搭配自由曲面之寬頻帶反射型頭戴顯示器

Abstract

本論文中，我們研究一頭戴顯示器，其工作範圍涵蓋可見光波段與紅外 光波段。由於可見光與紅外光的波長相差甚大，產生了相當大的色差問題， 為了克服此色差問題， 我們將整個系統都使用了反射鏡。除此之外， 我們 使用了自由曲面來克服球差與慧差等像差， 降低系統鏡片數。這些自由曲 面鏡的功能是將微顯示器所產生的內容， 放大後投射至人眼。當使用0.61 吋的微顯示器時，將產生對角線方向的視角30 度，當出瞳大小為8 釐米時， 產生出的f/#為3.75。本系統的適眼距為15 釐米。

It is a challenge to design a head-mounted display (HMD) that covers both visible and infrared rays. Since the HMD system covers such a broad spectral band, large color aberrations will be induced. In order to eliminate these large aberrations, a mirror system is adopted that will create a no color aberration system. We also use two freeform mirrors (FFMs) to reduce residual aberrations such as spherical aberrations and coma. The FFMs serve as the near-eye viewing optics that magnifies the image which is displayed through a microdisplay. Based on a 0.61 in. microdisplay, the HMD system demonstrates a diagonal field of view (FOV) of 30 degree and an f/# of 3.75, with an exit pupil diameter of 8 mm and eye clearance of 15mm.