LKC BigShot LED Ganzfield Tabletop Stimulator

LKC Technologies BigShot Portable Tabletop LED Ganzfeld Stimulator. A high-precision, multi-wavelength full-field photic stimulator engineered to deliver calibrated, highly uniform flash and background illumination for standard and customized electrophysiological testing of the visual system.

Used; excellent condition.

• Manufacturer & Line: LKC Technologies / Visual Electrophysiology Systems (UTAS & SunBurst Series)
• Optical Design & Field Uniformity: True Ganzfeld integrating sphere geometry with an interior matte high-reflectance optical coating, providing 100% full-field visual stimulation without shadows or luminance gradients across the entire retinal field
• Illumination Source & Spectrum: Solid-state high-output light-emitting diode (LED) array; features computer-controlled multi-chromatic illumination including white, red (630 nm), green (530 nm), and blue (470 nm) stimuli, with xenon-flash emulation capability
• Luminance Dynamic Range & Calibrated Output: Broad dynamic attenuation spanning over 6 log units, supporting:
  • Scotopic / Dim Flash Range: Down to 0.0001 cd·s/m² for dark-adapted rod threshold assessments
  • Photopic / High-Intensity Range: Up to 1000 cd·s/m² for intense cone-driven and flash-evoked responses
  • Background Luminance: Precisely regulated steady background fields from 0.005 to 500 cd/m² for scotopic and photopic adaptation steps
• Fixation & Subject Monitoring: Integrated dim red LED central/target fixation point with an infrared (IR) illumination array and integrated IR camera mount for live pupil tracking and eye alignment monitoring in complete darkness
• Standards & Regulatory Compliance: Fully compliant with the International Society for Clinical Electrophysiology of Vision (ISCEV) standards for clinical and research electroretinography
• Hardware & System Integration: Interfaces directly via dedicated trigger and communication cabling with LKC UTAS Visual Diagnostic Testing systems and software; features external trigger I/O BNC connectivity for synchronization with third-party signal acquisition hardware and neurophysiology amplifiers
• Form Factor & Ergonomics: Compact, tabletop-mountable enclosure with an adjustable subject headrest/chinrest assembly, designed for portable or bench-restricted clinical suites, preclinical animal setups, and modular research laboratories
• Primary Application: Flash Electroretinography (ERG), Photopic Negative Response (PhNR), Scotopic Threshold Response (STR), Visual Evoked Potentials (VEP), toxicological visual screening, retinal disease phenotyping, and preclinical animal visual physiology