Which material is known for excellent light pipes reducing lateral light diffusion?

Cesium Iodide is recognized for its outstanding ability to act as a light pipe, significantly reducing lateral light diffusion. This property is crucial in imaging applications, especially in the realm of fluoroscopy, where clarity and precision are paramount.

The structure of cesium iodide crystals allows for efficient transmission of light with minimal scattering, meaning that the light produced in response to radiation can travel more directly to the detector. This characteristic enhances image quality by ensuring that the light output is more concentrated and focused, thus improving the contrast and resolution of the resulting images.

In contrast, the other materials mentioned do not exhibit the same level of effectiveness in controlling lateral light diffusion. Zinc Cadmium Sulfide and Calcium Tungstate are more widely used in different applications but do not provide the same degree of light directional control as cesium iodide. Gadolinium Oxysulphide is known for its efficiency in converting radiation to light but also does not match the performance of cesium iodide in minimizing light spread. Therefore, cesium iodide stands out as the preferred material when the goal is to achieve superior image quality through effective light management.