US 12,265,024 B2
Shearography and interferometry sensor with multidirectional dynamic phase shifting and method of inspection and measurement of vibration modes
Sergio Damasceno Soares, Petrópolis (BR); Fabiana Dias Fonseca Martins, Rio de Janeiro (BR); Ana Lucia Fampa Seabra D'almeida, Rio de Janeiro (BR); Mauro Eduardo Benedet, São José (BR); Armando Albertazzi Gonçalves Junior, Florianópolis (BR); Analucia Vieira Fantin, Florianópolis (BR); Daniel Pedro Willemann, Laguna (BR); and Estiven Sanchez Barrera, Florianópolis (BR)
Assigned to Petróleo Brasileiro S.A.—Petrobras, Rio de Janeiro (BR); and Universidade Federal De Santa Catarina—UFSC, Florianópolis (BR)
Appl. No. 17/780,442
Filed by Petróleo Brasileiro S.A.-Petrobras, Rio de Janeiro (BR); and Universidade Federal De Santa Catarina-UFSC, Florianópolis (BR)
PCT Filed Nov. 17, 2020, PCT No. PCT/BR2020/050481
§ 371(c)(1), (2) Date May 26, 2022,
PCT Pub. No. WO2021/102539, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 1020190249463 (BR), filed on Nov. 26, 2019.
Prior Publication US 2023/0012001 A1, Jan. 12, 2023
Int. Cl. G01N 21/45 (2006.01); G01N 21/88 (2006.01); H04N 23/45 (2023.01)
CPC G01N 21/45 (2013.01) [G01N 21/88 (2013.01); G01N 2201/0634 (2013.01); H04N 23/45 (2023.01)] 8 Claims
OG exemplary drawing
 
1. A SHEAROGRAPHY AND INTERFEROMETRY SENSOR WITH MULTIDIRECTIONAL DYNAMIC PHASE SHIFTING (DPSI), comprising:
a multidirectional measurement head interconnected, on one side, to a charging or excitation module, and, on the other side, to a lighting laser, which are supported by a fixing structure, wherein the multidirectional measurement head comprises an optical prism, an objective lens, a first internal lens positioned between the optical prism and the objective lens, and a second internal lens, wherein the optical prism is positioned between the first internal lens and the second internal lens.