USA flag logo/image

An Official Website of the United States Government

Phase-Shifting Interferometric Strained-Stress Analyzer

Award Information

Department of Defense
Award ID:
Program Year/Program:
2011 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Physical Optics Corporation
Electro-Optics Systems Division 1845 West 205th Street Torrance, CA -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2011
Title: Phase-Shifting Interferometric Strained-Stress Analyzer
Agency: DOD
Contract: N68335-11-C-0017
Award Amount: $79,998.00


To address the Navy"s need for a nondestructive inspection tool to measure strained stresses in metallic components, Physical Optics Corporation (POC) proposes to develop a new nondestructive Phase-Shifting Interferometric Strained-Stress Analyzer (PISSA) system based on absolute optical phase measurements with an electronic speckle pattern interferometer (ESPI). This system can nondestructively and quantitatively measure the state and magnitude of a sustained stress present in a primary aircraft structure and on complex surfaces to assess susceptibility to environmentally assisted cracking in structural components. The PISSA system will improve flight safety and reduce inspection cycles for aircraft during fleet operations and directly addresses the Navy need for a nondestructive depot-level inspection tool. In Phase I, POC will demonstrate PISSA system feasibility by constructing and testing a laboratory prototype and providing diagnostics to determine the potential for crack initiation resulting from hydrogen embrittlement. In Phase II, POC will refine the system design and develop and demonstrate a full-scale PISSA system that can be effectively implemented in an environment equivalent to that of Fleet Readiness Centers (FRCs) without significantly disrupting the workflow or degrading the reliability of the data.

Principal Investigator:

Shilpa Pradhan
Team Leader
(310) 320-3088

Business Contact:

Gordon Drew
Chief Financial Officer
(310) 320-3088
Small Business Information at Submission:

Physical Optics Corporation
Photonic Systems Division 20600 Gramercy Place, Bldg. 100 Torrance, CA -

EIN/Tax ID: 330118051
Number of Employees:
Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No