Design of a Large-Format Low-Light Imaging System Based on the RGB Filter Wheel
Round 1
Reviewer 1 Report
Authors demonstrated all the experiments and theorical calculations precisely. This research work is more advanced and helpful for military and flight aviation technology. However, the authors need to revise below minor suggestions before acceptance.
…Fig. 1, 2, 5 & 8 not clear visible lines/words. Need to revise it.
Page 14, line 366. Figure 16. Mention figure names like (a) & (b) on the images and realign sentences 367 for figure 16.
Page 15, Line 414, check reference citation..like Journal Article 2013?. And many such references need to be revise it.
Author Response
Response to Reviewer 1 Comments
Point 1: Fig. 1, 2, 5 & 8 not clear visible lines/words. Need to revise it.
Response 1: The image has been updated, and the lines and text in the image have become clear.
Point 2: Page 14, line 366. Figure 16. Mention figure names like (a) & (b) on the images and realign sentences 367 for figure 16.
Response 2: Revised according to suggestions.
Point 3: Page 15, Line 414, check reference citation..like Journal Article 2013?. And many such references need to be revise it.
Response 3: Revised according to suggestions.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
This work demonstrates the design and process of developing and validating a low-light (0.01 lux.) imaging system. The subject of this manuscript aligns with the research interest of the special issue "Optical Imagining and Measurements", illustrating in detail a technological application. The study is well-designed and presented in a simple yet detailed manner.
I have just a few minor suggestions for the authors.
Firstly, I recommend additional references in several places in the text (especially in the introduction section) for the sake of comprehensiveness and support of the context.
I suggest combining certain images into a single figure to achieve a more concise text. (Figures 1 & 2, Figures 4 & 5, Figure 6 & 7 & 8, Figures 10 & 11)
Figure 16, I suggest ensuring clarity by making it clear that both two images (a) captured by a conventional camera and (b) by the low-light imaging system represent the same picture (same size, showing the color target in both pictures).
Please review some minor typos (e.g.: lines 192-193, the reference at line 143).
Author Response
Response to Reviewer 2 Comments
Point 1: Firstly, I recommend additional references in several places in the text (especially in the introduction section) for the sake of comprehensiveness and support of the context.
Response 1: According to the suggestion, references have been added in the introduction section
Point 2: I suggest combining certain images into a single figure to achieve a more concise text. (Figures 1 & 2, Figures 4 & 5, Figure 6 & 7 & 8, Figures 10 & 11).
Response 2: Figure 1 shows the working principle of the system, while Figure 2 is an optical system designed based on system indicators. The structural relationship between the two is a pre and post relationship, making it difficult to merge them together. Figure 4 shows the calculation model of ground imaging width, while Figure 5 shows the calculation model of forward image shift, which is different and not easy to merge. Figures 6, 7, and 8 have the same problem, and they are logically related and not suitable to be merged together. And if Figures 10 and 11 are placed together, it may appear that the images are too complex and not conducive to reading and understanding
Point 3: Figure 16, I suggest ensuring clarity by making it clear that both two images (a) captured by a conventional camera and (b) by the low-light imaging system represent the same picture (same size, showing the color target in both pictures).
Response 3: I have replaced image (a) to ensure that the scene of image (a) and image (b) is basically the same.
Point 4: Please review some minor typos (e.g.: lines 192-193, the reference at line 143)..
Response 4: Revised according to suggestions.
Author Response File: Author Response.pdf
Reviewer 3 Report
Authors designed and tested an innovative system for true-color imaging in low-light environments using a large-aperture, low-distortion optical lens and an RGB filter wheel capable of multi-line sequential exposure. This system was tested and proved to be suitable for true-color imaging with an environmental illuminance of 0.01 lux. This research content of this manuscript aligns with the theme of the special issue “Optical Imaging and Measurements". And the findings and design methodology presented in this study have reference value for the design of airborne low-light imaging equipment.Therefore, I think this study can be accepted after minor revision.
There are some problems, which may be solved before it is considered for publication.
I suggest bolding the explanatory text in the image to ensure clarity. (Figures 1, 2,8,10,11,12)
It seems that explanatory text is missing in Figure 6, such as the imaging system?
Pay attention to the units after the numbers and remove spaces. (Line 143,176,179,212,254)
Missing reference on line 292, check.
I suggest checking your references and revising them to ensure that the format is correct and in compliance with citation standards.
It can be accepted for publication if the author makes supplementary changes according to the comments of the reviewer.
Moderate editing of English language required
Author Response
Point 1: I suggest bolding the explanatory text in the image to ensure clarity. (Figures 1, 2,8,10,11,12).
Response 1: Revised according to suggestions.
Point 2: It seems that explanatory text is missing in Figure 6, such as the imaging system?
Response 2: Indeed, the “lens” was lost.
Point 3: Pay attention to the units after the numbers and remove spaces. (Line 143,176,179,212,254).
Response 3: All such issues have been revised.
Point 4: Missing reference on line 292, check.
Response 4: Revised according to suggestions.
Point 5: I suggest checking your references and revising them to ensure that the format is correct and in compliance with citation standards.
Response 5: Revised according to suggestions.
Author Response File: Author Response.pdf
