunable lens	3	10 x 4.0	Plano convex to plano concave	-13 to + 13	1.30
EL-10-42-OF	Electrically tunable lens	10	42 x 41	Plano convex + plano concave offset lens with optical feedback (OF)	-2 to +2	1.30
EL-12-30-TC	Electrically tunable lens	12	30 x 5.8	Plano convex to plano concave	-6 to +10	1.45
EL-16-40-TC	Electrically tunable lens	16	40 x 11.9	Plano convex to plano concave	-2 to +3 -10 to +10	1.30
ML-20-37	Manually tunable lens	20	37 x 13.2	Plano convex to plano concave	-18 to +18	1.38