The Gemini 180 is a fully automated, double additive grating scanning monochromator. Inside the monochromator housing are two 180 mm focal length monochromators that share a common intermediate slit. The incorporation of toroidal optics provides optimum throughput and spectral resolution. It is ideal for applications that require low stray light including transmission, absorbance, reflectance, and fluorescence. The Gemini 180 also functions as a high power, high purity light source for fluorescence, detector characterization, and microscope illumination when coupled with a xenon lamp. These monochromators also benefit from the highest quality of gratings, also designed and manufactured by HORIBA.
The GEMINI-180 has three motorized slits: Entrance, Intermediate and Exit. In the standard version, each slit may be set between 0–7 mm. A custom version may be ordered (designated GEMINI-180-2) with a set of three slits which may be set between 0–2 mm. The slits are internal to the monochromator. 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 Gemini-series spectrometers to obtain optimum results for a variety of applications. To attach the accessories to the Gemini, use the two tapped holes on the body of the height limiter on the outside of the monochromator (shown below). These holes are also useful for connecting the Gemini with your experiments and equipment. When connecting with the Gemini, it is important to know the distance from the mounting face of the slit’s body to the slits.
Note that some custom accessories require removal of the height-limiter assembly in order to be attached to the FHR chassis. To remove the height-limiter assembly, remove the four screws holding the assembly onto the chassis.
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 Gemini series of spectrometers take full advantage of the highest quality of gratings that HORIBA designs and manufactures.
There is a wide selection of gratings to choose from depending on optical requirements. Gratings are 50 x 50 mm for the M Series. 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. |
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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. |
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.
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.
Below is a comprehensive list of available gratings for the M series of spectrometers. Other gratings are also available upon request.
Groove Density L/mm | Blaze Wavelength | Recommended Spectral Range | Blaze Angle | Part Numbers |
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300 nm | 150-600 nm | 17°27' | 510 01 330 | |
500 nm | 250-850 nm | 26°45' | 510-02-330 | |
630 nm | 350-850 nm | 34°32' | 510 03 330 | |
250 nm | 150-500 nm | 8°38' | 510-04-330 | |
330 nm | 200-700 nm | 11°25' | 510-05-330 | |
400 nm | 200-800 nm | 13°53' | 510-06-330 | |
500 nm | 250-950 nm | 17°27' | 510-07-330 | |
630 nm | 350-1200 nm | 22°12' | 510 08 330 | |
750 nm | 400-1200 nm | 26°45' | 510-09-330 | |
1µm | 500-1200 nm | 36°52' | 510-10-330 | |
350 nm | 200-700 nm | 9°00' | 510 91 330 | |
550 nm | 250-1100 nm | 14°30' | 510-93-330 | |
1.5 µm | 600-1700 nm | 42°27' | 510-97-330 | |
300 nm | 200-600 nm | 5°10' | 510-11-330 | |
400 nm | 250-800 nm | 6°54' | 510-12-330 | |
500 nm | 250-1000 nm | 8°38' | 510-13-330 | |
750 nm | 400-1500 nm | 13°00' | 510-14-330 | |
1µm | 500-1700 nm | 17°27' | 510-15-330 | |
1.5 µm | 750-2400 nm | 26°45' | 510-16-330 | |
2 µm | 1000-2400 nm | 36°52' | 510-17-330 | |
300 | 250 nm | 150-500 nm | 2°09' | 510-50-330 |
500 nm | 300-950 nm | 4°18' | 510-18-330 | |
600 nm | 350-1300 nm | 5°10' | 510-19-330 | |
1 µm | 700-2000 nm | 8°38' | 510-20-330 | |
2 µm | 1100-4500 nm | 17°27' | 510-21-330 | |
3 µm | 1700-5000 nm | 26°45' | 510-22-330 | |
4 µm | 2000-5000 nm | 36°52' | 510-23-330 | |
500 nm | 250-950 nm | 2°09' | 510-49-330 | |
1-2 µm | 800-2300 nm | 5°10' | 510-24-330 | |
2 µm | 1200-4000 nm | 8°38' | 510-25-330 | |
4 µm | 2.2 - 9 um | 17°27' | 510-26-330 | |
5 µm | 3.5 - 10 um | 22°01' | 510-27-330 | |
150 | 6 µm | 4 - 10 um | 26°45' | 510 28 330 |
150 | 8 µm | 5 - 10 um | 36°52' | 510 29 330 |
120 | 2-5 µm | 1.7 - 4.5 um | 8°39' | 510-30-330 |
5 µm | 3 - 10 um | 17°27' | 510-31-330 | |
7-5 µm | 4.5 - 12 um | 26°45' | 510-32-330 | |
450 nm | 250-950 nm | 1°17' | 510-48-330 | |
3 µm | 1.7 - 6 um | 8°38' | 510 33 330 | |
6 µm | 3 - 13 um | 17°27' | 510 34 330 | |
9 µm | 5 - 14.5 um | 26°45' | 510 35 330 | |
75 | 4 µm | 2 - 8 um | 8°38' | 510-36-330 |
8 µm | 5.5 - 17 um | 17°27' | 510 37 330 | |
12 µm | 8 - 19 um | 26°45' | 510-38-330 | |
10 µm | 7.5 - 13 um | 17°27' | 510-39-330 | |
15 µm | 9 - 24 um | 26°45' | 510-40-330 | |
50 | 6 µm | 3 - 12 um | 8°38' | 510-41-330 |
50 | 12 µm | 8 - 22 um | 17°27' | 510-42-330 |
50 | 18 µm | 11 - 28 um | 26°45' | 510-43-330 |
50 | 24 µm | 15 - 30 um | 36°52' | 510-44-330 |
40 | 22-5 µm | 14 - 30 um | 26°45' | 510 45 330 |
30 | 30 µm | N/A | 26°45' | 510 46 330 |
20 | 45 µm | N/A | 26°45' | 510 47 330 |
Groove Density L/mm | Recommended Spectral Range | Part Numbers |
|---|---|---|
150-400 nm | 520-07-330 | |
3000 | 250-450 nm | 520-09-330 |
300-600 nm | 520-12-330 | |
170-500 nm | 520-13-330 | |
100-300 nm | 520 14 330 | |
450-650 nm | 520 15 330 | |
190-650 nm | 520 16 330 | |
150-450 nm | 520 17 330 | |
2000 | 100-300 nm | 520 18 330 |
450-850 nm | 520 -19 -330 | |
190-700 nm | 520 -20 -330 | |
150-450 nm | 520 -21 -330 | |
1800 | 100-300 nm | 520 22 330 |
400-1200 nm | 520 -24 -330 | |
190-700 nm | 520 -25 -330 | |
150-450 nm | 520 -26 -330 | |
400-1300 nm | 520 -29 -330 | |
150-450 nm | 520 30 330 | |
250-800 nm | 520 -32 -330 | |
400-1200 nm | 520 33 330 |
Groove Density L/mm | Blaze Wavelength | Recommended Spectral Range | Part Number |
|---|---|---|---|
250 nm | 190-600 nm | 530-13-330 | |
330 nm | 200-600 nm | 530-11-330 | |
400 nm | 300-600 nm | 530-15-330 | |
1800 | 500 nm | 450-850 nm | 530 19 330 |
250 nm | 180-650 nm | 530-20-330 | |
400 nm | 250-850 nm | 530-18-330 | |
250 nm | 190-450 nm | 530-25-330 | |
330 nm | 240-800 nm | 530-22-330 | |
500 nm | 300-1000 nm | 530-24-330 | |
630 nm | 400-1200 nm | 530-27-330 | |
750 nm | 500-1200 nm | 530-28-330 | |
900 nm | 600-1200 nm | 530-50-330 | |
900 nm | 700-1700 nm | 530-60-330 | |
850 nm | 700-1700 nm | 530-66-330 | |
500 nm | 300-1000 nm | 530-29-330 | |
1000 nm | 700-1750 nm | 530 34 330 |
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. | |
SynerJYâ„¢ | SynerJYâ„¢ 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 |
The Gemini 180 monochromator 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 Gemini 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). | ||
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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). | ||
| 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 Optical Accessoriesclick here. |
| Single Channel Detectors
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| Broad Band Light Sources
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| 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. |
Optical layout | Double Czerny-Turner with toroidal optics providing maximum throughput |
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Focal length | 180 mm |
Aperture | f/3.8 |
Reciprocal linear dispersion | 2.1 nm/mm using 1200 gr/mm grating |
Resolution | 0.15 nm at 546.1 nm with 10 μm slits |
Stray light | 10-9(measured at 1 nm from 514 nm laser with HORIBA Scientific holographic gratings) |
Slits | High-precision motorized, 0 to 2 mm width (2.25 micron step size) or 0 to 7 mm width (6.25 micron step size), |
Bandpass | Continuously adjustable from 0 to 15 nm (1200 gr/mm grating) |
Wavelength scanning | Direct digital stepper-motor drive (worm drive) |
Scan Speed | 160 nm/s |
Spectral range | 150 to 1500 nm (1200 gr/mm grating) |
Accuracy | ±0.05 nm |
Repeatability | ±0.1 nm |
Drive step-size | 0.06 nm (nominal) |
On-board electronics | Every aspect of the Gemini-180 is automated including the spectrometer wavelength-drive, entrance, exit, and intermediate slits, and internal shutters. |
Computer control | USB 2.0 built in |
Shutter | Optional, inside entrance slit |
Dimensions (not including adjustable legs) | 18.2" (W) × 16.4" (L) × 7.5" (H) |
All specifications given for 1200 g/mm grating and are subject to change without notice.
Do you have any questions or requests? Use this form to contact our specialists.
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, 
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, 