Unlock instant, AI-driven research and patent intelligence for your innovation.

A light projector and vision system for distance determination

A technology of light projectors and light sources, applied in the field of light projectors and related vision systems, can solve the problems of rigid, expensive, complex multi-focus systems, etc., and achieve the effect of improving performance

Inactive Publication Date: 2013-03-20
SIGNIFY HLDG BV
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such multifocal systems tend to be relatively complex, rigid, expensive and suboptimal
[0005] Furthermore, while increasingly advanced and complex applications of optical patterns have been proposed, these tend to be application-specific or perform suboptimally

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A light projector and vision system for distance determination
  • A light projector and vision system for distance determination
  • A light projector and vision system for distance determination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0063] figure 1 A diagram showing an example of a light projector according to some embodiments of the invention.

[0064] In this example, the light projector comprises an arrangement of elements, in particular a stack of layered planar optical elements. However, it should be appreciated that in other embodiments curved elements may be used, for example.

[0065] In this example, the stack comprises (in the direction opposite to light emission): a microlens array 101 and a set of planar optical elements (hereafter also referred to as pattern elements or layers) for providing the light pattern. Thus, the set of planar optical elements provides multiple light patterns to the microlens array 101 which provides a focusing effect on the light patterns such that these light patterns are focused at different focal lengths.

[0066] In a particular example, the light projector further includes an internal light source 105, which in this example is a planar light source. The planar...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A light projector comprises a stack of layered planar optical elements where the stack comprises a group (103) of planar optical elements (107-111) arranged to provide a plurality of light patterns. The stack may specifically comprise a group of transparent layers having opaque patterns such that light propagating through the layers results in the light patterns. The light patterns reach a microlens array (101) which is arranged to focus the light patterns at different focal distances. In some scenarios, programmable optical elements may be used to generate the light patterns. A vision system may determine characteristics of objects based on reflections of the projected light patterns. The approach may in particular provide an efficient yet low cost light projection system for distance determiation.

Description

technical field [0001] The present invention relates to a light projector and associated vision system, and in particular, but not exclusively, to a method for detecting a property of an object from reflection of projected light. Background technique [0002] The advent and increasing availability of complex signal processing and the increasing availability of controllable optical elements has resulted in optical and vision systems becoming increasingly complex and offering increasingly advanced functionality. Indeed, optical or vision systems are increasingly used to provide automated or assisted functionality such as object detection, distance determination, and the like. [0003] As an example, US patent US7012750 discloses a system in which an optical pattern is projected onto an object and used to focus a camera. The system includes a focus detection device for adjusting the focus of the camera until the pattern is in focus. The disclosed system generates optical patt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02G01B11/14
CPCH04N7/18G01B11/026G01B11/14F21V5/004
Inventor F.J.德布鲁伊恩H.A.W.施梅茨
Owner SIGNIFY HLDG BV