LOL I bought 2, not the whole stock.
Yeah same behavior, I'm guessing this is an attempt at a driver soft start. Are you using AAA's or a 10440 and a spacer? The latter works pretty well for me.
I haven't tried the 10440 yet. The listing said 3 or 3.6 volt so I was a little weary about using a charged 10440 which would be 4.2v but I will give it a go and see what happens.
Yeah, they restocked a few after I posted that. They must be watching us!
They definitely be watching.
These 593.5nm lasers use MCAs, the frequency summing crystal and the Nd:YVO4 have been glued together and the mirrors have been coated onto the ends, this removes the need for careful alignment of the seperate optics, they also use very low powered pumps, only about 300mw, they are constructed very similarly to a cheap 532nm pen laserThe pointers finally came in, the "561" measures in at 559nm and the "591" comes in at the expected 593.5nm with both the red and green lines. Using some soft jaws in the vice you can pull the module and driver out of the pen host. The shiny gold tip just unscrews from the module after that.
Another wavelength added to my chrome pen collection!
Why is 593.5nm so inexpressive all of sudden?
607nm and 532nm is not the same. ND:YO4 crystals have positive thermal lensing that makes resonator stable. Pr:YLF has engative themrla lensing so won't work in flat/flat (coating based) resonator.Yes!
The technology to do a few different wavelengths is out there. However the sales volume isn't there. It would be "easy" to make a single crystal that puts out 607nm. But very few people are actually down to spending >100$ on rare wavelengths.
So with low volume comes high price.
I mean after getting the crystals/coatings done, its the same process as the the 532nm dpss that are dirt cheap. Even cheaper than green diodes and these can be brought for under 15$ in quantity. And still: green pointers are 532nm dpss not 520nm diodes.
I assume that these crystals where made for a different use case. Lets face it the modules/pointers are likely CNI.
They likely used NOS or crystals from OEM modules. They may even face business difficulties in these times and wanted to make a quick buck by getting known working stuff out to a small but waiting customer base.
I am just wondering why these are described as "591nm", I assume it has something to do with the fact that the original manufacturer does not want to be associated with "pointer kiddos"..
After all pointers must have been a very profitable business for CNI but they still discontinued them. Might be because the science / laser industry looks down to companies that make pointers.
Taking a look at lasence makes that point clear: the 555-575nm modules where "dirt cheap" for the quantity they where selling. However after they started working with Frankfurt Laser and with real science business people, the price suddenly shot up to >800$..
No modules for pointer kiddos anymore form lasence.. at least for the masses, as very few people would spend 800$ for a module.
Keep in mind: that's just my personal opinion / speculation. I am not sure which company makes these and what the actual reason is.
So take everything written here with a big tablespoon full of salt
it would as they grind flat ones in bulk before cutting individual crystals out.
