MCS260B
CORNERSTONE 260B MONOCHROMATORS
9
2 INTRODUCTION
The Oriel Cornerstone 260B is a high performance, economical and user-friendly monochromator
– an
ideal instrument for research and OEM applications.
Each of these instruments includes up to four diffraction gratings, filter wheel control circuitry, and an
integrated electronic shutter. Communication may be established using USB, RS-232, or an optional
hand controller designed specifically for use with the Cornerstone family of monochromators.
The Cornerstone 260B includes a utility program designed to run on a computer using the Microsoft
Windows operating system. The simple, intuitive interface means that users can get up and running
within minutes of opening the box. Also included is a low-level terminal command interface to send direct
functional commands via RS-232. An optional hand controller may be used for quick access to all
common commands and queries, without requiring a computer. This is especially beneficial in
universities and secure facilities.
A wide selection of preconfigured grating models are available for the Cornerstone 260B, as well as
custom configure order options. Throughput and resolution can be adjusted by selecting the appropriate
slit size. Fixed slits are available for high accuracy and repeatability, and micrometer adjustable slits may
be used for maximum flexibility. Automatic bandpass control is available with the use of motorized slits.
2.1 OPTICAL CONFIGURATION
The optical design of the Cornerstone 260B is based upon an asymmetrical in-plane version of a
Czerny-Turner monochromator. The optical configuration is designed to ensure high resolution
and maximum throughput. This F/3.9 monochromator is optimized to provide excellent stray light
rejection while minimizing aberrations. A high precision motor is used to select the desired
wavelength and switch between diffraction gratings quickly, without sacrificing performance.
With the Cornerstone 260B monochromator, there is a choice between a dual (2) or quad (4)
grating assembly. Select which assembly works best for your application based on the spectral
range you desire to cover.
The Dual Grating Mount
Like its predecessor models, the dual grating mount allows up to two (2) diffraction gratings to be
installed back-to-back. Both gratings are pre-aligned on this mount which is then installed on the
precision rotation stage. The gratings rotate 360
0
on the stage (Figure 2).
The Quadruple Grating Turret
The quadruple grating turret allows up to four (4) diffraction gratings to be installed on a four-sided
assembly. All gratings are pre-aligned on the turret which is then installed on the precision rotation
stage. The turret will flip each grating independently as the stage rotates (Figure 1).
