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February 5, 2026

Influence of ambient temperature changes on the focus point for measurements of the modulation transfer function MTF

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Authors

HDHanno DierkeMSMarkus Schake

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Overview

This investigation reveals how ambient temperature affects the focus point in optical measurements, implying its significance in accuracy.

Key Points

  • The aim is to explore how changes in ambient temperature affect the focus point used in measuring the modulation transfer function (MTF).
  • Developed a multi-camera measurement setup for MTF determination.
  • Evaluated MTF at a datum point within a ±20° angular range from the optical axis.
  • Compared various methods for determining the focus point.
  • Investigated the impact of temperature on focus point positioning.
  • The focus point position significantly varies with changes in ambient temperature.
  • Different methods for determining the focus point yield varying results based on temperature.
  • Temperature changes critically affect the precision of MTF measurements.

Cite This Study

Dierke et al. (2025) studied this question.

synapsesocial.com/papers/6984345ff1d9ada3c1fb2704https://doi.org/10.1051/jeos/2025012/pdf
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