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Oriel 77250 Series 1/8 m Monochromator

Oriel 77250 Series 1/8 m Monochromator
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Oriel 77250 Series 1/8 m Monochromator - 1

S p e c t r o s c o p y I n s t r u m e n t s 1181 Email: sales@newport.com • Web: newport.com MONOCHROMATORS AND SPECTROGRAPHS SINGLE CHANNEL DETECTION SYSTEMS MINISPECTROMETERS BENCHTOP SPECTROMETERS AND CCD CAMERAS FT-IR SPECTROMETERS ACCESSORIES FOR SPECTROSCOPY INSTRUMENTS Oriel 77250 Series 1/8 m Monochromator 77250 1/8 m Monochromator with 6025 Hg(Ar) Spectral Calibration Lamp. For general-purpose laboratory work or academic applications, the Oriel 77250 1/8 m Monochromator is a smart and economical choice. This simple, manually operated 1/8 m instrument has good resolution, low stray light and is very versatile. A large family of slits and gratings give a wide range of bandpasses and broad spectral coverage. Optical Configuration The optical configuration of the 77250 is the reason why throughput is so high while stray light performance is unrivaled. Fig. 1 shows the Ebert-Fastie design with two inline slits and an out of plane grating. Having the slits opposite each other lets you mount the complete optical system on a bench or rail. Having the grating out of plane eliminates re-entrant spectra. Fig. 1 Optical configuration of 77250 1/8 m Monochromator. Manual Wavelength Drive and Readout The 77250 uses a hand crank to turn the grating. A 3-digit counter displays the wavelength directly in nanometers when using a 1200 l/mm grating. A calibrated wheel marked in 0.2 nm divisions lets you position and read the wavelength to 0.1 nm. For gratings with other line spacings, multiply the wavelength on the counter by the “Wavelength Counter Multiplier” listed in Table 1. The readout is factory set so the wavelength indicated is correct to within 1 nm through the full range of a 1200 l/mm grating. For greater accuracy, you can reset the readout within any restricted spectral region. The precision of this instrument is better than 0.2 nm, limited by backlash. Interchangeable Gratings Each grating is mounted in a protective frame. The frame has a tab for quick and easy insertion and removal without touching the surface of the grating. The following 30 x 30 mm replicated gratings are for the 77250 only; they cannot be used in any of our other Monochromators. • Low cost, compact size and high performance • Very efficient - high throughput and low stray light • Usable from 180 nm to 24 ìm with interchangeable gratings • Wide range of bandpasses with interchangeable slits GRATING OUTPUT PORT INPUT PORT

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Oriel 77250 Series 1/8 m Monochromator - 2

1182 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 Table 1 Grating Specifications for 77250 1/8 m Monochromator Line Density (I/mm) Blaze Wavelength Type Wavelength Counter Multiplier Reciprocal Dispersion (nm/mm)* Peak Efficiency (%) Primary Wavelength Region ** Instrument's Upper Wavelength Mechanical Limit (for specificed grating) Model 3600 405 nm Holographic...

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Oriel 77250 Series 1/8 m Monochromator - 3

S p e c t r o s c o p y I n s t r u m e n t s 1183 Email: sales@newport.com • Web: newport.com MONOCHROMATORS AND SPECTROGRAPHS SINGLE CHANNEL DETECTION SYSTEMS MINISPECTROMETERS BENCHTOP SPECTROMETERS AND CCD CAMERAS FT-IR SPECTROMETERS ACCESSORIES FOR SPECTROSCOPY INSTRUMENTS Fig. 3 Dimensional diagram of 77250 1/8 m Monochromator. Ordering Information Monochromator and Accessories To order a complete 77250 Monochromator, order a grating and (2) slit assemblies separately. Model Spectrometer System 77250 1/8 m Monochromator 74001 Micrometer Driven Slit Assembly 77269 Multiple Fixed Slit...

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