Ammonium dihydrogen phosphate (NH4H2PO4, ADP) crystals were grown in a defined
direction (θ= 90°, Φ= 45°) from an aqueous solution via the temperature reduction “point …

To further improve the quality of the cuboid DKDP crystal, the effect of thermal annealing at
160° C were evaluated. After thermal annealing, the symmetry of the HRXRD of the X-cut …

Surface defect detection is the key to assessing the quality of optical surfaces. Traditional
geometric optics cannot adequately explain the distribution of defects on surfaces. Herein, a …

In this paper, an automated microscopic instrument based on this technique is developed
and used for the measurement and analysis of weak absorption properties of optical …

Progress report is made on the development of a multimodal inspection technique for
surface/sub-surface defect characterizations of large-aperture optics. A high-speed laser …

In this paper a commercial photothermal instrument is used to study the radiation effects on
weakly absorptive optical thin film coatings induced by high repetitive laser pulses. Through …

Local alterations in UV absorption have been used to investigate subsurface damage in
transparent optical materials. As a detection method, a collinear pump-probe arrangement …

It is very challenging to characterize surface/sub-surface defects for large-aperture optics.
The first challenge is the conflict between high resolution and large field of view, namely …

Potassium dihydrogen phosphate (KDP) is commonly used for frequency conversion and
optical switching applications in many high-power laser systems. Such applications require …

In this paper, the concept of a mesoscopic method with high-speed and high-sensitivity is
proposed for characterization of surface defects for large optics. The technology is a …