WM200

Multi-purpose compact monochromator-spectrograph

The WM200 is a versatile, compact monochromator-spectrograph. This low-cost, short-focus instrument offers flexibility and multifunctionality, combining impressive performance specifications with essential features typically found in larger spectrographs. 

Key Features:

  • High aperture ratio (F=1:3.6)

  • Low stray light

  • Up to three diffraction gratings

  • Both output ports of the WM200 have fully functional flat field 30 × 10 mm

  • High degree of automation

  • Both WM200 exit slits are equipped with precision slit focusing units

  • Precise and easy detector focusing is provided by detector adapters

  • The Wavelight.Lab software

  • SDK, DLL

  • The WM200 features a high aperture ratio (F=1:3.6), making it suitable for a wide range of applications such as fluorescence, reflection, and transmittance measurements across the UV to IR spectral range, light source analysis, multi-channel spectroscopy, and more.

    Its low stray light, achieved through high-quality optical design and precise engineering of the instrument housing, ensures an optimal signal-to-noise ratio.

    The WM200 can accommodate up to three diffraction gratings mounted on an automated turret, allowing a broad spectral range with just one compact device.

    The two output ports feature fully functional flat fields (30 x 10mm), providing the flexibility to connect two exit slits, a slit and a multi-channel detector, or two detectors simultaneously.

    Automation in the WM200 includes scanning and changing diffraction gratings, adjusting order-separating filters, setting slit width, and performing automated background subtraction with shutter control.

    Both exit slits are equipped with precise focusing mechanisms, and detector adapters enable accurate focusing.Entrance and exit slits are interchangeable and mounted on two six-position discs. Each disc holds six pre-aligned spectral slits. To adjust the slit width, simply rotate the knob to one of the fixed positions. Two indicators on the ML44 housing display the slit widths, and the software calculates the spectral width of the line separated by the monochromator.

    The delivery set includes two optical fiber adapters and two fused silica condensers. These condensers and fiber adapters can be installed on the entrance and/or exit slits. Condensers focus light onto the monochromator's entrance slit or focus the light coming from the monochromator to the object. The fiber adapters enable light transfer to/from the monochromator via optical fibers (SMA-905 connectors), with optical fibers available upon request.

  • The WM200 monochromator-spectrograph offers a wide range of options and accessories for efficient light collection from both finite and infinite distances. It can deliver light to the monochromator with or without the use of optical fibers, ensuring effective aperture matching between the optical fiber and the monochromator.

    Key accessories include:

    • Order Separating Filters Wheels

    • Aperture Matching Adapters

    • Condensers for light collection into the fiber

    • Condensers for light collection into the monochromator

    • Crossed Entrance Slit (optional instead of the Standard Entrance Slit)

    • Optical Fibers

    • Adapters for attaching CCD detectors

    • CCD detectors

    • Cassegrain lenses

Wm200 TECHNICAL FEATURES:

  • Spectral range: Typical 190 – 3600 nm, extended up to 15um at your request

    • Optical scheme: Optimized Czerny-Turner with one optical input and two outputs

    • F/Number: 1 / 3.6

    • Focal length, mm: 142

    • Flat field, mm: 30 x 10

    • Imaging: Option. Available on both output ports.

Diffraction Gratings

Diffraction gratings: 40x40x10mm, turret with 3 gratings from the list below*

Grooves/mm1) 1800 1200 900 600 600 400 300 200 100 100
Blaze wavelength (nm) 270 400 600 750 1000 800 1500 1500 2000 500
Reciprocal linear dispersion (nm/mm) 3.2 4.9 6.4 9.8 9.4 15.2 20.1 30.4 63 68
Spectral range2) (nm) 190–540 265–800 400–1200 500–1500 660–2000 530–1600 1000–3000 1000–3000 1330–4000 330–1000
Multichannel array bandpass (nm) 813) 1263) 1653) 2503) 1204) 1944) 2574) 3884) 8004) 8704)
Spectral resolution (nm) 0.23) – 0.135) 0.33) – 0.25) 0.43) – 0.275) 0.63) 0.64) 0.954) 1.254) 1.94) 3.84) 4.24)

1)Diffraction grating with an alternate number of grooves per mm/blaze wavelength can be used upon your request.

2)Wavelength range with diffraction efficiency higher than 40%.

3)For the detector with 25um pixel size and 25.6 mm of active area.

4)For the detector with 25um pixel size and 12.8 mm of active area.

5)For the detector with 8um pixel size and 29.1 mm of active area.

  • Slit System (Entrance/Exit)

    • Entrance silte slit: software-controlled adjustment from 0 to 3 mm, 10mm height

    • Exit silte: micrometer-driven from 0 to 3 mm, 10 mm height

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

    • Computer interface: Full-Speed USB interface

    • Dimensions: 308 Ñ… 226 Ñ… 188 mm

    • Weight: 8 kg

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