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Indeed, pure solvents are not necessary. I have read of people successfully using vodka or rubbing alcohol. Use of pure solvents just eliminates a variable... one less thing to worry about. As far as CNC, the most sophisticated tools I own are a vise and drill press. The trick is that anything...

EO sent a hard back catalogue today. Maybe if they spent less on catalogues, their parts would not cost so much.

https://sites.google.com/site/dtrslasershop/

Cyp really hit it on the head. Hand held diode lasers are useless for this experiment ( or nearly any other). Precision is far more important than accuracy. It's not like anyone would take one single reading and call it good enough. I did complete a set of experiments and here are the results...

Just a FYI thing. In the 4mW range, the Sperr has a resolution of .001mW. I will be using a Spectra-Physics HeNe at .75mW, target mirror will be a brand new Thor Labs 70/30 beam splitter. I have no idea what kind of accuracy or precision to expect, but I should have time to try later today.

I have a Sperr and some known mirrors, and a couple calibrated/ certified lasers. I will try it and get back to you when I have time.

Keep in mind that in an apartment, a large enough coil will wreak havoc on your neighbor's electronic devices. When I hand wound a coil years ago, I did an inch or two at a time (till I got bored) and then varnished what I had done. Also, your primary should be designed to be adjustable so that...

This company specializes in laser engravers. I have dealt with them before and have no complaints. https://jtechphotonics.com/?product_cat=laser-and-driver-combo-kits

Do you have a specific purpose in mind? There are numerous ways to build your own. An ignition coil or a flyback transformer with a 555 and a transistor or two. Either will easily give you 2 cm or more. You can also wind your own and use a neon sign transformer as primary. You can try searching...

You are correct about it being pulsed. Continuous dye lasers are beyond my amateur scope. They are usually pumped by a 5+watt argon laser and the dye flows through a high pressure jet. As far as the "poor man's" aspect goes, The capacitor was $450.00, the windows were $75.00 each, the quartz...

This project is indeed based on the old SciAm article. A few decades ago I built the Sci Am version word for word. This version has several improvements over the original. The dye cell is a bit longer and has a smaller ID(4mm). I have gone to great lengths to minimize the parasitic ends of the...

I did the first test fire of the dye laser today. To my surprise, it worked the first time. All I could think was," Wow! That's a lot of yellow." The cell itself is 4mmID x 110mm long. The electrode spacing on the lamp is 114mm. 1uF cap charged to 15KV. It even worked with the OC removed. With...

Since everyone is on thee subject of LPM's, what kind of meter would be required for dye laser pulse? It will fire single shots a minute or more apart (charge time for cap) and pulse duration is expected to be 10 to a few hundred nanoseconds, 590 nm.

Yes, I meant mirror not lens. I get mine at Edmund Optics, but they are not cheap. An appropriate diode laser with no collimating optics can be used for a simple single beam reflection type.

I try to use a front surface convex lens to spread the beam whenever possible. This avoids any imperfections caused by lenses. Your subject will need to be something bright, light in color. Coins work well for a first attempt. Good reflection holograms are difficult and require multiple beams. I...

In the original "Creature From The Black Lagoon", several of the South American crew members and a white scientist get killed. Some time later, the other scientist makes the comment that one person is dead already.

The laser, or the brick?

"It only took all freakin day! ":ROFLMAO:. I enjoy diode projects, but I really prefer other laser types. I have been working on a flash lamp dye laser for over 7 months. It may be ready for a test run today. The home built argon took a year and a half. It was extremely difficult, requiring...

I have had excellent results on several project with Osram PL450B. It is rated at 80mW, but can be adjusted lower. I just used LM317 drivers.

I read the article and then researched MEM microphone. It keys off of varying capacitance when the diaphragm moves against a silicon wafer. Just wild speculation, but a photo voltaic effect induced by laser light.:unsure: