We present a xenon arc source-based illumination system designed to achieve high spatial uniformity and efficient light collection across a wide spectral range. The proposed optical system comprised an ellipsoid reflector, diffuser, motorized iris, and collimation lens to optimize beam homogenization. Non-sequential ray-tracing simulations were performed to evaluate angular irradiation distributions of various diffusers and the overall beam profile uniformity. The system was experimentally implemented using a fused silica holographic diffuser optimized for high-power operation, with a motorized iris enabling precise control of light intensity. The resulting beam profile exhibited a well-defined flat-top shape, with a beam uniformity of approximately 95% evaluated according to the ISO 13694 standard. The developed illumination system demonstrated its ability to produce highly uniform illumination, suitable for various optical applications including spectroscopy, precision measurement, and optical imaging.

We present a rotating pair of mirrors based optical autocorrelator which is capable of providing a 0.1 m scanning range. The rotating mirror-pair technique enables rapid data update-rate, compactness, and simpler data post-processing compared to that of conventional linear motion-based optical autocorrelators. We optimized the geometrical design of the mirror-pair configuration by using off-the-shelf mirrors and conducted a simulation to calculate the expected capability of the scanning range. By exploiting a He-Ne laser as a light source, we validated the performance of the autocorrelator in its provision of a 100 mm scanning range and 0.2 Hz data update-rate, which was limited by the adopted commercial data sampling device, and not limited by the proposed principle. The developed autocorrelator is expected to be adopted for various applications that require sub-cm^-1 spectroscopic resolution.