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So your objective is to focus a laser beam. It's simple then. Expand the beam by allowing it to expand naturally or by placing a negative focal length optic followed by a positive focal length optic in the beams path. It's practical to use two lenses. The wider a beam is expanded the smaller the...

I read most of your posts but did you state your objective? I believe what is being said are two things: avoiding beam truncation and spherical aberration.

They are reputable. Just have patience.

Way back when red laser pointers were the only pointers, there was a site demonstrating how to burn with such a pointer. The only modification was optical manipulation of the beam.

This might narrow your decision. "Wicked Lasers guarantees delivery to every country in the world except US, CA, AU, CH, and NZ, or we'll send a complete refund including shipping. It's our mission to ensure that Wicked Lasers customer is a customer for life. Handheld lasers over 5mW cannot be...

Edmund Optics because unlike other optics companies the variety, pricing, technical information are all up front on the site.

No. The law speaks of importation. However, the reality is different. It's unlikely anything would happen.

What am I looking at specifically?

Not much. I wonder how long the fiber might be?

One step at a time. First is to observe the dimensions of the spot size at various working distances. (That's unknown as far as I can tell). Then you'll know which diameter & focal length collimating lens will do the job. Personally G labeled lenses would not be my first choice. (Off the top of...

You said this. My mistake. I wasn't soley using that drawing. The photos coroborate the Hamamatsu drawing being plano-aspherical. It's plano aspherical because the radius of curvature becomes greater further from center. This lens is "U" shaped compared to a plano-convex which would have a...

Note the Hamamatsu fac lenses all have focal lengths under 1mm. They won't catch all of the beam if set further from the diode. They are I think plano-aspherical as indicated by the drawings.

Cylindrical pairs are used to circularize a laser's beam. If the objective is to not do so than one lens can be use to beam shape.

Linear spot = line

YT channel Smarter Every Day. A demonstration on various smart devices.

What parts are shown in the photo?

I'm not a Canuck so can't offer a further opinion. From the same site. https://www.ccohs.ca/oshanswers/phys_agents/lasers.html

You're out of luck. If I were you I'd purchase a fine tip soldering iron. https://www.canada.ca/en/health-canada/services/health-risks-safety/radiation/everyday-things-emit-radiation/lasers-hand-held-pointers.html

See this. https://slickscreen.github.io/laser-tools/brightness/

The damage appears no worst than typical dermal laser ablation.