Study on influencing factors of measuring precision of OTF measurement instrument

Kan Zhao; Junhe Meng

doi:10.1117/12.867527

12 October 2010 Study on influencing factors of measuring precision of OTF measurement instrument

Kan Zhao, Junhe Meng

Proceedings Volume 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 765658 (2010) https://doi.org/10.1117/12.867527
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China

Abstract

Optical Transfer Function(OTF) Measurement is well known as the more accurate and more comprehensive method that is used in evaluating the imaging quality of optical systems. Nowadays almost all optical companies and national standard institutes use the OTF measurement instruments as the most reliable image evaluation systems. But in the actually measuring process, it is frequent that the measuring results of the same sample are variable by using different instruments. The reason is that the subsystems of the OTF measurement instrument have inherent errors, which made the different OTF measurement instruments have dissimilar measuring precisions. In addition, temperature and the resulting thermal expansion dynamics of the mechanical set-up become factors limiting the performance of OTF measurement instruments. In this paper, the fundamental theories of OTF measurement instrument were introduced, including its mathematical model, measuring principle, basic structure and so on. Then the influences of inherent errors of subsystems and the thermal expansion dynamics of the mechanical set-up on OTF measurement instrument were also discussed in detail. Based on the analyses of this paper, it is obvious that the OTF value measured by OTF measurement instrument can only be treated as a sort of relative benchmark. However, this relative benchmark can also produces feedback on the performances of optical systems by rule and line in time. And it always has the main effect in guiding the design, machining, assembly, debugging and any other process of production.

Citation Download Citation

Kan Zhao and Junhe Meng "Study on influencing factors of measuring precision of OTF measurement instrument", Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 765658 (12 October 2010); https://doi.org/10.1117/12.867527

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KEYWORDS

Optical transfer functions

Charge-coupled devices

Modulation transfer functions

Relays

Objectives

Spatial frequencies

Light sources

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