Search results

Look here. https://jtechphotonics.com/ Good company.

You may want to contact "Lifetime17". I recently purchased a very nice 405 complete pointer that approaches 2W from him.

Any 10k pot will do. Yes, it can be adjusted under power.

ganis622... spam, maybe porn. did not open pm.

I think there are aliens. I also think that they would consider the human race unremarkable and a minor curiosity at best. There are no resources on this planet that are not easily available elsewhere in the solar system and in the galaxy. Further, human beings are far too high maintenance to...

Pics Please. I may be interested in tinkering with them.

The PL530 OPSL is not that hard to power. It does require a heater circuit. Basically, it just needs 2 LM317 circuits. One for CC to the diode and one for CV to the heater. A simple Al heat sink is adequate, no TE. Green sensitive plates are available from Thor and Integraf. I don't remember all...

I would recommend starting with transmission holograms first just to get the hang of it. They are simpler and more forgiving. Reflection holograms are far more demanding. Everything has to be perfect. Also, viewing a reflection hologram can be difficult. It may look like a blank plate until you...

To measure coherence length set up interferometer as shown in the post I referenced with the two mirrors equal distance from the beam splitter. Move one mirror further and further away from the splitter until you can no longer get a nice interference pattern on your screen. The distance you were...

Use interferometer to determine coherence length of laser. It must be at least several inches or more. Even the slightest vibration during exposure will ruin hologram. Exposure time should be seconds, not minutes. Even at 5mW 2-3 seconds should be enough. Are you using glass plates? Are you...

I read that Edmund Optics now has the ability to custom polish and coat crystal ends which would eliminate the need for external mirrors.

Saw your picture on the tape. Something is definitely wrong. BTW I am using single 18650 battery.

I have a nearly identical laser here that is fully functional. The beam in the dark is nothing to write home about. To see it clearly requires smoke or dust or maybe spray a mist of water in the beam path. Adjust focus and shine it on a piece of black electrical tape. It should instantly smoke...

You got me curious (thanks!) so I tried this with 2214 SL 488. I also see the halo even with the actual beam in shadow. It is not noticeable with room lights, only in darkened room.

If you want reliability go to Edmund Optic$.

I once had a problem with one of their pointers because the black coating was on the tail cap threads preventing good contact.

https://www.ebay.com/itm/184685903981?_trkparms=ispr%3D1&amdata=enc%3AAQAFAAAAkAxbj8gu7l1oU2zDN0lI9nchl76rjjJrOJFlpAgmE0t47uATY%2Bauz%2BtujHZnxf362F2vBUWyDCQQI%2FgCNWqJ%2FeHI0vvQ2bT81HKqNUZOqLj3ECHd39ptdDQBxLYx12tYy3i8v0e1Z4lzOt923hqoDBXtzghsUrCSD367NP%2BJdZn%2FlG%2BxJbOYa73MLE08ydmIxQ%3D%3D&chn=...

https://www.edmundoptics.com/p/model-1145p-21mw-linear-polarization-lumentum-hene-laser/17389/

In product description it states that at 12v input, max output is 120 watts... so at 75v out, max amp out would be 1.6. Also, dummy load is necessary for testing and adjustment.