| 摘要 |
An optical navigation device determines relative movement between the optical navigation device and a navigation surface. The optical navigation device includes a light source, an image sensor, and an eccentric field imaging lens. The light source illuminates a navigation surface. The image sensor generates a navigation image of light scattered off of the navigation surface. The eccentric field imaging lens is disposed between the navigation surface and the image sensor. The eccentric field imaging lens includes multiple lens surfaces which are tilted at different oblique angles relative to the navigation surface to direct the light scattered off of the navigation surface toward the image sensor.
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