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Scotopic vision this is level of light so low that you can't even see color of that laser... Everything you see in colors is in photopic range of human vision, this is why 589nm looks brighter than 473nm. It is closer to photopic peak sensitivity of 683lm/W at 555nm If you turn down the...

Re: FS: 500++mW RGB ILDA DMX Laser Projector 15K+Pangolin QS 2.0 FB3+ILDA 100 ft Cabl It's a pity that it's US restricted :whistle:

They are comparable and please don't take their described parameters seriously. For example, 1.2 vs. 1.5mrad.. Despite different companies they are the same in terms of beam quality - low quality. There is kind of beam lottery with cheap lasers.. Usually it is 3,5mm diameter and 1.5-2mrad of...

I can't light a match with my laser, I've had only white wick and white wax candles to try, maybe I should try red candles for better energy absorbtion?

Green laser next to four ArmyTek Predator flashlights in the eye of my Sigma 10-20 f/3.5 EX DC HSM. These four lights ale equipeed with rainbow of four Cree XP-G LED's favours... warm 90CRI 3000K neutral 5C 4000K greenish S2 2T 5500K cool R5 1C 6500K

If he pass the beam in reverse direction through such an expensive lens, an unknown physical phenomena can occur, such as light bending, beam beading or negative refractions. He shouldn't try this at home with 6000$ lens.. :D Trevor, please make some test shots when you receive your camera, I...

You've just wasted 6000$ for it becouse it's not working as beam expander. To make a beam expenader from this lens you should spend 1500$ extra and buy this small lens: Canon Normal EF 50mm f/1.2L USM Autofocus Lens 1257B002 B&H and then it will work as 8x beam expander. This lens I recommened...

Where I can buy this voltage monitor? Price? Dimensions? I have at least three project which I can incorporate it in.

I bought it from DJNY. I made some changes to the optics and electrical path so it has a bit more power. :) It's hard to determine height of that cloud cover but it was low and solid... maybe 100-200m. It's low stratus cover from moist advection right after warm front in the warm section of...

Thank you! I really enjoy such a cloud cover. My friend told me he saw green laser reflections over the town from 2,5km distance in straight line! It must be fantastic view but I wasn't encourage enough to give somebody my laser and to tell him go far and shine it over the sky. You never know if...

Yeah! My town is safe this night! ;)

Just as title says... :)

Re: My first RGB laser :) Very good simple build:) You should deffinitely get more powerful green module. Where did you get that dichros from?

I can see the 5mm diameter beam of 600mW 532nm laser in the room without smoke during sunny afternoon. Once, I clearly saw the beam in broad sunlight outdoors, when my neighbour made some smoke from hay. :p Another experiment I made with my friend - he clearly saw the beam from my bigger laser...

It would be good if it run the IR diode on 2000mA! But this diode is case positive, if you check it's not a problem to run the diode on negative voltage I'm in. :yh:

I'm sorry May I repeat my question, can it drive 2-5W IR diode from 1x18650 cell?

Can it be run on negative voltage for use with case-positive 808nm IR diodes? I need stable 2000mA driver for 1x18650, which will not damage diode and which will be cool-running, not 3W of additional heat like linear regulator.

Now the connection speed is about its maximum, in the evening there will be total traffic jam on the lines.. :(

Hi, I'm sorry for quite newbish question but I have no time for comprehensive searching of the laser vendors offer last days due to much work. I have to buy some laser wavelengths for demonstration purposes of laser technology progress. I have beautiful and powerful green >500mW laser (thx...

I think that tremendous G-forces which appeared during the impact onto the hard surface caused melting and vaporising diode's internal wires and after resublimation they crystalised near the emitter creating kinda superconductor on its surface. Now you can drive it with full 10A of current and...