We develop a proto-model of an off-axis reflective telescope for infrared wide-field observations based on the design of Schwarzschild-Chang type telescope. With only two mirrors, this design achieves an entrance pupil diameter of 50 mm and an effective focal length of 100 mm. We can apply this design to a mid-infrared telescope with a field of view of 8 ̊ X 8 ̊. In spite of the substantial advantages of off-axis telescopes in the infrared compared to refractive or on-axis reflective telescopes, it is known to be difficult to align the mirrors in off-axis systems because of their asymmetric structures. Off-axis mirrors of our telescope are manufactured at the Korea Basic Science Institute (KBSI). We analyze the fabricated mirror surfaces by fitting polynomial functions to the measured data. We accomplish alignment of this two-mirror off-axis system using a ray tracing method. A simple imaging test is performed to compare a pinhole image with a simulated prediction.

• SangHyuk Kim(Korea Basic Science Institute/School of Space Research, Kyung Hee University)
• SooJong Pak(School of Space Research, Kyung Hee University)
• SeungHyuk Chang(Samsung Electronics)
• GeonHee Kim(Korea Basic Science Institute)
• SunChoel Yang(Korea Basic Science Institute)
• MyungSang Kim(Korea Basic Science Institute)
• SungHo Lee(Korea Astronomy and Space Science Institute)
• HanShin Lee(McDonald Observatory, Univ. of Texas at Austin)