Various new designs were proposed to improve the spatial uniformity of the output light. This also required the optical axis of the light source to be at an angle and laterally above the target plane which further complicated the task.
New designs were brainstormed and evaluated for their performance. Each idea was prototyped and various parameters were changed to assess the effects on the spatial uniformity. The idea that showed the most promise was changing the lateral and angular position of the output lens of the system. This idea was then modeled using optical modeling software to better understand the effect on the spatial uniformity. Once the idea was better understood, it was further optimized using the optical modeling software to meet the specialized needs of the system.
The idea then moved to the mechanical design phase. A way to easily reproducibly adjust the output lenses was required. Various methods were investigated and a custom lens holder with specific lateral and angular adjustment capabilities was developed so that the fine adjustments required of the output lens could be achieved to produce a spatially uniform target plane that was not perpendicular to the optical axis of the solar simulator.