Real-time detection and elimination of nonorthogonality error in interference fringe processing

Journal Article · Fri May 20 00:00:00 EDT 2011 · Applied Optics

DOI:https://doi.org/10.1364/AO.50.002140· OSTI ID:22036625

Haijiang, Hu; Fengdeng, Zhang

In the measurement system of interference fringe, the nonorthogonality error is a main error source that influences the precision and accuracy of the measurement system. The detection and elimination of the error has been an important target. A novel method that only uses the cross-zero detection and the counting is proposed to detect and eliminate the nonorthogonality error in real time. This method can be simply realized by means of the digital logic device, because it does not invoke trigonometric functions and inverse trigonometric functions. And it can be widely used in the bidirectional subdivision systems of a Moire fringe and other optical instruments.

• OSTI ID: 22036625
• Journal Information: Applied Optics, Vol. 50, Issue 15; Other Information: (c) 2011 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACCURACY
DETECTION
EQUIPMENT
INTERFERENCE
OPTICAL EQUIPMENT