To appropriately reduce an impact of zero-order light in a structure which generates a display image using a spatial phase modulator that diffracts laser light.SOLUTION: A virtual display device (H) comprises: a laser light source (11); a spatial phase modulator (13) that diffracts laser light; a diffractive optical element (14) provided on a diffracted light emitting surface-side of the spatial phase modulator (13); and a control unit (3) that controls the spatial phase modulator (13). The diffractive optical element (14) generates a phase difference through steps having regularity, and the control unit (3) causes the spatial phase modulator (13) to display a phase image obtained by subtracting the phase difference based on the regularity from a phase distribution corresponding to a display image.SELECTED DRAWING: Figure 1
【課題】レーザ光を回折する空間位相変調器を用いて表示画像を生成する構成において、0次光の影響を適切に低減する。【解決手段】レーザ光源(11)と、レーザ光を回折する空間位相変調器(13)と、空間位相変調器(13)の回折光出射面側に設けられた回折光学素子(14)と、空間位相変調器(13)を制御する制御部(3)と、を備え、回折光学素子(14)は規則性を持つ段差によって位相差を生じさせ、制御部(3)は、表示像に対応した位相分布から規則性に基づく位相差を減算して得られた位相画像を空間位相変調器(13)に表示させる虚像表示装置(H)が開示される。【選択図】図1
VIRTUAL IMAGE DISPLAY DEVICE AND VIRTUAL IMAGE DISPLAY METHOD
虚像表示装置及び虚像表示方法
2023-03-29
Patent
Elektronische Ressource
Japanisch
IPC: | G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / G03H Holografische Verfahren oder Vorrichtungen , HOLOGRAPHIC PROCESSES OR APPARATUS |
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