Does Laser Pointer cause retinopathy?
Red: very cheap laser, there are ordinary laser. The shorter red wavelengths are obvious, but the longer wavelengths are less bright. Green: Very close to optimal visibility. Cats seem to prefer red. At the same time, a number of higher power (120 mW) 404-405 nm "purple" laser designators are already on the market, which are not based on GaN, but DPSS frequency doubler technology using 1 watt 808 nm GaAlAs infrared diode lasers. An LED is simply a semiconductor diode (PN) junction that emits a wide spectrum of light. The light will be different. We have different types of leds that can produce different colors (or wavelengths).
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Like the infrared driven green laser pointer designator above, such devices are capable of popping balloons and lighting matches, but this is the result of the unfiltered high-power infrared component of the beam. When a bright laser beam hits a flock of geese, only one of them needs to startle to signal that the whole flock is fleeing. This means you don't have to cover the whole flock. Bright laser beams hit birds they don't know, so they instinctively run away, which spooks the birds. A laser is a device that produces coherently focused beams of light. But instead of focusing, the LED has a diffused laser designator. It's used in flashlights. The straight path of a high intensity beam produced by a laser. Led is an omnidirectional light source.
2021-12-07 11:47:39
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