Sunlight illumination optical system of south exit of tunnel

Abstract

A sunlight illumination optical system of a south exit of a tunnel comprises a parabolic cylinder curved surface light adjusting lens, a parabolic cylinder curved surface condenser lens, an emitting groove, a secondary light guide lens, a plane mirror set and a primary light guide lens, a condenser is formed by the parabolic cylinder curved surface condenser lens facing the sun and the parabolic cylinder curved surface light adjusting lens having the same focal point with the parabolic cylinder curved surface condenser lens, parallel sunlight is condensed by the parabolic cylinder curved surface condenser lens and then becomes parallel light after light paths are adjusted by the parabolic cylinder curved surface light adjusting lens, the parallel light is output out of the emitting groove of the parabolic cylinder curved surface condenser lens to the primary light guide lens and reflected into the secondary light guide lens by the primary light guide lens, reflected light of the secondary light guide lens has the same direction with the tunnel, the secondary light guide lens is arranged outside the south exit of the tunnel, and the inclined plane mirror set is arranged at the positions, located in the light paths of the secondary light guide lens, of the top of the tunnel and used for transmitting the sunlight onto all road surfaces in the area of the south exist of the tunnel. The sunlight illumination optical system of the south exit of the tunnel is simple in structure and therefore has broad application prospects.

Description

technical field [0001] The invention relates to the field of solar lighting, in particular to an optical system for solar lighting at the south exit of a tunnel. Background technique [0002] For road tunnels, in addition to the need to install day and night lighting systems to ensure the basic lighting brightness requirements, there is another great feature, that is, car drivers specifically require the brightness gradient (brightness rate of change) must be limited within a certain range, otherwise there will be "black hole" and "white hole" phenomena and cause accidents, that is, the brightness (compared to the brightness of the outside environment) in this important and most dangerous section is a Compared with the relative value of the brightness of the outside environment rather than the absolute value; once the driver has adapted to the change in the brightness of the light after passing through this brightness transition interval, and the vision of the driver's eyes ...

AI Technical Summary

Problems solved by technology

However, due to the poor working environment of the automatic control system and other reasons, the failure rate is high, and its system maintenance is very difficult. Therefore, most of the actual projects still use a fixed brightness lighting scheme: that is, the brightness gradient value of the tunnel transition area must be less than The brightness gradient limit under the strongest sunlight at noon in summer, this limit data is obviously for the weak light (in the three seasons other than summer, especially) winter, rainy days and night, the lighting source in the brightness transition interval is There is a waste of energy

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