In-Process Measurement of Three-Dimensional Deformations Based on Speckle Photography
Round 1
Reviewer 1 Report
Line 61 - Did you considered maybe using 2 cameras and reconstruct a model using Stereophotogrammetric principles?
Line 87 - did you considered recalibrating the camera after each measurement, or just once when you started the measurements?
Author Response
Dear reviewer,
thank you very much for the remarks and comments.
Regarding question 1:
Multiscopic approaches with more than one camera have so far been ruled out for two reasons and therefore not discussed in the state of the art. On the one hand, there are cost reasons for a second high-speed camera to be procured. On the other hand, the available space in the processing machines is often very limited, so that the measuring system should be as small as possible. Another important point is the robustness of the measuring system consisting of only one camera and one laser, which would decrease with each additional component.
In future work, however, investigations into the robustness of multiscopic systems with several cameras for 3D deformation measurement are indeed planned. Results here, however, are only to be expected in a follow-up project with the appropriate resources starting in 2023.
Regarding question 2:
Currently, the optical measurement system is calibrated only once before each series of measurements using calibration grids in the in-plane plane. In the future, it is planned to calibrate the system during the measurement series using a three-axis piezo. For this purpose, defined displacements are to be set in each case and even distortions of the optical measuring system are to be eliminated via a comparison with the measured displacements.
With kind regards
Andreas Tausendfreund
Author Response File: 
Author Response.docx
Reviewer 2 Report
1
Applied Sciences No. 1230968 Peer Review
Lines 2-3: correct: title
In-process Measurement of Three-dimensional Deformations Based on Speckle Photography
Lines 27-28: correct: [1-3]
The functionality of technical surfaces is significantly influenced by the manufacturing process [1-3].
Lines 33-35: correct: [4-6]
Therefore, the targeted material modifications are only adjusted via the machining parameters or process
variables of the machine tools in an iterative way [4-6].
Lines 51-54: correct: [12-15]
The in-process capability and suitability of the speckle photography method for two-dimensional
deformation measurement in the image plane with resolutions of less than 20 nm [11] has already been
demonstrated in several manufacturing applications [12-15].
Lines 60-61: correct: Khodadad et al. [16]
In this context, Khodadad et al. [16] propose a combination of speckle photography and speckle
interferometry.
Lines 65-67: correct: Khodadad et al. [16]
The determined measurement uncertainties here are significantly lower than in the approach of Khodadad
et al. [16] and are in the range of one tenth of the wavelength.
Lines 77-79: correct: Fricke-Begemann [17]
Accordingly, this paper is organized as follows: Section 2 describes the challenges of three-dimensional
deformation measurement by speckle photography, especially in deformation evaluation according to
Fricke-Begemann [17].
Lines 111-112: correct: (3) to (8)
The shift components Δx, Δy of the maximum are then obtained from the equations (3) to (8) as follows
[18]:
2
Lines 151-154: correct: Figure 2b; Figure 2c
The cross-correlation allows for separating the in-plane and out-of-plane displacement information by
evaluating the shift of the correlation maximum (see Figure 2b) and the broadening of the normalized
cross-correlation function (see Figure 2c), respectively.
Lines 158-159: correct: (1), (5) and (8)
According to the equations (1), (5) and (8), the width components for the ?̂- or ?̂-direction read
Line 205: correct: Results of In-process Measurements in a Deep Rolling Process
3. Results of In-process Measurements in a Deep Rolling Process
Line 275: correct: Conclusions and Outlook
5. Conclusions and Outlook
Lines 303-305: correct: see Instructions for Authors
Author Contributions: see Instructions for Authors
Other comments:
For figure size see: Instructions for Authors
For References list see: Instructions for Authors
Comments for author File: 
Comments.pdf
Author Response
Dear reviewer,
Thank you very much for your comments.
All comments have been considered and incorporated in the revision.
With kind regards
Andreas Tausendfreund
Author Response File: Author Response.docx
