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Ahhh, now I see what "dtr" means... Just for sake of curiosity, who run's that website and business? I'm not gunna get burned when purchasing stuff at that website like a burned laser diode... Reliable, honest people selling laser stuff?

I'm all ears, taking notes, please don't be shy...

Well finally I found some valid information. So from what I understand with your concept, I need to obtain "G2 lens" (I have seen them advertised at random times when purchasing laser modules) from "dtr". If you do not mind, can you please elaborate what "dtr" means? The reason why I say it's...

I'm reading about Gaussian beam... That is a good idea, I'll donate to this forum. Hopefully that will change the minds of the experts in this forum to discuss about valid improvements of an open source project. I'll donate to both this forum and to "LDgraphy". But honestly I have the mind of...

Its truly sad smart people that gets banned... I'll try to find and shoot him a message.

You're obviously the individual I primarily seeked for in this forum who actually understands and reads people's post correctly. Dupont has another document for their photoresist which states that the photoresist is sensitive to the wavelength around 300-450nm, at page 5...

Wow... was it so hard so say that I had to pay to get "consultation" for such focal point. Lets be honest achieving 0.01mm with +/- 0.01m tolerance focal point isn't rocket science. But anyhow I wouldn't mind paying for valid schematics for optics to start with. As long you're not beating me...

Obviously you're too dumb to comprehend anything. There's always a troll in a forum thats crashing this thread and thats you. Go back up the tree and go eat a banana monkey. I'm here talking with intelligent people to get some ideas. Someone needs to stop you from trolling around. Just because...

Yes, this particular laser module can be focusable but just for the sake of my own clarity, would like to know how I can implement a more advanced controlled method of achieving 0.01mm focus point at the etching/exposing/marking surface. I did find some books and articles of using a CCD camera...

I too don't have much knowledge with lithography (hence why I'm asking question in a laser/optic forum) but, yes, exposure is energy dependent. The datasheet for the photoresist specifically tells the optimal energy exposure to be in the range of 50-200 mJ/cm2. I could increase the laser power...

Well that escalated really quickly... those specifications has no meaning to me. I need to use it for photoresist with a tolerance of 0.01mm You're talk about something that is not related to what this thread is asking for, how can I achieve 0.01mm spot size? Go troll else where if you don't...

Here is the link where I'm planning to buy the module, lots of good reviews...

I can't find any information on the internet for such basic task. What are the proper steps, procedure, tools, optics and materials needed to focus a 405nm laser close to 0.01mm (tolerance +/-0.01mm) all day long? It's going to be this laser module: NEJE 405nm 3500mW Laser Module Thanks.

I want to learn and design custom laser driver boards for pulsing. Will this book help for that?: spiedigitallibrary.org/ebooks/TT/Powering-Laser-Diode-Systems/eISBN-9781510608467/10.1117/3.2268619?SSO=1 It seems this book is only good for continuous wave powering, I don't see any of the table...

Alright so I just purchased a used "Laser Scanning Unit" for a "HP LaserJet M2727nf", it was the lowest price I could find on eBay that is advertised as good working condition and not stated as refurbished. This particular LSU can scan at 1200 DPI horizontally, which is pretty much high...

Well thank you for you interest with my problem for this project. I have the same question in mind, but I am not an optics expert. I have read and done many research of "LDI" and all the "enthusiast hackers" have said that the lens that are built into the laser printers have no meaningful...

First and foremost Thank you for quick reply. Yes, I have seen this particular one on eBay few days ago. A used f-theta lens, with some kind of silt at it's input area. So I am completely puzzled and have no idea how I can use this f-theta lens to work with 1 axis polygon laser scanning...

Honestly I didn't want people to say: "oh, use toner transfer, and call it a day". (This is why I haven't mentioned about the main objective for why I want to build a laser scanning device) I'm sure there are many folks here who fabricates their own PCB at home and doesn't like to wait half a...

I couldn't find the correct naming for f-theta lens that are non-cylindrical. It seems like everyone in the optic industry likes to call both the "non-cylindrical" and "cylindrical" F-theta lens, without any added differentiation. Anyways I will get in contact with that company, Thanks.

Alright I'm designing a laser scanning device that uses a polygon mirror motor found in laser printers. The laser beam must always be in focus to get the highest resolution scans, therefore all laser printers uses a "F-Theta" lens so that the laser beam focal point will always be in focus for...