AVS 57th International Symposium & Exhibition
    Thin Film Tuesday Sessions
       Session TF-TuP

Paper TF-TuP15
On the Optics of Thin Films Applied in Aerospace Telescope

Tuesday, October 19, 2010, 6:00 pm, Room Southwest Exhibit Hall

Session: Thin Film Poster Session I
Presenter: C.N. Hsiao, National Applied Research Laboratories, Taiwan
Authors: C.N. Hsiao, National Applied Research Laboratories, Taiwan
H.P. Chen, National Applied Research Laboratories, Taiwan
P.K. Chiu, National Applied Research Laboratories, Taiwan
Y.W. Lin, National Applied Research Laboratories, Taiwan
W.H. Cho, National Applied Research Laboratories, Taiwan
F.Z. Chen, National Applied Research Laboratories, Taiwan
D.P. Tsai, National Taiwan University
Correspondent: Click to Email
Optical thin films designed for space grade multi-spectral assembly in CMOS sensor and reflective Ag mirror were deposited on radiation-resistant glass by ion-beam-assisted deposition for a Cassegrain-type aerospace telescope . The patterned multi-spectral assembly contained the blue, green, red, near infrared, and panchromatic multi layers high/low alternated dielectric band-pass filters arrays in a single chip which was fabricated by photolithography process. The corresponding properties of the films were investigated by in-situ optical monitoring, ellipsometry, spectrometry, and high-resolution transmission electron microscopy. It was found that the average transmittances are above 88% for the multi-spectral assembly, with a rejection transmittance below 1% in the spectral range of 350~1100 nm. The average reflectance of the Ag mirror (with a protective interference coating) is boosted above 99% in visible spectrum. The polarization sensitivity of the optical payload is below 5 %. Furthermore, to estimate the optical stability of optical thin films for aerospace applications, a space environment that the satellite orbiting above the earth surface at an altitude near 900 kilometers were simulated by Co60 gamma (g) radiation test (total dose effects) and thermal vacuum test (pressure below 10-7 Torr with thermal cycles).The optical stability of the films with the environmental test will be discussed.