Group: Newport
Catalog excerpts
S p e c t r o s c o p y I n s t r u m e n t s 1309 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 Our Fiber Optic F/Number ( F/#) Matcher increases the F/# of the beam from a fiber optic by a factor of 2. Use it to match fused silica fibers, which have an F/# of ~2, to the input of Oriel Monochromators and Spectrographs, most of which have an F/# of ~4. This gives you two significant advantages: • Decreases stray light inside your instrument • Increases throughput The F/# Matcher uses reflective imaging optics and is usable over the wavelength range of 190 nm to 24 ìm. The efficiency is over 75%. The Problem The output of most fiber optics, characterized by the fiber F/#, is too divergent for efficient acceptance by a monochromator or spectrograph. This leads to potentially significant loss in efficiency and increased stray light due to the overspill of the beam inside the instrument. The Solution Because of the various fiber types and because any conversion of the fiber output beam to match the monochromator cannot beat the fundamental concept of optical extent, there is no universal solution to the problem. However, depending on resolution requirements, the 77529 F/# Matcher offers, in many cases, efficiency improvements and reduction in stray light. Fig. 1 illustrates the problem and the solution. Note, when you use the F/# matcher, the fiber image is magnified by a factor of 2. STRAY LIGHT STRAY LIGHT INPUT MIRROR ACCEPTANCE ANGLE OF MONOCHROMATOR/SPECTROGRAPH TO COLLIMATING MIRROR AND GRATING FIXED SLIT ASSEMBLY SLIT WITHOUT F/# MATCHER FIBER WITH QUICK CONNECT FERRULE FIBER OPTIC ADAPTER INPUT MIRROR TO COLLIMATING MIRROR AND GRATING 77529 F/# MATCHER FIXED SLIT ASSEMBLY SLIT WITH F/# MATCHER FIBER WITH QUICK CONNECT FERRULE Fig. 1 The 77529 F/# Matcher reduces stray light by matching the output angle of a fiber to the input angle of our monochromator. Mounting and Positioning The 77529 has precise X,Y and Z focus adjustment for optimal alignment of the fiber image with the monochromator slit. It has a 1.5 Inch Series female Quick Connect flange and an adapter to hold any Oriel Fiber with standard or Quick Connect 11 mm ferrule. The 77529 also has a 1/4-20 tapped hole for rod mounting. Even with flange mounting, you should rod mount the F/# Matcher for added stability. A 4.4 inch (112.5 mm) clearance between the F/# Matcher’s housing and its output focal point allows enough room to place a filter wheel (page 266). The fiber image is focused through the filters, into the monochromator. We supply an adjustable extension tube with the F/# Matcher, adjustable from 65 to 112.5 mm. • Matches the F/# of fused silica fiber optics to that of Oriel Monochromators and Spectrographs • Maintains good image quality in spectral and spatial directions • Decreases stray light in spectral instruments • Increases throughput Oriel Imaging F/# Matcher 77529 F/# Matcher, with Multi-Track Fiber, mounted to MS257™ Monochromator.
Open the catalog to page 11310 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 MONOCHROMATORS AND SPECTROGRAPHS BENCHTOP SPECTROMETERS MINISPECTROMETERS SINGLE CHANNEL DETECTION SYSTEMS AND CCD CAMERAS ACCESSORIES FOR FT-IR SPECTROMETERS SPECTROSCOPY INSTRUMENTS 200 ìm 400 ìm IMAGE AT THE OUTPUT OF THE 77529 F/# MATCHER OUTPUT OF FIVE TRACK MULTI-TRACK FIBER; IMAGE AT THE INPUT OF THE F/# MATCHER 77529 F/# MATCHER IMAGE AT THE OUTPUT OF A STANDARD 2 LENS F/# MATCHER STANDARD 2 LENS F/# MATCHER Fig. 2 Image of a 5-Track Fiber Bundle at the output of the Oriel 77529 F/#...
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