Focus tunable lenses – Overview

iSolutions Technology is the Main Authorised Distributor for Optotune products since 2013. The biggest advantage of focus tunable lenses is the additional degree of freedom offered to optics designers by the focus tunability of the lens. A change in lens radius of several micrometers can have the same optical effect as moving the entire lens several centimeters. Optical systems can thus be designed more compact, oftentimes with less lenses and usually with less or no translational movement.

This means that there is no more need for expensive mechanical actuators. Less movement also leads to a more robust design, which can be completely closed so that no dust can enter. Furthermore, the materials employed are all lighter than glass, saving overall weight. Less movement and weight also means less power consumption and that the response time of systems with tunable lenses can be very low, in the order of milliseconds. Another advantage becomes obvious during production. The fact that less optical parts are moved combined with the tunability of the radius during operation results in higher yield rates.

The following table summarizes the main specifications of currently available focus tunable lenses :

Specification

 

Fast/Precise Electrically tunable lens Fast Electrically tunable lens Fast Electrically tunable lens with temp. compensation Manual tunable lens Fast Electrically tunable lens with temp. compensation Fast Electrically tunable lens with temp. compensation

 

 EL-6-18

EL-10-30

EL-10-30-C-MV
(Machine Vision)

ML-20-35 Series

EL-10-30-TC

EL-16-40-TC
(Machine Vision)

 

OEM version

Industrial version

Size (ØxH)

 18mm x 8.5mm

 30mm x 9.7mm

 30mm x 9.7mm

 35mm x 8mm

 50mm x 19mm

 106mm x  50mm

Clear aperture

 6mm

 10mm

 10mm

 20mm

 25mm

 55mm

Lens Type

 Meniscus
(convex-concave)

 Plano convex

 Plano convex
-150mm offset

Plano convex to plano concave

 Plano convex

 Plano convex

Focal length range

 From -500mm to +50mm

 From +20mm to +200mm

 From -600mm to +170mm

 From -40mm to +40mm

 From +37mm
to infinity

 From +72mm
to infinity

Refrective Index

 1.300

 1.300 or 1.599

 1.300 or 1.599

  1.300 or 1.599

 1.300 or 1.382

 1.300 or 1.382

Documentation           

 EL-6-18

 EL-10-30

 EL-10-30-C-MV
EL-10-30-Ci-MV

 ML-20-35

 EL-10-30-TC

 EL-16-40-TC


Optotune Lens driver: USB 2.0 12-bit current control for electrical tunable lens. A total of 4096 steps having step size of 0.07mA : E-EL-4


Optotune lenses can be tailored to your specific demands in terms of size, tuning range, transmission range or speed. Tell us your requirements and we will be happy to assess the feasibility.

Here are the application videos which gives you a feeling for speed and tuning range of the lens. Is also includes an animation explaining the working principle :-

 

This video includes two examples of the EL-10-30 used for imaging purposes (USB microscope & C-mount camera).

 

This video shows continuous focus of the EL-10-30-C-MV used for Machine vision applications. 

 

Maunal tunable focus lens