Published Aug 12, 2024
Working distance is the distance between a camera lens and the object being imaged, crucial in applications like microscopy, machine vision, and industrial inspection for precise imaging control.
Field of View (FOV) is the extent of the observable area that a camera can capture. The relationship between FOV and working distance is an important aspect of imaging system design.
For a simple lens system, the linear FOV (FOV_l) can be calculated using the following formula:
FOVl=2×(WD×tan(θ/2))\text{FOV}_l = 2 \times (\text{WD} \times \tan(\theta/2))FOVl=2×(WD×tan(θ/2))
where:
In cases where the angular FOV is small, the tangent function can be approximated, simplifying the formula to:
FOVl≈WD×θ\text{FOV}_l \approx \text{WD} \times \thetaFOVl≈WD×θ
Working distance is a fundamental parameter in camera and imaging systems, affecting optical performance, safety, accessibility, and lighting. Understanding the relationship between FOV and working distance helps in designing and optimizing imaging systems for various applications, from machine vision and microscopy to industrial inspection and photography. By carefully adjusting the working distance and choosing the appropriate lens, one can achieve the desired balance between FOV and magnification, ensuring high-quality and effective imaging results.
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