Tunable Lens System
About the Tunable Lens System
ASI’s Tunable Lens system consists of the C60-TUNELENS-4F assembly along with the TGTLC card of the TG1000 controller. The system lets the user remotely control the focus of the system without moving the objective. C mounts are used to mount the C60 Tunable 4F assembly to the imaging camera and to the microscope’s photo port.
The C60-TUNELENS-4F assembly houses a shape changing polymer lens or tunable lens. The TGTLC card can vary the focal length of the lens by varying the current. The C60-TUNELENS-4F assembly is designed to be used with a microscope with the tube lens focused to the Back Focal plane of the objective so a change in the focal length of the tunable lens produces a focus change in the image too. The amount of focus change depends on the optics of the microscope, and the type of Objective.
For example in an ASI RAMM Microscope, a 20x Objective produces 80 microns of focus change, while a 60x objective produces 8 microns of focus change. The focal length change of the tunable lens itself is +8 diopters to 20 diopters.