Fulldome Projection System with Segmented Sidewall and Zenith Projectors
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Solution Overview
Problem
Current fulldome image projection systems often fail to provide an immersive and seamless viewing experience due to gaps in image coverage and shadows cast by users within the dome, limiting the area where viewers can move without obstructing the projected images.
Innovation Solution
A fulldome image projection system featuring a dome-shaped enclosure with sidewall projectors positioned in a circular, angular configuration to project overlapping images onto a spherical cap screen, complemented by zenith projectors that cover the top area, ensuring comprehensive image coverage and minimizing shadowing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If users are allowed to move freely inside the dome, then viewer mobility and immersion are improved, but shadows are cast on the projected images reducing visibility
Solution Approach 1:
The projection system is divided into multiple independent projectors (first plurality for lower areas, second plurality for upper areas) positioned at different locations. This segmentation allows light to come from multiple directions simultaneously, so when a viewer blocks light from one projector, other projectors continue to illuminate the screen, reducing shadowing while maintaining mobility
Solution Approach 2:
The system transitions from conventional single-direction or limited-angle projection to multi-dimensional projection by positioning projectors both below and above the equatorial plane of the dome. This three-dimensional arrangement of projection sources ensures comprehensive coverage from multiple spatial dimensions, eliminating shadowing while preserving viewer freedom of movement
2Device complexity
If conventional projection systems are used, then device complexity is reduced, but image coverage has gaps and immersion is compromised
Solution Approach 1:
The dome screen is divided into lower and upper areas, each covered by dedicated projectors positioned appropriately. The first plurality of projectors covers the lower areas while the second plurality covers the upper areas, ensuring complete coverage without gaps. This segmented approach maintains reasonable device complexity while achieving continuous immersive coverage
Solution Approach 2:
The system merges multiple projection systems into a unified fulldome environment by coordinating first and second pluralities of projectors to work together. The overlapping projection areas and synchronized operation create a seamless continuous image across the entire dome surface, enhancing immersion while managing complexity through integrated control
3Area of stationary object
If projectors are positioned to cover maximum area, then image coverage is improved, but light intensity becomes excessive in certain areas
Solution Approach 1:
Different regions of the dome receive optimized illumination from projectors positioned to target specific areas. The first plurality of projectors is configured to illuminate lower areas with appropriate intensity, while the second plurality targets upper areas. This local optimization ensures uniform light distribution across the entire dome without excessive intensity in any single region, achieving both comprehensive coverage and balanced illumination
Data Source
AI summary
Fulldome image projection systems are adapted to facilitate projection of images onto a dome screen to create an immersive virtual environment. According to one example, an image projection system may include a fulldome screen formed at least substantially as a spherical cap. A plurality of sidewall projectors may be positioned within the screen and spaced from each other in a generally circular shape. The plurality of sidewall projectors may be oriented in an angular projection configuration. At least one zenith projector may be oriented to project images toward at least a portion of a zenith of the fulldome screen. Other aspects, embodiments, and features are also included.