OPTOELECTRONIC MODULE FOR SPECTRAL AND PROXIMITY DATA ACQUISITION

• US 20180073924A1
• Filed: 02/12/2016
• Published: 03/15/2018
• Est. Priority Date: 03/19/2015
• Status: Abandoned Application

• Current Assignee: Ams Sensors Singapore Pte. Ltd. (Ams-Osram AG)
• Original Assignee: Heptagon Micro Optics Pte Ltd
• Inventors: Steinmann, Lukas, Rudmann, Hartmut
• Application Number:
  US15/558,209
• Publication Number:
  US 20180073924A1
• Time in Patent Office: Days
• CPC Class Codes: G01J 1/0204 Compact construction
• CPC Class Codes: G01J 1/0266 Field-of-view determination; Aiming or pointing of a photometer; Adjusting alignment; Encoding angular position; Size of the measurement area; Position tracking; Photodetection involving different fields of view for a single detector
• CPC Class Codes: G01J 1/0271 Housings; Attachments or accessories for photometers
• CPC Class Codes: G01J 1/0411 using focussing or collimating elements, i.e. lenses or mirrors; Aberration correction
• CPC Class Codes: G01J 1/0488 with spectral filtering
• CPC Class Codes: G01J 1/4204 with determination of ambient light solar light G01J2001/4266
• CPC Class Codes: G01J 1/4228 arrangements with two or more detectors, e.g. for sensitivity compensation
• CPC Class Codes: G01J 2001/4247 for testing lamps or other light sources
• CPC Class Codes: G01J 2001/4266 for measuring solar light
• CPC Class Codes: G01J 2003/1213 Filters in general, e.g. dichroic, band
• CPC Class Codes: G01J 3/0208 using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
• CPC Class Codes: G01J 3/0256 Compact construction
• CPC Class Codes: G01J 3/0291 Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements
• CPC Class Codes: G01J 3/108 for measurement in the infrared range
• CPC Class Codes: G01J 3/36 Investigating two or more bands of a spectrum by separate detectors
• CPC Class Codes: G01J 3/50 using electric radiation detectors
• CPC Class Codes: G01J 3/505 measuring the colour produced by lighting fixtures other than screens, monitors, displays or CRTs
• CPC Class Codes: G01J 3/513 having fixed filter-detector pairs
• CPC Class Codes: G01S 17/04 Systems determining the presence of a target
• CPC Class Codes: G01S 7/4811 common to transmitter and receiver
• CPC Class Codes: G01S 7/4813 : Housing arrangements
• CPC Class Codes: G01S 7/4814 : of transmitters alone
• CPC Class Codes: G01S 7/4816 : of receivers alone

Abstract

Optoelectronic modules for proximity determination and ambient light sensing include hybrid optical assemblies configured with multiple field-of-views. The field of view in a region of the hybrid optical assembly can be dedicated to a first detector, while the field of views in another region of the hybrid optical assembly can be dedicated to both the emission of light and ambient light sensing. Embodiments relate particularly to implementation in a mobile phone or other portable electronic devices.

Claims

1. An optoelectronic module comprising:

a substrate on which are integrated a light source operable to emit light at a particular one or more wavelengths with respect to an emission axis, a first detector operable to detect light at one or more wavelengths, and a second detector operable to detect light at one or more wavelengths;

a spacer structure laterally surrounding the light source, the second detector and the first detector, wherein the spacer structure is composed of a material that is non-transparent to the particular one or more wavelengths of light emitted by the light source or detectable by the second detector or first detector;

an inner wall isolating the first detector from the light source, wherein the inner wall is composed of a material that is non-transparent to the particular one or more wavelengths of light emitted by the light source or detectable by the second detector or the first detector; and

a hybrid optical assembly laterally surrounded by the spacer structure, the hybrid optical assembly including a first region characterized by a first field-of-view and a first optical axis, and a second region characterized by a second field-of-view and a second optical axis, and a third region characterized by a third field-of-view and a third optical axis, wherein the first region is aligned with the light source, the second region is aligned with the second detector, and the third region is aligned with the first detector.

2. The optoelectronic module of claim 1 further comprising:

a first filter aligned with the first detector, wherein the first filter is transparent to the one or more wavelengths of light emitted by the light source; and

a second filter aligned with the second detector, wherein the second filter is non-transparent to the one or more wavelengths of light emitted by the light source.

3. The optoelectronic module of claim 1, further comprising:

a baffle structure composed of a material that is non-transparent to a particular one or wavelengths of light emitted by the light source or detectable by the second detector or the first detector.

4. The optoelectronic module of claim 1, in which the emission axis is substantially perpendicular to the substrate.

5. The optoelectronic module of claim 1, in which the first optical axis is substantially perpendicular to the substrate.

6. The optoelectronic module of claim 1, in which the emission axis is substantially coaxial with the first optical axis.

7. The optoelectronic module of claim 1, in which the first field-of-view is between 10°

and 20°

.

8. The optoelectronic module of claim 1, in which the first field-of-view is between 5°

and 10°

.

9. The optoelectronic module of claim 1, in which the first field-of-view is between 1°

and 3°

.

10. The optoelectronic module of claim 1, in which the second field-of-view is between 60°

and 180°

.

11. The optoelectronic module of claim 1, in which the light source emits light with wavelengths corresponding to infrared light.

12. The optoelectronic module of claim 1, in which the light source is a vertical-cavity surface-emitting laser.

13. The optoelectronic module of claim 1, in which the light source is operable to emit modulated light.

14. The optoelectronic module of claim 1, in which the hybrid optical assembly comprises an overmold that encases the second detector, the first detector and the light source.

15. The optoelectronic module of claim 1, in which the third optical axis is substantially perpendicular to the substrate.

16. The optoelectronic module of claim 1, in which the third optical axis is tilted with respect to the substrate such that the first field-of-view of the first region partially overlaps the third field-of-view of the third region.

17. The optoelectronic module of claim 1, in which the first field-of-view and third field-of-view partially overlap.