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An optical navigator sensor for sensing an image of an object comprises a substrate, a laser diode, an optical sensor device and a housing. The optical sensor device and the laser diode are fixed on the base plate and covered by the housing. The housing guides the light emitted from the laser diode

An optical navigator sensor for sensing an image of an object comprises a substrate, a laser diode, an optical sensor device and a housing. The optical sensor device and the laser diode are fixed on the base plate and covered by the housing. The housing guides the light emitted from the laser diode to the object and guides the light reflected from the object to the optical sensor device.

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What is claimed is: 1. An optical navigator sensor for sensing an image of an object comprising: a substrate; a laser diode mounted on the substrate; an optical sensor device mounted on the substrate; and a housing covering the laser diode and the optical sensor device; wherein the housing guides t

What is claimed is: 1. An optical navigator sensor for sensing an image of an object comprising: a substrate; a laser diode mounted on the substrate; an optical sensor device mounted on the substrate; and a housing covering the laser diode and the optical sensor device; wherein the housing guides the light emitted from the laser diode to the object only by one reflection and guides the light reflected from the object to the optical sensor device only by another reflection. 2. The optical navigator sensor of claim 1, wherein the housing comprises a first reflecting surface reflecting the light emitted from the laser diode to the object, and a second reflecting surface reflecting the light reflected from the object to the optical sensor device. 3. The optical navigator sensor of claim 1, wherein the housing comprises a first optical guiding unit guiding the light emitted from the laser diode to the object, and a second optical guiding unit guiding the light reflected from the object to the optical sensor device. 4. The optical navigator sensor of claim 1, wherein the housing comprises a lens focusing the light reflected from the object. 5. The optical navigator sensor of claim 1, wherein the housing comprises a light shield covering the optical sensor device and including a hole through which the light reflected from the object can pass. 6. The optical navigator sensor of claim 1, wherein the housing comprises a hole through which the light emitted from the laser diode to can pass. 7. The optical navigator sensor of claim 1, wherein the housing and the substrate are interlocked to each other by a retaining mechanism. 8. The optical navigator sensor of claim 1, wherein there is a plurality of electrodes disposed on the surface of the substrate. 9. The optical navigator sensor of claim 1, wherein the laser diode and the optical sensor device are electrically connected to the substrate via a plurality of metal wires. 10. The optical navigator sensor of claim 1, wherein the laser diode is a vertical cavity surface emitting laser (VCSEL) diode. 11. An optical navigator apparatus for sensing an image of an object comprising: a circuit board; a laser diode mounted on the circuit board; an optical sensor device mounted on the circuit board; a housing covering the laser diode and the optical sensor device; and at least one electronic device mounted on the circuit board to process the signals of the optical sensor device or to provide signals to the optical sensor device; wherein the housing guides the light emitted from the laser diode to the object only by one reflection and guides the light reflected from the object to the optical sensor device only by another reflection. 12. The optical navigator apparatus of claim 11, wherein the housing comprises a first reflecting surface directing the light emitted from the laser diode to the object, and a second reflecting surface directing the light reflected from the object to the optical sensor device. 13. The optical navigator apparatus of claim 11, wherein the housing comprises a first optical guiding unit guiding the light emitted from the laser diode to the object, and a second optical guiding unit guiding the light reflected from the object to the optical sensor device. 14. The optical navigator apparatus of claim 11, wherein the housing comprises a lens focusing the light reflected from the object. 15. The optical navigator apparatus of claim 11, wherein the housing comprises a light shield covering the optical sensor device with a hole through which the light reflected from the object can pass. 16. The optical navigator apparatus of claim 11, wherein the housing comprises a hole through which the light emitted from the laser diode can pass. 17. The optical navigator apparatus of claim 11, wherein the housing and the circuit board are interlocked to each other by a retaining mechanism. 18. The optical navigator apparatus of claim 11, wherein the laser diode and the optical sensor device are electrically connected to the circuit board via a plurality of metal wires. 19. The optical navigator apparatus of claim 11, wherein the laser diode is a vertical cavity surface emitting laser (VCSEL) diode. 20. The optical navigator apparatus of claim 11, further comprising a connecting interface set on the surface of the circuit board to receive and transmit signals. 21. The optical navigator sensor of claim 1, wherein the housing comprises a hole through which the light reflected from the object can pass and another hole through which the light emitted from the laser diode can pass. 22. The optical navigator apparatus of claim 11, wherein the housing comprises a hole through which the light reflected from the object can pass and another hole through which the light emitted from the laser diode can pass. 23. An optical navigator sensor for sensing an image of an object comprising: a substrate; a laser diode mounted on the substrate; an optical sensor device mounted on the substrate; and a covering means for covering the laser diode and the optical sensor device, guiding the light emitted from the laser diode to the object only by one reflection and guiding the light reflected from the object to the optical sensor device only by another reflection. 24. The optical navigator sensor of claim 4, wherein no reflection occurs between the object and the lens. 25. The optical navigator sensor of claim 14, wherein no reflection occurs between the object and the lens.