The single crystal MicroSpectrophotometer system is mounted such that the optical focal point is coincident with the x-ray beam at x26c. This  enables correlated optical absorption spectroscopic data and diffraction data from the same crystal, without removing the sample from the diffractometer. A 25 micron region of the crystal is  probed and optical spectra are typically collected in approximately one second.  Redox active proteins and/or crystals containing optical chromophores are ideal candidates for this methodology.
Optical absortpion spectra can be collected between ~350-850 nm with samples held at 100K.

Crystals are mounted on a Crystal Logic diffractometer consisting of a mini-kappa goniometer (relocated from X25) and an ADSC Quantum 4 Detector.