Variable-focus depth measuring device and measuring method
A depth measurement and variable technology, applied in the field of optical measurement, can solve the problems affecting the measurement accuracy, affecting the measurement accuracy of the device, changing the reflected light intensity, etc., to achieve the effect of improving the measurement accuracy
Active Publication Date: 2020-04-17
SHENZHEN ORBBEC CO LTD
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Problems solved by technology
Moreover, there are target objects with significantly different light reflectivities, resulting in changes in reflected light intensity that affect measurement accuracy
In addition, the different settings of the transmitter and receiver in the depth measurement device will also affect the measurement accuracy of the device
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[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0037] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be used for both fixing and circuit communication.
[0038] It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", ...
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The invention discloses a variable-focus depth measuring device and measuring method. The variable-focus depth measuring device comprises a transmitting unit, a receiving unit and a control and processing circuit connected with the transmitting unit and the receiving unit. The transmitting unit comprises a light source and an optical element. The receiving unit comprises a TOF image sensor and a zoom lens. The TOF image sensor is configured to collect at least part of light beams reflected back by a target area and form an electric signal. The zoom lens is configured to project the reflected light beams into the pixels of the TOF image sensor, and the field angle of the reflected light beams acquired by the TOF image sensor is changed by changing the focal length of the zoom lens. The control and processing circuit calculates a depth image of the target area according to the electric signal. By arranging the zoom lens, the field angle of the reflected light beams collected by the TOF image sensor can be regulated and controlled in real time, the light intensity or the photon number of the received reflected light beams is further changed, and the measurement precision of the measuring device is improved.
Description
technical field [0001] The invention relates to the technical field of optical measurement, in particular to a variable-focus depth measurement device and a measurement method. Background technique [0002] The depth measurement device can be used to obtain the depth image of the object, and can further perform 3D modeling, skeleton extraction, face recognition, etc. It has a very wide range of applications in the fields of 3D measurement and human-computer interaction. The current depth measurement technologies mainly include TOF ranging technology, structured light ranging technology, binocular ranging technology, etc. [0003] The full name of TOF is Time-of-Flight, that is, time of flight. TOF ranging technology is a technology that achieves accurate ranging by measuring the round-trip flight time of light pulses between the transmitting / receiving device and the target object. It is divided into direct measurement ranging technology and indirect ranging technology. [...
Claims
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Login to View More IPC IPC(8): G01S17/36G01S17/89G01S7/481
CPCG01S17/36G01S17/89G01S7/4816
Inventor 王兆民
Owner SHENZHEN ORBBEC CO LTD