Title:
光学装置、網膜投影表示装置、頭部装着型表示装置、及び入力装置
Document Type and Number:
Japanese Patent JP7418149
Kind Code:
B2
Abstract:
An optical device includes a light source that emits light to irradiate an object, a light emission driver that drives the light source to emit light at a predetermined light emission period, a position detector that outputs a detection signal corresponding to reflected light that is the light reflected by the object, and a signal extractor that extracts, from the detection signal, a signal with a period corresponding to the light emission period by using a reference signal with a period corresponding to the light emission period, and outputs the extracted signal.
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Inventors:
Shun Sannomiya
Tatsuya Shimokawa
Hide Tanaka
Shuichi Suzuki
Tatsuya Shimokawa
Hide Tanaka
Shuichi Suzuki
Application Number:
JP2018223811A
Publication Date:
January 19, 2024
Filing Date:
November 29, 2018
Export Citation:
Assignee:
株式会社リコー
International Classes:
G06F3/0346; G02B27/02; G06F3/01
Domestic Patent References:
| JP8322004A |
Foreign References:
| US20170131766 | ||||
| WO2017037708A1 |
Other References:
三尾典克、”微小信号計測”、PP.13-15、2015年12月24日、インターネット
”同期検波を活用し、微小信号を高精度に計測”、2016年10月29日、インターネット
倉沢 一男、“位置測定におけるPSDの応用”精密機械(精機学会誌)、精機学会、1985年4月、第51巻、第4号、PP.68-75.
”同期検波を活用し、微小信号を高精度に計測”、2016年10月29日、インターネット
倉沢 一男、“位置測定におけるPSDの応用”精密機械(精機学会誌)、精機学会、1985年4月、第51巻、第4号、PP.68-75.
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Koichi Hirota
Tadahiko Ito
Koichi Hirota