WM500

Automated Monochromator-Spectrograph

The WM500 is a long-focal, automated universal monochromator-spectrograph known for its high spectral line quality and minimal stray light.

It supports up to two input and two output ports. The input port can be equipped with either a standard input slit or an optional crossed input slot. All spectral slits are automated, with software-controlled adjustable widths. Additionally, the slits feature a micro-screw for manual fine-tuning. Depending on the configuration, the WM500 can be equipped with either a four-position diffraction grating turret or a single grating holder.

Key Features:

  • Automated Monochromator-Spectrograph WM500

    With a high aperture ratio (F/3.8), minimal stray light, and excellent line quality, the WM500 is perfectly suited for a broad range of spectroscopic applications.

    Equipped with two input and two output ports, the system can be configured with a wide selection of wavelight's accessories, including standard and crossed entrance slits, order-sorting filter wheels, aperture matching optics, optical fibers, CCD detectors, and compatible adapters.

    The WM500 imaging version ensures full astigmatism compensation and delivers high spatial resolution along the exit slit while maintaining superb spectral line quality.

    Full automation allows for software-controlled scanning, diffraction grating selection, filter wheel operation, slit width adjustment, and output port selection—all managed via intuitive, user-friendly software.

    An automatic shutter enables dark current subtraction and protects the detector from overexposure.

    Both output slits are equipped with precise focusing mechanisms, and the detector adapters allow for fine through-focus adjustment.

    The software offers full control over the WM500 and its detectors, including panoramic spectrum acquisition by stitching multiple scans. It also includes extensive tools for spectral data processing and analysis.

  • The WM500 monochromator-spectrograph supports a comprehensive range of accessories designed to maximize light collection efficiency from samples at both finite and infinite distances. These options enable optimal light delivery to the monochromator—with or without optical fibers—and ensure effective aperture matching between components.

    Available Accessories:

    • Order-sorting filter wheels

    • Aperture matching adapters

    • Condensers for coupling light into optical fibers

    • Condensers for direct light input into the monochromator

    • Crossed entrance slit (optional alternative to standard slit)

    • Optical fibers

    • CCD detector adapters

    • CCD detectors

    • Cassegrain lenses

    • Emission and fluorescence spectroscopy

    • Absorption, reflection, and transmission measurements

    • Multi-channel spectral analysis

    • High-resolution analytical tasks across the UV to IR range

Wm500 TECHNICAL FEATURES:

    • Spectral range: typical 190 – 4500 nm

    • Optical scheme: Optimized Czerny-Turner with two inputs and two outputs

    • F/Number: 1: 6.7

    • Focal length, mm: 522

    • Flat field, mm: 30 x 10

Diffraction Gratings

Diffraction gratings: 70x70x10 mm, one grating or a turret with 4 gratings from the list below*

Grooves per mm 2400 1800 1200 600 400 300
Reciprocal linear dispersion (average)2), nm/mm 0.66 1.0 1.4 2.8 2.6 4.37 3.68 5.56 5.16
Blaze wavelength, nm 225 270 400 750 1000 800 1700 1500 2000
Spectral range3), nm 190–500 190–600 260–900 480–1680 648–2250 515–1800 1095–3825 965–3375 1290–4500
Mechanical range for axial port, nm 0–640 0–850 0–1280 0–2560 0–2560 0–3840 0–3840 0–5120 0–5120
Multichannel array bandpass (average)4), nm 17 25 38 78 70 123 96 155 140
Spectral resolution (average)4), nm <0.016 <0.022 <0.035 <0.07 <0.06 <0.10 <0.09 <0.14 <0.13
Wavelength position accuracy, nm ± 0.026 ± 0.037 ± 0.057 ± 0.12 ± 0.17 ± 0.23
Wavelength repeatability, nm ± 0.021 ± 0.030 ± 0.046 ± 0.095 ± 0.135 ± 0.185
Step of grating rotation, nm 0.007 0.009 0.013 0.026 0.04 0.05
Scanning rate, nm/s 12.5 16.7 25.0 50.0 75.0 100.0
  • 1) Upon your request, diffraction gratings differing from the above can be used.
  • 2) Reciprocal linear dispersion is indicated for the blazing wavelength.
  • 3) Wavelength range for which diffraction efficiency exceeds 40%.
  • 4) For a detector with 8 µm pixel size and 29.1 mm length of active area.

    • Entrance/exit slits: Automatic and manual adjustment

    • Slit width, mm: 0 — 2

    • Slit height, mm: 12

    • Parallelism, µm: ± 1

    • Micrometer reading accuracy, µm: ± 1

    • Step size, µm: 0,001953125

    • Precision, µm: ± 1

    • Filter wheel: Automatic switching

    • Max number of filters: 8

    • Standard number of filters: 5

    • Filter size, mm: 20

    • Light aperture, mm: 16

    • Integrated shutter: Computer-controlled, serves for dark signal measuring

  • PC connection: USB 2.0

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WM600