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UT3 - Ultimate Triple Spectrometer for Raman Spectroscopy

McPherson's Ultimate Triple 3 (UT3) Spectrometer delivers better imaging performance and stray light rejection for Raman spectroscopy at wavelengths from 190 to 800 nm. The UT3 delivers excellent Raleigh rejection of about 1 or 2 cm-1 in the Visible. Performance is attained by using small entrance images, high quality off-axis parabolic optics, and a unique relay / spatial filter stage located in the middle of the subtractive pre-monochromator. Reflective optics with optimized coatings provide response in the ultraviolet. For Raman work across a wide wavelength range, optimized for the UV and for superior rejection, the Ultimate Triple 3 Spectrometer is a stand out.

McPherson also builds more Raman spectrometers with emphasis in ultraviolet.

McPherson's UT3 has the following features: The entire optical train uses reflective optics to enable the wide wavelength range without refocusing. The f/1 collector is a high quality reflective parabolic system designed by Dr. M. Ruebhausen (University of Hamburg) and built by McPherson. It uses master Lambda/8 parabolic reflectors for 6X magnification, sample to slit. The high performance subtractive double pre-monochromator is used for band selection and edge formation. The pre-spectrometer utilizes master Lambda/8 off-axis parabolic optics for idyllic point imaging. The slits translate to fine tune the spatial location of images and optimize the rejection. The unique subtractive stage also uses a relay / spatial filter stage, further sharpening the rejection edge. The high resolution and aperture matched spectrograph stage, with elliptical imaging optics, optimizes flux conservation and imaging across a larger focal plane. A simple single stage bypass allows use of simple filters with the spectrograph for feasibility or preliminary works. This is the third generation of successive improvements to an original concept by Dr. Miles V. Klein (University of Illinois - Urbana).

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