We recently bought a glass dining table and I’ve been working primarily on it wirelessly via the laptop. Apart from it being way too warm upstairs (as I’m sure I’ve complained too many of you) I’ve always liked glass tables. Give a modern, stylistic feel.
Well moving on to the point. I got tired of using the little touchpad on the laptop so I brought down my optical mouse from upstairs and to my horror it didn’t work. So after a quick search on Google my questions were answered. Technology is amazing.
Developed by Agilent Technologies and introduced to the world in late 1999, the optical mouse actually uses a tiny camera to take 1,500 pictures every second. Able to work on almost any surface, the mouse has a small, red light-emitting diode (LED) that bounces light off that surface onto a complimentary metal-oxide semiconductor (CMOS) sensor. The CMOS sensor sends each image to a digital signal processor (DSP) for analysis. The DSP, operating at 18 MIPS (million instructions per second), is able to detect patterns in the images and see how those patterns have moved since the previous image. Based on the change in patterns over a sequence of images, the DSP determines how far the mouse has moved and sends the corresponding coordinates to the computer. The computer moves the cursor on the screen based on the coordinates received from the mouse. This happens hundreds of times each second, making the cursor appear to move very smoothly.
Because glass is transparent, the signal does not bounce back. I now use a mouse pad under the mouse.