LPF Site Supporter
- Jan 29, 2014
Another set of these cheap laser pointer pens arrived and were measured as following:Ebay cheapie China pointer power measurements:
Max Output Power: 5mW. Use laser pointer to point at any targets on projection screen,video. 3 Laser Pointer(without battery). Laser Color: Green+Red+Purple. Wavelength: green 532nm / red 650nm / purple 405nm.www.ebay.com
I purchased three sets of RGB (blue really 405 nm violet) pointers and measured the following output powers:
650 nm Red: 6, 8, 9 mw
532 nm Green, 14, 40, 74 mw (74 mw green was about 20 mw of infrared, so really about 54 mw of green. These DPSS pointers were not very stable, the power varied up and down 25% of these values, to the full peak power shown here).
405 nm violet, 25, 49, 52 mw.
Measured using a Coherent LPM (smaller thermopile in photo) and a Thorlabs power meter for the lower power pointers.
650 nm Red: 8.5, 11, 11.5 mw
532 nm Green: 17, 25, 32 mw (these DPSS pointers were not very stable, the power varied up and down from 2/3 of these values, to the full peak power shown here).
405 nm violet: 32, 50, 54 mw