iHR550 Imaging Spectrometer0 pages

Imaging Spectrometer

OSD-IS-01
Simply the Best
Imaging Spectrometer
with No Compromise

The iHR550 imaging spectrometer from HORIBA
Scientific is simply the most versatile spectrometer
on the market with no compromise among imaging,
spectroscopy, and adaptability. The iHR550 utilizes a
unique patented asymmetric design, which provides
superior image quality and minimizes unwanted optical
aberrations common to symmetric and crossed-Czerny
Turner designs. For unrestricted flexibility, the iHR550
allows the user to take full advantage of the instrument
by having two entrance and two exit ports for enhanced
measurement capabilities.
The iHR550 is the most suitable imaging
spectrometer solution for:
•t Multi-track spectroscopy with tens of fibers
imaged at once
•t Direct coupling for microscopy and 2D imaging
•t Hyperspectral imaging for Raman and
luminescence applications
•t UV-Vis, near-IR and mid-IR spectroscopy with
multiple array or single-channel detectors

Virtually No Astigmatism
When spatial resolution is needed, optical aberrations
and—more precisely—astigmatism limits the imaging
capabilities of the spectrometer. In a multi-track
spectroscopy setup, where high spatial resolution is
needed, astigmatism leads to a "bow-tie" effect, in which
the image of each fiber blurs in the vertical direction
towards the edge of the CCD. The iHR550 spectrometer
minimizes astigmatism and delivers a sharp image of each
fiber across the entire focal plane, as shown in Figure 1.
Negligible Crosstalk
To assess the degree of crosstalk between fibers, it is
necessary to perform a horizontal bin of the full image.
In a poorly designed spectrometer with a high degree of
astigmatism, the signal between fibers begins to overlap,
preventing clear separation between the fibers. The design
of the iHR550 minimizes crosstalk between channels
and improves contrast ratio. Figure 2 (next page) shows
that the iHR550 image quality provides distinct peak
separation.

Figure 1. Image of a broadband quartz tungsten-halogen spectrum recorded with nineteen 200 μm fibers using the 1× imaging adapter with
an iHR550 spectrometer, 1200 gr/mm grating blazed at 500 nm, and 1024×256 open-electrode CCD.