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HINDS DPEM-460A 4022.455.16351

Product Introduction:​ The DPEM-460A is an electronic driver unit produced by Hinds Instruments for use with a Photoelastic Modulator (PEM) optical element. It generates a high-frequency sinusoidal drive voltage to induce periodic birefringence in the PEM crystal, thereby modulating the polarization state of a light beam passing through it. Widely used in spectroscopic ellipsometry, circular dichroism, and pump-probe experiments.

Category:
Description
Technical Specifications & Performance Parameters:
  • Drive Voltage Output:​ 0 – 100 Vppadjustable (sinusoidal)
  • Modulation Frequency Range:​ Typically 1 kHz – 50 kHz (fixed tuned to PEM resonant frequency, e.g. 50 kHz or 42 kHz depending on PEM model)
  • Frequency Stability:​ ±0.01 % over 8-hour period; long-term drift < 0.1 %
  • Phase Lock Input:​ TTL-compatible sync/output for lock-in amplifier referencing
  • Setpoint Controls:​ Front-panel or remote (via rear DB-9 / BNC) frequency and amplitude setpoints
  • Warm-up Time:​ < 30 minutes to rated stability
  • Power Requirement:​ 100/120/220/240 V AC, 50/60 Hz, approx. 30 – 50 VA
Material & Structural Features:
  • Enclosure:​ Benchtop metal chassis (usually painted steel/aluminum), with ventilation slots
  • Front Panel:​ LCD or LED display of frequency/amplitude, adjustment knobs, power switch
  • Rear Panel:​ BNC sync I/O, PEM cable connector (special Hinds multi-pin), power inlet (IEC 320), fuse holder
  • Dimensions (Typical):​ Approx. 216 mm (W) × 89 mm (H) × 305 mm (D) (half-rack benchtop)
  • Weight:​ Approx. 3 – 4 kg
Operating Conditions & Installation Requirements:
  • Operating Temp.:​ 0 °C to +50 °C (recommended 15–35 °C for best stability)
  • Humidity:​ < 80 % RH non-condensing
  • Installation:​ Benchtop or rack-mounted (with adapter); keep away from strong EMI sources; allow ≥5 cm clearance for cooling vents
  • Calibration:​ Factory calibrated to specific PEM crystal resonant frequency; do not interchange PEM heads without recalibration
Application Scenarios:​ Polarization modulation spectroscopy, magnetic circular dichroism (MCD), stress birefringence measurement, pump-probe femtosecond experiments, Fourier transform infrared (FTIR) PEM-based measurements.
Notes / Precautions:
  • The DPEM-460A must be paired with the correct PEM resonant at the factory-set frequency.
  • Avoid operating the PEM at excessive drive voltage beyond manufacturer recommendation to prevent crystal damage.
  • Allow full warm-up before taking measurements for wavelength-critical work.
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