DCS540 optical chopper
WaveQuanta

DCS540 Optical Chopper System, 20 Hz–5 kHz, 0.01 Hz Resolution

DCS540
Contact for pricing
In Stock
Contact Sales

Design Tools

Photonics Calculators Explore 49 free online calculators for photonics design Unit Converters Convert between wavelength, frequency, power, and more
View all 49 calculators →
RoHS REACH

Optical chopper with interchangeable blades that modulates light for lock-in detection, with TTL/CMOS reference I/O.

The DCS540 optical chopper modulates a light beam at frequencies set with 0.01 Hz resolution, providing the reference signal for lock-in detection. A 2.4-inch LCD and a single encoder knob handle local operation, and all functions can also be controlled and read over USB. Interchangeable blades with 2 to 60 slots cover different frequency ranges, including a dual-frequency inner/outer blade.

Key Features

  • Chopping frequency 20 Hz–5 kHz; blade options from 1 Hz (2-slot blade)
  • 0.01 Hz frequency resolution, 250 ppm/°C typical frequency stability
  • 2.4-inch 320 × 240 LCD with 6-digit frequency display
  • Single photoelectric encoder knob for operation
  • BNC input and output, standard TTL/CMOS compatible
  • RS-232-to-USB interface; all functions controllable via USB
  • Six blade options, including a dual-frequency 5/7-slot blade

Typical Applications

  • Lock-in detection of optical signals
  • Modulating light for PbS, InSb and MCT infrared detectors
  • Monochromator-based spectral measurements
  • Phosphorescence measurements with photon counters

Model Overview

Blade Slots Frequency Range Standard
DCS540-01 2 1–99 Hz –
DCS540-02 10 20 Hz–1 kHz Yes
DCS540-03 15 30 Hz–1.5 kHz Yes
DCS540-04 30 60 Hz–3 kHz Yes
DCS540-05 60 120 Hz–5 kHz –
DCS540-06 Inner 5 / outer 7 Inner 10–500 Hz / outer 14–700 Hz –

Related Products

  • DCS500PA — Digital Lock-in Amplifier

Browse all: Lock-In Amplifiers

Models: DCS540, DCS540-01, DCS540-02, DCS540-03, DCS540-04, DCS540-05, DCS540-06 · Contact WaveQuanta for a quote, configuration advice and lead time.

Chopping Frequency 20 Hz–5 kHz (1–99 Hz with DCS540-01 blade)
Frequency Resolution 0.01 Hz
Frequency Stability 250 ppm/°C (typ.)
Frequency Drift Below 1%
Operation Single photoelectric encoder knob
Operating Temperature 10–40 °C
Display 2.4-inch, 320 × 240 LCD; 6-digit frequency display
Input and Output Connectors BNC
I/O Compatibility Standard TTL/CMOS level
Input Voltage 0–5 V
Input High Level Above 3.6 V
Input Low Level Below 0.4 V
Min. Load Resistance 500 Ω
Interface RS-232 to USB; all functions controllable and readable via USB
Power Supply 220 VAC ±10%, 50 Hz ±0.2 Hz, below 30 W
Dimensions (W × D × H) 206 × 150 × 70 mm
Specification Sheet PDF — Download
No CAD drawings available for this product.
DInSb Series ln2-cooled insb infrared detector
WaveQuanta

DInSb Series Liquid-Nitrogen-Cooled InSb Detectors, 1–5.5 µm

DInSb Series
Contact for pricing
Contact Sales

Product Family: Lock-In amplifier (3 variants)

Product ▴▾ SKU Size ▴▾ Clear Aperture ▴▾ Operating Wavelength ▴▾
DCS540 Optical Chopper System, 20 Hz–5 kHz, 0.01 Hz Resolution Current DCS540 — — —
DCS500PA Digital Lock-in Amplifier, 50 mHz–120 kHz, 1 nV–1 V Sensitivity DCS500PA — — —Contact
Digital Lock-in Amplifier Melab Melab — — —View