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US09201524B2 Lensless optical navigation device for directing radiation via reflection by three total internal surfaces 有权
用于通过三个总内表面反射引导辐射的无镜头光学导航装置

Lensless optical navigation device for directing radiation via reflection by three total internal surfaces
Abstract:
An optical navigation device for use with mobile telephones and the like is disclosed, which has a reduced height as compared with current designs. The navigation device comprises a laser such as a VCSEL laser, an exposed user surface and two other surfaces that provide for total internal reflection of the incident laser beam. The surfaces are constructed with shallower than normal angles, preserving the basic functionality of the device while reducing the height.
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