- Joined
- Nov 1, 2006
- Messages
- 549
- Points
- 43
This is a long post with at least 20 images on it; dial-up users please allow for plenty of load time.
25mW 780nm Adjustable Focus Diode Laser Module, retail $8.00 (http://AixiZ.com...)
Manufactured by (Unknown)
Last updated 03-02-11
25mW 780nm Adjustable Focus Diode Laser Module, retail $8.00 (http://AixiZ.com...)
Manufactured by (Unknown)
Last updated 03-02-11
This is a diode laser module that has a power output of 25mW CW (continuous wave), and is advertised to have a peak wavelength of 780nm (the ones I got have a peak wavelength of 785.45nm as measured spectrographically; this is *WELL* within spec!).
It comes in a metal body, and the focus is easily adjustable without tools from a tightly focused pinpoint to a narrow-medium spot.
To power up this module:
1: Connect it to any source of 3.2 volts DC that can sink at least 0.25A (250mA).
2: Red wire is (+) positive, black wire is (-) negative.
3: If you wish to have an on/off switch, you'll have to procure it elsewhere and connect it between one of the power supply terminals and the laser's matching power supply wire.
This laser module has a focusable beam.
To change the focus, turn the black ring at the end of the bezel (the laser's "business-end") to achieve the desired beam width. If you unscrew it too far, it will fall off - and if you aren't paying attention, a spring could shoot out as well. If it does shoot out (and you indeed notice this!), just place the spring back into the laser's barrel, and screw the lens assembly back on at least two full turns from the time it "catches".
Current usage measures 64.0mA when powering it from an Aixiz Diode Laser PSU.
This measurement was taken on my DMM's 400mA scale to help minimise shunt resistance error.
Beam photograph on the test target at 12".
The orangish color does not actually exist; the beam spot appears a very dull, dim cherry red to the unaided eye.
Power output of the first one measures 25.1193mW on a
Sper Scientific Pocket Laser Power Meter # 840011.
For a laser sold as a 25mW unit, this is basically spot on!!!
Power output of the second unit measures 138.70µw (0.1387mW) on the same instrument. Better run it through the spectrometer again and see what's going on here!!!
Spectrographic analysis of this laser module (the first one of the replacements*).
Spectrographic analysis of this laser module (the first one of the replacements*); spectrometer's response narrowed to a range of 780nm to 790nm.
As you can see, this laser's peak output is at 785.45nm.
Spectrographic analysis of this laser module (the second one of the replacements*).
Spectrographic analysis of this laser module (the second one of the replacements*); spectrometer's response narrowed to a range of 780nm to 790nm.
As you can see, this laser's peak output is at 785.45nm -- same as the first!.
Spectrographic analysis of this laser module (the second one of the replacements*) AFTER it went to pot shortly after the last series of spectrographic analyses were performed on it.
Spectrographic analysis of the defective first laser.
Spectrographic analysis of the defective first laser; spectrometer's response narrowed to a range between 670nm and 830nm.
USB2000 spectrometer graciously donated by P.L.
Beam cross-sectional analysis (X-axis).
Beam cross-sectional analysis (Y-axis).
Images made using the ProMetric System by Radiant Imaging.
TEST NOTES:
Test unit was purchased on Ebay on 02-17-11 (or "17 Feb 2011" if you prefer) and was received at 4:09pm PST on 02-19-11 (or "19 Feb 2011").
* The first unit was defective, so AixiZ sent another one (well, *TWO* actually!!!) posthaste, which were received at 4:08pm PST on 02-28-11 (or "28 Feb 2011").
Now THAT'S what I call customer service!!!
UPDATE: 00-00-00
PROS:
Focusable from fine spot to narrow (directional) flood
Relatively low power consumption
CONS:
Failure may be an issue -- I've had two of these modules bite the big one...that's what nocked the most off their rating
MANUFACTURER: Unknown
PRODUCT TYPE: Diode laser module
LAMP TYPE: Diode laser
No. OF LAMPS: 1
BEAM TYPE: Adjustable from pinpoint to narrow-medium spot
SWITCH TYPE: N/A
CASE MATERIAL: Metal & plastic
BEZEL: Metal; laser diode recessed inside
BATTERY: N/A
CURRENT CONSUMPTION: 64.0mA at 3.20 volts
WATER- AND PEE-RESISTANT: No
SUBMERSIBLE: NO WAY HOZAY!!!
ACCESSORIES: None
WARRANTY: Unknown/not stated
PRODUCT RATING:
Last edited:
