title: Midwave infrared optical zooming design and kinoform degrading evaluation methods.
abstract: In this study, an optical zooming design method is constructed by ray tracing. The loci of each thin lens is determined utilizing algebraic relationships. A mechanical compensation structure is adapted to stabilize the position of the focal plane. The Gaussian design result is applied for the midwave infrared spectrum, and aberrations can be reduced by controlling the geometric parameters of the thick lens. One hybrid achromatic singlet is introduced utilizing a diffraction optical element. The kinoform surface relief is calculated being the same as its microfabrication process. The effects of the discontinuous zonal profile and the thermal degradation are evaluated.
authors.affiliation: Electro-Optics Section, Materials & Electro-Optics Research Division, Chung-Shan Institute of Science & Technology, Lung-Tan 325, Taiwan, R.O.C. kuocw00@yahoo.com.tw
authors.forename: Chih-Wei
authors.initials: CW
authors.lastname: Kuo
authors.forename: Jr-Ming
authors.initials: JM
authors.lastname: Miao
authors.forename: Chang-Hsien
authors.initials: CH
authors.lastname: Tai