1196 MONOCHROMATORS AND SPECTROGRAPHS BENCHTOP SPECTROMETERS MINISPECTROMETERS SINGLE CHANNEL DETECTION SYSTEMS AND CCD CAMERAS FT-IR SPECTROMETERS Phone: 1-800-222-6440 • Fax: 1-949-253-1680 S p e c t r o s c o p y I n s t r u m e n t s ACCESSORIES FOR SPECTROSCOPY INSTRUMENTS Oriel MS257™ 1/4 m Monochromator and Imaging Spectrograph MS257 14 Monochromator/Spectrograph with 77529 F/# Matcher mounted to input slit assembly The MS257™ is a completely automated, efficient 1/4 m instrument, with enough versatility to satisfy most spectroscopy applications. It is an F/3.9 instrument with a focal length of 257.4 mm, usable as a monochromator or true flat field imaging spectrograph. Stray light is negligible, and there is no re-entrant spectra. The MS257 has 2 output ports, 1 input port (with optional accessory can support 2 inputs), and supports 4 gratings. High Efficiency The low F/number of 3.9 (a numerical aperture of 0.128) combined with slits of up to 5 mm wide x 20 mm high, gives an efficient throughput. The dispersion is similar to that of our other 1/4 m monochromators, and twice that of our 1/8 m systems. Both the mirrors and gratings in MS257 further enhance throughput. Each of the optics is coated with aluminum and a magnesium fluoride overcoat which improves their UV efficiency. (Contact a Sales Engineer for gold coated optics.) The 77708 Multiple Grating Turret allows you to choose up to four gratings to cover your wavelength range. WIDE OPTICAL SEPARATION 77708 MULTIPLE GRATING TURRET 77737 FILTER WHEEL AXIAL PORT TWO DETECTOR PORTS LATERAL PORT 77716 MOTOR DRIVEN FLIP MOTOR 77713 AUXILIARY INPUT PORT 77755 SHUTTER HIGH SPEED MOTOR DRIVE RS-232, IEEE-488, AND TTL COMMUNICATIONS 77710 IEEE INTERFACE FINE FOCUS ADJUSTMENT 77712 MOTORIZED SLIT CONTROL BOARD INTEGRAL CPU 77722 MOTOR DRIVEN SLIT ASSEMBLY Fig. 1 MS257 Monochromator and Spectrograph with selected optional accessories Optical Configuration MS257 is designed around an asymmetric in-plane Czerny- Turner configuration. The input F/# is 3.9, and the input and exit focal lengths are unequal, 220.0 and 257.4 mm respectively. The design was carefully optimized to: • Minimize coma throughout the working wavelength range • Eliminate re-diffracted light from either of the two main mirrors • Eliminate re-diffracted light from reflections off the window or surface of a focal plane detector • Provide the best flat focal field for the entire working wavelength range • Provide the best imaging using corrected optics (toroids) over the entire working wavelength range Input and Output Ports MS257 has one entrance port and two output ports (see Fig. 2). Normally, the axial output port is used since this does not require a turning mirror and therefore prevents additional light losses at the extra reflecting surface. However, the in-line configuration of the lateral port offers greater detector mounting flexibility. To use just the lateral output port you’ll need the 77718 Side Exit Mirror. This mirror is prealigned and can be inserted in the field. If you intend to use both output ports, and regularly switch between them, you should use the 77716 Motorized Flip Mirror. You can pre-program MS257 to automatically change the output port at a particular wavelength. The mirror drive has excellent positioning reproducibility of better than 0.05 nm (with a 1200 l/mm grating). This precision is essential to obtaining reproducible scans when changing detectors in mid scan. An Auxiliary Input Port, or Motorized Beam Steerer (model 77713 110V or 77765 220V), is available to convert MS257 to a four port monochromator or spectrograph. This is an external accessory and has a motor driven mirror which is similar to the output mirror drive of the 77716. It enables two sources to be alternately switched into the input port, for example a deuterium lamp and quartz halogen lamp (See Fig. 3). The mirror can be controlled through the MS257 command • 1/4 m monochromator and imaging spectrograph in one instrument • 4 grating turret with automatic grating switching • Two flat field output ports with automatic port switching • Negligible stray light and no re-entrant spectra • RS-232 and optional IEEE-488 interfaces

S p e c t r o s c o p y I n s t r u m e n t s 1197 Email: [email protected] • Web: newport.com MONOCHROMATORS AND SPECTROGRAPHS SINGLE CHANNEL DETECTION SYSTEMS MINISPECTROMETERS BENCHTOP SPECTROMETERS AND CCD CAMERAS FT-IR SPECTROMETERS ACCESSORIES FOR SPECTROSCOPY INSTRUMENTS language; the Hand Controller does not control the 77713/77765. The optical path length of this Beam Steerer is 6.5 inches (165 mm); see page 1316 for complete details. ENTRANCE LATERAL EXIT AXIAL EXIT OPTIONAL OUTPUT MIRROR Fig. 2 Lateral and axial ports of MS257 LAMP HOUSING WITH QTH SOURCE LAMP HOUSING WITH D SOURCE...

1198 MONOCHROMATORS AND SPECTROGRAPHS BENCHTOP SPECTROMETERS MINISPECTROMETERS SINGLE CHANNEL DETECTION SYSTEMS AND CCD CAMERAS FT-IR SPECTROMETERS Phone: 1-800-222-6440 • Fax: 1-949-253-1680 S p e c t r o s c o p y I n s t r u m e n t s ACCESSORIES FOR SPECTROSCOPY INSTRUMENTS order to expose the CCD detector. The 77755 is controlled through the MS257 command language, the 77709 Hand Controller, directly via an externally applied TTL signal, or through the optional TRACQ™ software. Specifications for 77755 Light Leakage < 0,001 % Minimum Exposure Time 0.2 s Maximum Frequency 0.5 Hz Transition...

S p e c t r o s c o p y I n s t r u m e n t s 1199 Email: [email protected] • Web: newport.com MONOCHROMATORS AND SPECTROGRAPHS SINGLE CHANNEL DETECTION SYSTEMS MINISPECTROMETERS BENCHTOP SPECTROMETERS AND CCD CAMERAS FT-IR SPECTROMETERS ACCESSORIES FOR SPECTROSCOPY INSTRUMENTS Table 1 Grating Specifications (The array bandpass assumes a 25 mm wide spectrographic field.) Model Line Density (I/mm) Blaze Wavelength Type Peak Efficiency (%) Reciprocal Dispersion (nm/mm)* Multichannel Array Bandpass (nm)** Primary Wavelength Region (nm) *** Instrument's Upper Wavelength Mechanical Limit (For specified...