- Joined
- Sep 12, 2007
- Messages
- 9,399
- Points
- 113
This will be brief since there isn't too much I can say about it.
$77.29 USD shipped from AliExpress. It took three weeks to arrive with the free shipping option.
Measurements taken:
Wavelength: 511nm
Power output: 23mW
Current input: ~90mA
Beam diameter: 2.5mm x 4.5mm and adjustable focus
Divergence (at 7m): 0.5mRad
Looks like their printing department was on strike. Or maybe they've only had 4 orders so far and couldn't be bothered to upgrade the sleeve.
The 16340s are no-name brand, but they have a believable capacity rating of 600mAh. They were charged out-of-the-box. The charger isn't much heavier than a bottle cap, so I wouldn't trust it. We've got a bit of chinglish as well.
Defocused output. In case you were born yesterday: cameras often do not accurately portray laser colors. It looks green to me. Less limey than your 532 and maybe a hint of cyan, but still a definitive green.
The head unscrews to reveal the main heat sink
Diode's raw output:
But what's that affixed to the diode? It has two wires coming out of it. Could it be a photodiode for optical feedback?
If it is, it was not implemented properly. Shining light into it or blocking light from it does not change the laser's output at all. Of course that doesn't matter much since a green diode is inherently much more stable than DPSS. The heat sink unscrews, but the driver is encased in a sort of plastic sleeve with short wires running to a fixed battery spring and to the diode itself (as well as the presumed photodiode). No detail was visible, and it was not obvious to me how to disassemble it further, I'm afraid.
The driver appears to be linear, judging from the electrical characteristics. Current input to the driver in relation to voltage input:
Since the whole system will dissipate less than a watt of heat, you can leave it on as long as you like. Here is a thermograph after being left on for an hour straight.
So there you have it. It might be the best commercially-made green-diode pointer out there for the money.
Equipment used:
Science-Surplus spectrometer
Gentec TMP-310 laser power meter
Mastech HY1803DL bench power supply
Fluke 45 digital multimeter
FLIR i7 thermal camera
$77.29 USD shipped from AliExpress. It took three weeks to arrive with the free shipping option.
Measurements taken:
Wavelength: 511nm
Power output: 23mW
Current input: ~90mA
Beam diameter: 2.5mm x 4.5mm and adjustable focus
Divergence (at 7m): 0.5mRad
Looks like their printing department was on strike. Or maybe they've only had 4 orders so far and couldn't be bothered to upgrade the sleeve.
The 16340s are no-name brand, but they have a believable capacity rating of 600mAh. They were charged out-of-the-box. The charger isn't much heavier than a bottle cap, so I wouldn't trust it. We've got a bit of chinglish as well.
Defocused output. In case you were born yesterday: cameras often do not accurately portray laser colors. It looks green to me. Less limey than your 532 and maybe a hint of cyan, but still a definitive green.
The head unscrews to reveal the main heat sink
Diode's raw output:
But what's that affixed to the diode? It has two wires coming out of it. Could it be a photodiode for optical feedback?
If it is, it was not implemented properly. Shining light into it or blocking light from it does not change the laser's output at all. Of course that doesn't matter much since a green diode is inherently much more stable than DPSS. The heat sink unscrews, but the driver is encased in a sort of plastic sleeve with short wires running to a fixed battery spring and to the diode itself (as well as the presumed photodiode). No detail was visible, and it was not obvious to me how to disassemble it further, I'm afraid.
The driver appears to be linear, judging from the electrical characteristics. Current input to the driver in relation to voltage input:
Since the whole system will dissipate less than a watt of heat, you can leave it on as long as you like. Here is a thermograph after being left on for an hour straight.
So there you have it. It might be the best commercially-made green-diode pointer out there for the money.
Equipment used:
Science-Surplus spectrometer
Gentec TMP-310 laser power meter
Mastech HY1803DL bench power supply
Fluke 45 digital multimeter
FLIR i7 thermal camera
