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Keep in mind they are zoom type with more optics inside. Zoom is great but not everywhere.

The input aperture is not the same as the input beam. :wave: For 5 mm input beam you would need a larger aperture than 5 mm. imho, for 5 mm aperture the 1 mm beam is good. With 17x you would have a ~17mm beam and that would pass through 25 mm exit easily. A 2 mm beam will enter well but at...

You probably wanted to say chromatic aberrations. Still a multi-wavelengths laser needs lenses with minimal chromatic ab.

That's a solid reason that they are used to collimate laser diodes. If the length is not a problem, a short focal length lens with a telescope will make you a wide well-collimated beam.

Don't expect a great spot with a PCX lens.

It's feasible though needs a lot of cash, like those laser :gun: killing drones or other flying objects. Also dealing with a laser able to burn things around combustible materials, the OP will need a fire station nearby too.

Take any single mode laser and work on optics to get a desired divergence. Hint: a telescope helps a lot. If you have some other constrains, then you need to spell them out.

My guess is that the edge is black painted. Germanium and silicon - due to a high refractive index, IR lenses are simpler, and mostly singlets. Though, who knows what is that without seeing through. :can: OP could tell if a lens transmits light. What is a focal length. Can even try to measure...

You had 3 months to review your own design by suggestions and simple looking at other experience on other threads. Instead you just keep yourself busy by distracting from real work :fightin: Get serious or you'll be vaporized with 1.8 W :lasergun:

Those will be imported from a parallel universe who developed a technology to make it cheap, fast, and good :shhh:

Plane on one side, asphere on other (plane/asphere) from Thorlabs site https://www.thorlabs.us/drawings/4cada5c14cedad98-41D20E67-E073-3298-7B73F9A5DF831877/A230-AutoCADPDF.pdf Convex / asphere...

Diamond is a better material in terms of head conduction. Other properties who caries LOL Lasers "in the sky with diamonds" :na:

The "Absurdity" got the Nobel Physics prize LOL "for decisive contributions to the LIGO detector and the observation of gravitational waves"

Nope. Some are >505.

Sorry, if i'm late. The first post has pictures. To me it looks the lens will be not used or it will have a very short focal length. Then the beam will be huge. As it is a battery operated device, and looks like a laser pointer - will have troubles selling or deal with lawyers when someone...

Laser Diodes: My experience - many collimating lenses are plane/asphere. Only a small portion of asphere / asphere. We use only a multi lens system (all kind of achromats) for very specific applications. 532 nm laser - this laser has a very different laser beam properties (small initial...

Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please How has an engineer decided to use screws? Looks all possible kinds Probably the enemy will have a tough time to re-engineer :whistle: What is a big round cylinder for on right side?

Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please Estimating as a palm size looking at lens holders ~6 mm - 9 mm and typical capacitor sizes.

Laserbuilder, what is your experimental setup right now? (this thread as I see was started half year ago) As I remember a Brewster plate is not coated - it's just a not too thin not too thick glass or fused silica plate orientated at a Brewster angle. Though don't know for lasers with double...

If the beam is collimated, then the divergence is the minimum, isn't? :crackup: Anyway, the text in pdf says that it will be "3.6° (perpendicular), 0.5° (parallel)"; not clear how the two (if the same structure as G85) will overlap. ML562G85 has 9 deg x 65 deg