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
Tableau de clarification publique
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Titulaire du concours - il y a 2 ans
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.
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baranyildizz
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Ok :thumbsup: Waiting for the good news
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Titulaire du concours - il y a 2 ans
no the lens is absolutely not clear with FDM I tried several temperatures and also one with only 0.02mm layer thickness, no transparency :-(
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baranyildizz
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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
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baranyildizz
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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
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Titulaire du concours - il y a 2 ans
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.
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baranyildizz
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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
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baranyildizz
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I can add a rim around the edge like in this lens if needed? https://www.edmundoptics.com/document/download/492699
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baranyildizz
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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 :)
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baranyildizz
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The rim might prevent the entering rays being reflected from the sides and getting mixed into the outcome as a noise.
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baranyildizz
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And how was the file formats and resolutions? What is your preference for next uploads?
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baranyildizz
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Will it be a clear lens with normal FDM Printer? I'm waiting for your result.
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Titulaire du concours - il y a 2 ans
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. ;-)
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