Design
Design
Lens-to-lens alignment is achieved with an anti-backlash mounting
system and can be performed offline. The alignment of the focal spot
incident with the crystal is achieved through an XYZ stage mounted
directly onto the frame of the MD2M. Precision Mhar bearings provide
highly accurate translation and stability.The new microspectrophotometer design allows direct mounting on
beamlines equipped with a MiniDiffractometer and is thus compatible
with multiple beamlines at the ESRF. The compact design allows
integration with the MD2M and compatibility with other automated
beamline components such as the sample changer. A key feature of the
design is the ability to easily mount and dismount the instrument and
transfer it between MX-beamlines.
Components
The new mirror objective lenses have a diameter of 40mm and a focal distance of 35mm. A spot size with four fold demagnification of the input optical fiber is achieved. Quartz glass allows measurements in the UV/VIS range and a removable cassette allows filters to be inserted directly in the light path. Various UV/Vis lamp and laser light sources (ESRF Cryobench) are available for absorption and fluorescence measurements.
An Ocean Optics HR2000 detector with a 2048-element CCD-array
responsive from 200-1100nm is controlled by a dedicated laptop PC with
sampling speeds up to 40Hz. Various optical fibers are available
including a bifurcated assembly for face-on fluorescence measurements.