Passive optical element with selective angular reflection
This work is related to the development of passive selective transmission materials that will contribute to regularize the solar thermal gain. We propose an original solution to the problem of seasonal control of energetic input into buildings through windows. A passive optical element with selective angular reflection is used to solve this problem. This optical element allows sunlight to enter windows during the fall and winter, whereas, owing to the different astronomical path of the sun, it stops and rejects direct sunlight by means of the optical effect called total internal reflection (TIR) during the central spring-Summer period. The purpose of this paper is to describe the optical element in some detail, to develop the principal design equations, and give the results of the optimization of optical and geometrical parameters.
- Research Organization:
- University of Quebec, INRS-Energy, C.P. 1020, Varennes, Quebec J0L 2P0
- OSTI ID:
- 6894800
- Journal Information:
- Appl. Opt.; (United States), Vol. 26:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
HEAT MIRRORS
DESIGN
LIGHT TRANSMISSION
REFLECTIVE COATINGS
WINDOWS
INCIDENCE ANGLE
OPTICAL EQUIPMENT
PERFORMANCE
REFLECTIVITY
SOLAR CONCENTRATORS
SOLAR CONTROL FILMS
SOLAR RADIATION
TRANSMISSION
COATINGS
EQUIPMENT
FILMS
MIRRORS
OPENINGS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
SOLAR EQUIPMENT
STELLAR RADIATION
SURFACE PROPERTIES
141000* - Solar Collectors & Concentrators
657000 - Theoretical & Mathematical Physics