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Taking pictures with the joker² light barrier system
Copyright eltima electronic 2022
Alignment of the light barrier to the camera and the subject
Depending on the direction of flight of the subjects, the position of the cam-
era and of course the desired result, there are various strategies for how the
light barriers can be positioned.
Plane of focus is parallel to the IR-beam
If the camera´s focal plane is parallel to the light beam, the subject can be
depicted sharply from the left to the right edge of the image, no matter
where it breaks the light beam, see Figure 24.
In this context it is irrelevant whether the light beam itself is installed hori-
zontally or vertically.
If the plane of focus and the light beam intersect at an angle, the subject is
only sharply imaged when it interrupts the light beam at the point of inter-
section of the focal plane and the light beam, see Figure 25.
Figure 25: The plane of focus intersects the light beam
Figure 24: Focus plane is parallel to the beam