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To use the 555 output to feed a blanking drive circuit I would recommend a method that would lightly load its pin 3, i.e. a digital buffer. Another 555 could be used for this buffer and its output would then feed whatever scan driver circuit you have. I should add that a CMOS inverting buffer...

Thanks for the Files!:)

Thanks for the Files!:)

Thanks Lasermaster1977. I'm reliving some of the same joys that Greg has. Currently not using any laser diodes at the moment. Just using some old HeNe's and a DPSS laser I had laying around. I was just going to use a scanner to test blanking. I'll see if I can put together a circuit that...

Congrats Kevint! Nice image results, too. Many times it is just the simple things. You couldn't use the 555's output directly as a blanking signal since it is 0-15v. Some some down scaling and buffering would be needed to get down to a 0-5v signal. But, I don't recall what you are using for...

Belive me, if anything generated visible light at any practical power level in a transverse discharge, prior to the practical blue laser diode, it would have been on the market. Neon generates exceptionally weak visible pulses in a transverse discharge, so do some very exotic excimers....

I totally agree, I also prefer the retrace line. It adds that natural analog feel to the image which I really enjoy. The main purpose for asking the question is to try to understand where these blanking signals come from and in this case could the 555 time pulse be that source. But all in all,...

"Well you can contribute all you want but that doesn't give you the right to talk down to people." Your duties to moderate there don't give YOU the right to talk down to people. Where in the TOS does it say posters must answer questions with a positive, helpful attitude? You're a moderator, not...

Its difficult to accept when a "greybeard" says no, because, at least in my experience, their information is out of date. I'm not saying that's the case here, but saying no to a question, and then saying "because I've worked with lasers since the 1980's" when they ask why it wont work, does sweet...

go on thorlabs and pick the exact optics you want and post here or LP.

Is this in addition to your YAG project to focus 808 nm into the crystal? Beam expanders are easy, you don't necessarily need an AR coated lens for 808 nm as an output expander, it won't be as efficient, but not that much loss, not needed for a pointer output unless your diode is sensitive to...

I understand the want for a nice and clean spiral but I actually like the retrace lines!

I'm primarily looking for cylindrical lenses to build a telescope to expand the beams from individual laser diodes. For that, I need short concave lens and longer convex lens, for eg. -4mm and +40mm. Additionally, I need (preferably M9) collimators for the diodes, but I found a few options here.

We, the members at the time, all saw it and you bragged about it in the discourse group. Not only are you incorrigible, you are a liar. How about the threats to show up at another forum members home with a shot gun? That didn't happen either?

SUCCESS!!! You are not going to believe what the issue was. Lasermaster1977 your advice was priceless. I took each part of the circuit and checked for appropriate output signals following your advice. I saw that the JFETs were triggering properly, I was seeing trigger signals through...

This seller on ebay might have them, but not listed. He had some fiber to convex 808 nm lenses with AR coating in the past and not expensive, as they go. You could remove the fiber, or leave it on to interface to a FAP. What kind of laser is your 808 nm coming out of? Simple diode, or? What are you...

Or he could have simply said (as I did) that its more complicated than creating an electrical discharge in argon to make an argon ion laser. There is a middle ground between saying "no it wont work" and giving a full lesson on the mechanics of gas lasers, just saying. Its difficult to accept...

Well you can contribute all you want but that doesn't give you the right to talk down to people. I have never called you a name but you have insulted me plenty of times. You're a grown man. Act like an adult. I have nothing against you despite your rancid attitude. Yes 10+ years between your...