@techreport{oai:ipsj.ixsq.nii.ac.jp:00234453,
 author = {谷口, 和優 and 野倉, 大輝 and 木島, 竜吾 and Kazumasa, Taniguchi and Daiki, Nokura and Ryugo, Kijima},
 issue = {15},
 month = {May},
 note = {古典的なビデオシースルー HMD ではユーザーの視点とカメラの位置にずれがある．これを解消すべく，平行な要素だけを用いたパンケーキウィンドウ光学系のプロトタイプを製作し，設計意図通りに引いた視点からの撮像を確認した．この種の光学系は迷光とそれが作る複像が問題となるのだが，そのうち 1/4 波長板の表面反射による迷光の割合が一番大きかった．この迷光を削除しコントラストを計測したところ，周波数帯域は 15[cpd] と十分であったが，コントラストは低周波領域から 0.6 と低かった．, In typical video see-through head-mounted displays (HMDs), there is a discrepancy between the user's viewpoint and the camera's position. A prototype was developed to construct a pancake window optical system using only parallel elements to effectively shift the camera's virtual viewpoint backwards. Imaging from the designed viewpoint was confirmed. Among the most problematic stray lights in this optical system and the resulting artifacts, the proportion of stray light due to surface reflection from a 1/4 wavelength plate was the highest. Additionally, the contrast was measured when preventing this wavelength plate's surface-reflected light. The frequency bandwidth was sufficient at 15[cpd], but the contrast was low, starting from the lowfrequency domain at 0.6.},
 title = {平行パンケーキウィンドウ光学系を用いたビデオシースルーHMDにおけるカメラと目の位置の一致},
 year = {2024}
}