Agency for Defense Development

Korea Institute of Machinery & Materials

Ki-Ho Cho

Jae-Hyun Kim

Hak-Joo Lee

Shin Hur

Jung-yup Kim

Seung-Woo Han

Yeon-Chul Ha

Joon-Young Cho

Jae-Hwan Lee

Young-Il Kang

Jae-Ihn Kim

A high-order harmonic wave generation apparatus using a diode-pumped solid state laser includes a pump head for generating a fundamental wave, Porro prisms disposed on the left and right sides of the pump head, nonlinear crystals for sequentially generating a second-order harmonic wave, a fourth-order harmonic wave, and a fifth-order harmonic wave from the fundamental wave, and a final emission unit for reflecting and transmitting any one of the second-order harmonic wave, the fourth-order harmonic wave, and the fifth-order harmonic wave and for emitting the harmonic wave without changing the optical path. Accordingly, the apparatus is insensitive to changes in the external environment through a resonator having a structure comprising Porro prisms, and enables the final emission unit to selectively output the fourth-order harmonic wave or the fifth-order harmonic wave.

High-order harmonic wave generation apparatus capable of selecting wavelength

Disclosed herein is an apparatus for measuring adhesive and frictional properties of a polymer hemisphere relative to a contact plate provided in the apparatus. The apparatus comprise a body having a movable table installed to move along an X-axis and Y-axis and a vertical column positioned at a rear side of the movable table, a sample mount provided on the movable table and having a mirror to reflect surface images of a horizontal contact plate, a head assembly located at a front side of the column and having a polymer hemisphere used to press a surface of the contact plate to implement an adhesive force test, a camera device located at a front side of the mirror to capture the surface images of the contact plate during the adhesive force test, and a control device for analyzing various data inputted thereto during the adhesive force test.

Apparatus for measuring adhesive and frictional properties of polymer

Growing community of inventors

Daejeon, South Korea

Ki-Ho Cho