MicroHR Series: Short Focal Length Imaging Spectrometers

HORIBA’s MicroHR spectrometer, which can be used as a scanning monochromator or an imaging spectrograph, provides exceptional performance and versatility in a compact and reasonably priced package.

The most effective gratings are used in these spectrometers, which are likewise created and produced by HORIBA.

A rugged, high throughput optical system, the MicroHR is an ideal, affordable tool for a wide range of spectroscopic applications such as:

  • UV-NIR Absorption
  • Laser characterization
  • Fluorescence
  • Atmospheric studies
  • Source characterization


Key Benefits of the MicroHR Series Spectrometers:

  • USB 2.0 interface on automated versions
  • Configurable to user requirements
  • 140 mm f/3.9 Czerny-Turner with imaging optics
  • Rugged solid-milled construction
  • Interchangeable dual grating turrets


Depending on the optical requirements, there is a large array of gratings to pick from.  The MicroHR uses 32×32 mm gratings. There are three types of gratings: holographic, blazed holographic, and classically ruled. The dual grating turret option also allows for the ordering of a flat mirror.

Computer Control

In addition to wavelength control, the MicroHR has an optional automated turret control and automated control of the optional internal five-position filter wheel. There are multiple software platforms to choose from for spectrometer control and acquisition.

Optical Accessories

The MicroHR can be used with a wide range of optical accessories to create a unique solution.


Source: HORIBA Scientific

  MicroHR (Manual) MicroHR (Auto)
Focal Length 140 mm 140 mm
Entrance Aperture Ratio f/3.88 f/3.88
Grating Mount Interchangeable single grating Interchangeable dual grating turret
Grating Size 32 mm x 32 mm 32 mm x 32 mm
Scanning Range** 0 – 1000 nm 0 – 1500 nm
Multi-channel coverage** 140 nm over 26.7 mm array 140 nm over 26.7 mm array
Focal Plane 27 mm wide x 10 mm high 27 mm wide x 10 mm high
Image Magnification at Exit Slit 1.1 1.1
Spectral Dispersion** 5.25 nm/mm at 400 nm 5.25 nm/mm
Spectral Resolution  0.3 nm (w/ 26 µm pixel array) 0.25 nm (w/ exit slit & PMT)
Wavelength Accuracy** ± 0.5 nm ± 0.25 nm
Wavelength Repeatability** ± 0.15 nm ± 0.04 nm
Slits Fixed or micrometer Fixed or micrometer
Computer Interface   USB 2.0
Dimensions: Length 7 in (178 mm) 7 in (178 mm)
Width 6 in (152 mm) Single Exit 8.1 in (206 mm), Dual Exit 10.5 in (267 mm)
Height 5.5 in (140 mm) 5.5 in (140 mm)**
Optical Axis Height 3.5 in (89 mm) 3.5 in (89 mm)
Weight 8.8 lb (4.0 kg) Single Exit 10.0 lb (4.5 kg), Dual Exit 11.0 lb (5.0 kg)


All measurements were taken at 633 nm
* Actual coverage on the array is 200 nm to 1400 nm, however, the detector is sensitive only to 1100 nm
** for 1200 g/mm grating at 400 nm

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