ZOLIX DField-VS-A4 Cooled Scientific CCD Camera

Overview

The ZOLIX DField-VS-A4 is a high-performance, thermoelectrically cooled scientific CCD camera engineered for low-light spectral and imaging applications in research-grade optical systems. Built upon a front-illuminated, full-frame CCD sensor architecture, it employs multi-stage Peltier cooling to achieve stable operation at –60 °C under ambient conditions of 25 °C—significantly suppressing thermal dark current generation without requiring liquid nitrogen or cryogenic infrastructure. Its 2048 × 264 pixel array delivers a 30.7 mm wide active imaging area—optimized for spectroscopic slit imaging and monochromator output coupling—while maintaining high spatial fidelity through uniform 15 µm square pixels. The device operates on the fundamental principle of photon-to-electron conversion in silicon, with charge integration followed by correlated double sampling (CDS) readout to minimize reset noise and enhance signal integrity. Designed for integration into OEM spectrometers, Raman systems, and fluorescence lifetime setups, the DField-VS-A4 meets the demanding requirements of quantitative photon counting where stability, linearity, and temporal reproducibility are critical.

Key Features

• Thermoelectric cooling to –60 °C (ΔT = 85 K below ambient), enabling ultra-low dark current (<0.1 e⁻/pixel/s) for long-exposure acquisitions
• Peak quantum efficiency of 95% at 800 nm—maximizing near-infrared sensitivity for applications including NIR spectroscopy and silicon-bandgap-limited detection
• Large-format 30.7 mm width imaging area—compatible with standard 30 mm spectrograph entrance slits and grating-based dispersion geometries
• Low-noise readout architecture: <8 e⁻ RMS read noise at 500 kHz pixel clock rate; <5 e⁻ typical under optimized binning and slow-scan conditions
• 16-bit analog-to-digital conversion with >90 ke⁻ full-well capacity—supporting high dynamic range across weak and strong signal regimes
• Flexible triggering: internal clock, external TTL edge-triggered acquisition, and programmable exposure synchronization for time-resolved measurements

Sample Compatibility & Compliance

The DField-VS-A4 is compatible with vacuum-compatible and temperature-stabilized optical enclosures when integrated into custom instrumentation platforms. Its mechanical footprint and USB 2.0 interface conform to industrial standards for modular detector integration. While not certified as a medical or IVD device, the camera supports GLP-compliant data acquisition workflows when used with validated software environments. Its electrical design complies with CE EMC Directive 2014/30/EU and RoHS 2011/65/EU. For regulated analytical applications—including those governed by ASTM E131, ISO/IEC 17025, or FDA 21 CFR Part 11—the system requires traceable calibration documentation and audit-trail-enabled acquisition software, which can be implemented via third-party SDKs or ZOLIX’s native API.

Software & Data Management

The camera is supported by ZOLIX’s cross-platform SDK (Windows/Linux/macOS) offering low-level register access, real-time frame buffering, and hardware-timed exposure control. It integrates seamlessly with common scientific computing environments including MATLAB, Python (via PyUSB or custom ctypes bindings), and LabVIEW. Raw 16-bit image data is delivered in FITS or TIFF format, preserving linear response and metadata (exposure time, temperature, gain setting, timestamp). Optional firmware updates enable extended dynamic range modes and improved CDS timing sequences. All acquisition parameters—including trigger latency, ROI selection, and binning configuration—are programmable and persist across power cycles, ensuring repeatable experimental conditions across multi-day measurement campaigns.

Applications

• Raman spectroscopy: High QE at 785 nm and 830 nm excitation wavelengths enables efficient Stokes-shifted signal capture with minimal integration time
• UV-Vis-NIR absorption and emission spectroscopy: Wide spectral response (200–1100 nm) combined with deep cooling allows sub-picoamp photocurrent-equivalent detection limits
• Fluorescence lifetime imaging (FLIM) support: Sub-millisecond shutter accuracy and TTL-synchronized gate control facilitate time-gated acquisition protocols
• Plasma diagnostics and laser-induced breakdown spectroscopy (LIBS): Robust against electromagnetic interference and capable of single-shot spectral recording up to 60-minute exposures
• OEM integration in portable spectrometers: Compact form factor, 12 V DC power requirement (<50 W), and USB 2.0 interface simplify embedded deployment

FAQ

What is the maximum usable exposure time for quantitative measurements?
The DField-VS-A4 supports integration times up to 3600 seconds (60 minutes) with active cooling maintained at –60 °C; however, for optimal SNR in routine spectroscopy, exposures exceeding 300 seconds should include dark-frame subtraction using temperature-matched reference acquisitions.
Is the sensor back-illuminated?
No—the DField-VS-A4 uses a front-illuminated CCD architecture optimized for cost-effective, high-QE performance in the visible-to-NIR range; back-illuminated variants are available upon request for UV-enhanced applications.
Does the camera support hardware binning?
Yes—horizontal and vertical binning modes are supported in firmware, enabling trade-offs between resolution, frame rate, and read noise depending on application-specific SNR requirements.
Can the camera operate in vacuum environments?
The standard enclosure is not vacuum-rated; however, ZOLIX offers custom hermetic housings with CF flange mounts for UHV-compatible integration (base pressure ≤10⁻⁷ mbar) upon engineering consultation.
Is there a Linux driver available?
Yes—ZOLIX provides open-source-compatible kernel modules and user-space libraries for ARM64 and x86_64 architectures, including ROS2 node wrappers for robotic spectroscopy platforms.