For the HR series, Ocean Optics offers pre-configured models for the most common spectroscopic measurements.
HR4 preconfigured models (CCD detector, 3648 px, int. time 3.8 ms - 10 s)
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Model
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Spectral range
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Input slit
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Spectral resolution*
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Diffraction grating
|
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HR-4UVV250
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~190 nm to >880 nm
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5-200μmselectable
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0.40 to 5.36 nm
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400 vr./mm, blaze 250 nm
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|
HR-4UVV300
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~200 nm to >650 nm
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selectable 5-200μm
|
0.26 to 3.48 nm
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600 vr./mm, blaze 300 nm
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|
HR-4UVV330
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~250 nm to >780 nm
|
selectable 5-200μm
|
0.36 to 4.82 nm
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500 verts/mm, blaze 330 nm
|
|
HR-4UV220
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~250 nm to >380 nm
|
selectable 5-200μm
|
0.08 to 1.07 nm
|
UV holographic, 1800 vr./mm
|
|
HR-4UV250
|
~190 nm to >410 nm
|
selectable 5-200μm
|
0.12 to 1.61 nm
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UV holographic, 1200 vr./mm
|
|
HR-4VIS400
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~350 nm to >800 nm
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selectable 5-200μm
|
0.26 to 3.48 nm
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600 verts/mm, 400 nm blaze
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|
HR-4VIS450
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~450 nm to >530 nm
|
selectable 5-200μm
|
0.06 to 0.80 nm
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holographic, 2400 vr./mm
|
|
HR-4VIS500
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~400 nm to >850 nm
|
selectable 5-200μm
|
0.26 to 3.48 nm
|
600 vr./mm, 500 nm blaze
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|
HR-4VIS550
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~450 nm to >650 nm
|
selectable 5-200μm
|
0.12 to 1.61 nm
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holographic, 1200 vr./mm
|
|
HR-4VIS700
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~530 nm to >640 nm
|
selectable 5-200μm
|
0.08 to 1.07 nm
|
holographic, 1800 vr./mm
|
|
HR-4VN400
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~350 nm to >1025 nm
|
selectable 5-200μm
|
0.40 to 5.36 nm
|
400 vr./mm, 400 nm blaze
|
|
HR-4N500
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~750 nm to >1.0 μm
|
selectable 5-200μm
|
0.17 to 2.28 nm
|
900 vr./mm, blaze 500 nm
|
|
HR-4N750
|
~750 nm to >920 nm
|
selectable 5-200μm
|
0.12 to 1.61 nm
|
1200 verts/mm, blaze 750 nm
|
|
HR-4N1000
|
~750 nm to >1150 nm
|
selectable 5-200μm
|
0.26 to 3.48 nm
|
600 verts/mm, blaze 1000 nm
|
|
HR-4XR300
|
~200 nm to >1.1 μm
|
selectable 5-200μm
|
0.54 to 7.23 nm
|
300 verts/mm, composite blaze
|
|
HR-4XR500
|
~190 nm to >1.1 μm
|
selectable 5-200μm
|
0.54 to 7.23 nm
|
300 vr./mm, 500 nm blaze
|
*depends on the selected input slit
Thanks to the modular approach, you can select the individual elements inside the spectrometer (diffraction grating, input slit, optical filters, collimating and focusing mirrors, optical lenses) to best optimize the system for your specific application.
1: Fiber optic connector
In addition to the standard SMA905 connector, a version with FC connector is also available.
2: Fixed input slot
The width of the input slit directly affects the spectral resolution of the spectrometer. A total of 6 slits of different sizes (5, 10, 25, 50, 100 and 200 µm) can be selected.
3: Absorption filter with top pass (longpass)
A high-pass filter is used to limit the bandwidth of light entering the spectrometer or to balance the colours. It is always installed permanently and for a specific input slit.
4: Collimating mirror
The light passing through the entrance slit (and possibly the absorption filter) is directed onto the diffraction grating using this mirror. A mirror with an aluminium reflective coating is used as standard. However, a special SAG+ mirror can also be used, which absorbs almost all UV radiation.
5: Diffraction grid
The chosen diffraction grating not only determines the spectral range, but also affects the spectral resolution of the instrument. During the manufacture of the spectrometer, the diffraction grating is first placed on a platform that allows it to be rotated to set the desired initial wavelength. The grating is then permanently fixed to prevent further mechanical displacement.
6: Focusing mirror
The task of the focusing mirror is to focus the generated spectrum (first diffraction orders) into the detector plane. A mirror with an aluminium reflective coating is used as standard. However, a special SAG+ mirror can also be used, which absorbs almost all UV radiation.
7: Detection collection lens
The sensitivity of the spectrometer can be noticeably increased by attaching an additional cylindrical lens to the detector, which increases the collection efficiency and reduces the level of unwanted stray light.
8: Detector
The correct choice of detector depends on the specific application. Three different detectors are available for the HR series.
9: OFLV filter to remove higher diffraction orders
The OFLV (Order-sorting Filter - Longpass Variable) is applied to the detector window using a patented sputtering technology. It is used to precisely block second and third diffraction orders and thus improve the accuracy of the spectrometer.
10: Detector window (optional upgrade for UV region)
It is recommended to replace the standard BK7 borosilicate glass detector window (which starts absorbing light around 340 nm) with a quartz glass window for measurements in the UV region of the spectrum.
