Ring lights are commonly used in microscopes and magnifying devices.
It is suitable for applications that require bright illumination of a relatively confined (narrow) area.
Conversely, it is not suitable for achieving uniform brightness over a large area.
When a 15cm ruler is illuminated with a ring light, it appears as shown in the photo below.
We compared a sheet of white paper using a ring light and a stationary bar LED.
(Ring light) ＊The light distribution is significantly uneven.
(Stationary bar LED) *It can illuminate relatively evenly.
Depending on the size, a bar LED may be more suitable for industrial use.
Inspection tables equipped with bar LEDs, as shown in the photo below.
There are also stand-type (stationary) models, as shown in the photo below.
Additionally, there is the option to combine bar LEDs.
There are also professional square-type lights.
The photo below shows a model where the angle and illuminance of the four directional bar LEDs can be independently adjusted.
The bar LED is also a long type, with 120 LEDs integrated in one direction.
(Adjustments to the light angle and illuminance are possible.)
There is also the option to use photographic equipment as shown below.
(For photography, light intensity cannot be adjusted. *Adjustments must be made on the camera side.)
＊The following are both products from LPL Shōji Co., Ltd.
