9/10/2023 0 Comments Cloud ceiling projectorThat light then bounces off a matrix of electrically controlled microscopic mirrors that determine the brightness of each individual pixel. There are a few different styles of DLP, Single chip and 3-Chip. In single chip DLP, a light source is passed through a rapidly spinning multi-segment color wheel of 3 or more dichroic glass sections (7 or more color segments is a more “desirable” spec than 3). This is one of the most commonly used projector types, and they often provide the most bang for your buck. A big selling point on DLP technology is that it can display much darker blacks than LCD technology which is especially helpful for illusions like projection mapping. Below, I’ll briefly explain each type, and you can check out some links in my sources for further reading: DLP Each technology uses a different combination of light sources, mirrors, filters and lenses. There are several different kinds of imaging and illumination methods used in video projectors, and each type has their own list of pros and cons. Onion Skin by Olivier Ratsi – Re-composition of time and space using perspective Overview of Projector Types After that, it’s up to you if you want to sketch out placement on paper, model their placement in a 3D rendering, or make a scale diorama. Pictures and CAD drawings of the space are next in line of importance of things you should obtain for the space, even if you visit it. A visit will get you the best sense of space, available electrical outlets, positioning options and the sense of ambient light. Visiting the installation space in person is optimal when starting to plan. What image size are you trying to achieve?.Where are people (or other objects?) going to be in relation to the projectors?.How will you run cleanly run cables from your command station to the projectors? (More on cable lengths later).Will the venue allow you to drill into the ceiling?.How will you mount or place the projector?.How much ambient light is there? Is it a bright show room, or a dim purpose-lit space? Is there lighting design?.Inside or outside? Daytime or nighttime?.What are you projecting on? Flat surface or complex geometry? Is it an unusual shape/curved/architectural/sculptural.Standard screen? Front or rear projection?.What is the surface or object you’ll be projecting on?.Some of these topics will be covered more in depth later on: Each decision made here has it’s own list of caveats and considerations that can affect the final outcome. Here is a sample checklist that you can go through when planning to choose a projector for an interactive installation or large event. Maintenance, Miscellaneous caveats and tricks of the trade.Discussion of video signal quality and cable lengths.How to calculate projector intrinsics/How to read and interpret a spec sheet.A checklist for planning your installations.There is something technical about projectors that seems to mystify some people, but it is really important to remember that they are just a flashlight that shoots a square shaped image. In the end, however, essentially all projectors can be described as little more than a bright light element, imaging elements, and a lens. They vary in price from a couple hundred dollars, to a couple hundred thousand dollars. They vary in scale from pocket-sized (or smaller) pico’s to refrigerator sized large-venue projectors. This will gather some of that disparate knowledge into the important bits you need to make informed decisions about creating a high quality experience. Part 1 will focus on the projector as hardware(lenses, lumens, surfaces etc), and part 2 will go into more details on the software and calibration considerations. The information for projectors is available on various websites, but this 2 part guide will focus on their use in production and interactive environments. Video projectors are one of the most important tools for creators of interactive installations. Guide to Projectors for Interactive Installations
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