Optical Tweezers System STS1

JCOPTIX optical tweezers comprise basic, standard, and vortex versions. Basic/standard traps capture and move 1-10 μm particles. Vortex systems add polarization: a polarizer and angled 1/4-waveplate create circular light, then a vortex plate produces a selected topological charge, capturing/moving 1-10 μm particles and rotating them. Modular basic/standard systems have laser, illumination, imaging, and motion-control sections. Infinity-corrected plan-achromatic objectives focus laser light to trap particles; motion modules move them in XYZ. Basic systems use critical illumination and standard USB3.0 color cameras for imaging/video; connecting the CMOS camera to a computer displays manipulation live. Standard systems upgrade to transmitted Köhler illumination for uniformity without source-image artifacts. Vortex systems have five sections, adding polarization to the standard design. They trap up to eight 3 μm particles simultaneously, compared with five in the standard system, and rotate particles about the optical axis. Integrated easy operation suits undergraduate/graduate teaching and research, basic experiments, and potential cell/single-molecule biology, colloids, and physics applications. Laser/illumination, imaging, stages, spectral detection, and other modules can be customized; contact support. Systems ship as modules for user assembly; fragile laser/camera modules are separately packed. Installation videos and optional online/on-site engineer assistance are available. Basic optical tweezers. Models: STS1, STS1-C. Laser 780 nm, adjustable 0-70 mW; particles 1-10 μm; 300 mm × 300 mm breadboard; three-axis 13 mm stage; 66 mm rail support; 60X/100X infinity-corrected plan-achromats. The four sections mount on a 300 mm × 300 mm aluminum breadboard with 66 mm supports. A 780 nm laser up to 70 mW is adjusted/focused through a suitable objective to trap particles. XYZ stage motion provides capture/manipulation at 10 μm precision. A precollimated mounted LEM5000K LED gives critical illumination; USB3.0 camera AIC-502C-USB records images/video. Choose a dry 60X objective, NA=0.85, WD=0.30 mm, or oil 100X, NA=1.25, WD=0.21 mm, according to material. Standard optical tweezers. Models: STS2, STS2-C. Laser 532 nm, adjustable 0-500 mW; particles 1-10 μm; 450 mm × 300 mm breadboard; differential XY at 0.5 μm precision; 66 mm support; 60X/100X plan-achromats. Four sections mount on a 450 mm × 300 mm aluminum board with 66 mm supports. Upgraded 532 nm illumination has greater photon energy and adjustable power up to 500 mW, focused to trap particles. Differential XY motion provides 0.5 μm precision. A coarse/fine Z lift sets focus at 1 μm/division minimum and maximum 2.6 kg load. Transmitted Köhler illumination uniformly lights samples without source-image artifacts. Field stops limit view/stray light; aperture stops set diameter/flux to balance resolution/depth. USB3.0 AIC-502C-USB imaging and a sliding filter holder simplify filter switching. Objectives are dry 60X, NA=0.85, WD=0.30 mm, or oil 100X, NA=1.25, WD=0.21 mm. Vortex optical tweezers. Models: STV1, STV1-C. Laser 532 nm, adjustable 0-500 mW; particles 1-10 μm; 450 mm × 300 mm board; XY travel 13 mm, precision 0.5 μm; 66 mm supports; 60X/100X plan-achromats. Five sections comprise laser, polarization, illumination, imaging, and motion control. Laser/illumination/imaging/motion follow the standard design; added polarization produces vortex output. The 532 nm beam passes a polarizer and angled 1/4-waveplate to become circular, then a vortex waveplate creates a selected topological-charge beam. A high-NA objective focuses it to trap particles, which rotate around the axis in the focal plane under phase-gradient force as stated. JCOPTIX customizes laser/illumination, imaging, stages, spectral detection, and other modules; contact support.

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