Funny laser pointer party
2016年12月5日(月) 05:00〜2017年12月1日(金) 00:00
Funny laser pointer party
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That is why you don't see it spreading out unless you measure carefully, or just measure its size far away from the laser.If you tried to hit the moon with a green laser , you'd want to use a BIG beam- 8 meters (24 feet) in radius.In contrast, if you shone your handheld laser at the moon, it would expand to over 60,000 meters (~40 miles) wide!A gaussian-shaped laser beam is one of the only types of light beams that actually spreads out by this minimum amount.
Contemporary laser beam expander designs are afocal systems that developed from well-established optical telescope fundamentals.Beam expanders are used in applications such as laser scanning, interferometry, and remote sensing. A laser beam expander is designed to increase the diameter of a collimated input beam to a larger collimated output beam.In a laser beam expander design, the placement of the objective and image lenses is reversed.The beam divergence is dependent upon the diameters of the input and output laser beams.
When a pilot gets blinded by a laser pointer from the ground, detecting the source is not a problem, at all. If everyone in the world shined a laser pointer at the moon at the same time, would we be able to see it?A laser pointer doesn’t put out much light, and even seven billion of them doesn’t represent a whole lot when spread over vast areas of the lunar surface a quarter million miles away.It should be substantially easier to simply be an astronaut on the moon and see a laser shined from earth.
I'd like a laser pointer that shows a large (solid if possible) rectangle.Is there any way to change the shape of the light projected by one of those cheap (<$5) laser pointers to project this?If you ebay "laser pointer tips" it comes up with pointers with 50 different tips which should all project something different.What would be really cool would be a way to make these laser heads myself.Instead of using a laser, why not just use a really high power LED?
Don't worry about your eyes. I feel 100% confident they were unaffected by the Red Laser pointer used on you. In real life lasers always become unfocussed the farther they travel anyway so I doubt you could cause much harm with errant shots even if we did model their entire feasible range into the game.One of Australia's experts in lasers said to me oce that you could pretty much stare into a laser.Go in there there is no laser beam that can hit you since for you it doesn't exists in the first place.Lasers have an upper range of 3km or so in game so that wouldn't happen.
The laser products include 5 series: high energy, high power, high stability, low noise and single longitudinal mode laser. CNI lasers have stabilized power, easy operation, reliable performance and long lifetime. Free space or fiber-coupled (SM fiber, MM fiber, homogenization fiber) output available.The new 589 nm bright yellow pointer from Laserglow is noticeably brighter and more ''yellow'' than the original 593.5 nm Rigel series yellow lasers.
In 2006 many factories began production of Laser Sight modules for mass-storage devices, and these were used in laser pointers too.Some green lasers operate in pulse or quasi-continuous wave (QCW) mode to reduce cooling problems and prolong battery life. The 5 mW green laser pointers (class IIIa) are the safest to use, and anything more powerful is usually not necessary for pointing purposes.Green laser pointers can come in a variety of different output powers.Blue laser pointers in specific wavelengths such as 473 nm usually have the same basic construction as DPSS green lasers.