Optical navigation module

An optical navigation module for receiving control from an object, the optical navigation module comprising:

• a module surface above which the object is disposed;
• a light source located under the module surface and configured to project a first cone of light to the object along a first optical axis through a first optical construction;
• a light sensor located under the module surface and configured to detect a second cone of light that is resulted from the first cone of light being reflected by the object along a second optical axis through a second optical construction, and thereby to collect a spatial intensity profile of the reflected light;
• and
• a data processing unit electrically connected to the light sensor;
• wherein:
• the intersection of the first optical axis and the second optical axis is below the module surface;
• the data processing unit is configured to convert the subsequent change of the spatial intensity profile collected by the light sensor into information regarding the motion of the object;
• and
• the module surface is the outermost surface of a window plate that is made of material that selectively transmits the light emitted by the light source.

An optical navigation module for receiving control from an object, the optical navigation module comprising:

• a module surface above which the object is disposed;
• a light source located under the module surface and configured to project a first cone of light to the object along a first optical axis through a first optical construction;
• a light sensor located under the module surface and configured to detect a second cone of light that is resulted from the first cone of light being reflected by the object along a second optical axis through a second optical construction, and thereby to collect a spatial intensity profile of the reflected light;
• and
• a data processing unit electrically connected to the light sensor;
• wherein:
• the intersection of the first optical axis and the second optical axis is below the module surface;
• the data processing unit is configured to convert the subsequent change of the spatial intensity profile collected by the light sensor into information regarding the motion of the object;
• and
• the second optical construction comprises an aperture.