A 16mm CCTV lens and USB camera were set up, with the focal length adjusted to 200mm.
Under the above conditions, observation of a 80x60mm field of view is achievable.
The object is marked on a completely transparent glass surface (as shown below).
■ Ring light
Due to the wide observation range, which differs from that of micro lenses, the ring light results in complete reflection.
■ Dome light (indirect light)
The areas illuminated can be observed uniformly, but shadows (in the center) occur in the observation window area.
Additionally, even with a 150mm diameter light (the largest available from our company), a field of view of 80x60mm cannot be achieved.
■ Bar light
Using two 20cm bar lights to evenly illuminate the glass makes it easier to observe the glass itself.
■ Transmitted light
If the goal is to view transparent glass evenly, transmitted light offers the most stability.
We offer a variety of transmitted light solutions in different sizes.
