# Projector ![](/files/flrMTg8o2pFH41kOwnIx) I have covered projectors in depth in [another article](https://github.com/laserpilot/Guide_To_Projectors_For_Interactive_Installations/blob/master/Guide%20to%20Projectors%20for%20Interactive%20Installations.md) (it is from 2014, so it needs an update as well) so I won’t go into detail with them here. It is important to remember that they are not much more than a fancy implementation of a light source, an imaging element and a lens. They are best for darker environments, but they tend to be the most economical choice for large scale imagery. It is also easier to blend multiple projectors together more seamlessly. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://blair-neal.gitbook.io/survey-of-alternative-displays/standard-displays/projector.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.