DESIGN CONSIDERATIONS INFLUENCING THE SIZE AND COST OF OPTICAL COMPONENTS IN AUTOINSTRUCTIONAL DEVICES
Abstract
The increasing demand for low-priced projectors for self-instructional purposes has prompted investigation of design factors which contribute to the manufacturing costs in this class of product. Because cost and intended use are prime factors, design must be cased upon the optimum combination of optical components which satisfies these design objectives. The problems of the projector design itself are considered, primarily the design considerations for optical components that might be used. Recent developments in lens and reflector fabrication methods do not yet permit a reduction of cost below that of conventional methods and designs. Some principles and practices for rear projection are presented, and the interdependence of major factors involved in maximizing screen performance is expressed in mathematical terms. The environmental factors of room illumination level, audience size and the contrast of the filmed material are found to be highly influential in the design of a rear projection device.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1965
- Accession Number
- AD0617609
Entities
People
- Edgar A. Smith
- William H. Trow