3d model with calculated rays
https://drive.google.com/drive/folders/1N5prznE7T5teokbPvmfrxCqePam5666S?usp=sharing Hello Sir, I'have calculated the rays of an 18mm diameter, 26,5mm BFL achromatic singlet for printed resin's material properties. And I've uploaded the 3d models to the link above, so that you can try it out. It may need some improvement for the chromatic aborations, and focal length adjustments for your setup. We can talk about those after your experiment's result. I'm excited too hear about how it will go. Have a nice day. /Baran
Public Clarification Board
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Contest Holder - 2 years ago
Somebody will print me the model you made with a resin printer. Then I will test again and if it works I will assign it to you. But give me a bit more time as it takes some time.
- 2 years ago
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baranyildizz
- 2 years ago
Ok :thumbsup: Waiting for the good news
- 2 years ago
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Contest Holder - 2 years ago
no the lens is absolutely not clear with FDM I tried several temperatures and also one with only 0.02mm layer thickness, no transparency :-(
- 2 years ago
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baranyildizz
- 2 years ago
Wow, 0.02mm is extreme. Maybe you can try sanding it than use that lens for mold making. I think it should be easier to make a lens with clear resin molds rather than printing
- 2 years ago
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baranyildizz
- 2 years ago
But materials like clear epoxy for casting would have different refraction indexes. So i should update the lens design for the new material. Like in this video: https://www.youtube.com/watch?v=TN9tHJXXlKs
- 2 years ago
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Contest Holder - 2 years ago
Hi I printed it on my FDM printer but it did not work with this, it is what I expected. I am looking now for sombody who prints it for me as a test before I buy one, so please be a bit patient. Would an achromatic lens with 5mm diamter also be only 5mm high with let say 12mm focal length? Just to see if the geometric relations are about the same, thanks for your response.
- 2 years ago
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baranyildizz
- 2 years ago
Hello, i think scaling everything down should work, and cause the focal length to decrease proportionally. Like 5/18=x/26,5 So the scaled focal length is 7,3611mm. But it’s not strict and can be changed with new calculations for the lens design
- 2 years ago
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baranyildizz
- 2 years ago
I can add a rim around the edge like in this lens if needed? https://www.edmundoptics.com/document/download/492699
- 2 years ago
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baranyildizz
- 2 years ago
By the way, i tried simulating the lens in this technical drawing and it didn't worked, it's just for representational purposes i guess :)
- 2 years ago
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baranyildizz
- 2 years ago
The rim might prevent the entering rays being reflected from the sides and getting mixed into the outcome as a noise.
- 2 years ago
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baranyildizz
- 2 years ago
And how was the file formats and resolutions? What is your preference for next uploads?
- 2 years ago
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baranyildizz
- 2 years ago
Will it be a clear lens with normal FDM Printer? I'm waiting for your result.
- 2 years ago
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Contest Holder - 2 years ago
Hi sir I am printing it now on my normal 3d printer, in the moment I do not have a resin printer, but I use this model as sample print first when buying a resin printer, let you know as soon as possible. Anyway i will send you a picture of the printed part. ;-)
- 2 years ago
