The Fact About Laser Pointers

The Fact About Laser Pointers

Laser pointers have been around since visible red laser diodes have been on the market which means they're older than most of the youngsters who purchase them. Laser pointers are typically made from direct laser diodes or diode pumped solid state ( DPSS ) lasers. Direct diode pointers are available in red or violet (made from Blu-Ray lasers at 405 nm WL "nanometers wavelength") and direct diode green will likely quickly be available because of an organization called KAAI who developed them for the laser projector market.

Red laser pointers are available in a wide range of wavelengths resembling 635 nm, 650 nm, 660nm, 670 nm.

DPSS laser pointers are typically available at the following wavelengths, (blue) at 473 nm, (green) at 532 nm and (yellow) at 589 nm and (orange) at 593 nm. Because the human eye is most sensitive to the colour green with a peak apparent brightness at 555 nm this means all different seen colors seem less bright despite the identical energy level. The difference in obvious color brightness is basically expressed in this ratio with green at 514 nm being (1) then blue at 488 nm being (2.6 times less than green) and red at 647 nm being (4.6 occasions less than green). The previous ratios and wavelengths can all be present in an Ion mixed fuel Argon/Krypton, white light laser used by skilled laser show companies. The color brightness ratios will range in line with the wavelengths but the above ratios provided would give you correct white light color balance. To sum it up a 1 watt green laser at 514 nm appears to be as brilliant as a 2.6 watt blue laser at 488 nm and as brilliant as a 4.6 watt red laser at 647 nm. You would need to consult a shade chart to match obvious brightness of other laser wavelengths.

A few things to consider If you want to purchase a DPSS laser pointer is the power stage and the way in which the diodes are operated. What I imply about power ranges, is the actual power stage measured at the working wavelength. Since a typical green DPSS laser pointer has several laser wavelengths involved to generate a frequency doubled visible output, unless the manufacturer provides good filtering, the power you measure at 532 nm may also be from the opposite 2 IR laser wavelengths. You may actually get cheap laser pointers that output infra-red light (808 nm and 1064 nm) almost as high as seen light, which may be very harmful and deceiving to someone who thinks they bought a paper burning energy house. The other thing about DPSS laser pointers is the best way the pump diodes are operated, which may be pulsed (turned on and off at a fixed frequency) or CW fixed wave (on continually). It's very easy to find out Should you bought a pulsed DPSS laser pointer as you will see a chopped up line should you move the beam rapidly throughout the wall or ceiling.

The final concern with laser pointers is the largest, which is security because of the ever rising energy output available today. Typically laser pointers are limited to 5 milliwatts however there are manufacturers that seem to cater to shoppers who want more power like Depraved Laser in China who present pointers which are more like flashlights, outputting energy levels as high as 500 milliwatts in green or red. It also does not take a rocket scientist to purchase a uncooked laser diode and driver to make their very own higher than legal laser pointer.

To offer a perspective on power ranges, a 5 milliwatt green laser at 532 nm can be enough to dazzle your night time adjusted vision and possibly cause an automotive accident at say a hundred toes from the source. In contrast a 500 milliwatt green laser may easily cause permanently damage to your vision, Laservisier begin fires by burning paper or different flamable supplies at quick range and positively distract an airline pilot approaching a runway at a distance of a mile or two. Security is everything with regards to laser pointers.

Il Comitato Processione Venerdì Santo

ringrazia la famiglia Aviani e la famiglia Centoscudi, per la disponibilità dei terreni senza i quali la Sacra Rappresentazione non sarebbe così suggestiva.
Un ringraziamento allo Studio GSG di Bagnoregio e a Mario Mecarelli per le fotografie utilizzate.
Si ringrazia inoltre chi direttamente o indirettamente contribuisce alla realizzazione dell'evento ed un grazie particolare va a tutta la comunità di Vetriolo che da anni partecipa sentitamente alla Rappresentazione del Venerdì Santo.

 

contattaci