US 12,241,731 B2
Displacement measurement device, non-contact input apparatus, and biological micromotion measurement apparatus
Yuki Abe, Kanagawa (JP); Suguru Sangu, Kanagawa (JP); Toshiki Yamanaka, Osaka (JP); and Ryo Saito, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Yuki Abe, Kanagawa (JP); Suguru Sangu, Kanagawa (JP); Toshiki Yamanaka, Osaka (JP); and Ryo Saito, Kanagawa (JP)
Filed on Feb. 14, 2023, as Appl. No. 18/168,781.
Claims priority of application No. 2022-040520 (JP), filed on Mar. 15, 2022.
Prior Publication US 2023/0296369 A1, Sep. 21, 2023
Int. Cl. G01B 11/00 (2006.01); G01B 11/02 (2006.01); G01B 11/14 (2006.01); G01S 17/58 (2006.01); G06V 10/62 (2022.01); G06V 40/20 (2022.01); H04N 23/71 (2023.01)
CPC G01B 11/002 (2013.01) [G01B 11/026 (2013.01); G01B 11/14 (2013.01); G01S 17/58 (2013.01); G06V 10/62 (2022.01); G06V 40/20 (2022.01); G06V 40/28 (2022.01); H04N 23/71 (2023.01)] 13 Claims
OG exemplary drawing
 
1. A displacement measurement device comprising:
an irradiator that irradiates a measurement object with coherent light;
a luminance-change coordinate point detector that detects a luminance-change coordinate point where a luminance change has occurred, based on light reflected from the measurement object, and output data related to the luminance-change coordinate point; and
circuitry configured to calculate an amount of displacement of the measurement object, based on the data related to the luminance-change coordinate point, by performing computations of a first numerical sequence and a second numerical sequence,
the first numerical sequence including a set of first elements each representing a location of the luminance-change coordinate point extracted from the data, and
the second numerical sequence including a set of second elements each representing a location of the luminance-change coordinate point extracted from the data.