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1. (WO2018139510) PHASE MODULATOR, PHASE MODULATOR CONTROL METHOD, AND FRINGE PROJECTION DEVICE

Pub. No.:    WO/2018/139510    International Application No.:    PCT/JP2018/002210
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Fri Jan 26 00:59:59 CET 2018
IPC: G02F 1/01
G01B 11/25
Applicants: OLYMPUS CORPORATION
オリンパス株式会社
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
日本電信電話株式会社
Inventors: WATANABE Daichi
渡邊 大智
KATAYOSE Satomi
片寄 里美
WATANABE Kei
渡邉 啓
KURATA Yu
倉田 優生
KASAHARA Ryoichi
笠原 亮一
Title: PHASE MODULATOR, PHASE MODULATOR CONTROL METHOD, AND FRINGE PROJECTION DEVICE
Abstract:
A phase modulator 10 comprises: one or more waveguides provided on a substrate 12, including at least a first waveguide 21; and a plurality of heaters provided on the substrate 12. The plurality of heaters include a first heater 31 for heating the first waveguide 21, and a second heater 32 for heating a location separate from the first waveguide 21. The plurality of heaters are driven such that the total power consumption thereof is constant. The plurality of heaters may be driven such that the amount of change in the power consumption of the first heater 31 and the amount of change in the power consumption of the second heater 32 balance out one another.