Multispectral imaging system for short wave infrared applications

Rosenberger, Maik; Dittrich, Paul-Gerald; Illmann, Raik; Horn, Robin; Golomoz, Andrei; Notni, Gunther; Eiser, Steffen; Hirst, Oliver; Jahn, Norbert

doi:10.1117/12.2619350

Cited by 2 publications

(2 citation statements)

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“…If instead of the rectangular signal a sinusoidal signal is assumed, the contrast transfer function 𝐶𝑇(𝑓) goes directly over into the modulation transfer function 𝑀𝑇𝐹(𝑓). Basically, the contrast ratios of the pattern in the image 𝐾(𝑓) 𝐾(𝑓) = 𝐼 max − 𝐼 min 𝐼 max + 𝐼 min (6) have to be put into the ratio to the contrast in the object space 𝐾 ′ (𝑓).…”

Section: Modulation Transfer Functionmentioning

confidence: 99%

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Training program for the metric specification of imaging sensors

Illmann¹,

Rosenberger²,

Notni³

2022

Acta IMEKO

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Measurement systems in industrial practice are becoming increasingly complex and the system-technical integration levels are increasing. Nevertheless, the functionalities can in principle always be traced back to proven basic functions and basic technologies, which should, however, be understood and developed. For this very reason, the teaching of elementary basics in engineering education is unavoidable. The present paper presents a concept to implement a contemporary training program within the practical engineering education on university level in the special subject area of optical coordinate measuring technology. The students learn to deal with the subject area in a fundamentally oriented way and to understand the system-technical integration in detail from the basic idea to the actual solution, which represents the common practice in the industrial environment. The training program is designed in such a way that the basics have to be worked out at the beginning, gaps in knowledge are closed by the aspect of group work and the targeted intervention of a supervisor. After the technology has been fully developed theoretically, the system is put into operation and applied with regard to a characterizing measurement. The measurement data are then evaluated using standardized procedures. A special part of the training program, which is to promote the own creativity and the comprehensible understanding, represents the evaluation of the modulation transfer function (MTF) of the system by a self-developed algorithmic program section in the script-oriented development environment MALTAB, whereby students can supportively fall back on predefined functions for the evaluation, whose implementation however still must be accomplished.

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Section: Modulation Transfer Functionmentioning

confidence: 99%

“…For the calculations according to ( 6), ( 7) and ( 8), all values can be determined from the measurements, which is why these formulas must also be implemented by the students in the practical part. Complex examples for modulation transfer functions of spectral sensors are given in [6].…”

Section: Modulation Transfer Functionmentioning

confidence: 99%

Training program for the metric specification of imaging sensors

Illmann¹,

Rosenberger²,

Notni³

2022

Acta IMEKO

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Design of non-Gaussian multispectral shortwave infrared filters assessed by surface spectral reflectances on the ECOSTRESS library

2023

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This paper addresses the multispectral filter design problem for spectral ranges where a viewing subspace is not defined. The methodology of color filter design is extended to this case, which allows the optimization of custom filter transmittance that meets the physical constraints of available fabrication methods. Multispectral shortwave infrared filters are then designed for two scenarios: spectral reconstruction and false-color representation. The Monte Carlo method is used to verify the filter performance degradation due to deviations in fabrication. The results obtained indicate that the proposed method is useful for designing multispectral filters to be fabricated using generic processes without any additional constraints.

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Multispectral imaging system for short wave infrared applications

Cited by 2 publications

References 0 publications

Training program for the metric specification of imaging sensors

Training program for the metric specification of imaging sensors

Design of non-Gaussian multispectral shortwave infrared filters assessed by surface spectral reflectances on the ECOSTRESS library

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