nMouse
update:
n1995
mouse prototype used linear arrays
n1999
Agilent ADNK-2610 optical mouse sensor
n2D
image sensor
n1500
frames/s, 18x18 sensor
n400
CPI (counts per inch)
nSpeeds
up to 12 IPS
nhttp://cp.literature.agilent.com/litweb/pdf/5988-9774EN.pdf
nUsed
in most optical mice including Microsoft’s and Apple’s