For example, a blue Laser pointer with a specific wavelength of 473 nanometers usually has the same basic structure as a green laser. Many factories started producing blue laser modules, mass storage devices, and laser pointers in 2006. This is a semiconductor pumped frequency doubling device. They most often emit 473 nm, which is a 946 nm diode-pumped laser radiation frequency doubled beam ND: YAG laser or yttrium vanadate crystal. BBO crystals with high output power are used as KTP crystals as lower power multipliers.
Some manufacturers are selling indicators with parallel blue laser diodes that can measure power of more than 1500 milliwatts. However, since the claimed power of the "laser pointer" product also includes infrared power (only in semiconductor pumping technology) is still in the beam (for reasons discussed below), based on the stricter visible blue DPSS type Component, the laser engraver still has problems is usually not applicable information. Due to the use of higher neodymium harmonics, the frequency multiplication conversion efficiency is low. A small part of the infrared power is in the optimal configuration of the semiconductor pump module. The conversion rate of 473 nm blue laser is usually 10-13%, which is about half. Typical green laser (20-30%).
The blue and white laser pointer was originally a 473nm blue laser produced by DPSS, with low power and unstable. As CASIO developed a hybrid light source high-brightness projector containing a blue laser diode (445nm), blue semiconductor diodes (type 4) with a power exceeding 1000mW were mass-produced and promoted.
Laser pointers, also known as laser pointers and pointing pens, are pen-shaped transmitters designed to be portable, easy to hold, and processed into laser modules (light emitting diodes) through visible lasers. Common laser pointers include red light (λ=650~660nm, 635nm), green light (λ=515-520nm, 532nm), blue light (λ=445~450nm) and blue-violet light (λ=405nm).
The working principle of the blue laser pointer is composed of a radio frequency remote control and a receiver (USB interface). The RF radio frequency remote control is embedded with a wireless RF radio frequency transmitter. When using, just plug the receiver into the USB interface of the host computer. No need to install the driver to work normally. The user only needs to click the relevant function keys of the RF radio frequency remote control to operate the receiver. The transmitter does not have to be aimed at the receiver, which truly embodies wireless freedom.