Sciencetech light beam homogenizer is the heart of Sciencetech's Fully Reflective Solar Simulators. When mated to an f/2.5 ellipsoidal light source such as Sciencetech's 200-1K arc lamp housing, it "folds" the input light beam into a uniformly lit spot at a fixed distance away. The output illumination spot size must be indicated at the time of ordering (2", 4", 6", 8"), since the internal optics have to be adjusted to match. This fully reflective design is more efficient than traditional diffuser style homogenizers and does not have the non-linear effect in the UV region.

f/2.5 Input Aperture
The input port is designed to mate with Sciencetech's 200-1K arc lamp housing and therefore has an f/2.5 input aperture.

Comparison With Model 5511BC Beam Homogenizer
This Sciencetech 5520BC Beam Homogenizer has a longer optical path than the 5511BC due to 2 additional internal focusing mirrors. The purpose of these two focusing mirrors is to make it easier to change the spot size (or target distance) of the output beam homogenizer. Although this still involves manual repositioning of the two focusing mirrors, it is still easier than changing the individual angles of the segmented mirror which is nearly impossible for the customer to do themselves without specialized equipment.

Unfortunately, the effects of these additional focusing mirrors absorb more light in the UV region. Although this is a minor effect, it becomes a concern if the Solar Simulator is used for Solar Cell Testing that must meet ASTM E927-91(1997) and IEC-904-9 standards. For solar cell testing, Sciencetech recommends exchanging the 5520BC beam homogenizer with the 5511BC beam homogenizer which does not have the two focusing mirrors so that the UV region more accurately matches the sun.

AM Filter Sizes
The 5520BC accepts up to three 3" x 3" square AM filters.

Focusing and Target Size
The internal mirrors of the Beam Homogenizer need to be specifically aligned for each target size. Therefore once the 5511BC is focused for a particular target size, it cannot be used for another target size as that target size position would be out of focus.

Technical Specifications