To test the sector of view of an LED Security Camera, you can discuss with the subsequent steps:
Clarity test: Use the same lens (encouraged to apply constant cognizance and twin variable lens), with the middle circle of the take a look at card appearing on the left and proper facets of the reveal display screen, and simply and correctly rely a total of 10 units of vertical and 10 sets of horizontal traces for the given scale lines. Representing vertical clarity and horizontal clarity respectively, and the corresponding set has given the variety of traces. If the vertical 350 line is horizontal 800 line, it is great to apply a black and white display presently. During trying out, it is viable to recognition on distant items or cognizance whilst measuring. It is satisfactory to apply each to look the distinction among this camera (for a long way and near convergence).
Illuminance check: Place the digicam in a darkroom, with energetic 220V self igniting lamps in the front and behind the darkroom. Install a voltage regulator on the vicinity to regulate the brightness of the lighting fixtures within the darkroom. The voltage may be adjusted from 0V to 250V.
Ball distortion test: Place the take a look at card at the front of the digicam in order that the complete ball seems at the display screen. Look for an ellipse inside the ball form, pass the digicam forward to see if the center of the circle is enlarged, and then test the rims, corners, and frames for arc distortion from a distance.
Color reproducibility test: A colour reveal have to be decided on to test this parameter.