What is the difference between a cheap laser pointer?
Speaking of laser pointers directly, you may not have much idea, but when it comes to the bald head in the optical drive, it may be easier to understand. In fact, in the common computer optical drive, the semiconductor laser laser pointer is one of the core components of the optical head. It is generally composed of a double-heterostructured gallium aluminum arsenic (AsALGA) ternary compound. It is a near-infrared semiconductor element that emits The wavelength of the light is 780 ~ 820 nm, and the rated power is generally 3 ~ 5 mw. Small laser pointers are cheap, and they are often sold around schools by vendors. They are bought by “bear kids” who don’t know the truth. There are many cases of eye injuries caused by each other, but the scary thing is that it’s not just the children. Many parents don’t know the harm if they don’t understand it.
Tags
Technology
A Laser pointer price, characterized in that it includes: a laser pointer mouse, the laser pointer mouse includes a laser emission module, a wireless emission module, and a button module respectively connected to the laser emission module and the wireless emission module, the button module includes: The laser switch key, the control left button and the control right button, the wireless transmitting module is used to send out the control signal of the control left button or the control right button; a projector, the projector is connected to the operating system or has an operating system built in, The projector includes a wireless receiving module, a projection display module, a camera module, and a central processing module. The wireless receiving module is used to receive control signals sent by the laser pointer and mouse; the camera module includes orientation and the projection display module. For cameras with the same projection direction, the central processing module obtains the projection screen through the camera, and obtains the position of the laser spot on the projection screen by the difference between the brightness of the laser and the projection screen; wherein, the laser pointer mouse When performing spot positioning, by sequentially moving the laser spot to the four corners of the projection screen and pressing the control left button respectively, the central processing module associates the projection screen with the four corners of the operating system screen in a one-to-one correspondence; When the control left button or the control right button of the laser pointer mouse is pressed, the central processing module sends the relative position information of the laser spot on the projection screen to the operating system, so that the operating system is in the corresponding position on the operating system screen Perform the operation of the left mouse button or the right mouse button.
2021-09-09 11:27:41
Your Answer: