Haptic Manipulation of Microspheres Using Optical Tweezers

Using optical tweezers (OT) and a haptic device, microspheres having diameters ranging from 3 to 4 ␮m (floating in a fluid solution) are manipulated in order to form patterns of coupled optical microresonators by assembling the spheres via chemical binding. For this purpose, biotin-coated microspheres trapped by a laser beam are steered and chemically attached to an immobilized streptavidin-coated sphere (i.e., the anchor sphere) one by one using an xyz piezo scanner controlled by a haptic device. The positions of all spheres in the scene are detected using a CCD camera and a collision-free path for each manipulated sphere is generated using the potential field approach. The forces acting on the manipulated particle due to the viscosity of the fluid and the artificial potential field are scaled and displayed to the user through the haptic device for better guidance and control during steering. In addition, a virtual fixture is implemented such that the desired angle of approa...

• Type: Conference
• Year: 2006
• Where: HAPTICS
• Authors: Ibrahim Bukusoglu, Cagatay Basdogan, Alper Kiraz, Adnan Kurt
• Keywords: Haptic Device, HAPTICS 2006, Immobilized Streptavidin-coated Sphere, Microspheres Having Diameters, Virtual Reality