Ames Photonics LARRY Series Ambient-Temperature Linear CCD Array Detectors (2048/3000-pixel)

Overview

The Ames Photonics LARRY Series ambient-temperature linear CCD array detectors are engineered for high-fidelity spectral acquisition in benchtop and embedded spectroscopic systems. Designed around scientific-grade monolithic CCD sensors—specifically the CCD2048, CCD2048L, and CCD3000 architectures—these detectors operate without thermoelectric cooling while maintaining low dark current and high signal-to-noise ratio (SNR) across 15–30 °C ambient conditions. Core to this performance is Ames Photonics’ proprietary Temperature-Compensated Dark Current (TCDCTM) correction algorithm, which dynamically adjusts pixel-level dark signal based on real-time sensor temperature, eliminating the need for active cooling without compromising quantitative accuracy. The detectors support both UV–Vis–NIR (200–1100 nm) and extended NIR (1520–1570 nm) detection via optimized anti-reflection and upconversion coatings, making them suitable for Raman, LIBS, absorption, and emission spectroscopy where thermal stability, reproducibility, and interface flexibility are critical.

Key Features

• Three configurable platform families: LARRY (oscilloscope/PCI/ISA compatible), LARRY-PC (PCI-bus optimized), and LARRY-USB (integrated USB 2.0 controller)
• Scientific-grade CCD sensors with zero dead pixels and edge-scatter suppression via custom microlens and passivation processing
• Pixel configurations: 2048 × 1 (CCD2048/CCD2048L) or 3000 × 1 (CCD3000), with pixel pitches of 14 µm × 14 µm, 14 µm × 200 µm, and 7 µm × 200 µm respectively
• Adjustable readout clock frequencies: 100/200/500/1000 kHz (LARRY/LARRY-PC) or fixed 1 MHz (LARRY-USB), enabling trade-offs between speed and noise
• Software-controllable integration time ranging from 0.01 ms (LARRY-USB 3000) to 8 ms minimum (other variants), with hardware-settable ranges up to 500 ms
• Analog output: 0–10 V full-scale, with programmable DC offset (0–1 V), supporting direct oscilloscope or digitizer interfacing
• External trigger input with TTL compatibility for synchronized multi-instrument acquisitions

Sample Compatibility & Compliance

The LARRY series is designed for use with optical spectrometers featuring Czerny–Turner, crossed-beam, or fiber-coupled fore-optics. Its flat-field response, low geometric distortion (<0.1% pixel deviation), and uniform quantum efficiency across the 200–1100 nm range ensure reliable calibration traceability per ISO/IEC 17025 requirements when paired with NIST-traceable light sources. The 1520–1570 nm extended NIR capability—enabled by proprietary infrared upconversion coating—is validated per IEC 61290-1-3 for telecom-band spectral characterization. All models comply with FCC Part 15 Class B and CE EMC Directive 2014/30/EU. While not certified as medical devices, the architecture supports GLP-compliant data integrity when used with SpectraArray or SpectraSolve software configured with audit trail, electronic signature, and 21 CFR Part 11–compliant user access controls.

Software & Data Management

Ames Photonics provides a complete software ecosystem for instrument control and spectral analysis. SpectraArray (D7401) delivers real-time acquisition, baseline correction, peak identification, and export to CSV, ASCII, or HDF5 formats—validated for Windows 98 through Windows 10. SpectraSolve (D7404) extends functionality with multivariate curve resolution (MCR), spectral library matching, and kinetic time-series deconvolution. For system integrators, the OEM Developer Kit (D7421) includes ANSI C++ source code, Visual Studio project templates, and API documentation supporting deterministic timing-critical applications. LabVIEW drivers (D7422) offer native VIs compatible with LabVIEW 5.x and later, including asynchronous acquisition, ROI definition, and hardware-triggered buffer management. All software packages generate timestamped metadata logs containing detector temperature, integration time, gain setting, and firmware revision—enabling full experimental reproducibility.

Applications

• UV–Vis absorption and reflectance spectroscopy in pharmaceutical QC labs (e.g., USP compliance verification)
• NIR process monitoring of polymer melt index, moisture content, and crystallinity in extrusion lines
• Raman spectral acquisition at 785 nm and 1064 nm excitation, leveraging extended NIR sensitivity for reduced fluorescence interference
• Plasma emission diagnostics in semiconductor etch chambers, where sub-millisecond temporal resolution is required
• LIBS (Laser-Induced Breakdown Spectroscopy) with gated acquisition synchronized to Q-switched laser pulses
• Custom OEM spectrometer modules for environmental gas analyzers (e.g., NO_x, CH₄) requiring stable ambient-temperature operation

FAQ

What distinguishes the CCD2048L from the standard CCD2048?
The CCD2048L features an extended vertical pixel dimension (200 µm vs. 14 µm), increasing full-well capacity to 140,000 e⁻ and reducing read noise to 122 e⁻ rms—optimized for low-light, long-integration applications.
Can the LARRY-USB operate without external power?
Yes—the LARRY-USB models draw power exclusively from the USB 2.0 bus (5 V, ≤500 mA), eliminating the need for auxiliary power supplies in portable or field-deployable systems.
Is dark current compensation applied in real time during acquisition?
Yes—TCDCTM operates continuously using on-board temperature sensing and pre-characterized dark current models; no post-processing is required to achieve SNR values up to 374:1 (CCD2048L, 1 s integration).
Are firmware updates available for legacy LARRY-PC units?
Yes—Ames Photonics maintains backward-compatible firmware revisions accessible via secure customer portal, including enhanced trigger jitter reduction and improved ADC linearity correction.
Does the OEM Developer Kit support Linux-based host systems?
No—D7421 is Windows-native only; however, the documented register-level communication protocol enables third-party Linux driver development using libusb and memory-mapped I/O.