I´m using an old Keyence VK-9700 laser microscope, for which I can only save .vk3 files.
The file opens fine in Gwyddion but the dimensions (X, Y and Z) are not as expected (not as I have them using the VK Analyzer). It is especially problematic for the Z dimension, from which I want to measure a step height.
Is there a way to rescale the dimensions properly upon opening the file and how can I find the right rescaling factor?
I attached 2 files as example (one measured with the x20 objective, one with the x50 objective).
The X,Y dimensions given by the VK Analyzer software are:
- x20: X=703.824 µm, Y=527.696 µm
- x50: X=283.371 µm, Y=212.459 µm
For the Z direction, the step height should be around 280 nm and, with Gwyddion, I get values of about 880 nm.
Thank you in advance for any hints regarding this problem,
Kind regards,
Heloise
Thanks for the files and information. The dimensions in Gwyddion are indeed very strange. I will have to look into it.
I do not actually have any VK3 file format description (and just one other sample file). I have documentation for VK4 and guessed how to read VK3 files based on that. But it might not be correct.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
The good news is that if I read the scaling factors four bytes earlier I seem to get the correct dimensions in all directions.
The bad news is that I do not really know why. Meaning I do not understand how the VK3 measurement conditions record differs from VK4. I am reading a bunch of odd numbers which do not make sense.
Is it possible to display all the measurement conditions like date & time, peak mode, sharpening level, speed, distance, optical zoom, pmt parameters, shutter parameters, white balance, etc. in the Keyence software? Could you make a screenshot or something? I can at least try to compare then.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Thanks for the screenshots. I think I figured out the difference between VK4 and VK3 measurement conditions. They should now be imported correctly including the metadata.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Thank you for your help.
I just tried again (after reinstalling Gwyddion) and I´m still not getting the correct Z step height, after simply opening the file (X is right and I could change Y in the units and dimensions window). Did I maybe miss something on how to import the file?
Thanks again and kind regards,
Heloise
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Sorry, ‘now’ means it is corrected in the development version (and will be in the next stable version, that is 2.67). You can download a development snapshot from the project's website.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hello,
I´m using an old Keyence VK-9700 laser microscope, for which I can only save .vk3 files.
The file opens fine in Gwyddion but the dimensions (X, Y and Z) are not as expected (not as I have them using the VK Analyzer). It is especially problematic for the Z dimension, from which I want to measure a step height.
Is there a way to rescale the dimensions properly upon opening the file and how can I find the right rescaling factor?
I attached 2 files as example (one measured with the x20 objective, one with the x50 objective).
The X,Y dimensions given by the VK Analyzer software are:
- x20: X=703.824 µm, Y=527.696 µm
- x50: X=283.371 µm, Y=212.459 µm
For the Z direction, the step height should be around 280 nm and, with Gwyddion, I get values of about 880 nm.
Thank you in advance for any hints regarding this problem,
Kind regards,
Heloise
Thanks for the files and information. The dimensions in Gwyddion are indeed very strange. I will have to look into it.
I do not actually have any VK3 file format description (and just one other sample file). I have documentation for VK4 and guessed how to read VK3 files based on that. But it might not be correct.
I have some good and some bad news.
The good news is that if I read the scaling factors four bytes earlier I seem to get the correct dimensions in all directions.
The bad news is that I do not really know why. Meaning I do not understand how the VK3 measurement conditions record differs from VK4. I am reading a bunch of odd numbers which do not make sense.
Is it possible to display all the measurement conditions like date & time, peak mode, sharpening level, speed, distance, optical zoom, pmt parameters, shutter parameters, white balance, etc. in the Keyence software? Could you make a screenshot or something? I can at least try to compare then.
Dear David,
Thank you for looking into it and sorry for my late reply.
I made a screenshot of the measurement conditions for both files from my original post.
Let me know if the info there is not sufficient.
Thanks again and kind regards,
Heloise
Thanks for the screenshots. I think I figured out the difference between VK4 and VK3 measurement conditions. They should now be imported correctly including the metadata.
Hello David,
Thank you for your help.
I just tried again (after reinstalling Gwyddion) and I´m still not getting the correct Z step height, after simply opening the file (X is right and I could change Y in the units and dimensions window). Did I maybe miss something on how to import the file?
Thanks again and kind regards,
Heloise
Sorry, ‘now’ means it is corrected in the development version (and will be in the next stable version, that is 2.67). You can download a development snapshot from the project's website.