OPTICAL INSTRUMENT SYSTEM AND METHOD

• US 20120081509A1
• Filed: 09/22/2011
• Published: 04/05/2012
• Est. Priority Date: 09/27/2010
• Status: Abandoned Application

• Current Assignee: Deere & Company
• Original Assignee: Deere & Company
• Inventors: Correns, Nico, Kormann, Georg, Dietrich, Söldner
• Application Number:
  US13/240,015
• Publication Number:
  US 20120081509A1
• Time in Patent Office: Days
• US Class Current: 348/36
• CPC Class Codes: B60R 1/002 specially adapted for covering the peripheral part of the vehicle, e.g. for viewing tyres, bumpers or the like integrated in the windows B60R1/001; combined with rear-view mirrors B60R1/08
• CPC Class Codes: B60R 2300/101 using cameras with adjustable capturing direction
• CPC Class Codes: B60R 2300/102 using 360 degree surveillance camera system
• CPC Class Codes: B60R 2300/8093 for obstacle warning
• CPC Class Codes: G02B 13/06 Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
• CPC Class Codes: G02B 17/0896 with variable magnification or multiple imaging planes, including multispectral systems systems with only refractive elements G02B15/14
• CPC Class Codes: G02B 23/08 Periscopes arrangements on floating structures of underwater viewing devices B63C11/49; arrangement of visual watch equipment on submarines B63G8/38
• CPC Class Codes: G03B 37/02 with scanning movement of lens or cameras
• CPC Class Codes: G03B 37/04 with cameras or projectors providing touching or overlapping fields of view
• CPC Class Codes: G03B 37/06 involving anamorphosis G03B37/02, G03B37/04 take precedence
• CPC Class Codes: G05D 1/0248 in combination with a laser lasers per se H01S
• CPC Class Codes: H04N 13/218 using spatial multiplexing
• CPC Class Codes: H04N 23/60 Control of cameras or camera modules
• CPC Class Codes: H04N 23/698 for achieving an enlarged field of view, e.g. panoramic image capture

Abstract

An optical instrument system produces and analyzes images of the surrounding area. The system includes an overview lens with a symmetry axis which produces a first circular image of the surrounding area. The system also includes an observation lens which captures a second image of the surrounding area, and which is pivotal over 360° about the symmetry axis, and which is spaced apart a predetermined distance from the overview lens. The observation lens has an optical axis which is perpendicularly to the symmetry axis. The system includes an imaging optics system which reproduces the images of the surrounding area as overview image and observation image on a surface detector. A control unit controls the observation lens. An evaluation unit analyzes the images, and, for selected objects, which are detected both in the overview image and also in the observation image, determines the distance to said objects.

Claims

1. An optical instrument system for observing a surrounding area, comprising:

an overview lens which captures a first circular image of the surrounding area about a symmetry axis;

an observation lens which captures a second image of the surrounding area, and which is pivotable about the symmetry axis over an angular range of at least 360°

, the observation lens being spaced apart a predetermined distance from the overview lens, and having an optical axis of which is oriented perpendicularly to the symmetry axis;

a surface detector;

a control unit for controlling the observation lens;

an imaging optics system which transmits the first and the second images as an overview image and an observation image to the surface detector; and

an evaluation unit which analyzes the images, and which, for selected objects which are detected both in the overview image and also in the observation image, determines, as a function of a separation between the overview lens and the observation lens, a distance to these objects, and transmits a distance signal to the control unit for further processing.

2. The optical instrument system of claim 1, wherein:

the evaluation unit analyzes overview images, recorded sequentially over time by the surface detector of objects which move relative to the optical instrument, and, if such a moving object which increases in size, is detected, transmits a position determined as a function the sequence of overview images to the control unit; and

the control unit aims the observation lens at the moving object.

3. The optical instrument system of claim 1, wherein:

the evaluation unit analyzes, for the selected objects, after the determination of the distance, a change in size and/or position in overview images recorded sequentially over time, and determines the distance as a function of the changes.

4. The optical instrument system of claim 1, wherein:

the overview lens comprises a panoramic lens with a field of view which extends over an angle of at least 360° and

which has a cylindrical, conical or spherical lateral surface, and which has a spherical inner surface which is covered with a reflective coating, and which has a planar or conical front surface.

5. The optical instrument system of claim 1, wherein:

an output of the optical instrument system control unit is connected to a steering control unit of an agricultural vehicle, the steering control unit automatically guiding the vehicle in response to signals from the optical instrument system control unit.

6. A method for optical monitoring of an area surrounding a unit, the method including the following steps:

with an overview lens, capturing a first circular image of the surrounding area about a symmetry axis of the overview lens;

with an observation lens, capturing a second image of the surrounding area, the observation lens having an optical axis which perpendicularly to the symmetry axis, and the observation lens being spaced apart a distance along the symmetry axis from the overview lens;

via an imaging optics system, transmitting the first image as overview image, and transmitting the second image as observation image, simultaneously on to a surface detector; and

with an evaluation unit, analyzing the images, and, for selected objects which are detected both in the overview image and also in the observation image, determining the distance to these objects as a function of the separation between the overview lens and the observation lens, and transmitting a distance signal to a control unit for further processing.

7. The method of claim 6, further comprising:

with the surface detector, recording overview images sequentially over time;

with the evaluation unit, analyzing the images with respect to objects which are moving relative to the unit; and

if such a moving object is detected which has an image which increases in size, the evaluation unit transmitting a position determined as a function of the sequence of overview images to the control unit; and

the control unit selecting the moving object, and aiming the observation lens is aimed at the moving object.

8. The method according to claim 7, wherein:

for the selected objects, after the determination of the distance, monitoring the distance as a function of the overview images, and the evaluation unit analyzing changes in size and/or position between overview images recorded sequentially over time.

9. An agricultural vehicle comprising:

an optical instrument system for observing a surrounding area, the system having an overview lens which captures a first circular image of the surrounding area about a symmetry axis, an observation lens which captures a second image of the surrounding area, and which is pivotable about the symmetry axis over an angular range of at least 360°

, the observation lens being spaced apart a predetermined distance from the overview lens, and having an optical axis of which is oriented perpendicularly to the symmetry axis, a surface detector, a control unit for controlling the observation lens, an imaging optics system which transmits the first and the second images as an overview image and an observation image to the surface detector, and an evaluation unit which analyzes the images, and which, for selected objects which are detected both in the overview image and also in the observation image, determines, as a function of a separation between the overview lens and the observation lens, a distance to these objects, and transmits a distance signal to the control unit; and

an automated steering control unit which is connected to an output of the optical instrument system control unit, and which automatically guides the vehicle in response to signals from the optical instrument system control unit.