It is Wireless mouse which we can easily use just to tie USB receiver of compact Dimensions.
We realize operation at almost all places without choosing type, color of material. It includes superior reading performance and flattery characteristics and can operate pointer just as wanted.
Glass side which by applying technique of dark-field microscope, and detecting dynamic scattering by extremely minute irregularities and dust, is water-clear, as for the varnishes, use on every operation side is possibility.
By using interference phenomenon of laser beam, can pick up normal slight irregularities that can detect if it is optical and is completely flat using LED.
It is operable at glass side and Transparent sheet, the top of carpet that wavelength uses short blue light-emitting diode in comparison with red LED, light reflects to small irregularities and dust, and to reach sensor.
Using infrared rays LED having low operating voltage is optical. Power consumption is smaller than BlueLED and red LED, and battery of Wireless mouse lasts a long time.
Of before using red LED is optical. It is method spreading most now.