Vision System Coplanar Sensor Emission Surface Focus Adjustment
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Solution Overview
Problem
Existing fixed vision systems are complex to install, require dedicated operations for focusing adjustment, and lack visual indication of focusing status, necessitating the use of expensive equipment and time-consuming methods for checking and adjusting focus.
Innovation Solution
A fixed vision system with a light-emitting device generating a luminous reference figure, allowing for visual checking and adjustment of focus during installation, using a sensor and light-emitting device positioned to ensure the sensitive surface and emission surface are coplanar with the image plane, enabling manual or motor-driven adjustment of the objective for precise focusing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed vision system is installed without visual focus indication, then the system structure remains simple, but the installation complexity increases and focus adjustment becomes difficult
Solution Approach 1:
A light-emitting device is introduced as an intermediary element between the objective lens and the sensor. This device emits light that passes through the objective lens, creating a visible reference figure that mediates the focus adjustment process. The reference figure serves as a visual indicator that allows installers to determine focus status without complex electronic displays or sensors being activated.
Solution Approach 2:
The vision system performs self-diagnosis regarding its focus status by utilizing the light-emitting device and objective lens combination. The system automatically generates a visible reference figure that indicates whether the sensor is properly focused, allowing the installer to self-verify focus without external testing equipment or complex diagnostic procedures.
2Loss of information
If the sensor and light-emitting device are positioned at different planes, then the optical paths are independent, but the focus verification becomes impossible without activating the sensor
Solution Approach 1:
The light-emitting device and sensor are positioned at the same image plane, creating equipotential conditions for optical path length. This ensures that light emitted by the light-emitting device travels the same optical distance as light reflected from the target object to the sensor, allowing the reference figure to accurately indicate focus status without requiring differential positioning or complex optical path compensation.
3Measurement precision
If focus checking requires sensor activation and image display, then accurate focus can be verified, but installation time increases and expensive equipment is needed
Solution Approach 1:
The light-emitting device functions as a temporary, simple optical aid during installation rather than a permanent complex system. It provides the necessary visual feedback for focus adjustment without requiring expensive displays, computers, or sensor activation. Once focus is achieved, the light-emitting device's role is complete, having served its purpose as a disposable installation tool.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Simplifies the installation process by allowing visual verification of focus without activating the sensor, reducing the need for complex equipment and shortening the installation time, while enabling precise focusing and adjustment of the vision system.
Implementation Method 1
a light-emitting device for generating a luminous reference figure on the detecting plane
Implementation Method 2
at least an objective through which a luminous radiation coming from the object is directed to the sensor
Data Source
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AI summary
A fixed vision system comprises a sensor (2) for acquiring an image of an object on a detecting plane (38), said sensor comprising a sensitive surface (10), a light-emitting device (3) for generating a luminous reference figure (39) on said detecting plane (38), said light-emitting device (3) comprising an emission surface (51; 89; 61d; 61e; 61f), at least an objective (36) through which a luminous radiation and a further luminous radiation pass, said luminous radiation coming from said object and being directed to said sensor (2) and said further luminous radiation coming from said light-emitting device (3) and being directed to said object, wherein said sensor (2) and said light-emitting device (3) are positioned in such a way that, when said detecting plane (38) is focussed by said objective (36) on said sensor (2), said sensitive surface (10) of said sensor (2) and said emission surface (51; 89; 61d; 61e; 61f) of said light-emitting device (3) are on the image plane (69; 73; 92) generated by said objective (36), said sensitive surface (10) of said sensor (2) and said emission surface (51; 89; 61d; 61e; 61f) of said light-emitting device (3) being coplanar.