Packaged optical device having a specular reflection configuration

Patent metadata

Field	Value
Publication number	US-9823115-B2
Application number	US-201615047104-A
Country	US
Kind code	B2
Filing date	Feb 18, 2016
Priority date	Jul 12, 2012
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A packaged optical device includes a light source device emitting light to an object surface, a sensor chip receiving reflective light reflected from the object surface, and a non-lens transparency layer located in front of the sensor chip. The light and the reflective light have a first main optic axis and a second main optic axis, respectively, and the first main optic axis and the second main optic axis are configured to form the specular reflection configuration, thereby enhancing images received by the sensor chip. The non-lens transparency layer has a zone passed through by the second main optic axis, and transmittance of the zone is lower than that of other zones of the non-lens transparency layer, thereby preventing the sensor chip from being saturated.

First claim

What is claimed is:

1. A packaged optical device having a specular reflection configuration, the package optical device comprising:
a package frame having a first compartment, a second compartment, a first opening and a second opening;
a light source device bonded in the first compartment such that the light source device may emit light to pass through the first opening to project onto an object surface, wherein the light has a first main optic axis;
a sensor chip bonded in the second compartment such that the sensor chip may receive reflective light passing through the second opening, wherein the reflective light is reflected from the object surface and has a second main optic axis;
a first non-lens transparency layer embedded in the package frame at the first opening, and having at least a portion sealing up the first opening and
a second non-lens transparency layer embedded in the package frame at the second opening, and having at least a portion sealing up the second opening and a zone passed through by the second main optic axis;
wherein the first main optic axis and the second main optic axis are configured to form the specular reflection configuration, and transmittance of the zone is lower than that of other zones of the second non-lens transparency layer;
wherein the light source device is bonded to the package frame with a bonding angle;
wherein the bonding angle is controlled to adjust direction of the first main optic axis.

2. The packaged optical device of claim 1 , further comprises a lens located in front of the light source device to adjust direction of the first main optic axis.

3. The packaged optical device of claim 1 , wherein the at least a portion of the second non-lens transparency layer is doped with photochromic material and is configured to change transmittance under different light intensity of certain wavelength.

4. The packaged optical device of claim 1 , wherein the at least a portion of the second non-lens transparency layer is doped with optical filtering material.

5. The packaged optical device of claim 1 , wherein the at least a portion of the second non-lens transparency layer is coated or pasted with a layer of optical filtering material.

6. The packaged optical device of claim 1 , wherein the at least a portion of the second non-lens transparency layer is coated or pasted with a layer of electrochromic material.

7. The packaged optical device of claim 1 , wherein the second non-lens transparency layer comprises glass or plastic.

Assignees

• Pixart Imaging Inc

Inventors

• Shen Chi-Chih
• Chen Hui-Hsuan
• Chang Yen-Min

Classifications

• G01J1/0407

  Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings · CPC title

• G01J1/0418

  using attenuators · CPC title

• G01S17/04

  Systems determining the presence of a target · CPC title

• G01S7/4816

  of receivers alone · CPC title

• G01S7/4918

  Controlling received signal intensity, gain or exposure of sensor · CPC title