5mW 645nm Red Laser Module, retail $TBA (www.shawohwa.com)
Manufactured by Shawo Hwa Industrial Co., LTD (www.shawohwa.com)
Last updated 03-05-09

This is a small, pre-wired red diode laser module. That is, it already includes the optics assembly, and it's ready to connect to any source of 3 volts DC that you happen to have handy; whether that's a pair of 1.5 volt AAA or AA cells, a 3 volt lithium CR2 or CR123A cell, or a "wall wart" type AC adapter that you know has an output of 3 volts DC and can deliver at least 25mA.
It comes prepped with power wires, approximately 5.5" (~13.65cm) in length.

The laser module is ready to go as soon as you receive it.


To use the laser module, just connect it to any source of 3 volts DC via the included wires. Red is (+) positive, white is (-) negative.
There is no on/off switch; if you wish to use one you will have to supply and connect it yourself.

Because this device runs from any source of 3 volts DC, this section will contain very little additional information.

A lithium CR123A cell measures 3.24 volts loaded (with the laser module connected and operating).
Consumes 20.2mA on the same CR123A cell (3.24 volts), using my DMM's 200mA scale.

This photograph is of the business-end of the laser module, showing the aperture and lens.

Because this is a component designed to be installed in something, and not a flashlight, I will not beat it against a steel rod, stomp on it, try to drown it in the toilet, run over it, or bestow upon it other misfortunes that may be bestowed upon flashlights, so this section of its web page will be relatively bare.

I currently do not have the equipment necessary for measuring output power, but it appears to emit somewhere between 4mW and 5mW, right about where it ought to be for a CDRH Class IIIA laser device.

Wavelength appears to be 640nm to 645nm, again, right about where it should be for this device. This product uses a diode laser, so it can be operated at low voltage (3 volts) at low current (just over 20mA).

Beam photos, first at ~12", then at ~5', then at ~12'.

Note the ~12' photo has a slightly out of focus beam;
the laser module moved horizontally during the photograph.

In the top two photographs, the beam is smaller and not whitish in real life.
In the last photograph, the beam appears to be of the right diameter, but is not whitish.

Spectrographic plot
Spectrographic analysis of this laser module.
USB2000 spectrometer graciously donated by P.L.

Test unit was received on 07-09-04.

UPDATE: 09-27-04
I have decided to rate this product 5 stars and place it in this website's Trophy Case.

Low current consumption
Uses batteries or any other source of +3 volts you can find
Appears to output the power it is advertised to
Good beam quality
Includes the proper laser warning sticker

Not waterproof or submersible - but no bare laser module is. Will not affect rating

    MANUFACTURER: Shawo Hwa Industrial Co., LTD
    PRODUCT TYPE: Red laser module
    LAMP TYPE: Laser diode
    No. OF LAMPS: 1
    BEAM TYPE: Very narrow, it's a laser ;-)
    BEZEL: Brass; lens slightly recessed
    ACCESSORIES: Laser warning (CDRH Class IIIA) sticker


    Star Rating

5mW Red Laser Module * www.shawohwa.com

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