MicroHR Series Spectrographs

Excellent Low Cost 140 mm Focal Length Imaging Spectrographs

Available as an imaging spectrograph or a scanning monochromator, HORIBA’s MicroHR spectrometer offers excellent flexibility and performance in a small and affordable package. These spectrometers benefit from the highest quality of gratings, also designed and manufactured by HORIBA. A rugged, high throughput optical system, the MicroHR is an ideal, affordable tool for a wide range of spectroscopic applications.

Two configurations to choose from

Manual

Automated

Benefits

Low cost
Small foot print
Monochromator or imaging spectrograph
Manual or automated
Optional second exit port
USB 2.0 interface

Overview

Single entrance and one or two exits

This Czerny-Turner designed spectrometer features a toroidal collimating mirror for excellent image quality.

Hardware

Monochromator Hardware

Slits

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

Gratings

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.

Ruled gratings	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.
Holographic gratings	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.

Groove Density

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.

Groove Density (gr/mm)	Wavelength Conversion Factor	Typical Linear Dispersion (nm/mm)	Typical Array Resolution (nm)*	Typical Spectral Coverage (nm)*	Typical Spectral Range (nm)*
2400	1/2	2.63	≤ .15 nm	70	0-500
1800	2/3	3.50	≤ .2nm	93	0-667
1200	1	5.25	≤ .3 nm	140	0-1000
900	4/3	7.00	≤ .4 nm	186	0-1333
600	2	10.5	≤ .6 nm	280	0-2000
300	4	21.0	≤ 1.2 nm	560	0-4000
150	8	42.0	≤ 2.4 nm	1120	0-8000

*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.

Ruled Gratings

Groove Density L/mm	Blaze Wavelength	Recommended Spectral Range	Blaze Angle	Part Numbers
1800	300 nm	150-600 nm	17°27'	510 01 X36
1800	500 nm	250-850 nm	26°45'	510-02-X36
1800	630 nm	350-850 nm	34°32'	510 03 X36
1200	250 nm	150-500 nm	8°38'	510-04-X36
1200	330 nm	200-700 nm	11°25'	510-05-X36
1200	400 nm	200-800 nm	13°53'	510-06-X36
1200	500 nm	250-950 nm	17°27'	510-07-X36
1200	630 nm	350-1200 nm	22°12'	510 08 X36
1200	750 nm	400-1200 nm	26°45'	510-09-X36
1200	1µm	500-1200 nm	36°52'	510-10-x36
900	350 nm	200-700 nm	9°00'	510 91 X36
900	550 nm	250-1100 nm	14°30'	510-93-X36
900	1.5 µm	600-1700 nm	42°27'	510-97-X36
600	300 nm	200-600 nm	5°10'	510-11-X36
600	400 nm	250-800 nm	6°54'	510-12-X36
600	500 nm	250-1000 nm	8°38'	510-13-X36
600	750 nm	400-1500 nm	13°00'	510-14-X36
600	1µm	500-1700 nm	17°27'	510-15-X36
600	1.5 µm	750-2400 nm	26°45'	510-16-X36
600	2 µm	1000-2400 nm	36°52'	510-17-X36
300	250 nm	150-500 nm	2°09'	510-50-X36
300	500 nm	300-950 nm	4°18'	510-18-X36
300	600 nm	350-1300 nm	5°10'	510-19-X36
300	1 µm	700-2000 nm	8°38'	510-20-X36
300	2 µm	1100-4500 nm	17°27'	510-21-X36
300	3 µm	1700-5000 nm	26°45'	510-22-X36
300	4 µm	2000-5000 nm	36°52'	510-23-X36
150	500 nm	250-950 nm	2°09'	510-49-X36
150	1-2 µm	800-2300 nm	5°10'	510-24-X36
150	2 µm	1200-4000 nm	8°38'	510-25-X36
150	4 µm	2.2 - 9 um	17°27'	510-26-X36
150	5 µm	3.5 - 10 um	22°01'	510-27-X36
150	6 µm	4 - 10 um	26°45'	510 28 X36
150	8 µm	5 - 10 um	36°52'	510 29 X36
120	2-5 µm	1.7 - 4.5 um	8°39'	510-30-X36
120	5 µm	3 - 10 um	17°27'	510-31-X36
120	7-5 µm	4.5 - 12 um	26°45'	510-32-X36
100	450 nm	250-950 nm	1°17'	510-48-X36
100	3 µm	1.7 - 6 um	8°38'	510 33 X36
100	6 µm	3 - 13 um	17°27'	510 34 X36
100	9 µm	5 - 14.5 um	26°45'	510 35 X36
75	4 µm	2 - 8 um	8°38'	510-36-X36
75	8 µm	5.5 - 17 um	17°27'	510 37 X36
75	12 µm	8 - 19 um	26°45'	510-38-X36
60	10 µm	7.5 - 13 um	17°27'	510-39-X36
60	15 µm	9 - 24 um	26°45'	510-40-X36
50	6 µm	3 - 12 um	8°38'	510-41-X36
50	12 µm	8 - 22 um	17°27'	510-42-X36
50	18 µm	11 - 28 um	26°45'	510-43-X36
50	24 µm	15 - 30 um	36°52'	510-44-X36
40	22-5 µm	14 - 30 um	26°45'	510 45 X36
30	30 µm	N/A	26°45'	510 46 X36
20	45 µm	N/A	26°45'	510 47 X36

Holographic Gratings

Groove Density L/mm	Recommended Spectral Range	Part Numbers
3000	250-450 nm	520-09-X36
2400	300-600 nm	520-12-X36
2400	170-500 nm	520-13-X36
2400	100-300 nm	520-14-X36
2000	450-650 nm	520-15-X36
2000	190-650 nm	520-16-X36
2000	150-450 nm	520-17-X36
2000	100-300 nm	520-18-X36
1800	450-850 nm	520-19-X36
1800	190-700 nm	520-20-X36
1800	150-450 nm	520-21-X36
1800	100-300 nm	520-22-X36
1200	400-1200 nm	520-24-X36
1200	190-700 nm	520-25-X36
1200	150-450 nm	520-26-X36
600	400-1300 nm	520-29-X36
150	250-800 nm	520-32-X36
150	400-1200 nm	520-33-X36

Blazed Holographic Gratings

Groove Density L/mm	Blaze Wavelength	Recommended Spectral Range	Part Number
2400	250 nm	190-600 nm	530-13-X36
2400	330 nm	200-600 nm	530-11-X36
2400	400 nm	300-600 nm	530-15-X36
1800	500 nm	450-850 nm	530 19 X36
1800	250 nm	180-650 nm	530-20-X36
1800	400 nm	250-850 nm	530-18-X36
1200	250 nm	190-450 nm	530-25-X36
1200	330 nm	240-800 nm	530-22-X36
1200	500 nm	300-1000 nm	530-24-X36
1200	630 nm	400-1200 nm	530-27-X36
1200	750 nm	500-1200 nm	530-28-X36
1200	900 nm	600-1200 nm	530-50-X36
950	900 nm	700-1700 nm	530-60-X36
900	850 nm	700-1700 nm	530-66-X36
600	500 nm	300-1000 nm	530-29-X36
600	1000 nm	700-1750 nm	530 34 X36

Diffraction Grating Calculator

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.

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.

LabSpec	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™	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™	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.
SDK	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

Accessories

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.

C-Mount Adapter

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.

Part number	Description
MHRA-FW-UVVIS	MicroHR 5 Position Motorized Internal Filter Wheel with three 3 mm X 25.4 mm diameter filters [5500000368]: UV-S1 window J50311 320nm long pass J650500 550nm long pass J650501 Optional (to be ordered as separate line item): 830nm long pass J50451 850nm long pass J650514 1 micron long pass LPF-D1-0-3MM
MHRA-FW-NIR	MicroHR 5 Position Motorized Internal Filter Wheel with two 1 mm X 25.4 mm diameter filters [5500007269]: UV-S1 window J50336 1 micron long pass LPF-D1-0 Optional (to be ordered as separate line item): 1.9 micron long pass LPF-D1-9 3.5 micron long pass LPF-D3-5 6.0 micron long pass LPF-D6-0 11.7 micron long pass LPF-D11-7

Optical Choppers

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.

Spectroscopy Cameras

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.

Sample Compartment

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.

Specifications

Specifications
Focal length		140 mm
Entrance aperture ratio		f/3.88
Grating size		32 mm x 32 mm
Grating mount		Interchangeable dual grating turret
Image magnification at exit slit		1.1
Scanning range		0 nm to 1500 nm mechanical range
Drive speed (increasing wavelength)		500 nm/s
Focal plane		27 mm wide x 10 mm high
Spectral dispersion **		5.25 nm /mm
Spectral resolution **		0.25 nm
Wavelength position accuracy		± 0.25 nm
Wavelength repeatability (front exit)		± 0.04 nm
Minimum drive step size **		0.025 nm
Slits		Fixed or micrometer
Computer interface		USB 2.0
Dimensions	Length	7 in (178 mm)
	Width	8.1 in (206 mm) single exit port model 10.5 in (267 mm) dual exit port model
	Height	5.5 in (140 mm)
	Optical axis height	3.5 in (89 mm)
Nominal weight		10.0 lb (4.5 kg) single exit port model 11.0 lb (5.0 kg) dual exit port model

*All specifications with 1200 gr/mm grating, array with 26 micron pixels

** 400 nm

Specifications subject to change without notice.