• What is the current development of JDC products for optical tweezers?
  • JDC products produce high-resolution, high-speed reflective phase control. The panel offers two modes of retardance/phase strokes: standard and extended. Standard mode is calibrated such that a full range of input signal corresponds to a linear phase range of 2 pi at 633 nm, while extended mode utilizes the complete range supported by the panel, which is more than 2 pi at 532 nm.

    LCoS panel is driven by an HDMI signal and operates as a general 1080p at 60 Hz HD screen. It is bundled with a software GUI that provides complete control over the device. Different driving modes are supported by the software, including full frame, image input, video input, Fresnel lens, diffraction, and computer-generated holography (CGH). The CGH mode also allows tilting and focusing effects to be overlaid onto a pattern. The GUI enables quick switching between operating modes, as well as allowing images, videos, and patterns to be uploaded to the panel.

  • What are the advantages of LCoS technology for optical tweezer applications?
  • LCOS – Spatial Light Modulators provides flexibility and simplicity in creating multiple traps from a single laser beam. The input phase holograms are changed in real time. This allows trapping and moving of multiple microscopic (10 nm – 50 µm) particles simultaneously. Pointing stabilities of the LCOS-SLM created traps of better than 1 nm and are now as efficient to that of regular non-holographic optical traps. Using multiple Computer Generated Holograms (CGH) allows 3D optical micro-manipulation and can be used for studying biological samples, stem cells and carbon nanotubes among others. The Optical Trapping community reports new applications such as in the field of Microfluidics, Cell sorting, Atom-Trapping, Femto Newton-Force measurements, DNA stretching and Molecular motors among others.