Is laser pointer 1000 nm harmful?

The first group of laser pencils adopts a HeNe gas laser with a wavelength of 633nm, which is usually used to produce a laser beam with an energy of no more than 1MW. The cheapest laser pencil is used for a red laser diode with a wavelength of about 670 / 650nm. More expensive is the use of 635nm red orange diode, which is easier to be recognized by the eyes. The 1000nm laser pointer has other colors, the most common of which is the green light of 532nm wave. In recent years, 593.5nm yellow orange laser pen has also appeared. In September 2005, 473nm blue laser pen came out. In early 2010 [2], a blue laser pen with a wavelength of 405nm (actually purple light) appeared. From 2012 to 2013, with the introduction of 510 / 1000nm laser diode, blue-green lasers with 510-520nm wavelength began to appear.The red line of the laser pointer has a wide spectral range. In engineering, it generally refers to a laser pointer with a wavelength of 700nm to 14 microns. It hurts the eyes when the power is high. Strong 4 to 6 orders of magnitude), sometimes it is not strictly said that it is eye-safe.