- Low cost
- Small foot print
- Monochromator or imaging spectrograph
- Manual or automated
- Optional second exit port
- USB 2.0 interface
The MicroHR comes available with two different choices for manual slit assemblies, either fixed or micrometer adjustable slits. A manually adjustable height limiter allows the user to quickly shut or open the light path to 1 mm and 15 mm heights. You can add accessories to the MicroHR series spectrometers to obtain optimum results for a variety of applications. To attach the accessories to the MicroHR, use the two tapped holes on the body of the slit. These holes are also useful for connecting the MicroHR with your experiments and equipment. When connecting with the iHR, it is important to know the distance from the mounting face of the slit’s body to the slits.
Fixed Slit Assembly
The fixed slit assembly can hold different slit inserts ranging in physical size from 12 to 4000 microns. See below for corresponding bandpasses (grating dependent).
Micrometer Adjustable Slit Assembly
World Class Diffraction Gratings Manufactured by HORIBA
A Proud Tradition of Excellence
Since the acquisition by HORIBA of Jobin Yvon, a spectroscopy company founded in 1819, HORIBA Scientific has continued to define the leading edge of the Optics of Spectroscopy.
For the last 40 years HORIBA Scientific has taken a leading position in the design, development and manufacture of master and replica diffraction gratings. HORIBA Scientific diffraction gratings are found in both high volume OEM instruments and in world class cutting edge scientific applications. Our pattern of leadership in optics has been hallmarked by the continuing development of both classically ruled and holographic diffraction grating technologies. This led to the introduction in 1967 of the aberration corrected holographic grating and subsequently ion etched and blazed concave and plane holographic gratings.
The MicroHR series of spectrometers take full advantage of the highest quality of gratings that HORIBA designs and manufactures.
A Vast Array of Choices
There is a wide selection of gratings to choose from depending on optical requirements. Gratings are 32 x 32 mm for the MicroHR. There are three different types of gratings available; classically ruled, holographic, and blazed holographic. There is also a flat mirror that may be ordered for the dual grating turret option.
Select for applications where high throughput or low groove density is required, or when working in the infrared. Typically, they have high throughput at the cost of higher stray light.
Available in higher groove densities for finer resolution requirements and are excellent choices for experiments with laser excitation such as Raman or laser induced photoluminescence. They provide the lowest possible stray light possible, sometimes at the cost of lower throughput.
Blazed holographic gratings
These gratings have the same advantages as holographic gratings with better throughput.
Ruled gratings and blazed holographic gratings have two fundamental parameters to choose from; the groove density, expressed in grooves (or lines) per millimeter, and the blaze angle which nominally refers to the peak reflectance wavelength expressed in nanometers.
The groove density of the selected grating affects the resolution and mechanical scanning range of the monochromator. Below is a reference chart showing the affect groove density has on the mechanical scanning range of the monochromator as well as the reciprocal linear dispersion of the slits.
Wavelength Conversion Factor
Typical Linear Dispersion
Typical Array Resolution
Typical Spectral Coverage
Typical Spectral Range
≤ .15 nm
≤ .3 nm
≤ .4 nm
≤ .6 nm
≤ 1.2 nm
≤ 2.4 nm
*Values measured for MicroHR gratings using a 1024 element array with a 26 µm wide pixels and 12 µm entrance slit.
The automated version of the MicroHR has a dual grating turret allowing you to select two different gratings, to optimize throughput in different wavelength ranges and provide multiple options for different resolution requirements. The grating turret assembly can be easily replaced with a different turret assembly to extend the wavelength range or resolution of the MicroHR.
Below is a comprehensive list of available gratings for the MicroHR series of spectrometers. Other gratings are also available upon request.
Groove Density L/mm
Recommended Spectral Range
510 01 X36
510 03 X36
510 08 X36
510 91 X36
2.2 - 9 um
3.5 - 10 um
4 - 10 um
510 28 X36
5 - 10 um
510 29 X36
1.7 - 4.5 um
3 - 10 um
4.5 - 12 um
1.7 - 6 um
510 33 X36
3 - 13 um
510 34 X36
5 - 14.5 um
510 35 X36
2 - 8 um
5.5 - 17 um
510 37 X36
8 - 19 um
7.5 - 13 um
9 - 24 um
3 - 12 um
8 - 22 um
11 - 28 um
15 - 30 um
14 - 30 um
510 45 X36
510 46 X36
510 47 X36
Groove Density L/mm
Recommended Spectral Range
Blazed Holographic Gratings
Groove Density L/mm
Recommended Spectral Range
530 19 X36
530 34 X36
The Diffraction Grating Calculator below can be used to determine the various optical performance specifications of HORIBA spectrometers when used in conjunction with selected spectroscopy cameras, point detectors and various grating alternatives. It is a very useful tool with pull down selections of all of our current spectrometers, cameras and gratings.
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.
HORIBA’s world renowned software platform, LabSpec is ideal for most Raman and photoluminescence applications. It offers advanced capabilities, with expert functionality, control and flexibility. LabSpec is the first choice for most spectrometer customers.
SynerJY™ software is a fully integrated data acquisition and data analysis program for spectroscopic systems. It is selected for custom spectroscopy configurations not suitable for LabSpec.
LabVIEW VI’s are now available for the complete line of instrumentation from the Optical Spectroscopy Division, allowing users to work with the LabVIEW™ development package from National Instruments. This option requires proficiency with LabVIEW™ programing.
Software Development Kits (SDK’s) are available for programmers who wish to write their own software control of HORIBA spectrometers. This option absolutely requires proficiency with programing
Compatible Optical Building Blocks
The MicroHR series spectrograph is one of many inter-connectable Optical Building Blocks available from HORIBA Scientific. These Optical Building Blocks can be ordered together to form a subassembly or even a complete custom spectroscopy solution.
The MicroHR series can be provided with ational C-Mount coupler accessory for the exit port that allows it to be coupled to cameras that use a C-Mount thread. It can also be equipped with an entrance side C-Mount coupler so that it can be directly attached to a microscope with an appropriate C-Mount detection port.
Fiber Light Guides
We offer a selection of fiber optic and liquid light guides to choose from depending on the application.
Lens based fiber-coupler with f/# matching optics for SMA and ferrule (part number 220F, or 220F-AFC for FC Mount fibers).
Direct fiber-coupler with no optics for 10 mm and 0.25″ ferrule with thumbscrew x-y adjusters, (part number AFO-XY)
Mirror based fiber-coupler for 10 mm ferrule (part number J23078640). Contact us for information about SMA and FC adapters.
Simple fiber-adapter for 0.25″ ferrule (part number 120F).
Internal Filter Wheels
The MicroHR comes available with two different optional internal filter wheels which are positioned at the entrance port of the MicroHR spectrometer.
MicroHR 5 Position Motorized Internal Filter Wheel with three 3 mm X 25.4 mm diameter filters :
MicroHR 5 Position Motorized Internal Filter Wheel with two 1 mm X 25.4 mm diameter filters :
If you would like to use an optical chopper with your spectrograph/monochromator, then we have a number of solutions. To learn more click here.
Single Channel Detectors
HORIBA offers a comprehensive array of single point detectors for a wide variety of applications in spectroscopy and biomedical research. These are complete detectors including housings, power supplies and facility for cooling if necessary. Used in conjunction with our monochromators and spectrographs these detectors allow you to configure a custom solution for your unique requirements. To learn more, click here.
HORIBA Scientific offers a complete line of spectroscopic multi-channel detectors for scientific research. For spectral detection from UV to near-IR, two dimensional CCDs and indium gallium arsenide linear arrays offer a faster acquisition option over single point detectors with very high sensitivity. Coupled with HORIBA’s range of aberration corrected, flat field imaging spectrographs, custom spectroscopy packages can be assembled for a variety of applications. To learn more, click here.
Broad Band Light Sources
HORIBA Scientific has an excellent selection of broadband light sources. If you would like to couple the spectrograph/monochromator to one of these light sources, then we have adapters to physically connect them and create a tunable illuminator. To learn more about our broad band light sources, click here. Incidentally, if you are looking for such a tunable illuminator we have a separate page describing our compact tunable illuminator, and our ultimate KiloArc™ tunable illuminator.
If you would like to couple your spectrograph/monochromator to a sample compartment, then we have a number of solutions. To learn more click here.