WM100

High-Aperture Compact Monochromator

The WM100 is a compact, high-aperture, short-focus monochromator that operates across the spectral range of 190-1200nm. When paired with a light source, the WM100 serves as an effective monochromatic illuminator for fluorescence excitation. 

Key Features:

  • Extremely high aperture

  • Change slits on the fly

  • Compact size and light weight

  • Versatile optical interface

  • Extended delivery set, including condensers and fiber adapters

  • The WM100 monochromator features two diffraction gratings mounted on a single rotation axis, with automated spectrum scanning and diffraction grating switching. The wavelength for automatic grating switching is set by the user through the instrument's software.

    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 WM100 monochromator has a wide range of options and accessories that provide efficient light collection from the sample located at a finite distance and at infinity, delivering emission to the monochromator with and without an optical fiber, effective aperture matching of the optical fiber and monochromator.

    Cassegrain lenses allow collecting light from objects located at a distance of 3.5m to infinity.

    Adapters PS-2 and PS-3 are designed for the collection of light from a closely located sample and its effective input into an optical fiber. PS-2 features high transmittance in the UV range, while PS-3 has the possibility of installing an edge filter.

    •     Aperture Matching Adapters

    •     Condensers for collecting light into the fiber

    •     Condensers for collecting light into the monochromator

    •     Optical Fibers

    •     Cassegrain lenses

    • Efficient spectral selection in the investigation of detectors and light sources.

    • A tunable narrow-band filter for broadband fluorescence excitation sources.

    • An order separation pre-disperser in spectral instruments with Echelle diffraction gratings.

    • Integration into various research and analytical equipment operating in the UV, visible, and NIR spectral ranges.

    • Spectroscopy education at colleges and universities.

Wm100 TECHNICAL FEATURES:

  • Spectral range, nm: 190-1200

  • Diffraction gratings

  • Size, mm: 25 x 25 x 6

  • Spectral interval chosen by WM100 at width of entrance and exit slits (average)

  • Wavelength of automatic change of grating, nm: 600 (program-controlled)

Lines/mm 1200 600
Blazing wavelength (nm) 300 500
Reciprocal linear dispersion (nm/mm) 18.7 34.7
Operating spectral range (nm) 190–600 600–1200
Tuning step by spectrum (nm) 0.125 0.25
Wavelength accuracy (nm) ±1.0 ±1.5
Wavelength repeatability (nm) ±0.25 ±0.5
Scanning speed (nm/s) 200 400
Slit 20 µm 0.35 0.7
Slit 50 µm 0.9 1.8
Slit 100 µm 1.8 3.5
Slit 250 µm 4.5 8.9
Slit 500 µm 9.0 17.7
Slit 1000 µm 18.0 35.5

    • Focal length of the collimator and camera lenses, mm: 44,2

    • Aperture ratio: 1 / 2,9

    Optical input/output

    • Optical fiber SMA-905

    • condenser F = 16mm

    • Tuning step by angle, deg: 0,01875

    • Wavelength switching time, s

      • Minimal: 0.001

      • Maximum: 38.4

    • Entrance / exit slits (changeable)

    • Slit width, mm:
      0,02; 0,05; 0,1; 0,25; 0,5; 1,0

    • Slit height, mm: 3,0

    • PC connection: USB

    • Dimensions, mm: 138,5 x 114 x 147

    • Weight, kg: 2,1

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